Symptoms
- TCC slip
- RPM flares under cruise
- P0741 + P1870 together
The Fix
Diagnostic + Fix
Internal TCC apply circuit leak. Pump checkball, 2-4 servo seal, or accumulator. Teardown required.
Cost: Master kit + ~6hr 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 P1870 code.