General Motors transmissions
(→4L80E) |
(→4. Six Speed) |
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== 4. Six Speed == | == 4. Six Speed == | ||
| + | GM used three basic 6 speed manuals over the years. The ZF S6-40, the Borg Warner/Tremec T56, and the New Process/New Venture NV5600 in trucks | ||
| + | '''German ZF S6-40''' Starting with the 1988-96 Corvette, a German ZF 6-speed was used, designated S6-40. It was stout and reliable, but its limited use and short production run didn't support wide aftermarket solutions. In fact GM didn't even stock service parts for the transmissions, instead opting to provide remanufactured units instead of repairing them. Although it ended up costing GM less in the long run, it was a concept not warmly received by the public. Early models were rated for 400 ft-lbs, and later models were rated to 450 ft-lbs. ZF 6-speed ratios are as follows: | ||
| + | |||
| + | Reverse - 2.50 | ||
| + | First - 2.68 | ||
| + | second - 1.80 | ||
| + | third - 1.29 | ||
| + | fourth - 1.00 | ||
| + | fifth - 0.75 | ||
| + | sixth - 0.50 | ||
| + | |||
| + | And exploded view of an S6-40 transmission: | ||
| + | [[Image:http://i162.photobucket.com/albums/t264/curtis73/explodedZF.jpg]] | ||
== Overdrive Units == | == Overdrive Units == | ||
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