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242J vs. 242J Police / Export
I'm doing a transfer case swap & my 2001 Sport, it has a 231J. I'm taking the 231J out & I have a 242J. I believe the 242J I have is a Police / Export transfer case. I'm trying to figure out if I actually have a 242J Police / Export transfer case.
How do I know if I have a normal 242J or a 242J Police / Export model???
How do I know if I have a normal 242J or a 242J Police / Export model???
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What's the difference?
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Join Date: Apr 2002
Location: out in the garage - Minneapolis
Posts: 27,650
5211 1083 is the part number.

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CJ7-Tim, thank you very much.
Web Wheeler
Join Date: Mar 2006
Location: Helsinki, Finland - on the European side of the Atlantic
Posts: 10,016
I'm wondering about the same thing.. what's the difference between the two?
1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...
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1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***
***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
Registered User
Allpar gives an overview-
http://www.allpar.com/squads/police-cars/cherokee.html
Part number shows that chain may no longer be available-
http://www.factorychryslerparts.com/.../04638890.html
I suspect that chain may be heavier and wider....gears also.....may want to check for future availability before installing.
http://www.allpar.com/squads/police-cars/cherokee.html
Part number shows that chain may no longer be available-
http://www.factorychryslerparts.com/.../04638890.html
I suspect that chain may be heavier and wider....gears also.....may want to check for future availability before installing.
Registered User
I assumed the chain is stronger. I don't understand how one tooth design is better than another with this set up...... 
https://www.novak-adapt.com/catalog/..._242_parts.htm
I thought I saw a website some where that the planetary gears were stronger, but I might be confusing that with a 242-HD. In fact, I was under the impression the Police / Export was a Heavy Duty version. But, I believe I am mistaken with that assumption.
Can I also assume all XJ's sent to Canada with a 242J fall into the "Export" category?
Was the "Police Package" an attemp to use extra Mopar stock & charge a higher price for a 242 transfer case package???

https://www.novak-adapt.com/catalog/..._242_parts.htm
I thought I saw a website some where that the planetary gears were stronger, but I might be confusing that with a 242-HD. In fact, I was under the impression the Police / Export was a Heavy Duty version. But, I believe I am mistaken with that assumption.
Can I also assume all XJ's sent to Canada with a 242J fall into the "Export" category?
Was the "Police Package" an attemp to use extra Mopar stock & charge a higher price for a 242 transfer case package???
Web Wheeler
Join Date: Mar 2006
Location: Helsinki, Finland - on the European side of the Atlantic
Posts: 10,016
Quote:
Originally Posted by MaskedMallard
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I assumed the chain is stronger. I don't understand how one tooth design is better than another with this set up...... 
http://www.novak-adapt.com/catalog/t..._242_parts.htm

http://www.novak-adapt.com/catalog/t..._242_parts.htm
1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***
***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
Registered User
Round Pin vs. Rocker Joint
http://www.atraonline.com/gears/1997.../gaug97p69.htm
From what I gather, the Rocker Joint is more efficient. The Rocker Joint is apparently found in the Police / Export XJ package of the 242J transfer case.
http://www.atraonline.com/gears/1997.../gaug97p69.htm
From what I gather, the Rocker Joint is more efficient. The Rocker Joint is apparently found in the Police / Export XJ package of the 242J transfer case.
Web Wheeler
Join Date: Mar 2006
Location: Helsinki, Finland - on the European side of the Atlantic
Posts: 10,016
Heavy duty transfer cases use a wider chain. Both chain styles have been used on the NP/NV transfer cases (round pin and rocker joint), but none of the heavy duty cases have a narrow chain. I've never seen an XJ with a wide chain, but I've seen both chain styles.
My both previous XJs were export models with a 242, and my niner is a ZG built in Graz, Austria. ZJ had a wide chain in it's 249, both XJs had a narrow chain. All using rocker joint design.
My both previous XJs were export models with a 242, and my niner is a ZG built in Graz, Austria. ZJ had a wide chain in it's 249, both XJs had a narrow chain. All using rocker joint design.
1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***
***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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