I'm convinced that my rear end gears have been changed as my speedo is underreading and I've eliminated everything else. I've looked at the article in the tech section but an not completley sure how to change the gears.

The article refers to 2 gears, the drive gear and the driven gear. I presume that these are both located in the speedo itself?

I have the 145mph speedo, where are the gears located and how do you get to them? Is changine the gears a fairly easy job?

Thanks for the time

Robert

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1987 IROC-Z Auto (LB9)
Black/grey interior with the stance of a streetfighter
I like to think of her as Arnold Schwartzeneger in a dinner suit

Mods
Custom exhaust. 4 Inch pipe from the headders all the way back to a single muffler at the rear. No Cat. K&Ns, AFPR and Air foil.

Future mods:
Cam change
New torque converter
New heads (maybe corvette L98)
Strut brace
Sub frame connectors
Ram Air

Current G-Tech times
0-60mph 6.26 seconds
1/4 14.74@100.2mph

Check out this link. It should answer your question.

http://sethirdgen.org/vss.htm

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1992 Z28 (305) TPI.
160' stat, Accel 8mm, Accel Cap & Rotor,
Flowmaster, high-flo cat.
700R4 3.73's HD Zexel Torsen