Camaro Research Group Discussion > Originality
Speedometer Gear Reduction Units
JohnZ:
--- Quote from: KurtS on November 18, 2015, 07:42:35 AM ---There's two different trans versions with different speedo drive gears. One is for normal gears, one for deep gears.
IIRC, 4.10 is the crossover. It could use either trans, but one trans required the adapter when used with 4.10's. So it all depended on inventory and which trans version they used.
--- End quote ---
My 02D '69Z was "born" with the 4.10 axle, and had the 25-tooth orange speedo DRIVEN gear (P9B17B, tag embossed 3946798). That's what leads me to the conclusion that the ratio adapter was only applicable to the 4.56 and 4.88 axles.
L78 steve:
John I believe the Orange 25 is a later replacement. Mine has a natural 25.
JohnKY:
Both 67 and 68 speedo charts list part #3860348 (orange) as the driven gear for Z28 w/4.10.
67 drive gear is #3708145 (steel)
68 drive gear is #3924097 (yellow)
I don't have a chart for 69, but can't think of any reason why they would change it.
Adapters only on Z28 w/4.56 or 4.88
Navigation
[0] Message Index
[*] Previous page