Rolls in gear

[JMO1990renix]

Thank you Patrick

 

[JMO1990renix]

I came across a 1991 Cherokee that I pulled the transmission and transfer case out of. I put the sye in the 1991 transfer case and installed that in my 1990 Jeep Cherokee. The 1990 was vacuum and the 1991 was not.

 

[RCP Phx]

That sounds like your problem, the '90 is 21 spline and the '91 should be a 23 spline!
https://www.novak-adapt.com/knowledge/np-nvg-input-gears/

 

[RCP Phx]

That was kind of important info to leave out! At this point you could either swap over the SYE or look at swapping out the input gear but you will have to be aware of the gear cut and the length.

 

[JMO1990renix]

Thank you sir you are 100% correct. I went and measured the transmission and transfer case I have out. Thank you so much. The next question is can I simply just swap the input gear? Or do I just put the sye in the 1990 transfer case?

 

[JMO1990renix]

 

[RCP Phx]

That was kind of important info to leave out! At this point you could either swap over the SYE or look at swapping out the input gear but you will have to be aware of the gear cut and the length.

Should be a straight swap...but check

 

[RCP Phx]

BTW, get a new seal and IIRC there is a gasket to.

 

[RCP Phx]

You should be good to go, I went back and looked at my 4.1 install and it was just sealed with silicone.

 

[techno1154]

Glad you found the problem. You should be out having fun with the XJ this coming long weekend.