Transmission Service and Adjustment!(fixed flairing)
01/20/2017
Recently the transmission started having a pretty pronounced flair from second to third. I thought the worst and began looking for transmissions. I decided before doing that i would try servicing and adjusting the transmission. I started by adjusting the TV cable. It helped with my shift timings but not the flairing. So in my Automatic Transmission class we were doing transmission services so I decided to do the service in class. The transmission fluid was really clean. I have a suspicion that the PO serviced the transmission himself because it had a cheap rubber gasket that was seeping and didn't have ATF +4 in it. Next was to adjust the bands. This usually gets rid of the two to three flair. There is a pretty specific procedure that you have to follow that can easily be found with a quick google search. I would suggest trying to find the factory service tool as it would be very difficult to adjust the front band without it. After that I decided to check the condition on the accumulator spring. I removed the plate and found this:
This would cause a very mushy three to four shift. It is a very common issue in the ZJs and WJs. One of my classmates did a service on his WJ and had the exact same spring failure.
I then replaced the spring, put a new filter in it, bolted the pan back up, and filled it up with fresh ATF +4.
I took it for a test drive and had no more two to three flair and the three to four shift was much firmer. Since doing the transmission service I have picked up about two miles per gallon.