Which transmission?
Thread Starter
2nd Gear
Joined: Aug 2006
Posts: 2
Likes: 0
Which transmission?
Does anyony know which 4-speed manual transmission came in a '79 Vette? Also the ratios for trans and rearend? A friend just bought a '79 with a 383 stroker and a blower. He's wondering how the trans and rear will hold up.
Thanks,
Rob
Thanks,
Rob
Le Mans Master
Joined: Jul 2005
Posts: 5,752
Likes: 4
From: Austin Texas
Originally Posted by rob67gmc
Does anyony know which 4-speed manual transmission came in a '79 Vette? Also the ratios for trans and rearend? A friend just bought a '79 with a 383 stroker and a blower. He's wondering how the trans and rear will hold up.
Thanks,
Rob
Thanks,
Rob
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Originally Posted by Kalway
I believe they had an M-22 and they hold up to the power pretty well. However, sticky tires and a hard launch will tear the rear end up pretty quick.
Account disabled by user request 5 Jan 09
Joined: Jan 2005
Posts: 261
Likes: 1
M20 was standard
M21 (optional with L82 350/225hp engine only)
M20:
1st=2.85
2nd=2.02
3rd=1.35
4th=direct
M21:
1st=2.43
2nd=1.61
3rd=1.23
4th=direct
Rear:
3.36 code OM
3.55 code OH
3.70 code OJ
M21 (optional with L82 350/225hp engine only)
M20:
1st=2.85
2nd=2.02
3rd=1.35
4th=direct
M21:
1st=2.43
2nd=1.61
3rd=1.23
4th=direct
Rear:
3.36 code OM
3.55 code OH
3.70 code OJ
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Thread Starter
2nd Gear
Joined: Aug 2006
Posts: 2
Likes: 0
Thanks for all the help! I'll get him to check the vin# and also the guy he bought it from to see if any mods were done to the trans or rear. I also just found an old chart I had with pics to help identify transmissions.
The engine is only running about 4 pounds of boost, so we think around 500hp and Michelin street tires.
Thanks again,
Rob
The engine is only running about 4 pounds of boost, so we think around 500hp and Michelin street tires.
Thanks again,
Rob
Drifting
Joined: Jul 2002
Posts: 1,943
Likes: 1
From: Rosemount MN
'79...Only 27 years to modify the car...hmmm wonder what transmission it has.
My '79 came with a ... surprise... Muncie M-22
Also 4.11 differential gear ratio, neither was an option in '79.
Get under the car and look at the transmission, the cover on the driver side will tell you Muncie or Borg-Warner.
Rounded bottom side cover held on with 7 bolts is a Muncie, flat bottom side cover held with 9 bolts is a B-W.
Check the passenger side for a casting number, if you post that, someone will have the resources to tell you what year it was made and what the original gearset was. But any Muncie can be turned into an M-22, just drop the money for the gearset.
My '79 came with a ... surprise... Muncie M-22
Also 4.11 differential gear ratio, neither was an option in '79.
Get under the car and look at the transmission, the cover on the driver side will tell you Muncie or Borg-Warner.
Rounded bottom side cover held on with 7 bolts is a Muncie, flat bottom side cover held with 9 bolts is a B-W.
Check the passenger side for a casting number, if you post that, someone will have the resources to tell you what year it was made and what the original gearset was. But any Muncie can be turned into an M-22, just drop the money for the gearset.