C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Tremec ???

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Old Jun 21, 2021 | 03:57 PM
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Default Tremec ???

Any c4 converted to tremec ? Thanks.
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Old Jun 21, 2021 | 07:34 PM
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Tell us about your car. Do you have an auto car and want to swap to a manual or do you have a failing ZF6?
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Old Jun 21, 2021 | 08:04 PM
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There are a few. Motivation to change is low, on these here forums, however. If auto, it's financially more prudent to sell, buy a stick. If it's a stick, it's got a ZF6 already, which fits and is better...so....Not an overwhelmingly popular mod.
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Old Jun 21, 2021 | 09:09 PM
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I have an 86 Convertible that the 4+3 was swapped out for a Tremec 5 speed before I purchased it. Only complaint I have about it is first gear acts more like a granny, tops out too soon IMO. About the only other changes I see is there as a Dakota Digital converter was wired into the speedometer to convert the tranny output signal to match the car speedometer. It drives well and fun on the road. If you plan to drag race, not sure it's the best solution due to the gear spacing IMO.

Last edited by hcbph; Jun 21, 2021 at 09:10 PM.
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Old Jun 21, 2021 | 10:46 PM
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Because the transmission supports and is supported by the rear differential through the "C" beam; making it not a simple swap. C beam brackets more often need to custom made vs a off the shelf part.
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Old Jun 21, 2021 | 11:06 PM
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There is a Tremec kit for the 84-88 C4's. Has everything needed, including the bracket for the c-beam

https://shiftsst.com/blog/post/1984-1988-corvette.html

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Old Jun 21, 2021 | 11:23 PM
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Originally Posted by hcbph
I have an 86 Convertible that the 4+3 was swapped out for a Tremec 5 speed before I purchased it. Only complaint I have about it is first gear acts more like a granny, tops out too soon IMO. About the only other changes I see is there as a Dakota Digital converter was wired into the speedometer to convert the tranny output signal to match the car speedometer. It drives well and fun on the road. If you plan to drag race, not sure it's the best solution due to the gear spacing IMO.
Not sure if you have the 3.27 1st but the later offering TKX seem to have a better gear spread.
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Old Jun 21, 2021 | 11:47 PM
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thanks guys for all the info.
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Originally Posted by Kevova
Because the transmission supports and is supported by the rear differential through the "C" beam; making it not a simple swap. C beam brackets more often need to custom made vs a off the shelf part.
No, off the shelf here, the one I used .. Not cheap $300 http://www.brphotrods.com/
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