old_man
NAXJA Forum User
- Location
- Loveland, Colorado
I am running a Renix era AW4 and need to replace it. I have a chance at an AW$ from a 98. What are the differences and can I make it work?
Zoro said:I know on the Renix era AW4's there is the tranny-comfort switch that the H.O. Jeeps never had so maybe there'll be an electronic issue but mechanically with what's been said and what you have access to it should work.
5-90 said:Shouldn't be any - I don't recall any internal mechanical or electronic changes, apart from what was already discussed (output spline and flexplate.)
Sounds like you know what you are talking about. Do you do this for a living?lawsoncl said:When they switched to ODBII in 96/97, there were two sensor changed on the AW4.
1) A front input shaft speed sensor was added so the trans computer could diagnose problems like a bad shift or lockup soleniod and verify it's in the proper gear. This is the reason an ODBII XJ throws an error code if you wire in switches to manually shift the tranny.
2) The rear speed sensor changed type and pulses/rev. The older sensor was a magnetic reed switch that closed once per rev. The newer sensor is an inductive sensor that gives 4 a/c pulses per rev. The rotor on the shaft went to 4 lobes instead of 1. This sensor is on the drivers side under the xfer case shifter linkage bracket.
But the good news is that you can still use the 98 AW4.
You'll have to pull the the tailcones off, swap over the older rotor and use the older speed sensor. If you have the FSM, it has a diagram which makes the swap look pretty simple. You pull the adapter housing (no need to remove the pan), remove a snap ring, and use a piece of wood or dowel to pry the rotor rearward until it slides off. Once you swap the rotors, the older/longer sensor should bolt right in. You can leave the front speed sensor unconnected since the older TCU has no inputs for it.
-Chris
old_man said:If the tail cone is off, how hard is it to swap the output shaft?
Only In A Jeep XJ said:X2 just out of Curiosity make it a little cheaper on the swap.
old_man said:Sounds like you know what you are talking about. Do you do this for a living?