1994Diesel
Constantly thinking
Can you explain why a little more. Mine will lock in third at 25mph any lower and it shifts down. That's just with the b&m shift kit. No lock up mod.
"Make sure that when going under 30 MPH, that the switch is UNLOCKED. Stopping may become harder and you can burn up the transmission in 1st and 2nd gear with the converter locked due to lack of lubrication."
From the tech article