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Nice to see HP numbers from your 396. I am almost done with a 383 solid roller with similar cam specs but more compression. I would be happy to see 450rwhp on mine. I should have it on the road in December.
I have had 4 cars with the T56 and never liked the way they shifted. Everyone of them I have had problems with and I bought 3 of the 4 cars new too. The ZF is the best manual tranny I have had. It is so much easier to shift and never had a problem with it.
Anyone know if the T56 ever underwent testing like below? (taken from ZFDOC's site)
DURABILITY:
The ZF S6-40 test program for design acceptance for release into production was defined by General Motors Uniform Test Standard (GMUTS) R15-6. This involved 15,000 miles of full-throttle up-shifts at engine redline and downshifts to redline. This was done mostly up and down a 7.2 percent grade on the GM Proving Ground In Milford, Mich., and included
wide-open-throttle runs uphill in reverse!
Another test involved 200,000 highway and proving ground test miles, while still another test involved about 80 hours of high-speed testing on various racetracks and at the GM Desert Proving Ground in Mesa, Ariz. This was followed up by a thousand miles of testing on the high banks at Talladega Super Speedway in Alabama.