2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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need help with install

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Old 12-02-04, 08:19 AM
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Exclamation need help with install

i am putting an S5 motor tranny, wiring into an 88 gtu(gotta love the 430 rear gear...hehe) and i was wondering if the tranny will hook up to the rear end? thanx in advance
Old 12-02-04, 08:22 AM
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The 88 GTU came with a 4.1 final gear, not a 4.3
Old 12-02-04, 08:29 AM
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ah..ok thanx...but wil it work?
Old 12-02-04, 11:19 AM
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yeah, it will bolt in just fine
Old 12-02-04, 11:50 AM
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Originally Posted by Icemark
The 88 GTU came with a 4.1 final gear, not a 4.3
so the turbo and the GTU have the same gear ratio?

I also thought the GTU had a 4.30.

did the GTU have the turbo trans. also?
Old 12-02-04, 05:16 PM
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US-spec 1989-1990 "GTUs" only had the 4.30 rear end option from the factory.


-Ted
Old 12-02-04, 05:31 PM
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yeah... turbos are 4.10 too (i think) and the automatics are 3.90
Old 12-02-04, 05:37 PM
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That would be correct.
Old 12-02-04, 07:03 PM
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Originally Posted by turbo80cid
so the turbo and the GTU have the same gear ratio?

I also thought the GTU had a 4.30.

did the GTU have the turbo trans. also?
All north american spec manual tranny 2nd gen RX-7s (except the 89-90 GTUs model and the 88 convertible) came witha 4.10 rear end.
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