175 Km-77 A/T - Pulse Generators (SUB0326AP)
Publication date: 1995-03-01Reference number: SUB0326AP
175 KM-77 A/T - PULSE GENERATORS
TECHNICAL INFORMATION TIP
MITSUBISHI TRANSMISSIONS
YEAR(S): 1985-92
MANUFACTURER: Mitsubishi
MODEL(S): Eclipse, Galant, Precis, Sigma
DATE OF ISSUE: March, 1995
ISSUE & TIP
When testing the 175 KM-77 automatic overdrive transmissions used in 1985-92 Mitsubishi products, be aware that the two pulse generators that are mounted on top of the transmission case may be incorrectly positioned. If the positions of the pulse generators are reversed, the transmission won't shift properly. A scanner won't reveal that anything is wrong, and a transmission overhaul won't help the situation.
Try swapping the positions of the pulse generators before you get buried in your diagnosis. Whoever worked on the vehicle before you may have already done the same, causing the problem.
Courtesy of Import Service Magazine
with thanks to:
R.D. Cochnauer
Car Doctor
Oklahoma City, Oklahoma
REFERENCE NUMBER
SUB0326AP