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View Full Version : What 5 speed tranny on 98 XJ's, and mod AW4 to 23 spline Q's?


geberhard
April 9th, 2008, 10:45
Sorry for the newbie question here, but am searching and not getting a straight answer. Looking at a 98 XJ, 4.0, 5 speed; does it have a AX15 or 3550 tranny?

Another Q, anyone has modded tyhe AW4 output to 23 splines from 21?

I may get this rig and transplant stuff from the 88r XJ to start on a cleaner platform.

Thanks!

5-90
April 9th, 2008, 11:25
Sorry for the newbie question here, but am searching and not getting a straight answer. Looking at a 98 XJ, 4.0, 5 speed; does it have a AX15 or 3550 tranny?

Another Q, anyone has modded tyhe AW4 output to 23 splines from 21?

I may get this rig and transplant stuff from the 88r XJ to start on a cleaner platform.

Thanks!

Should be AX-15, the NV3550 was only used in the XJ for the 2001MY (as I recall.)

The AW4 can be changed from a 21-spline output to a 23-spline, but you're looking at a minor overhaul to do so (mainly because the output shaft wants to be changed, and you'll have to tear the box apart from the front. Everything has to come out! I've torn a couple down myself...) Easier to just get a 23-spline, or change the input gear on the transfer case (but you run into a change in gear cut for the NP231 ca. 1995/1996 or so.)

geberhard
April 9th, 2008, 11:51
5-90, thansk excelent info! Thank you!

Gui