Tom Miller
Well Known Member
A friend of mine that rebuilds transmissions(Vintage Powertrain) in Saline Michigan, called me this morning and asked me if I knew when or why Chevy went to the Muncie?
The only reason that came to my mind is that I believe GM owned Muncie, whereas they were "sourcing" 4 speeds from Borg Warner, so it was probably cheaper to go with their own Muncie trans.
I believe I read somewhere that at some point during 1963 production, the trans vendor switch happened?
My friend Brian has a September 62 T-10, so this points to early model year production.
He has found that this particular trans has some 1963 only features/components such as, small 4 1/4 bearing support/register which would need a bell housing with smaller than the typical 4 5/8 I believe is the more common size.
There are also some different bearing sizes inside, and bearing retainers, etc. that are different for 63 only.
His other question was, did they switch for vendor reasons, or did the High Perf solid lifter & Z11 cars get the T-10, and lower perf(340hp409's & 327's) get the Muncie??
Also, the trans he has is cast " High Perf", and has a cast bowtie on tail housing. There are also a couple more stampings on it, and maybe a partial vin?
Thanks guys
The only reason that came to my mind is that I believe GM owned Muncie, whereas they were "sourcing" 4 speeds from Borg Warner, so it was probably cheaper to go with their own Muncie trans.
I believe I read somewhere that at some point during 1963 production, the trans vendor switch happened?
My friend Brian has a September 62 T-10, so this points to early model year production.
He has found that this particular trans has some 1963 only features/components such as, small 4 1/4 bearing support/register which would need a bell housing with smaller than the typical 4 5/8 I believe is the more common size.
There are also some different bearing sizes inside, and bearing retainers, etc. that are different for 63 only.
His other question was, did they switch for vendor reasons, or did the High Perf solid lifter & Z11 cars get the T-10, and lower perf(340hp409's & 327's) get the Muncie??
Also, the trans he has is cast " High Perf", and has a cast bowtie on tail housing. There are also a couple more stampings on it, and maybe a partial vin?
Thanks guys
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