scidav87

iTrader: (16)

Got my T56 apart for a 30 spline mainshaft conversion. Tranny has 107K, bought the car with 97K, and still shifted fine...SO how do you tell if I should install new sychros??? I don't wanna put the thing back together and only go 2K miles and it start grinding. But I also don't wanna spend $300 on synchros that my not be needed. THANKS!!

wrencher

iTrader: (2)

Service manual download for the trans is in the sticky section....

85MikeTPI

iTrader: (9)

http://www.transmissiondigest.com/te...oStandards.htm

Basically you completely clean and dry the friction material and steel rings and mark the rings with machinist dye. Press and Rotate the friction ring against the marked steel ring/surface and the dye should be completely removed.

Remember to re-soak the friction rings with ATF before reassembling.

http://www.eecis.udel.edu/~davis/z28...772_large.html
http://www.eecis.udel.edu/~davis/z28...774_large.html
http://www.eecis.udel.edu/~davis/z28...775_large.html
http://www.eecis.udel.edu/~davis/z28...776_large.html
http://www.eecis.udel.edu/~davis/z28...777_large.html

Are the tests on my SSR hybrid trans. One was replaced.

BlackScreaminMachine

iTrader: (17)

IMO they are a wearable item and should always be replaced on rebuilds. Those generally are the first things to go when there is an issue. IF the trans was a fresh rebuild and it was a different issue, that is one thing. 107k..... Dude, spend the money.

85MikeTPI

iTrader: (9)

In general I agree.. But since you don't know the complete history of the trans, the synchros may only have 10K on them.
(The late model triple/double cone synchros wear less, tend to have fewer miles, and are 3x more expensive, but I know this is not the OP's situation.. )

If you are paying someone to rebuild, always do the new parts as the labor will offset the parts. YMMV

scidav87

iTrader: (16)

Fantastic. Thanks for the reply.