Speedometer gears for 3.54 rear ratio- C4
05-17-2002, 11:43 AM
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Heel & Toe
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Speedometer gears for 3.54 rear ratio- C4
I have a 1991 that is stock ( 275/40 ZR 17 stock tires ) and I installed a 3.54 ring and pinion. I am trying to find out the two speedo gears inside my 700R4. Can anyone help with GM part #'s or tooth counts? Thanks!! :chevy
05-17-2002, 01:38 PM
#4
Safety Car
Re: Speedometer gears for 3.54 rear ratio- C4 (dgoodhue)
Since IM me saying you had 2.59's you will need
Drive Gear 12507670 Grey 15
Driven Gear 25513050 Purple 43
Vehicle Speed Sensor 10456091
Drive Gear 12507670 Grey 15
Driven Gear 25513050 Purple 43
Vehicle Speed Sensor 10456091
05-17-2002, 02:06 PM
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Re: Speedometer gears for 3.54 rear ratio- C4 (Vettelover8360)
Thanks for the info!!! I looked at the page listed above ( ... Speedometergearshtm...) and I couldn't figure out how you knew the drive gear, the driven gear and the vehicle speed sensor. How did you do it? Thanks again!!!
05-17-2002, 03:05 PM
#8
Safety Car
Re: Speedometer gears for 3.54 rear ratio- C4 (Vettelover8360)
For auto there are 2 different VSS; which one used depends on how many teeth the driven gear has. (Off the top of my head) one is for driven gear 41-45 teeth and the other is for 35-40 teeth. In 1991-3, the 6 speed and auto use different VSS. So I picked the auto VSS for the appopriate number of teeth (41-45 totth VSS)
