Internal vs external splines
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Member
Joined: Apr 2019
Posts: 125
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From: In the desert
Year: 1995
Model: Cherokee (XJ)
Engine: 4.0 now 4.6
Internal vs external splines
Looking to buy a used NP231j T-Case. The seller I’m working with has asked if my XJ has internal or external splines. I have no idea. Is there a way to tell without dropping it?
The seller is stating that 1995 is a mixed year for the 231 cases and needs to know my set up to see if his will work.
The seller is stating that 1995 is a mixed year for the 231 cases and needs to know my set up to see if his will work.
Last edited by Patman; May 29, 2019 at 09:56 AM.
CF Veteran
Joined: Nov 2017
Posts: 3,700
Likes: 238
From: Groton, MA
Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
Did any MJ/XJ/TJ Jeep use external splines on the input shaft?
Another thing to be aware of is there is apparently a clocking difference between the transfer cases such that the transfer case from a Wrangler may not directly bolt onto an XJ. As I understand it's not too big a deal to adjust, but definitely something to be aware of.
Another thing to be aware of is there is apparently a clocking difference between the transfer cases such that the transfer case from a Wrangler may not directly bolt onto an XJ. As I understand it's not too big a deal to adjust, but definitely something to be aware of.
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
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From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
Yeah, the TJ is clocked differently to keep ground clearance to a maximum. Because of the short wheelbase it tends to high-center more easily. Or maybe it's the other way around.....
CF Veteran
Joined: Dec 2017
Posts: 4,365
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Year: 1989
Model: Comanche (MJ)
Engine: 4.0
Looking to buy a used NP231j T-Case. The seller I’m working with has asked if my XJ has internal or external splines. I have no idea. Is there a way to tell without dropping it?
The seller is stating that 1995 is a mixed year for the 231 cases and needs to know my set up to see if his will work.
The seller is stating that 1995 is a mixed year for the 231 cases and needs to know my set up to see if his will work.
http://www.novak-adapt.com/knowledge/np-nvg-input-gears
There is a note on the Novak site about 1994 GRAND Cherokees having a funky input shaft with external splines.
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