Another Tranny Swap Question
Thread Starter
Drifting
Joined: Jun 2005
Posts: 1,950
Likes: 498
From: Chino Hills CA
Another Tranny Swap Question
Although, I've become semi proficient at these swaps, I'm pretty clueless as to getting my speedo to read correctly. My '72 has the 3.31 rear end, and a WC T-5 out of a Camaro. My speedo reads about 25% higher than it should. I've heard about external ratio converters that hook up to the cable, but where can I get one? Also, what does it take to change the gear inside the tranny and where can these be purchased. Thanks for any help
Drifting
Joined: Oct 2004
Posts: 1,259
Likes: 7
From: Ontario
Very easy to change the 'drivEN' gear. Just remove the assembly that the cable plugs into(one screw). However if you are so far out that you also need to change the 'drive' gear then the T5 tail end need to be removed since the gear is on the output shaft. It might be doable in the car but likely you would have to drop the trans.
I have seen web sites that will calculate the drive and driven gears that you need but cannot seem to locate any now for the GM T5. Suggest that you do some web searches for that. This is a site for the Ford T5T5 Calc/ For example with 3.55 gears and a yellow drive gear(7 tooth) you would require a 20tooth driven gear.
You can buy all the gears from the dealer.
I have seen web sites that will calculate the drive and driven gears that you need but cannot seem to locate any now for the GM T5. Suggest that you do some web searches for that. This is a site for the Ford T5T5 Calc/ For example with 3.55 gears and a yellow drive gear(7 tooth) you would require a 20tooth driven gear.
You can buy all the gears from the dealer.
Last edited by Retro78; Aug 25, 2005 at 12:35 AM.
Drifting
Joined: Oct 2004
Posts: 1,259
Likes: 7
From: Ontario
Originally Posted by lowbuck72
If I remove the driven gear, do I go to the dealer and get one with 25% more teeth or less teeth?
Calc T5
Using the chart as an example...with 3.55 gears and a yellow drive gear(7 tooth) you would require a 20tooth driven gear. When you take out the spedo adapter on the side of the trans you can look inside to see the color of the drive gear. I do not know what the colors are for GM.
