Speedometer not working sometimes

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seabee

Junior Member
Joined
Sep 9, 2017
Posts
29
Reaction score
27
Location
South Carolina
First Name
Lee
Truck Year
1987
Truck Model
R10
Engine Size
305
Need help on this issue. 1987 R10 2WD turbo 400 . Ok speedometer will stop working after a few miles (20 miles or more) . If I let it sit still and go back to driving it it will works . New speedometer and cable looks good , can spin cable with fingers and it moves speedometer. A while back had to replace plastic gear in transmission ( old and broke ) . Everything looks good it will stop working and when it cools off start back working. It does have adapter coming off transmission but it looks like it’s working too . Thanks for in help .
 

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Terry Wilkerson

Full Access Member
Joined
Dec 2, 2021
Posts
505
Reaction score
680
Location
Kansas
First Name
Terry
Truck Year
1986
Truck Model
GMC 1500
Engine Size
350
Sounds like something
is heating up and slipping. Cools down and works for a while.
 

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