speed sensor not properly working

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Mar 25, 2006 | 11:33 AM

bigtom88transam

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Joined: Feb 2006

Posts: 164

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From: Pine Bush, NY

Car: 88 trans am, and 06 focus DOHC

Engine: 305 tpi

Transmission: 700r4

Axle/Gears: 4.56 screaming pave eating :-)

speed sensor not properly working

i was wondering if anyone knows how to recalibrate speed sensor for different gears...i know someone with expensive snap on scanner but not sure how to go about doin it
thanks

Mar 29, 2006 | 01:22 AM

Firebat

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Thirdgens had speedo gears that you also swap out when swapping gears. These are plastic gears that are on the vss and the taillshaft of the tranny. Not til 93 or 94 did f-bodies have the capabilities of reprogramming the ecm/pcm for correct speedo output. Ask or search around on the transmission and drivetrain forum for more info.

Last edited by Firebat; Mar 29, 2006 at 01:38 AM.

Mar 29, 2006 | 02:31 AM

Jade Grey

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Posts: 689

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From: Irmo, SC

Car: 1992 Pontiac GTA

Engine: 305TPI

Transmission: 700R4

Axle/Gears: 10-bolt, 2.73

Besides the technical article on our site, Mike Davis has a nice page on speedometer gear swaps on his website. http://www.eecis.udel.edu/~davis/z28...p/misc/speedo/.

This technical article, Changing speedo gears (4L60/700-R4), may also help you.

The gear part numbers are located in the FAQ, https://www.thirdgen.org/newdesign/f...n.shtml#tranny.