TrackAire
Member
- Joined
- February 16, 2020
- Messages
- 47
- Reaction score
- 23
- City, State
- Vacaville, California
- Year, Model & Trim Level
- 1989 Bronco II
Just picked up a 1993 Explorer 4x4 with 3.27 gears, auto and the stock size 235/75/15 tires. On the highway at a constant 65 mph the tach shows around 2200 rpm. How can I tell if the torque converter is locking up?
The RPM's seem just a little high to me. I've tried touching the brake while holding a steady 65 mph but no change in RPM. (I have other cars that unlock the converter when I do this).
Any other way to tell if the transmission is locking up the torque converter in 4th gear?
Does the coolant temperature have to be at a certain level before the computer allows the converter to lock up?. I do not believe my coolant gauge is working and have it scheduled to be check by a mechanic on Wednesday. When I bought the truck I used a thermal scanner after a long test drive to check the upper radiator hose and the coolant seem pretty cool (like 160 degrees).
I've done some forum searches but I'm not finding a way to test while driving without tapping into wires on the solenoid, etc.
The RPM's seem just a little high to me. I've tried touching the brake while holding a steady 65 mph but no change in RPM. (I have other cars that unlock the converter when I do this).
Any other way to tell if the transmission is locking up the torque converter in 4th gear?
Does the coolant temperature have to be at a certain level before the computer allows the converter to lock up?. I do not believe my coolant gauge is working and have it scheduled to be check by a mechanic on Wednesday. When I bought the truck I used a thermal scanner after a long test drive to check the upper radiator hose and the coolant seem pretty cool (like 160 degrees).
I've done some forum searches but I'm not finding a way to test while driving without tapping into wires on the solenoid, etc.