Conversions & Swaps LSX Engines in Non-LSX Vehicles
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ls1 and turbo 400??

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Old May 11, 2006 | 05:12 PM
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Default ls1 and turbo 400??

will an ls1 match up with a th400 transmission?
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Old May 11, 2006 | 05:14 PM
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From: Little Austin
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Short answer...yes...

There are some converter alignment issues that must be dealt with.

Andrew
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Old May 11, 2006 | 05:17 PM
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what kind of issues...is there much cost involved, time, etc...?
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Old May 11, 2006 | 05:19 PM
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From: Little Austin
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Your on your own from here. I suggest doing a search. There are several guys running TH400 in their 4th gen F-bodies.

Andrew
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Old May 11, 2006 | 09:50 PM
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From: merrick new york
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call ati they make a flexplate with spacer setup for it, i just got one for my th350 everything lines up great
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Old May 13, 2006 | 06:00 PM
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From: the not so stock tribe
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it will bolt up except for one bolt hole.
the issue they are talking about is that the old style converter nose doesent extend long enough to fully seat in the crank/flexplate. there are 2 ways to fix this:
1- get a spacer from gm that bolts between the nose of the converter and the flexplate.
2- if you're ordering a new converter specift its for an LS1 and an old school tranny , and they'll make you a converter with a longer nose.

hope this helps
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Old May 14, 2006 | 09:58 PM
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From: Lawrenceville, GA
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It will bolt up and is a great mod for drag racing, but the gas mileage is reaaallllly bad if you drive it on the street.
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Old May 16, 2006 | 07:05 AM
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Get a torque converter spaced out for the combo LS/TH400/TH350.

Or If you got a standard length shaft converter, you need a spacer same as used on the trucks PN 12563532 (Crank spacer).
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