Symptoms
- No torque converter lockup
- Erratic shift points
- Speedometer drops to zero
The Fix
Diagnostic + Fix
Output speed sensor (OSS) at extension housing. Replace OSS - pair with ISS replacement.
Cost: ~$25 + 15min labor
Why Same-Day Ship Matters
Customer's truck is in the bay. Code is logged. You quoted the fix. Now you need the part on your bench TOMORROW, not Friday. We ship before 2pm Eastern, free on orders over $40, and the 4L60E catalog has every common solenoid/sensor/kit you need to clear a P0720 code.