the speedometer is not working and the transmission rarely shifts from 1st to 2nd

2001 FORD TAURUS
Avatar
KF
  • MEMBER
  • 4 POSTS
Replaced engine and transmission. After install, the speedometer is not working and the transmission rarely shifts from 1st to 2nd. I have already swapped the turbine speed sensor and output shaft speed sensor from the known good transmission.
Fuses all check.

Any thoughts? Open circuit between sensor and PCM?
May 8, 2012 at 3:07 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
Advertisement
Avatar
HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 48,601 POSTS
scan for codes first and where did the trans come from? you may have a bad solenoid or valve hung up.
May 5, 2021 at 12:11 PM
Advertisement
Avatar
KF
  • MEMBER
  • 4 POSTS
Pulled engine and transmission together from a recent wreck. Set a turbine speed sensor code, but cleared after I replaced it with a known good one. Would a solenoid or valve result in no movement from the speedometer?
May 5, 2021 at 12:11 PM
Avatar
HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 48,601 POSTS
no but you could have a bad sensor even if you thought it was good. does it shift to any gear or just stays in limp mode. have you tried the easy stuff like fuses underhood and in car? is the ground good on engine and does gry/blk wire getting a signal from the pcm?
May 5, 2021 at 12:11 PM
Avatar
KF
  • MEMBER
  • 4 POSTS
I swapped the sensor from my original transmission to the installed, which was working fine before the head gasket blew. Fuses all look good.
Will double check the ground on the engine. I haven't checked the signals yet but plan to do so this evening
.
May 5, 2021 at 12:11 PM
Avatar
ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
did you replace the vehicle speed sensor?? it is on the passenger side of the trans.

you need a scan tool to see if there is a signal to the pcm.

Roy
May 5, 2021 at 12:11 PM
Avatar
DJCL
  • CAR REPAIR CONTRIBUTOR
  • 767 POSTS
Get a scaner and check transmission data. This would be a big help. And end a lot of questions. Some where along the line your loosing your spedo input .
May 5, 2021 at 12:11 PM
Avatar
KF
  • MEMBER
  • 4 POSTS
Checked continuity between pcm and vss. Loose connector at pcm. Problem solved.
Thanks for the inputs...I appreciate it
May 5, 2021 at 12:11 PM
Avatar
DJCL
  • CAR REPAIR CONTRIBUTOR
  • 767 POSTS
No problem
May 5, 2021 at 12:11 PM