Soa Driveshaft Question

[BIGHEEP]

I have a 1988 SWB AW4 2WD Comanche that I am planning on going SOA with. A 4WD convertion is in it's future but can I get away with running the stock driveshaft for occasional street use for now until I do the swap? Maybe with a YJ yoke to give me a bit more spline engagement?

[Myron]

Should work fine especially if you don't get in a bind. You may need a crossmember drop. If it comes down to it most machine shops can build you a driveshaft pretty cheap. Just bring them your old one and tell them how long it needs to be.  

[CoryMJ89]

When u do the swap and put a new tcase in u can't run the stock driveline different spline count

[mvusse]

When u do the swap and put a new tcase in u can't run the stock driveline different spline count

 

Umm, no. All 2wd Jeep transmissions have the same output spline count as all Jeep 4wd transfer cases. At least between MJ, XJ, YJ, TJ and ZJ.

[87manche1]

Just the length when u swap to 4x4 is the issue

[CoryMJ89]

 

 

When u do the swap and put a new tcase in u can't run the stock driveline different spline count

Umm, no. All 2wd Jeep transmissions have the same output spline count as all Jeep 4wd transfer cases. At least between MJ, XJ, YJ, TJ and ZJ.

 

Mine didnt

[mvusse]

The only 2wd transmission I have here is an AW4. It, supposedly the original 2wd AX4 that came out of my truck, and every 231J/242J transfer case I have worked on (6 so far) used the same slip yoke. Chevy uses the same size and spline count but is longer, YJ is same diameter and spline count but 1/2" longer, although not splined the whole way. But the YJ ones are machined to allow steeper driveshaft angles.

 

The only difference I have noted is around ~1994 they went to an externally lubricated slip yoke with a grease boot. Earlier ones were internally lubricated by the transfer case.

 

I have also installed a SYE on 2 of my three Jeeps, so I have a few yokes laying around (both XJ/MJ and YJ) if somebody needs one.