I've got a 2004 TJ with a 4.0 & 42RLE. About a month ago I replaced the original 42rle at 125k with a reman unit from Powertrain Solutions. I also added a Derale TJ transmission cooler to keep things cool and bypassed the radiator cooler as per the reman companies request.
Most of the time the transmission will shift fine through all the gears but sometimes it likes to rev before a shift and shift hard. The fluid is ATF+4 at the correct level. I've read about relearn procedures to reset the shift points but haven't tried anything yet.
Any ideas what might be causing the sporadic hard shifts?
Most of the time the transmission will shift fine through all the gears but sometimes it likes to rev before a shift and shift hard. The fluid is ATF+4 at the correct level. I've read about relearn procedures to reset the shift points but haven't tried anything yet.
Any ideas what might be causing the sporadic hard shifts?