[landtank]

First, I have delayed engagement and slipping in reverse when under load such as backing a tent trailer up a hill. It started at around 60k and has progressively gotten worse. It's not a total failure yet, but I'm not waiting to get stuck on vacation to finally do something about it either.

TSB breakdown:

Starting with serial number 96JE-06161, the B3 brake return spring assembly and low coast modulator valve compression spring was updated.

Starting with 97AE-07106 the matterial of 3 O-rings where changed to help them seal better.

Then serial numbers 97H*-00001 thru 97K*-99999 need to have the check ball added to the valve body.

Starting with the 97H*-00001 tranny there must have been a design change that happened on the production floor but wasn't or couldn't be applied to the exhisting trannies in the field. Only those trannies need the ball to be added to get rid of a chatter shifting OUT of reverse.

I only looked up the LCs but if someone were to scan the Tacoma, Tindra and 100 series LCs more changes might have been made to this tranny as the core unit is used on all of them.