Which transmission was in the car orginally
Forum: C3 Engines, Driveline and Handling
4 Messages
Page 1 of 1
Sponsored Content
F
Former Member
Send PMHouston, TX - USA
Joined: 2/7/2008
Posts: 93
Vette(s): 1970 454 4 speed A/C power everything else
I just bought a 70 Big block coupe with A/C 4 speed and power everything else. I dont have the car in front of me so I can t look at the build sheet.
The transmission is missing and I'm trying to figure out if it was a M20 or M21, 10 or 26 spline on the input shaft etc
I also dont know the rear end gear.
As far as I can tell there aren't any special performance packages on this car.
Thanks!
The transmission is missing and I'm trying to figure out if it was a M20 or M21, 10 or 26 spline on the input shaft etc
I also dont know the rear end gear.
As far as I can tell there aren't any special performance packages on this car.
Thanks!
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
SPONSOR AD:: (Our Sponsors help support Vette Registry)
Probably a M21 close ratio - 4383 units were sold in 1970 - only 25 - M22 (heavy duty close ratios) were sold - but hey -you never know -
Big Al
apasbigal 2008-02-07 14:08:37
Look in tools tab above - then vette statistics - this may help some
| Standard rear axle ratio | 3.36:1 | |
| Optional rear axle ratio | 2.73:1, 3.08:1, 3.36:1, 3.55:1, 4.11:1, 4.56:1 | |
Also try :http://www.vettefacts.com/
| M1970 m21- 10 spline
1970 m22-26 spline |
|||||||
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
o
Look under the rear in end and get the numbers to see what it was. My 70 is a 3.08
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
Lifetime Member
Moderator
Send PMModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 22720
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
The M22 "Rock Crusher" was only available with the LT1 w/ZR1 package...
Depending on if it has A/C or not, the rear ratios would be:
M20(wide ratio) w/out A/C could have had 3.36(std) 3.08(opt) 3.55, or 3.70
M21(close ratio) w/out A/C could have 3.08, or 3.36
M20(wide ratio) was not available with A/C so...
M21 w/A/C could have only the 3.08
Now ya know!
Depending on if it has A/C or not, the rear ratios would be:
M20(wide ratio) w/out A/C could have had 3.36(std) 3.08(opt) 3.55, or 3.70
M21(close ratio) w/out A/C could have 3.08, or 3.36
M20(wide ratio) was not available with A/C so...
M21 w/A/C could have only the 3.08
Now ya know!
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Be the first to like this post
Sign In to Like this post
Sign In to Like this post
in Forum: C3 Engines, Driveline and Handling
Sponsored Content