Speedometer gear in camaro T5 for 79 MGB speedometer

donfaber · July 01, 2011, 05:46:31 PM

I'm running a Camaro T5 (0.63 5th gear) in a 79 MGB. When I installed the tranny 10 years ago, a speedo gear and spindle (23 teeth black ) was supplied to provide proper ratio for MGB speedometer. WorKed great until last month - now that 23 tooth gear has lost a few teeth. I need a replacement, but don't know where that piece came from! HELP?

ex-tyke · July 02, 2011, 01:45:41 PM

Still available from suppliers - The Gearbox in Detroit for example.....
http://www.thegearbox.org/catalog/item/3819132/3532517.htm

donfaber · July 02, 2011, 06:35:35 PM

Thanks, Graham! You wouldn't believe how hard I've looked.

donfaber · July 03, 2011, 08:08:49 PM

-- moved topic --

donfaber · March 17, 2012, 10:47:46 PM

Car back together and out this spring with 23 tooth driven gear (black) in
Camaro t5 tranny. I've heard this gear "wears out" quickly - even though my 1st 23 tooth gear was in for 8 years, that was still only about 4000 miles. Thinking about going to gps speedometer
- how about a specific list of gps speedos folks have used? Thanks!

ex-tyke · March 18, 2012, 09:38:22 AM

Have you considered changing the drive gear (to less teeth) so that you can use a lower tooth count driven gear?
For example, my drive gear has 8 teeth and driven gear is a 19 tooth that's lasted for years.

Driven gear teeth = [Drive gear teeth x axle ratio x tire rev. per mile] / speedo tpm

roverman · March 18, 2012, 02:17:26 PM

GPS speedo ? Will we still get a ticket with sun spots/lol. ? Boxter S t-axle has no provision for "cable". What are the options ? Thanks, roverman.

flyinlow · March 18, 2012, 05:50:25 PM

Roverman, does the front or rear suspension have ABS sensors?
Or your Porsche tyranny have a VSS?
If you have either you can use the signal from a sensor with most any aftermarket electronic speedo