I am trying to help my brother fix an intermittent problem he's been having with his 2002 WJ with the 4.0 and 42RE. I have determined it is the speed sensor and I have the new part. I was about to change it and the DIY I found http://www.wjjeeps.com/speed_sensors.htm says to just pull it and replace it, but that DIY was for the 45RFE / 545RFE, which has 2 sensors up higher.
The sensor on the 42RE looks to be way on the bottom and I am wondering if this is going to dump the fluid if I take out the sensor. Obviously it's a much more messy job if that's the case so i want to be prepared with a pan and fluid.
If anyone has done this with the 6 cylinder tranny please let me know.
Thanks from the TJ side!