M20 rebuild
Thread Starter
Intermediate
Joined: Dec 2017
Posts: 32
Likes: 3
M20 rebuild
Members, looking for someone to send/take my m20 matching numbers trans to. Shifts great, quiet, no issues other than leaks and it sounds like the front leak may be coming from the countershaft. It would need to be bored and bushed if that is the case. Any info would be appreciated.
Thanks for your help.
Thanks for your help.
Le Mans Master
Joined: Mar 2004
Posts: 7,502
Likes: 1,510
From: Little Rock AR
I am not sure anyone around here close does that, but I will ask around. Need to go to the machine shop again in a few days and those guys might be able to help. I will post back later.
Matching numbers aside.....Last time I needed a case I went with a Supercase from Paul Cangialosi at 5speeds.com Comes with a plug for the end of the countershaft so leaks are gone. Maybe save the numbers matching case and run the Supercase?
-Mark.
Matching numbers aside.....Last time I needed a case I went with a Supercase from Paul Cangialosi at 5speeds.com Comes with a plug for the end of the countershaft so leaks are gone. Maybe save the numbers matching case and run the Supercase?
-Mark.
Racer
Joined: Jan 2008
Posts: 295
Likes: 58
From: Arvada Colorado
The Supercase has slightly different dimensions than the stock case. That means that if you use it, the shifter will have to be adjusted. Not a big deal but something to be aware of. I suggest taking the guts out of the transmission and just sending the case. The case is fairly light weight. Send the case to Paul. Either way, you will still need to take the transmission apart. Paul has videos that show how to do this. It is fairly simple.
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Le Mans Master
Joined: Mar 2004
Posts: 7,502
Likes: 1,510
From: Little Rock AR
The Supercase has slightly different dimensions than the stock case. That means that if you use it, the shifter will have to be adjusted. Not a big deal but something to be aware of. I suggest taking the guts out of the transmission and just sending the case. The case is fairly light weight. Send the case to Paul. Either way, you will still need to take the transmission apart. Paul has videos that show how to do this. It is fairly simple.
FWIW - I did not need to make any adjustments to use the Supercase along with the balance being factory pieces. It all went together and worked without a hitch.
Is my vette stock?? HAHA
Joined: Oct 2015
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From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
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You can do the labor yourself. Its quite easy and I learned alot about my tranny doing it. And you can check to see if the hole is worn out.
Check you tube for Pauls muncie rebuild videos. THeyre very informative. You can also get parts from thegearbox.org but Pauls prices are sightly better
Check you tube for Pauls muncie rebuild videos. THeyre very informative. You can also get parts from thegearbox.org but Pauls prices are sightly better
Last edited by Rescue Rogers; Nov 26, 2018 at 09:10 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Call Paul at 5speeds.com. He'll tell you what your best choice is in getting that machined and ringed or welded and redrilled. If he can fix it then you can rebuild it yourself. Luckily my 68 M21 was in good shape. I'm converting it to a m20 this winter to mathc my 3.55 rearend. I have a 63 m21 which has the 7/8 pin so I may get rid of the case and go with a supercase and buiild a M22 wideratio or just rebuild it as a M21 incase I find a 3.70 rear some day.
Last edited by Rescue Rogers; Nov 26, 2018 at 09:58 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,222
Likes: 9,359
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
Oh ya, I agree. I'm resealing my tranny and motor nice and tight this winter. I missed a track day last fall due to "fluid leaks".
I got the power steering dry last summer, so I'm getting there. Good luck!
Scott
I got the power steering dry last summer, so I'm getting there. Good luck!
Scott