98 AW-4 to OBD1 4.0L

[gmoabrim]

I'm installing a 98 AW-4 into a CJ with a OBD1 4.0l. I have searched on many message boards, Google'd it to death and can't find much info on using the OBD2 trans with a OBD1 system. One suggestion is to change the speed sensor, rear I guess, for a earlier one and use the earlier TCU wired properly. This 98 trans has a 4-toothed speed sensor rotor on the tail shaft, the AW-4 manual I downloaded from the net shows a 2 lobed rotor on the tail shaft. Maybe this is what needs to be changed along with the sensor. Can anyone verify this or steer me to some more info?

P.S. I will be using Brett's shifter so it will be manually shifted (electrically) but it would be nice to have full auto too. TIA

GM

 

[DaveB]

When I did my 4.0/aw4 swap in my cj8 I used a 99 TJ motor and a 95 aw4. I used 93 xj wiring harnesses. Everything works fine on my setup. I did use a speed sensor on it so my cruise control would work properly.
My son put in a 96 obd2 aw4 into his 87 MJ and it worked fine but I'm not sure if a 98 is different. I do happen to have four spare aw4s in the garage so you could compare sensors if you wanted to. I have an 89, 91, 92, and a 93.

 

[gmoabrim]

Thanks DaveB, would you look at the 93 and see if it has a 4 toothed rotor on the tail shaft? The easiest way, if the tail housing is on, would be to pull the rear sensor and look through the hole with a flashlight while turning the output shaft. Thanks!

GM

 

[DaveB]

Thanks DaveB, would you look at the 93 and see if it has a 4 toothed rotor on the tail shaft? The easiest way, if the tail housing is on, would be to pull the rear sensor and look through the hole with a flashlight while turning the output shaft. Thanks!

GM

I looked at the 93 and the 92 and they both had two large lobes that are for triggering the sensor.