When auto gearbox gets warm, it only engages 1st gear and does not want to move in any other gear.

1997 FORD RANCHERO
244,000 MILES
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TOERIEN
  • MEMBER
  • 1 POST
When cold operates all gears. As gearbox warms up, it only engages 1st gear so have to drive very slowly, This is a reconditioned gearbox put in at 200,000kms
Nov 19, 2011 at 7:56 AM
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DRCRANKNWRENCH
  • ✓ASE Certified Mechanic
  • 3,380 POSTS
  • ASE Certified Mechanic
The most likely causes for the shifting issue is as follows;

Blown fuse to the PCM controller
Faulty vehicle speed sensor (VSS)
Shorted second gear control solenoid
Faulty transmission controller (PCM)
Nov 19, 2011 at 8:18 AM
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