1980 4-speed
Melting Slicks
Joined: Sep 2004
Posts: 3,223
Likes: 666
From: Northeast
Only one I could find, if it is the original transmission. Wide ratio 2.88:1, 1st gear.
http://www.pontiacpower.org/BW.htm
http://www.pontiacpower.org/BW.htm
Last edited by BKarol; Aug 21, 2014 at 08:36 PM.
Le Mans Master
Joined: Sep 2002
Posts: 5,236
Likes: 898
From: Myrtle Beach SC
You may be referring to the three used in 78-79 but by 80 only one was installed when requested.
www.hunt4cleanair.net/Articles/fourspeeds.pdf
www.hunt4cleanair.net/Articles/fourspeeds.pdf
Le Mans Master
Joined: Oct 2007
Posts: 7,444
Likes: 970
From: Tennessee/Rhode Island
You may be referring to the three used in 78-79 but by 80 only one was installed when requested.
www.hunt4cleanair.net/Articles/fourspeeds.pdf
www.hunt4cleanair.net/Articles/fourspeeds.pdf
the 78-79's had 2 manual tranny's for the L-82-wide ratio and close ratio. The L-48's had only a wide ratio and it was different from the wide ratio in the L-82-not as strong as the L-82's wide ratio.
Drifting
Joined: May 2005
Posts: 1,968
Likes: 44
From: East TN
I think the confusion is with some sites listing 2 manual transmission options for 1980, the MM4 wide ratio, and an optional M21 close ratio. http://www.motorera.com/corvette/1980/vet80.htm
As far as I know, only the MM4 was offered for 1980.
As far as I know, only the MM4 was offered for 1980.
Drifting
Joined: May 2005
Posts: 1,968
Likes: 44
From: East TN
In 1980 the manual trans used was a Borg Warner Super T10 with an aluminum housing for weight reduction, which was it's weak point. Okay, for the stock engine though.
Le Mans Master
Joined: Oct 2007
Posts: 7,444
Likes: 970
From: Tennessee/Rhode Island
http://www.pontiacpower.org/BW.htm
All 74-81 corvettes with a manual transmission had an aluminum casing-wide ratio or close ratio. The stock close ratio and wide ratio with the 78-79 L-82's is good for about 350 Gross HP, more HP as long as you don't drop the clutch at 4,000 RPM! The wide ratio manual used with the L-48 was much weaker than the wide ratio used in the L-82's.
Last edited by jb78L-82; Aug 24, 2014 at 01:31 PM.
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Le Mans Master
Joined: Oct 2007
Posts: 7,444
Likes: 970
From: Tennessee/Rhode Island
This website is the best I have found and CORRECT, forget the others:
http://www.pontiacpower.org/BW.htm
http://www.pontiacpower.org/BW.htm