what year change on t case splines

[comanche87]

hey. wanted to know what year was the spline change for the t cases. i got a 90 xj 231 but looking to possible trade or sell for a 242 if i can find one. i havnt pulled it apart yet. wasnt sure what year was the change from a 21 to a 23 spline. thanks.

[CWLONGSHOT]

Remember its a Jeep, NOTHING is set in stone. But,... IIRC you should be 23 spl. (Heck its a 50-50 guess!!)

 

CW

[Pete M]

Which engine/trans do you have?

[comanche87]

my 87 mj 4.0l is getting bolted up to a 90 xj aw4 with a 231. but want to find a 242. might see if someone on here might be willing to trade. but who knows. lol

[Eagle]

As CW wrote, "Remember ... it's a Jeep."

 

Not certain, but my understanding is that they stayed with the 21-spline several years longer with the 2.5L than they did with the 4.0L. With the 4.0L I believe the spline count changed when they went from the BA 10/5 to the AX15, and that was a mid-year 1989 change.

 

There's also an issue, I believe, of two different input shaft lengths.

 

Bottom line is ... it's best to open it up and do a physical comparison.

[reson46]

The '90 AW4 will have a 21 spline output.

 

Willy

[comanche87]

sweeet thanks man! :cheers: