TSB Bulletin #231
Transmission Type: RL4F02A
Date: 8-98
Topic: Transmission Falls Out of Fourth Gear:
A common complaint of falling out of 4th gear EXCEPT on lift throttle may be experienced after overhaul or valve body service. The transaxle may shift into 4th only when the throttle is released, then downshift to 3rd as the throttle is applied. Another related symptom may be abnormal TCC apply/release. One cause of these complaints may be the TCC and OD Cancel solenoids installed into the wrong positions on the valve body.
The OD Cancel Solenoid installs here. Wires are Black and Red.
Bulletin #231
The TCC Solenoid installs here. Wires are Blue and White. COPYRIGHT© 1998/PAUL YAKLIN/ATC
Diagnosing electrical problems in a modern transmission with computerization, especially after a rebuilt transmission is very difficult since we automatically assume the rebuilder did the job correctly. In a small shop that does not have pre-testing equipment, the transmission has to be re-installed in the car before it can realistically be tested. The truth is that the car itself is the best testing devise of all, adding the cost of a dynomometer is not realistic for a small shop.
What is realistic is for a supplier of transmissions to pre-test every rebuilt Nissan transmission before it is crated and shipped. Insuring success for the customer and good words for the supplier. Rebuilt transmissions for sale, pre-tested and ready to ship at GotEngines.com @ 866-320-1182..
