Premature Transmission Failure

[RETed]

The consensus seems to be that non-turbo 13B putting down close to 200hp at the wheels will shorten the life of the (FC) non-turbo transmissions.
200 at the wheels is typically 150 lb-ft at the wheels...
You're at this level right now...and then some.
So, with the non-turbo transmissions, it's no surprised you're killing them.

As for the turbo transmissions...
Hard to say...
Used units are not a very good baseline - same goes with the non-turbo transmissions.
To have good data, the transmissions need to be inspected and rebuilt.
Even a turbo trans with a problem area internally will let go quickly.
Did you tear down the turbo transmissions to verify it was the bearings / synchros that were damaged?

I don't think you mention what kind of clutches you're using?
Unsprung, puck clutch disc can cause damage unless you're very good as synchronizing your shifting.
Speaking of shifting...bad, slopping shifting can also damage transmission quickly.
Do you rev match often?
How about on the downshift?
What kind of fluid are you running in them?


-Ted