LT1 vs. LS1 T56
06-03-2006, 04:58 PM
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LT1 vs. LS1 T56 Whats the difference between the LT1/LS1 6 speed transmission? I know the obvious bell housing, but is there anything else? Gear ratios, anything? If I found an LT1 t56 could I just swap bellhousings and bolt it up to my LS1 or is there more to it??
06-04-2006, 06:22 PM
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other than that i dont think there is that much of a difference because i did a A4 to M6 conversion and almost bought a ls1 T-56 to convert the input shaft and buy a bell housing because i couldnt find a LT1 T56 but i found one at the last minute
06-05-2006, 01:24 AM
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I'm thinking the only other difference might be the place where the slave cyl. bolts to the LS1 tranny/ and the throwout bearing fork bolts to the LT1 tranny. Do you by chance know how much it would have costed to for the right input shaft??
06-05-2006, 08:13 AM
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A search would have gotten you a quicker reply. The only way this swap is reasonable ($$$ wise) is if you have a bad LS1 unit on hand and exchange the front adapter, bell. & input gear. This assumes that the input gear is still good. It also reqiures you to re-shim the front bearings( requires a very large shim pack).
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06-06-2006, 06:47 PM
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There are some differences throught the years in gearing but not a whole lot, the later years got an increasing in torque rating by using a less aggressive 1st gear and also came with a .50 overdrive for even better mileage. Mine for example does not have that OD it has a .68 I think. But my first gear is steeper. Something like a 2.95 . The differences are not a big deal tho, altho I do think there is one to be considered the weakest due to an even steeper 1st gear I think.
