Need speedo gear help!
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 1,090
Likes: 8
From: Indianapolis Indiana
Need speedo gear help!
I've changed my '68 roaster, 327/350hp, 4 speed manual's diff from a 3.36 to a 4.11. To correct the speedo I've been told that I need to get an orange gear, GM part #3860348.
1. Does this sound correct or how can I verify this?
2. Of course that part is discontinued, any suggestions where I can find one?
Thanks
1. Does this sound correct or how can I verify this?
2. Of course that part is discontinued, any suggestions where I can find one?
Thanks
Last edited by ndirishr1; Jun 7, 2011 at 01:41 PM. Reason: sp
Le Mans Master
Joined: May 2002
Posts: 5,086
Likes: 786
From: Lebanon Township New Jersey
Zip sells the speedo gears. If your speedo was right before then you want a gear with 4.11/3.36 = 1.22 times the number of teeth on the orginal gear. The bigger gear will slow the speedo reading down. Select it by the number of teeth, not the color.
Pro
Joined: Feb 2008
Posts: 556
Likes: 13
From: C3 Forum, Colorado
Fwiw
Here's a site that may be of some help to you.
http://www.thegearbox.org/catalog/it...82/3547889.htm
http://www.thegearbox.org/catalog/it...82/3547889.htm
