borg warner m12

Hmm...  I'm reasonably sure it doesn't spring back, the throttle pulls it back. The cable should be free and real easy to push and pull. If it's not easy to do pinched between a finger and thumb then it's too tight.

I don't see how the cam change could do anything, unless the cable got kinked or installed wrong. Cable should only go on one way though. Throttle pushes the cable in, right? I mean as you increase throttle cable goes in. Sounds like you might have something loose inside the trans (cable could have come loose) or have a sticking valve. Sticking valve would just be coincidence that it stuck when the cam was changed.


Edited by farna - Jun/08/2015 at 6:51am

farna wrote: Adjust as described above. The cable should push IN as the throttle is pressed. When the throttle valve "bottoms out" it will force a down-shift ("kick-down") under a pre-set speed. Can't change that speed. If you make the cable longer it will shift a little faster and harder, but you may find it down-shifts too early going up hills. The cable controls internal trans pressure as well as the "kick-down" operation. Without the cable, or the cable moving freely, reduced pressure will lead to slipping bands and clutches. That means excess heat, which will kill the trans in short order. The slipping doesn't help much either... The M8 is a cast iron heavy trans like the M-11 and M12, just an older version. The M8 was used behind early AMC V-8s, like their 327. It's plenty strong for an SBC. I didn't know anyone ever used a Borg-Warner trans behind an SBC though. Interesting that Checker did! Since many mistake hte AMC 327 for the Chevy, I had to look it up, and discovered it is indeed an SBC. No offense itended...

Frank....Avanti Motors Corporation (another AMC)after 1965 used the "left over" Borg Warner Automatics that were originally put in the Studebaker Powered Avanti's in the 327 and 350 CID SBC Powered Avanti 2's. I have owned several, traded the last one for a 68 AMX, 390, 4 speed car.