Muncie 4 Speed Mainshaft Disassembly Hack
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- Опубликовано: 10 мар 2020
- A quick easy way to disassemble a Muncie 4 speed mainshaft without damaging the speedometer gear when rebuilding your M20, M21 or M22 4 speed transmission.
Bearing Splitter: amzn.to/2wPjocZ
Hydraulic Press: amzn.to/2vVYU2k
My Store: www.5speeds.com/cart 
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Amazing how I rebuilt these in my garage as a 18 yo kid with no press.
But I was doing motorcycles at 13yo much more complex.
Miss those days.
Nice work Thanks
I just wanted to say thanks to your videos I managed to first fuck up a transmission that probably would've functioned, then proceeded to make said transmission into the BEST transmission I've ever had in under a week - mostly waiting for parts - Your videos have been helpful, informational, and have helped erase the fear of tearing apart a transmission to fix it. Thank you for everything you do and keep it up! You're one awesome guy.
Wish these videos were around 40 years ago
57000 subs, as usual people with valuable info and knowledge to share don't have the sub count they deserve
If more people would share my videos that would help. But they don't.
Thanks man. You’ve helped me so much with transmissions over the years. I really appreciate you and your work.
Well done Paul ! I pay close attention to what you put forth. Thanks for taking the time to put this out there.
Thanks Paul for the bearing splitter info.
Larry
Your videos, book and parts allowed me to first time build my M20 with confidence. Your tutorials never get old, love watching them. Thanks again!
Excellent video! I always enjoy watching your Muncie videos. Help me keep my old muncie transmission working like a fine watch.
Like aways making it look easy. Great clip.
you are a gifted teacher...well done
I love the way you work and teach, nobody compares to you, Thanks from Rick, can't wait to get my quote on the super T-10 for my 62 impala ss
I have a 1969 Muncie I'll try to rebuild eventually. I don't know if I have to press the 3rd gear out yet but at least there's a video on how to do it. Between the book and the videos I have no doubt I can do it. Invaluable information between the 2. Keep up the GREAT and informational videos.
Just minutes ago I was wondering how I can remove the gears. Now I know, thanks a lot!
Another excellent video.
Thank's Paul, another great video. You always explain everything very well and your parts are always top notch, just like your videos are !!! Thank's again !
Thank you. More and more pro builders are using the Super661 brand of parts
I enjoy your video's, you are a craftsman.
Outstanding educational video.
Nice video. Love the book! Good thing the pages are somewhat gear oil resistant.
Allways veary well said and done 👍🙌
Love the close attention you pay to Muncie's. My saginaw 4 speed mainshaft hack ,7075 vise jaws in a big swivel jaw turn it so you can clamp the assembled mainshaft /input straight up and down with the end of the main butted on the bench heat the case drop it down slide the barring down the input >and in the case the case dosent have to be glowing hot for this to work. Try heating the case and the old barring
just got an 2.85 1st saginaw and its close to a z gearset in ratio's so I'm gonna try it out and live with it a while, with a little less power and axle and see how i like it. But ya finding hubs was a concern and hubs that no matter how you clock em" on the shaft or the slider just for a burn out machine somthing that will last the rest of my life early 70"s trans-am or firebird BOP some cominality at the fuel line/headpipe/ bellhousing shaker hood pie in the sky till I get some hubs/shafts/gears/kit thanks paul for keeping me headed in the right direction on this
Good stuff
Nice!!
keep it up very inspirational
Thank you
I put a small trash can lined with rags underneath the press plates to catch pressed/falling components.
Oh Its Thanks TO YOU !!1
Pleasure too watch !!! Great video/great info. Thanks !!!
Paul... I recently rebuilt a Model A Ford 3-speed and a '48 Ford pickup 3-speed transmission. The toughest part of both jobs was getting the snap rings out. I noticed in this video that you have much better snap-ring removal tools than I do! Can you recommend any particular tools for this task? Thanks. Keep the videos coming!
Check out Wilde tools on Amazon
@@GearBoxVideo Thanks for pointing me in the right direction Paul! Cheers!
My narrow tip circlip pliers are from Snap-On. My wide tip ones are Craftsman. Don't know if the Craftsman ones are still made. Certainly the Snap-On ones are.
Do you have any videos of an R155 2wd or whatever would be similar?
This is the only one. If they come in my shop I do a video
Great video! Do you happen to know where I can source a retaining ring for a 6306N bearing? I can’t seem to find a definite part # for it.
For what application? Internal? External? Be specific
@@GearBoxVideo it’s an external constant section 72 mm ring that sits in the groove of the ball bearing on a main input shaft. I’ve found parts # such as SR-72, SP-72, CBS-72 that seem to work but can’t seem to source any, at least not in the USA
I can look if I have some in the shop. You can get them, but they would be in bulk. Email me at support@5speeds.com
Need a video on Subaru 6 speed manual transfer STI Boxes
Why are you asking this on a Muncie specific video?
I wanted to follow up on your point with the synchronizer springs; can they actually come “loose” during operation? What happens if that happens?
I wonder the same thing. The spring closest to 4 gear in my transmission seems to be a little bit short, it will only hold two keys correct.
Paul, what did you use in between the press and the mainshaft? When you pressed off the 3rd gear i saw a rod about the same diameter as the mainshaft. Just curious what it's made of and maybe where to get one in my area. I'm sure you've had it for years since you dismantle mainshafts daily with your eyes closed.
Just some old aluminum round stock I cut down to work for various common jobs
@@GearBoxVideo Additionally, do i need a bearing splitter that spreads to 9 inches? I have one that 1/2" to 4 5/8". Is that sufficient? If anything I can take the bearing splitter apart and assembly is around the mainshaft when I need it to be in order to press off the gears. LMK. Thanks for always taking time to answer.
I have to run the torque lock sliders behind my BB Chevy or it wont stay in any gear under heavy pressure.
Usually it is because the synchros were sloppy or engagement teeth are worn on the gear. It does happen but not often enough to ruin a build with locking sliders.
Wow good to make contact. I'm australian and spent over 10 years in the industry. Do you get involved in all manual gearboxes or just American ones ?
Depends on what comes in the shop. I did full service rebuilding for a long time for foreign and domestic transmissions and dealerships. Now pretty much just parts. However I would love to get my hands on some Australian Holden cast iron 4 speed units
@@GearBoxVideo interesting you should want 70s to 80s holden 4 speeds. I have a complete one in my shed and numerous used parts. They aren't a very good box with lots of issues. Their syncro action is heavy, wear out the cluster bore and input shaft spigot hard surfacing, break the 1-2 syncro hub circlip, and even occasionally seize 1st gear on the mainshaft. Their external shifters aren't durable and need metal bits to make them more reliable. Can send a photo if what I have if you like. Marty
Im gonna start to disassembly my first Muncie and freshen it up 1968 M21 close box longshaft Pontiac, let you know how this goes !
Keep me posted.
@@GearBoxVideo YES !! THANK YOU !!
@@GearBoxVideo GREAT VIDEOS !! got my M-21 all apart ,cleaned and inspected in just a few hours!!! never ever did a 4-Speed!! now how do I get in touch with you to buy the correct and quality parts to put this together?
End thrust "loads" the bearing hard against the c clips. By driving or pressing the bearing away from the clip, the clip becomes loose.
Not all the time because these clips are selective fit and often times they are tapped in place. Although the factory shouldn't do that, they do. You can try and punch the bearing away from the ring to try and loosen it up. With out the hack of leaving the speedo gear in place you would be able to remove the reverse gear and they try to press it all forward again. As mentioned we use new snap rings...
Are there faceplate engagement gear sets available for the Muncie?
Nope
@@GearBoxVideo I wan't to give your reply a thumbs-down because they're not available. But I really appreciate the response. Thanks.
I live in Socal I have a T56 that needs its 5th and 6th gear repaired. It slides off its main shaft. I know a shop in Texas can repair the shaft anyone in California do the same?
Not that I know. Best place is liberty's gears in Michigan
And Dude, You really need to check your website, I just tried to order a small parts kit and other couple things and it wont let me check out because it wont let me pick a delivery type? was logged in and everything.
You enter your address 1st. We get orders every day.