looking to find what color , teeth or part number is needed for a 85 gt 2.8 4 speed speedometer gear. the gear on the bottom of the speed sensor. thanks

I'd have to pull mine, (probably should check the oil level anyway) but if I remember right it's red.
The car is in my other garage across town right now.
If you don't get any other response I'll stop by and check it..

29 teeth GRN 10041031
30 teeth NAT 10041032
30 teeth BLU 25519845
31 teeth WHT 25519846

Ed

how do i know what teeth i heve or need? mine is missing all together

I thought mine was red or pink, maybe that was due to oil staining the gear? Someone on here will have the answer.

Jack

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If you can not run with the big dogs, stay on the porch!

quote Originally posted by zza_mud: how do i know what teeth i heve or need? mine is missing all together

The teeth will depend on gear ratio and tire size and that chart I cannot find.

Ed

[This message has been edited by Fino (edited 03-19-2008).]

Look on your SERVICE PARTS IDENTIFICATION label on the inner left fender

D4N - red 10041031 29 teeth
D4O - purple 10041032 30 teeth
D4P - blue 25519845 30 teeth
D4Q - white 25519846 31 teeth

I will scan in the chart and post it for you

[This message has been edited by Tinkrr (edited 03-19-2008).]

ive looked up all rpo decoders here found nothing. my rpo for my speedo gear is D4T


edit: i also found out my tire size is205 65r 15 and axle is 4-speed 3.65

[This message has been edited by zza_mud (edited 03-20-2008).]

still looking for information conserning my lost speedo gear as stated before
rpo code D4T
15" wheels
munchie 4 speed 3.63

quote Originally posted by zza_mud: anyone? anyone? or can someone blow up the chart posted earlier so i can read it

Per my 1986 service manual (page 7A-7 Figure 3) the M17 4-speed manual transmission gets the 30 teeth natural with the 29 teeth red gear.
This is for both the 14" and 15" wheels.

I E-mailed you a larger print of the Speedo Gear chart to you.

[This message has been edited by Oreif (edited 04-01-2008).]

i read the chart u emailed it says i need the red 29 tooth gear is this right? i need the small plastic gear that goes on the end of my speed sensor

quote Originally posted by zza_mud: i read the chart u emailed it says i need the red 29 tooth gear is this right? i need the small plastic gear that goes on the end of my speed sensor

That is correct. If you are missing the small gear than you need the "speed gear".
Look at your RPO codes:
Speed Gears (on vehicle speed sensor)
D4N Gear, speedometer driven (N) 29 teeth 10041031 (red)
D4O Gear, speedometer driven (O) 30 teeth 10041032 (purple)
D4P Gear, speedometer driven (P) 30 teeth 25519845 (blue)
D4Q Gear, speedometer driven (Q) 31 teeth 25519846 (white)

Drive Gears (in transaxle on the differential)
D9A Gear, speedometer drive (A) 10 teeth 8632646 (green)
D9B Gear, speedometer drive (B) 35 teeth 14047637 (natural)
D9C Gear, speedometer drive (C) 35 teeth 94408341 (blue)

These are the CORRECT part numbers for the gears.

[This message has been edited by Oreif (edited 04-01-2008).]