Does anyone know if there is a list somewhere that tells you the size and color of the drive and driven gears for the T5 speedo drive? The T5 I have needs to be calibrated to match stock diameter wheels and a new 3.27 rearend. The driven gear is white and it has 19 teeth. The drive gear is blue and still inside the tranny and I can't get a count on the teeth. Anyone know the tooth count? Thanks Ric

Drive Gears:
Purple - 7 #14071731
Red - 9

Driven Gears:
Red - 18
White - 19 #14090592
Light Blue - 20
Orange - 21 #14090582
Gray - 22

This is exactly why I ignore colour every time. The majority of 21's I've seen in T5's have been a green colour. The 22's I've seen have been red.

7 on the lower left, 21 on the right:

hmm, the 21 tooth i have is orange, but its 29 years old. im not sure when they discontinued them. all that i have seen have a metal sleeves

Thanks for the info:

Based on that information and the caculator here http://www.hanlonmotorsports.com/t5speedo.asp

I will need to use an 18 tooth driven gear to get things working
right. Anyone know what speedo housing I have to use with an
18 tooth driven gear. I understand that changes in the number of driven teeth require one of two different hosings to get
the distance between the gears to work right.

Thanks
Ric

That's true for th350-c / th250-c / 700-R4 stuff. I don't believe that's the case for the T5.

GM dealer asked me which part number I needed. two listed for T5.

Ric

Probably for VSS, or cable drive (Camaro had cable through 89; `Bird through 85.)