Re: [A/S] Chevy Transmissions for Towing -Continuing the Discussion

["Jim Nasium" <flatt@xxxxxxx>]

The 3/4 ton trannie is a GM Catalogue designation -MT1-  aka 4L80E.  (like a
TH400)
Heavy duty drums and servo.  Different oil flow characteristics.  Much
stronger trannie.
Electronic lock-up torque converter in 4th gear (OD).

The 1/2 ton trannie is a GM Catalogue designation -MD8- aka 4L60.  (old)
700R4.  (like a TH350)  It is not a very strong trannie by design.  There
are kits to beef them up, stronger bigger servo and larger drums, but to
have it done at a trans shop is about $1,500 to $1,700.   These trannies,
when used for towing, create higher temperatures, and suffer pre mature
wear, etc. etc.

The 3/4 ton unit is a stronger unit also, bla bla bla, all found in the shop
manual available from the dealer on CD.  (NOT a p.o.s. Chilton or 'back
yard' mechanic, manual)

There use to be a listee who rebuilt ### of these units.  I'm sure he can
explain the oil flow / shift characteristics, if you need.

--== KIMM ==--