Ring and Pinion Swap
Thread Starter
Racer
Joined: May 2017
Posts: 452
Likes: 136
Ring and Pinion Swap
My '94 C4 Convertible is fun to drive but with it's 2.59 gear just doesn't have the "Zip" I wish it had. I'm considering changing to a 3.54 or 3.73 set up for the Dana 36. Are there any issues I should be aware of other than the obvious speedometer gear change ?
Thanks
Thanks
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
You will need a tune to have the transmission shift correctly and to fix the speedometer. The transmission is controlled by the computer so it will not shift correctly if you just add in a speedometer frequency converter to fix the speedometer reading. It will rev too high between gear shifts.
Thread Starter
Racer
Joined: May 2017
Posts: 452
Likes: 136
You will need a tune to have the transmission shift correctly and to fix the speedometer. The transmission is controlled by the computer so it will not shift correctly if you just add in a speedometer frequency converter to fix the speedometer reading. It will rev too high between gear shifts.
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Get the software and hardware to do it yourself. On the software I use "Tunercat" there is an "easy button" that allows you to correct for the speedometer error and then automatically adjust the transmission tables at the same time. If the gears are the only change then that is what I would do.
Thread Starter
Racer
Joined: May 2017
Posts: 452
Likes: 136
Get the software and hardware to do it yourself. On the software I use "Tunercat" there is an "easy button" that allows you to correct for the speedometer error and then automatically adjust the transmission tables at the same time. If the gears are the only change then that is what I would do.
Can you recommend a source for "Tunercat"
Thanks
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Last edited by bjankuski; Jun 1, 2017 at 08:52 AM.
Thread Starter
Racer
Joined: May 2017
Posts: 452
Likes: 136
Safety Car
Joined: Sep 2001
Posts: 4,157
Likes: 554
From: Glenbeulah Wi
Count the pins but I believe all corvette's are the 16 pin new style connector. If you buy the Y-cable it will have both style connectors so it will work in all OBD1 1994 or 1995 cars from GM (Connector wise).
Last edited by bjankuski; Jun 1, 2017 at 09:19 AM.
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