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Wiring an A4LD

B

Bill Blue

Platinum Level Sponsor
There is a small handfull of wires coming out of my transmission. So far I have identified most of them. A single power feed for the two solenoids, a wire for each solenoid, a pair for the safety start circuit and a pair for the backup lights. That leaves one wire that is a mystery. Is not grounded to the transmission, what could it be for?

Bill
 
hartmandm

hartmandm

Moderator
Diamond Level Sponsor
Does that gearbox support a top gear lockout, like when towing or going down hill?

Mike
 
B

Bill Blue

Platinum Level Sponsor
hartmandm said:
Does that gearbox support a top gear lockout, like when towing or going down hill?

Mike
Click to expand...
Sort of. Top gear engagement as well as torque converter lockup is controlled by the driver with the 3-4 solenoid and the lockup solenoid. It is possible to drive in third with the torque converter locked up. I think it is considered okay to downshift from 4th to 3rd while the converter is locked. I believe that 3rd is direct while 4th is .75:1.
Bill
 
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