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10-02-2008, 10:32 AM #1
- Join Date
- Oct 2008
- Montreal, Canada
Erratic Speedo-1991 R2500 Suburban
Here is the scoop.
1991 Suburban 6.2 Diesel
Automatic 4speed overdrive trans.
139000 kms (86370 Miles).
Drak has been replaced
Vehicle speed sensor replaced last week.
No engine codes.
Wiring between VSS and body is soft but seems solid.
My problem is during acceleration, speedo intermittently drops and fluctuates speed causing tranny to downshift, although it doesn't need to. This occurs anywhere between 45 mph up to 70, and more so during humid or wet weather.
Any ideas or experience on this one?Kirby
GM Fan-through & thru!:glasses:
10-02-2008, 07:49 PM #2
this type of thing happened to a friend of mine in an older PowerJoke, the tranny tried to keep up with the bouncing needle and made it shift erratically. He replaced the gauge cluster and now it shifts perfectly.Dan
1999 GMC Sierra 2500 350 vortec
1967 Jeep M725 ambulance 230 tornado
1990 Cherokee Limited- 3 inch lift on 33's
...and every one of em has issues
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