Speedometer Drive Gears
Thread Starter
Pro
Joined: Jul 2000
Posts: 653
Likes: 9
From: Ottawa, Ont. Canada
Speedometer Drive Gears
The speedometer drive gear in the transmissions are colour coded to reflect the final gear ratios in the differentials. Would anybody have the list of colour and corresponding ratios.
Also, are these gear interchangeable between different transmissions such as Borg Warner, Muncies and Powerglides. Are these available through most Corvette parts vendors?
Thanks
Pierre G. Joly
Also, are these gear interchangeable between different transmissions such as Borg Warner, Muncies and Powerglides. Are these available through most Corvette parts vendors?
Thanks
Pierre G. Joly
Race Director
Joined: Jul 2002
Posts: 11,593
Likes: 173
From: Clayton NC
Re: Speedometer Drive Gears (Pierre)
Pierre there is a post a little further down that has a lot of good info in it the title is Speedo is off. But here is the info from that post as to the gear sizes..
Ratio_ tire size___ drive gr____ driven gr_ teeth_ color
2.73__8.15-G70__3895494____3987918_18____brown
3.31__8.45-G70__3924098____3987919_19____natural
3.36__8.15-G70__3924098____3987920_20____blue
3.55__8.15-G70__3924098____3860344_21____red
3.70__8.15-G70__3924097____3860345_22____green
3.70__8.45-_____ 3924098____3860344_21____red
3.73__8.15-G70__3924097____3860345_22____green
3.73__F70______ 3924097____3860348_25____orange
4.10__8.15-G70__3924097____3860347_24____yellow
4.11__F70______ 3924097____3860348_25____orange
4.56__8.15-G70__3924097____3860345_22____green*** uses 3890575 adapter
Dave..
Ratio_ tire size___ drive gr____ driven gr_ teeth_ color
2.73__8.15-G70__3895494____3987918_18____brown
3.31__8.45-G70__3924098____3987919_19____natural
3.36__8.15-G70__3924098____3987920_20____blue
3.55__8.15-G70__3924098____3860344_21____red
3.70__8.15-G70__3924097____3860345_22____green
3.70__8.45-_____ 3924098____3860344_21____red
3.73__8.15-G70__3924097____3860345_22____green
3.73__F70______ 3924097____3860348_25____orange
4.10__8.15-G70__3924097____3860347_24____yellow
4.11__F70______ 3924097____3860348_25____orange
4.56__8.15-G70__3924097____3860345_22____green*** uses 3890575 adapter
Dave..
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Re: Speedometer Drive Gears (Pierre)
Pierre,
Please see my post on this subject. We are in the same city. Go to Sunrise Pontiac-Buick-GMC on Bank St. and tell them Paul sent you. They can get the gears in one day and the price will be $5.50-$6.50CDN. They are a corporate sponsor of the Capital Corvette Club and give a substantial discount to Corvette owners.
http://forums.corvetteforum.com/zerothread?id=598778
Please see my post on this subject. We are in the same city. Go to Sunrise Pontiac-Buick-GMC on Bank St. and tell them Paul sent you. They can get the gears in one day and the price will be $5.50-$6.50CDN. They are a corporate sponsor of the Capital Corvette Club and give a substantial discount to Corvette owners.
http://forums.corvetteforum.com/zerothread?id=598778
Thread Starter
Pro
Joined: Jul 2000
Posts: 653
Likes: 9
From: Ottawa, Ont. Canada
Re: Speedometer Drive Gears (paul67)
Dave Paul,
Thanks for the info. I read the previous posting about this and it provides me with the info I was looking for. although it is not specifically mentioned, I take it that all these drive gears for Muncies, Borg Warner and Powerglides are the same.
Paul,
I didn’t know about Sunrise Pontiac-Buick-GMC giving discounts to Corvette owners. I’m in the process of major changes to my ‘56, will need lot’s of parts and will try take advantage of the discount.
Thanks again.
Pierre
Thanks for the info. I read the previous posting about this and it provides me with the info I was looking for. although it is not specifically mentioned, I take it that all these drive gears for Muncies, Borg Warner and Powerglides are the same.
Paul,
I didn’t know about Sunrise Pontiac-Buick-GMC giving discounts to Corvette owners. I’m in the process of major changes to my ‘56, will need lot’s of parts and will try take advantage of the discount.
Thanks again.
Pierre
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Re: Speedometer Drive Gears (Pierre)
Pierre,
I am a former employee of Sunrise and negotiated the discounts on behalf of the Club. But I would not hold out too much hope that many parts will still be available for a 1956....But it's worth a try. Speak with Kevin: he goes back at least to the C2 days. BTW, here are the codes and part numbers for the speedo driven gears.
http://members.core.com/~faldrich/speedo.htm
I am a former employee of Sunrise and negotiated the discounts on behalf of the Club. But I would not hold out too much hope that many parts will still be available for a 1956....But it's worth a try. Speak with Kevin: he goes back at least to the C2 days. BTW, here are the codes and part numbers for the speedo driven gears.
http://members.core.com/~faldrich/speedo.htm
