A/T - 41TE/42LE Bind-Up In Reverse
TECHNICAL BULLETIN # 326DATE: 1996
TRANSMISSION: 41TE / 42LE
SUBJECT: Bind-up in reverse
APPLICATION: Chrysler
41TE / 42LE
Bind-up In Reverse
A bind up condition in reverse, with all forward gears operating properly, can be caused by either a friction element being applied when it shouldn't or a mechanical interference condition. Use the following procedure to isolate the problem.
Step 1:
The underdrive and 2/4 clutch pressure taps must be checked for pressure when the bind-up in reverse occurs (figure 1). Any pressure observed at these taps, indicates a hydraulic cross-leak (possibly caused by warpage), leaks between the valve body or solenoid body sections, or leaks between or within the stator support and input drum. If no pressure is observed on these pressure taps, proceed to step two.
Step 2:
The valve body must be removed, and the reverse clutch air checked (figure 2). As the clutch applies, the bottom of the O/D-Reverse pressure plate should remain near flush with the 2/4 clutch piston housing snap-ring (figure 3). If contact is observed between the input drum and the 2/4 piston housing, the Tru-Arc snap ring that holds the input drum to the input hub is probably missing (figure 4). This is the lower of the two Tru-Arc snap rings in the drum assembly, not the upper ring used to hold the underdrive clutch return spring retainer.
Step 3:
If neither of these tests reveal the problem, the problem is usually found to be an improperly assembled underdrive clutch. Service manual assembly procedures for the input drum should be reviewed, paying close attention to ensure that the underdrive/overdrive pressure plate is securely locked between the two proper snap rings, and that adequate underdrive clutch clearance exists.