G-Body Rear End Why You Should Upgrade?
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- Опубликовано: 7 окт 2024
- In this video i give two options one why you should keep your stock rear end. then second one why you should upgrade to a performance style rear end for your Gbody your building.
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G-body companies i use & trust for parts
#1 dixie restoration depot
ebay.us/2Wh0t4
#2 gbody parts
ebay.us/8NEkg4
#3 mikes montes
ebay.us/7IqpoY
#4 quick performance racing ( rear end parts)
ebay.us/k6Dgvl
Parts to build your ford 9inch on a budget for your gbody
Ford 9inch housing only for gbody
ebay.us/NwQf1o
Ford 9inch housing & axles for gbody
ebay.us/sT8lqi
ford 9inch third member with posi (limited slip differential) locker
perfect third member for daily/street car
ebay.us/VRE0pW
→ DISCLAIMER
Some of the links are from Ebay are affiliate links. If you purchase a product or service using the links provided, we may receive a small commission. There is no additional charge to you! This helps us continue to create the free content that we publish. We test products and/or services ourselves to personally understand their value. We only promote products, services or companies that we really believe are worth your money.
Here's some links to help you
Parts to build your ford 9inch on a budget for your gbody
Ford 9inch housing only for gbody
ebay.us/NwQf1o
Ford 9inch housing & axles for gbody
ebay.us/sT8lqi
ford 9inch third member with posi (limited slip differential) locker
perfect third member for daily/street car
ebay.us/VRE0pW
→ DISCLAIMER
Some of the links are from Ebay are affiliate links. If you purchase a product or service using the links provided, we may receive a small commission. There is no additional charge to you! This helps us continue to create the free content that we publish. We test products and/or services ourselves to personally understand their value. We only promote products, services or companies that we really believe are worth your money.
have a posi unit in my 7.5 with my 383 pushing 400-450hp and has laid some 200ft burnouts down over 6 years and no problems. Have a turbo 5.3 now though so definitely need the 9inch lol
The problem is the whole rear suspension not just the rear end. Including the frame flex. You need to reinforce it. It flexes a lot and will eventually twist the body.
@@imonaroll9502 do agree the frame and suspension does have problems also especially due to age of the gbodys now adays and also when horsepower and torque is increased. I started a series to show ways to improve some of the issues that relates to the gbody suspension and frame. Heres the link to the first episode
-ruclips.net/video/3dERAYHmido/видео.html
@@gaspoweredgarage cool. 😎 . There was a show who installed cameras and you can really see the chassis twist. It was shocking. I even remember seeing Grand Nationals engines being strapped down in the engine bay to keep from rising on the strip. Huge straps.
Hard lesson I didn't know anybody better and put $750 in a Yukon posi and ring gear kit for the 7.5 rear when i first got my cutlass
Did the 7.5 rear end survive? what did you upgrade to after the 7.5?
I have 3+ grand easy in my 9 inch. I built an 8.8 before and spent less than $1500 bucks (moser 31 spline axles, 31 spline posi, Richmond gear, Baer brakes). 9 inch isn’t the only way to go.
For all out high performance ford 9inch is the best option. There cheaper options out there but you have to constantly be upgrading the rear end when your power level increases at the same time. The reason i didnt do 8.8 as a option is due to stock needs c clip elimators or cut axle flanges off and convert to 9inch ends so axles don't slide out like chevy rear ends. Glad you found a cheaper option that works for your build.
@@gaspoweredgarage with disc brakes the axles won’t slide out if the c clip fails. There are plenty of 8.8s in high hp builds.
Ford 9inch is the best way to go hands down.
Yep
Nice video sir...I installed a 9in a few months back and love it. Keep up the good work.
Appreciate the praise and glad you liked the video. Any ideas you would like to see in the future on this channel?
@gaspoweredgarage I can't think of any ideas right now but keep doing what your doing.
Appreciate it.
@@gaspoweredgarage us gbody channels need to get together and do something in the future.
I'm game
How much did your 9" rear-end cost after everything? Ready to install brakes included. Nice info in this video. G-bodies for life 💯
At the time I bought it years ago. It probably cost me 1,500 to 1,800 dollars for the housing, axles, and third member. Then the brakes from the junkyard probably about 50 dollars. So under 2000 dollars for my setup.
@@gaspoweredgarage thank you for replying back. Finally got the 9" installed & man what a difference. All motor no brake burn-outs & super strong. G-bodies for life 💯
@@gaspoweredgarageWhat year caddilac was it? i was thinking i could order new set up.
The brake on the 7.5 rear end are from 1979-85 Cadillac Eldorado. Heres a link to another video I go over everything in detail with item numbers. ruclips.net/video/rX6tSloMgiw/видео.html
Definitely appreciate the gems I’m currently at this point in my build is 410’s or 411’s gear ok I’m running 24’s rims
What rpm range does your engine run the best at? Also what transmission are you using? Also what is your torque converter stall speed?
411s but tune it down to a 373 to turn the rims good still
I daily my 86 442 it has the 8.5 in it. And I'm going to switch it out and put a built Ford 9 inch in it but I'm adding 2 inches on each side for frame clearance and putting 18 inch rims on it 9.5 wide in the back and 8 inch wide in the front. The only thing holding me up at the moment is I need a ring and pinion gear and cut to fit 31 spline axles
A ford 9inch housing setup for gbody stock length axles would cleared a 9.5 width wheel no problem with the right backspacing. My gbody has ford 9inch with stock length axles plus 17x9.5 and it clears no problem.
Can’t disagree…9” is the bomb!
But my GN with the 8.5 held my 500 hp forever.
8.5 is a good rear end that can hold good power and put a grand national into the 9's but cost alot in the process.Thats why I go straight to ford 9".
I snagged an 8.5 off craigslist about 10 years ago for $600. Guy posted on Saturday after the banks closed, and said first here with cash gets it. Luckily I had that much on hand.
Thats good. Now that same 8.5 is worth 2000 dollars if you sold it today.
@@gaspoweredgarage Honestly, the number of times I'm going to romp on the gas and beat on my car are minimal. 8.5 rear ends are more efficient than a Ford 9-inch anyway.
1986 Olds442- I've been running the 8.5" 3.73 10 bolt since 1996 when I put a '68 Olds 350 in it. Got to 12.40s with slicks and open headers by 2000. Over 800 passes down the quarter mile and still going strong (streep/strip-driven to the track). I replaced the limited slip diff back in 2007. I suppose it might be around 400HP at the crank. Either I've been lucky or the 8.5" 10 bolt is adequate for 400hp and tolerates drag slicks. Must be part luck because I've also used a turbo 350 with stock components, even the intermediate sprage race, and only broke that once at the track and high gear took a crap once but it was still drivable home. The 9" makes sense with the value of the 8.5" 10 bolt, Im just too lazy at 60 to bother switching it and the drag racing days are slowing down.
Sounds like a good setup for your power level. Thats is enjoyable and fun without needing the upgrade of a ford 9inch. It would be different if you were planning to increase power level enough to justify the need for a ford 9inch to handle the additional power. Then it would be a different situation.
I also have the 8.5 rear in my El Camino
If you can’t afford to upgrade to a 9”, find a wrecked monte SS or GN. And grab the PS box while you’re at it.
I made a video talking about this called "moden car upgrades for your gbody" in the video I talked about Camaro iroc or gta firebird also a good ps box upgrade. Check it out if you haven't already.
I'm waiting on a ford nine inch now💪🏾💪🏾
Good to hear your making the best decision in rear end choice for your car.
@@gaspoweredgarage yes sir👍🏾👍🏾
IM ONLY running about 300hp LS in my Gbody, might Stage 1 cam it but nothing serious,
SO i just need faster gears than stock 2.33 granny gears.
Im told highest i can gear my 7.6 Rearend is about 3.08, that would probly be good enough, any higher then a overdrive tranny will be needed too.
Depending on if this is a daily /gas saver versus fun car changes what you use. If your car is a 3speed automatic use 3.08 or 3.23 for daily(good mpg/good acceleration), fun car use 3.42, 3.55 or 3.73 (bad mpg and even better acceleration). Reason people say don't go more than 3.08 gears with without a overdrive trans is due to rpms you run at high way speeds compared to a overdrive at highway speeds which is lower.
Awesome! 👏🏼👏🏼👏🏼✌🏼😊👍🏼💯
Thank you
Awesome vid
Appreciate it. glad my video was helpful.
Can you explain what LS1 brakes are so I can find them as well? What vehicle did they come from and were they direct bolt on to the ford 9”?
ls1 brakes refers to 1998-02 model camaro and firebird brakes. they were installed on all trim levels so v6 model and v8 model. if you use the factory camaro /firebird backing plates like how i did it they will need to be machined in the center. since the backing plates act as a retainer for holding the axles bearing in place also. if you use aftermarket brackets you would have one for retaining the axle bearing and the second one for the brake caliper and rotor. i go into more details on what parts you need for using the ls1 rear brakes in this video-ruclips.net/video/ezwhuGdWcAE/видео.html.
Georgia running5s all day gbodys all stock weight insides,coupe performance they R7.5 specialists first car went 5:70s name Bo dilly tube it6years ago
nice
Is the ford 9" better than the grand national?
Since grand national rear ends are getting more expensive and harder to find now a days. the ford 9inch is a better option especially if your making high horsepower or your running a manual transmission with a sticky tire at the track. Plus ford 9 inches are cheaper. I have links in the description if your in the market for a ford 9inch to save you money on buying the parts needed on ebay.
Can you daily drive an 8.5???
You can daily with a 8.5 no problem. But when you get to the point where you need to build it to keep it from being destroyed from the power your motor is making if its high horsepower/ torque its cheaper to upgrade to a ford 9inch instead.
@@gaspoweredgarage appreciate it brother 🙏🏽
Your welcome
@@gaspoweredgarage what engine would you recommend if I was planning to LS swap ??
4.8/5.3 if your going to go the cheap and boosted route. 6.0/corvette based ls engine if your going to just do like heads,cam,intake swap.
Nice great info, NICE THANKS...ANY VIDS OR INFO ON THE REAR BRAKE CONVERSION?
Got a video coming up later in December talking about two different brake conversion for front and rear brakes and will be going in depth about both for gbodys.
@@gaspoweredgarage Thanks a bunch and thanks for sharing...New Sub
Your welcome. The ford 9 inch rear end has 98-02 camaro/ firebird brakes. 7.5 rear end has 78-84 Cadillac Eldorado / firebird brakes.
What would you recommend to upgrade the rear end of a 86 Pontiac Grand Prix 3.8L V6?
If your going to upgrade to a bigger motor or higher horsepower option down the road then ford 9inch is what I would recommend. If your keeping the 3.8 and enjoying your car as a daily or weekend car i would put a posi in the 7.5 rear end and a rear end girdle then call it good.
Did the 7.5 to 9in swap require a different length driveshaft?
For my swap I never had a driveshaft so im getting a custom one. But for all other swaps it shouldn't need one different length.
@@gaspoweredgarage ok thank you. I have a 1350 yoke so I’d assume I’ll need the 3r to 1350 conversion i joint but would love if that all I needed.
Definitely will need the conversion ujoint to match up to the ford 9inch. Since gbodys use a smaller ujoint
I have a 85 cutlass .. What about a 96 impalas ss rear end
Here is the list on what is required for the fitment of a Impala ss rear end into your cutlass. Impala ss rear end is to long from the start, it uses different wheel bolt pattern than gbody. Would require cutting / relocating the spring perches and lower trailing arms bracket, and cutting / shortening axles tubes and then buying proper length axles.then if you do all that you might as well upgrade the oem posi third member to handle the power your cutlass is making currently or plans to make in the future. Which then circles back to it would be cheaper to start with a ford 9inch setup for a gbody instead.
Would you have a parts list for rear diff except third member I can choose from there I'm trying to be as budget friendly as possible
Whats roughly your budget and will come up the list later today.
Mmm I'm hoping to be some where in the 1700$ range not including third member if I can spend less hell yeah
From searching around to fit your budget here's what i came up with.
1- Ford 9inch housing and axles setup for 31 spline ranged from $940-$1200 shipped from quick performance racing on ebay.
make sure it has the proper axle ends based on what brakes your going with. if your staying gm based brakes look for one with gm housing ends.
2- rear brakes is next which 98-02 camaro/firebird rear disc brakes is simple and cheap to get from your local junkyard or facebook market/craigslist.
3- to see how the stuff bolts and works with the ford 9inch brake wise i have a series call "better than stock brakes". episode 2 covers the brakes stuff the best for your setup. heres a link-ruclips.net/video/ezwhuGdWcAE/видео.html.
4- Third member will depend on how your setting up your gbody.
Got more photos of the lemans?
What lemans are you talking about?
Whats the stock rear end for a 1985 caprice classic
Cop car caprice / impalas had the 8.5 disc brake posi rears and everything else had a 7.5 non posi drum setup.
@@gaspoweredgarage thanks need to replace rear axle bought a 8.5 28in spline the tip was too big
7.5 should be 26 spline which would have a smaller tip.Your best bang for the buck would be to buy a used whole cop car rear end and convert your caprice to rear disc brakes at the same time. A way to find the rear end at your nearest salvage yard is (www.car-parts.com)
@@gaspoweredgarage thanks💯
What Cadillac did you get the rear brake assembly from?
if your wheel studs are metric 1982-88 gbody use 78-85 Cadillac Eldorado rear rotors. if your wheel studs are sae 1978-81 gbody use 78-81 turbo trans am rear rotors. Rear Calipers from trans am and Eldorado are the same.
I’ve got a dynoed 440hp 490tq stroker I dropped into a monte ss. Recommend going straight to a ford 9?
If it has a stock 7.5 rear end then yes go straight to ford 9. It will be the best decision especially if you race or do burnouts / beat on your car due to the extra power gain over the stock engine. Sell the 7.5 before it grenades itself so it helps fund the ford 9inch.
@@gaspoweredgaragegetting ready to put my Ford 9in in
Thats good to hear. Now you can enjoy the power your motor makes without breaking the rear end.
Are those coilover shocks from autozone any good anybody? I was thinking about putting a pair on the front of my all original 78 Regal Limited to pick it up a little in the front.
They look like coil overs but there a heavy duty shock. I like them and have them on a foxbody cougar and a gbody elcamino. They work great with good ride also.
@@gaspoweredgarage Thanks. I think I'll try a set. Thank you so much.
Forgot to mention they make them for front and rear in that style of shock. So you can use them on all four corners of your regal.
@@gaspoweredgarage Ok. Thanks a lot bro!!!
Your welcome, anytime
Can I use the ford 9” on a Chevy caprice?
Yes especially if your going to be over 300-400 horsepower. If your plans to be under 600 horsepower you could look at your local salvage yard for a police package caprice or impala ss and use that rear end to swap into yours or buy once and get a ford 9inch.
@@gaspoweredgarage i know someone on YT whos making more than that with a small block on nitrous in a box and has the 8.5. he also has a big block box but that also has the 8.5 but that DEFINATELY needs a 9 in and he knows it because ofthe amount of nitrous on the car. neither of those 8.5 are stock axles and they have trutracs
My response was assuming caprice / impala had a 7.5 stock like gbodys cars. then the police or ss package cars had the 8.5. But if they came with the 8.5 from the get go there good for 500-800 depending on if they have aftermarket axles and third member. Big block and nitrous cars are rough on rear ends so they need ford 9inch automatically due to the amount of torque that gets applied to the surface there driving on.
Bueller.... Bueller.... Anyone?
You should bought a mustang
Why?
Stop 🛑 it
Definitely not! GBody for lyfe