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ls1 t-56 in an 87 GTA

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Old 06-12-2003, 06:26 PM
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Car: 1994 firebird
Engine: 427ci lsx bowtie block
Transmission: tremec t56 micro edged gears
Axle/Gears: Strange dana 60 with racing spool
ls1 t-56 in an 87 GTA

hey i need some info on what i can use and what i can't use from the 2000 ls1 t-56 i have. everyone says i need a new flywheel from an lt1 which is fine but then can i use my new clutch pressure plate and disk from the 2000 ls1 t-56 or do i need boht new ones of those also how bout the hydrolic throwout brearing? from the new ls1 t-56? and do i really need the new input shaft from an lt1 t-56? can't i just use my new ls1 flwheel with new bolt holes to line up with my l98 crank? and then keep eveyrthin from he ls1 t-56???? someone help me out here
Old 06-12-2003, 09:43 PM
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Re: ls1 t-56 in an 87 GTA

Originally posted by polygaryd
hey i need some info on what i can use and what i can't use from the 2000 ls1 t-56 i have. everyone says i need a new flywheel from an lt1 which is fine but then can i use my new clutch pressure plate and disk from the 2000 ls1 t-56 or do i need boht new ones of those also how bout the hydrolic throwout brearing? from the new ls1 t-56? and do i really need the new input shaft from an lt1 t-56? can't i just use my new ls1 flwheel with new bolt holes to line up with my l98 crank? and then keep eveyrthin from he ls1 t-56???? someone help me out here
You'll need to swap the input shaft, swap the bellhousing, use an LT1 flywheel, not sure about the clutch and pressure plate, and learn how to spell hydraulic.
Old 06-13-2003, 12:02 AM
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Is the spline number the same, I thought it was more of a distance issue than the actual input shaft?
Old 06-13-2003, 09:17 AM
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Car: 1982 Z28
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Transmission: T56
Originally posted by Beast5spdGTA
Is the spline number the same, I thought it was more of a distance issue than the actual input shaft?
Don't know, once you get to the distance thing you've pretty much ruled out using the input shaft. Given that McLeod now makes bellhousing adapters which allow the LS1 T56 to be used on a regular SBC the shaft thing may not require swapping it...but there's $$ involved.

In most cases, people end up w/ an LS1 trans because they got a good deal on it. By the time you get done buying all the stuff you need to make it work w/ a regular SBC, you probably spent more than you saved.
Old 06-13-2003, 10:11 AM
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Car: 1994 firebird
Engine: 427ci lsx bowtie block
Transmission: tremec t56 micro edged gears
Axle/Gears: Strange dana 60 with racing spool
ls1 hydrolic clutch with lt1 flywheel

hey first of all i was tired when i posted this article so my speeling can be off. second i need to get a whole new bellhousing with the clutch fork too??? which would mean i cant use my hydrolic throwout bearing either right?? still why can't i just use the ls1 flywheel with new bolts holes drilled in it or have one made with the correct bolt holes. and keep all my ls1 stuff. that way it should be the same length..correct or no?
Old 06-13-2003, 10:29 AM
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Save yourself some time and headaches, sell the LS1 stuff and get the LT1 setup, it bolts in without all the extra cost.
Old 06-13-2003, 07:36 PM
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Car: 1994 firebird
Engine: 427ci lsx bowtie block
Transmission: tremec t56 micro edged gears
Axle/Gears: Strange dana 60 with racing spool
ls1 and lt1 t-56

the ls1 handles more hp and torque... i want the ls1
Old 06-13-2003, 11:35 PM
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Re: ls1 and lt1 t-56

Originally posted by polygaryd
the ls1 handles more hp and torque... i want the ls1
Really? What is the rating for the LS1 version compared to the LT1 version?
Old 06-14-2003, 09:17 PM
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Re: Re: ls1 t-56 in an 87 GTA

Originally posted by kevinc
You'll need to swap the input shaft, swap the bellhousing, use an LT1 flywheel, not sure about the clutch and pressure plate, and learn how to spell hydraulic.
Why are you so harsh on the guy? Not everyone graduates from Harvard with a major in English ya know..
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