Speedometer is pegged

Tiny
RCOLE0388
  • MEMBER
  • 2003 FORD F-150
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 228,000 MILES
I just put a 4r70w transmission out of salvage yard in and when I drove it after install my speedometer goes an hits a 100 mph and I am only doing about 30. I believe it is tripping the governor because it shuts down until needle drops below 99 mph. I have replaced speed sensor in differential and rear of transmission. It never did this with old transmission.
SPONSORED LINKS
Do you
have the same problem?
Yes
No
Friday, September 8th, 2017 AT 7:32 AM

1 Reply

Tiny
KEN
  • ADMIN
Did you have the 4r100 before? I would check the connection at the output shaft speed sensor. Here are the wiring diagrams (below) for both so you can do a pin to pin check by following this guide.

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what happens and upload pictures of the problem.

Cheers, Ken
Images (Click to enlarge)
Thumb
Thumb
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, September 9th, 2017 AT 11:46 AM

Please login or register to post a reply.

Related Instrument Cluster Gauge Speedometer Content

VIEW MORE

Sponsored links