GMT400 Rear Disc Brake Conversion (Part 1)
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- Опубликовано: 28 авг 2024
- This is (Episode 7) of the #ETCGDadsTruck Series.
Link to (Episode 6): • #ETCGDadsTruck Axle/Di...
Episode 8: • GMT400 Rear Disc Brake...
GMT400 Rear Disc Brake Conversion (Part 2) #ETCGDadsTruck:
GMT400 Rear Disc Brake Conversion (Full/Extended Version): www.ericthecar...
This is (Part 1) of a video series where I show you how to install a rear disc brake conversion kit from SSBC on a GMT400 pick up truck. GMT400’s ran from 1988-1998. The truck in this video is a 1990 C1500 Sport.
In this video I cover the installation of the rear calipers and brake hoses. Additional information on how to disassemble the rear end brakes on this truck can be found in these videos.
#ETCGDadsTruck Axle/Differential Rebuild (Part 1): • #ETCGDadsTruck Axle/Di...
#ETCGDadsTruck Axle/Differential Rebuild (Part 2): • #ETCGDadsTruck Axle/Di...
Camera: Brian Kast, Eric Cook
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The best place for answers to your automotive questions: www.ericthecarg...
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Check out my ETCG1 channel: www.youtube.co...
Summit Racing: www.summitraci...
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Thanks for watching!
Parts
SSBC Rear Disc Brake Conversion Kit: www.summitraci...
Russell Steel Braided Brake Lines: www.summitraci...
RT Side Parking Brake Cable: www.1aauto.com...
L Side Parking Brake Cable: www.1aauto.com...
Tools
Eastwood Line Flare Tool: www.eastwood.c...
Tubing Cutter: www.jbtoolsale...
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How To Cut and Flare Brake Lines: • How To Bend and Flare ...
Rear Disc Brake Conversion (the hard way) Ford Fox Body: • Installing Rear Disc B...
How To Fabricate Parking Brake Cables: • How To Fabricate Parki...
How To Rebuild a Brake Caliper: • How To Rebuild a Front...
The Basics of Disc Brake Service: • The Basics of Disc Bra...
The Most Important Part of a Brake Job: • The Most Important Par...
Introduction to #ETCGDadsTruck Build (Episode 1): • #ETCGDadsTruck Build I...
#ETCGDadsTruck 4” Rear Suspension Drop (Part 1) (Episode 3): • #ETCGDadsTruck 4” Rear...
ETCG Gets a Truck: • ETCG Gets a Truck!
#ETCGDadsTruck Playlist: • #ETCGDadsTruck Build I...
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Due to factors beyond the control of EricTheCarGuy, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. EricTheCarGuy assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. EricTheCarGuy recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of EricTheCarGuy, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not EricTheCarGuy®.
"It's good to temper your tools by throwing them on the floor occasionally" I LOVE THAT!
Yep, it builds character (Calvin & Hobbes comic homage).
This guy is a great mechanic, extremely professional and competent.
Follow him closely....
Ķ0oppoi000000
Along with several 4 letter words...
Lots of people have no idea what they're doing. But the talented ones can end up making it work.
You're super right, sometimes nobody knows what you're doing but we still cant stop watching!😂
Eric, the quality of your videos is the best I have seen. I learn so much from watching you work on your cars. Things like troubleshooting missing parts, things that dont fit as intended, tricks on how to line things up etc. Really thankfull to you.
Thank you! I really appreciate that comment.
In my experiences with aftermarket conversion kits, I've found these are usually the case-
#1 They're expensive.
#2 Instructions are usually incorrect in some way or another. You end up calling their tech line and they STILL scratch their heads and say "Hmmm. We've never run into that problem".
#3 Modification is ALWAYS needed, despite what the incorrect instructions say. "Modify to fit" is ALWAYS the case.
#4 Incorrect fasteners. Multiple trips to the hardware store are in order, especially for dealing with reason #3.
#5 They're expensive....oh, I covered that for #1 reason, sorry.
Them fasteners in that kit LEAVE a lot to be desired and look Chinese....
The only brake kit that hasn’t wound up as a complete pile of frustrating garbage in my experience is stuff made by wilwood. Was very prepared for a fight, and was pleasantly surprised.
@@bransonfleischman2233 I would agree, they have quality. We are awash today with quantity of basically chineese JUNK. Quality went out the window in the race to the bottom of garbage - yet they charge a quality price.
@@bransonfleischman2233 find my comment above.i did the whole thing,for 400,bolt on,no probs,willwood is for ferrari drivers.or bottom less pockets.it seems that chevy gear fits ford trucks better than chev conversions.weird,eh.???.maybe ford sold it to chev in the first place,so it dont fit...ha ha..
..yes, the brakes usually suck on these trucks, but it's usually in the hydroboost and master cylinder..replace them with the later style, put on premium shoes, and adjust correctly...I really don't care for rear discs on a truck...son's '04 Tahoe(GMT 800) has them, and I am not impressed..plus, the parking brake on those really sucks..worse than on my 1990 GMT 400...also, these conversions often require larger diameter wheels and tires..I don't like/want larger diameter wheels, either...just upgrade the booster/cylinder, put on new QUALITY(yes, I know that is hard to find nowadays)front pads and rotors, calipers if needed, and rear drums and shoes..adjust shoes properly..you should now have good brakes..no rear discs needed....
The most patient guy I’ve ever seen in my life I was cussing about the parking break and I wasn’t even installing it 😂
I did the disk brake swap for 400, rotors from a 96 impala, and the caliper brackets and universal calipers from speedway motors. There’s a write up online.
Parts list ??
I watch you BECAUSE you film your mistakes. I make them too, but I don't know what to do when I make them. If everyone was honest (and they aren't) they would admit it too.
Thanks.
Always remember you get what you pay for. Spend the money now, to save the stress later. Great choice for a upgrade. Edit: not summit's best work!!
I am trying to imagine how much effort and time you put to make this video as it is. Thank you so much Eric.
It was considerable. Thanks for noticing and commenting.
LOL! They must have changed out the calipers. My 95 kit came with 87' Turbo Coupe calipers. I couldn't believe it when I read the packing list. And mine came with stainles braided lines for all 4 corners. Wish I had your video 8yrs ago when I installed mine. Great video.
Fix for moisture under snake on pipe. Get Vaseline (the thin kind) on the pipe, put a heat shrink over that, shrink it. Put Vaseline on the heat shrink, put the snake on. Done. Never had corrosion. Works for torsion bars too, fuel lines etc. IF and only IF you want to spend the extra buck, you can get the kind that glues itself on, it's a bit costly at those lengths, but it is worth it.
We put an SSBC front disc conversion on my Grandma's 1967 Dodge Charger back in 1998ish and the master cylinder from '98 just failed last year. The brakes have been fantastic. Yes SSBC's kit is expensive but their product is pretty good and their customer service has been excellent to me.
Thanks, Eric! I've never done a drum to disc brake conversion. I found your explanations & visuals very elucidating.
Finally someone makes a decent video about gmt 400 rear disc conversion thank you Mr.Eric Great Video
Thanks!
Eric: "tool failure is not an option at this point"
Also Eric: "that explains it, my tools broken"
Love your content Eric. Between you, Charles, and Jason I am always listening to someone who has more of a clue about mechanics than I do. Keep it up!
Damn. Having a lift is so much better than working on a driveway. Some day I'll have one
Took me 20 years. Worth the wait. Good luck.
@@ericthecarguy thanks man I appreciate the comment😀
I need one bad as well
Great kit! I have this on my truck never had any issues. SSBC is the best in the business.
That clock in the background at 2:23 has made my day.
I listen to your videos in the am wile I get ready for work, then watch it at night when I go to bed. Love the videos, keep it up Eric good job
Been over a year, but I noticed the left and right rotors are backwards. Bleeder goes up. Good job at the install.
he was following the instructions
"Yeah don't forget to put your stuff on before you start." Good advice for many things in life.
But for real, how many times have I forgot to put shrink tubing on a wire before crimping the butt connectors? Too many.
Yes, done that too.
Funny since I have done stuff like that in radio & tv since way back......
Amateur radio too.....
I really appreciate the photography all your videos and the description of your videos and the hands-on
Great rear drum brake to rear disk brake conversion kit video.Nice clean job improvising as you went along with the job.Damnskippy.
Ridgid tubing cutters. Only one to use. Good video will do disc on the 95 bronco soon! Great video Eric
I used a 99-02 NBS master cylinder on our 98 and its a big time improvement.
being a mechanic is like a doctors practice you have to be like Dr. house, know the Environment to Diagnose the Car. Dr. EricTheCarGuy
You are a very useful man. the people they have American Truck in the Middle East they are suffering
Change the front brake lines to the caliper and the spongy feel more than likely goes away. Old lines expand with pressure causing the "spongy" pedal
Eric, maaaan you are awesome with this stuff! No one else does it better!!
I installed a disc brake kit on my 64 F100 and I had the same problem with the parking brake cable. I ended up installing the mounting bolts the way the instructions wanted but used some extra bolts and washers to move the bracket inboard some to clear the mounting bolts.
I work exactly the same way and figure it out as I go. Great work!!!
We're all just learning as we go, collecting knowledge along the way.thank u etcg
Can't believe how clean the truck is under. I've worked on trucks about the same age here in northern canada and everything is rust, rusted off or rusted through, seized and rounded off. God i wish i had California weather and keep cars forever.
Your dad should be happy with that truck when your finished with it. My dad has had his truck for 49 years now.
This was awesome! You're an amazing mechanic/tech/car doctor Eric, keep up the great work! 💯 Can't wait for Part 2!
I’d be scared to death of work hardening those lines from bending them so much and then they snap or crack in spots. My luck. That truck is coming together nicely. Excellent work. 👌🏻
I have those exact same Russell Brand brake lines on my 94 C1500 and that took care of all the squishiness I still have the original master cylinder but with ceramic pads in the front. My brakes are awesome
Honestly, I believe that is the best upgrade of this series.
Good vid Eric, that kit is a rip off at $1000. But your work is excellent.
@Michael Madden Sure looks like it the fasteners from the farm co-op NOT impressed....
@@cive666xx by the amount Eric paid for that kit, I was expecting stainless steel.
The problem was created by using cheap shit in the design process. Sometimes you have to pay to play kid.
Yeah. For a cool grand it should have a much newer design of caliper
Oh thanks. Just saved me from watching this video.
Yeah, those flat top master cylinders ALWAYS feel mushy. I swapped it out on my 1996 Express with a late model unit off a 2002 Suburban, and what a difference! No other changes, so yes, you can just change the master cylinder.
Same on my 96 tahoe.
A lot of work for mainly rear disks, the front is the one that does most of the work, rear is only there to keep you in line or park brake.
Man I love watching you work , Eric. You have a shit load a knowledge, and you are intuitive with the way you work and its clear that you have a lot of experience.
Dang... It seems no one makes a direct bolt on kit for the GMT400. I wouldnt be able to do this job on my GMT without having to buy a brake line flare tool. Great work so far. Part 2 is next.
My 3500 dually (rear drums) has a very firm feel with performance oriented pads.. It was so intense, I swapped to ceramics in the front, which was a dramatic change in braking force.
That bolt ain't engaging the lock nut's plastic lock after snip snip.:)) (i know you fixed it)
Man, this kit is hacky as hell. Seems like something someone threw together to meet a spec sheet.
aserta it seems the wrong sort of lock nut , I would not use nylock nuts on brakes.
@@aytonbob Agreed... a little heat, squishy nylon, no more locking function. I'm no expert, but I think brakes tend to get hot.
@@CheezyDee Nylock nuts are super annoying, especially when someone threads them onto a super long bolt or stud and you can't spin it out by hand once it's loose. Gotta follow it all the way up with the wrench or socket you're using.
i had an issue with bleeding on my datsun truck when i converted the rear drums to disk. i had to mount my caliper upside down(at about 5 o clock) as well because of how low my truck was it was making contact with the frame when mounted on top. luckily the brackets were designed to be used upside down or right side up. i had to take the rotor and sit it on the ground, put the caliper on and hold it all together off the truck to get it bleed correctly as i did not have any special bleeders like you did. i used isuzu calipers and have yet to find a parking brake solution. was pretty envious seeing your backing plate bolted onto the axle, they pressed the backing plate on these little trucks and it was easier to use a dremel and cut it in half than pressing it off.
I like your work, I'm not a mechanic but I have learned from a good friend of ours who's a mechanic and teacher and I'm glad that I have learned to love mechanic's and the work, I watch different video's and most of yah are similar keep up the good work 👍
Thank you Eric always enjoy your videos from South Africa
Watching this. I’m returning mine and just rebuilding the drums lol
Great video Eric. I'd use some 3M VHB to reattach your flaring tools indicator plate. It has some give, but sticks like mad. The give will help it stay on. Great video! :)
That conversion kit is a PITA! This is why:
Bolts so long they protrude out the backside and forced you to cut them so emergency brake cable doesn't rub and become frayed.
No shims for pads, will rattle and make noise.
The hard brake lines were too long. Good thing you have a nice flare tool.
They could've figured out a way to install a small bracket where the hard line connects to the hose.
That's pretty lousy for an expensive, "custom" kit. You did a good job making it work
I also have a GMT400, 1998 GMC pick up and also don't like the 'squishy' breaks. Shortly after I got it, used several years ago I ask a mechanic to adjust the brakes because they felt soft, he told me that there was a couple of years that GM made these trucks that was an issue, not dangerous just not something that didn't fell right. Mine are still that way. Edit: I just got to the part about the parking brake cable, mine hasn't worked since before I got it. I live in Michigan so there isn't a state inspection every year, we don't have one at all. Just send them our money $$$ and get your tabs for the next year.
Eric, whenever I am looking up something wrong with one of my trucks, and when I see you have a video, I immediately click on your solution. What I really want to know, is what is the impact you are using. I think it is something I need to have.
I replaced the vac boost with a hydroboost from a Chevy Astro van in my K1500. It makes a pretty big difference. I had to make a modded rod from the brake peddle to the booster, but otherwise it just basically works
Switch to a gmt800 master cylinder. It has bigger valves and is a common upgrade. It makes a world of difference
Wow! Eric, Just simply amazing, thanks for sharing :)
Eric!! I got a great tip for you! Get rid of the factory master cylinder and get on for a later 2000+ master cylinder. It will get rid of that squishy feeling. I can give u part numbers
Fake it till ya make it brother,thats my motto.... we never know what were doing untill we gave done it at least once lol
Great job Eric! I see you got a good amount of healthy subscribers! Awesome. Thx for all the repairs n updates!
you are a good instructor ; this is the truck i own and want to do same conversion ; the grand for the kit holding me back ;but soon
Eric, $1,000 isnt that bad. I once replaced my O2 sensor on my corolla and I broke off one of the monting bolts. So, I called the dealership and they sold them in sets of 4 only. The cost was $60 for the set of 4. In other words, 4 FRIGGIN bolts cost me a fortune.
I converted to disc brakes on my 10 bolt rear end, I used everything from 2001 2wd Blazer, and I changed the master cylinder and proportioning valve as well, works just fine, I probably had somewhere around $500 in it.
2001 Blazer is 5X4.75" bolt pattern
Great Video Eric, always a pleasure to watch
Since Lincoln didnt have many models in 88 to 91 I'm gonna say the brakes are from a continental , mark 8 or town car.
Mark 7
When I don't have screws or anything to fasten the disc on the Hub assembly to keep it from moving.
I use an old appropriately-sized box wrench on the lug and then I put the lug nut onto the lug to hold things on and then adjust things that way
Awesome video putting the same disc rear kit on my Dodge Dart A body
My Son was fortunate to find a 1996 C1500WT. It had around 56k verified miles. It has the 4.3L Votrec V6, 4L60E auto tranny and 10 bolt differential. We have discussed upgrading to rear disc brakes. We have purchased several items from Summit Racing and have been pleased with their product offerings, pricing and speed of shipment. I am disappointed with several aspects of the upgrade kit. You pointed out a majority of the issues. There are several items that are crude in the design. The parking brake cable mounts leave much to be desired. They appear flimsy, at best, and could be improved with heavier gauge metal and the bracket could be threaded to accept a bolt. The length of the bracket mounting bolt should have been the correct length. This demonstrates lack of detail on the part of the manufacturer. The lack of pad shims is another glaring omission. The lack of backing plates leaves an installation that seems unfinished. Why did the kit not include a bracket to support the differential end of the flexible (rubber) brake lines? It is difficult to understand why the rigid lines were not cut closer to the length needed. The final complaint is: why were torque values not included with the instructions? One could look up the torque values based on bolt grade, diameter and thread pitch. This should have been included. This seems more like an assemblage of parts in a box instead of an upgrade kit. Perhaps this is an early version of the instructions and the manufacturer will improve them based on feedback. I am glad you included this video. I will look for a different kit. There are too many rough edges and missing items in this ”kit” that sells for approximately one thousand dollars. This could be a decent kit if the omitted items and improved instructions were included.
Thank you again for another excellent instructional video.
Sincerely,
Brían S. Du Bois
Evansville IN
I'm glad you found the video useful. Don't blame Summit, the kit was made by SSBC. That said, before you order any parts, I'd recommend watching the next 2 videos in this series. I know it will save you some money.
Eric,
Summit should be made aware they are selling a product that is not up to their usual standards. This will give the manufacturer a chance to improve their product. If they are unwilling to address the shortcoming, then Summit should look for a different manufacturer. Summit might be ahead by producing their own kit from off the shelf parts.
I look forward to you next videos (as I always do).
My Son and I have considered scrapping the 10 bolt differential and replacing it with a stronger unit that has disc brakes as standard equipment. Our biggest question is will the various mounting points on the rear axle be the same with 12 bolt or 14 bolt units and will the single piece aluminum driveshaft be the correct length?
The more we.think about all the headaches... the more we think about leaving well enough along.
Time will tell. I am less ambitious now that I am past 60!
Thank you again. I am waiting for the next parts in the series.
Brían S. Du Bois
Brían Y. Du Bois
That's what this video is for, to make the company that made the kit, SSBC not Summit, aware of the issues that come up when installing their product.
As for the rest, that's pretty much hot rodding. Expect difficulty. Good luck.
Cameraman Brian is doing a great job as are you.
Thank you Eric for all your videos!! I like the car repair and/or car build stuff, but also your sense of humor... Stay dirty ;-)
Plug'n Pray parts. :D
Nice work Eric , I typical "kit" , at least they gave you enough to make it custom ...from 1 builder to another , did you expect a bolt on ...lol
No, no I did not, but that's entertainment as they say.
Thank you for sharing, brother. I think I’ll be doing the same thing, except I’ll put the shorter brake line on the right, and only need to cut the one on the left. I’m guessing that by the length I saw you cut.
You’re right about the spongy brakes on the GMT400. My dad has a 95 Tahoe and I have a 98 Tahoe and the brakes are horrible.
Not sure if you could solve the bolt pattern problem, but the best/cheapest rear disc kit for gm is to just use 98-02 f body parts. They bolt right up. Might need a spacer for the backing plate. Same brakes came on v8 and v6 cars so most yards will have one.
It's the rubber hoses in the brake system that weaken over time and allow just enough expansion to give the mushy feel, in my experience. Eventually these hoses can weaken enough to burst in a hard stop. Went to the funeral of a friend this happened to.
Great vid, I’ll be careful with my brake lines if I go this route!
My concern with the shortened bolt is it is too short to engage the nylon locking collar. Edit didn't wait a minute lol.
The worst thing that can happen is your cable will be flopping about.
I recommend you use the 99-07 classic Silverado master cylinder, or suburban MC works
That “spring thing” acts as protection for the break lines as well as heat sink for the break fluid.
Enjoyed your video on disc brake conversion really detailed and informative thx!!
I think most people these days don’t know what they’re doing and just go with the flow 😂😂
Great video btw 😁
Great job eric
Thanks!
I feel like we all walk around not knowing what we are doing. lol
I think you're right about the spring-stuff around the steel line, seems like a bad idea to me. Steel lines are bad enough for rusting out but that type seems to lack any real corrosion protection.
Cupro-nickel is better! Bends easier too.
My best guess as to what Lincoln those calipers are from would be Continental. They look identical to newer Taurus/Sable rear calipers, and the Town Car uses the drum in hat style like my old Crown Vic did.
It looks like the part number for the rear caliper brake hardware kit is H5739 at Autozone.
Literally looks exactly like my 02' Lincoln ls calipers
I just took a Dana 60 out of a 99 Ford E350 Van and it was practically a straight bolt in. No more squishy pedal and I got the original master cylinder. The emergency brake even works very well on a steep Hill and the whole rear end only cost a couple 100 bucks.
and now you have two different bolt patterns on your rims F/R?
@@MrTaxiRob same bolt pattern.
99 E350 doesn't use the metric pattern.
Nice conversion for the brakes
the steel braided brake lines make a night and day difference
Not sure if someone already asked this but, could those bolts have been flipped around so the nuts were facing the rotors instead? It looked like they wouldn't have interfered with rotor as they would have been inside the rotor hat. This is assuming that the bolt heads aren't as wide as the nuts, allowing for more clearance with the brake cables. In any case, loving the truck build videos! Can't wait to see what's in store next. Cheers! :)
Eric at 13:52 the brake bleeder supposed to be on top so to correct that switch the caliper to the other side
Parking brake in the caliper is an actuator, you’re welcome.
My rear brake line rusted away 15 year's ago on my Silverado, am used to the slow stopping
Makes you wonder if they actually installed it on a vehicle
I was working for them when we did. Pull the car in myself to work on it.
He installed the caliper brackets on the wrong side of the mounting plate,that's why there is a step on the face of it.showes clearly on the directions.
Engineers
my brakes are huge.. gmt400 at 375k miles. there must be a wimpy version in the mix of models. I have never encountered them. Sports car feel on the truck brake is the reason I keep a tow rope for you in my tool box. ;)
Your brake job looks hella good
I'm looking to do this conversion on my 99 Tahoe 4dr 4x4. For me, personally, I would have kept the right side line connector on the different cover in the up position so that should I ever remove the cover again the line wouldn't be in the way. 😁👍
this truck is gunna be sweet
Copper brake lines are recommended for rust belt applications. Good vids...keep it up...🤖
Perhaps, but it's not likely this truck will ever seen winter again. At least in my lifetime.
Who tf wouldnt like this video really good video thanks 🙏