Muddz

I haven't seen any options either other than older Mopar catalogs with performance headers and exhaust for the XJ and 4.0L. There may have been other Mopar engine performance parts. Mopar upgrades were at one time used for racing, off-road, etc., many or all are no longer manufactured. Can be still found in the aftermarket.

djb383

Bottom line, to the second OP threads #19 & #20, looks like "police pkg" items could easily be add to a regular XJ. With regard to a auxiliary tranny cooler, there r plenty of aftermarket coolers available for +/-$70 that will way out-perform the OE factory auxiliary cooler. After adding an auxiliary tranny cooler and possibly the extended idle feature, I personally see no advantage to making a regular XJ a Police XJ since both have the same horsepower and torque numbers.

Muddz

I don't have any need for the police packaged items either, which is a broader term also covering emergency and service vehicles.
These items are for specialized driving and use.
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I sometimes use after-market items and prefer OE sensors.
After installing a B&M cooler it also lowers engine temps by one or two degrees. Good ones can sometimes be found in a JY from SUVs and Trucks that do towing, etc.
All my aux. wiring is isolated from the OE wiring, rarely need to tap into the OE harness. If you need to tap into the oe harness it's sometimes a good idea to use diodes.
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The person who started the thread was asking about differences from a regular Cherokee. Someone who owns a Police Package XJ may want to know differences and history of a vehicle for customizations, repairs, maintenance, driving/operating, etc.

odgreen

One thing was never mentioned.
A certified speedometer. With all police options that one was the most important.

Rjmils

I have a police certified tagged Speedo in mine

oldguy52

On the 10" drums I believe that is just the difference between a dana and a c8.25. I have both and was surprised to find out that the dana has 10" and the C8.25 has 9". Go figure.

djb383

......and the 9" brakes have more braking surface area than the 10" brakes by about 28%. Go figure on that one as well.

Squidd

Ok I was curious about the police and DNR Jeeps as far as where they mounted their CB's and antennas. Does anyone have any pix of the inside or one of these jeeps I haven't been able to find any myself. I'm sure someone does or could point me in the right direction. Thanks!

DSFB 96XJ

Does anyone know if the pcm in the police cherokees had a chip or were programmed different or were they stock?
Thank you

DSFB 96XJ

i have 3.55 but in a 8.25. Did your's come with ls because of the dana or did you install? Just wondering why some came with dana's, or ls or posi.

wizardpc

If you're asking because yours is bad, just grab a PCM from any 96 auto. It must be a 96!

Bugout4x4

He may be asking for any possible performance differences. I would be curious about this myself.

Anony

They are programmed different (were not stock) and have different OEM part numbers.

Part Number: 56043202 1996 w/Police Pkg.

https://www.ebay.com/itm/Engine-Comp...3D351860014118

I'm not certain about performance differences.

https://www.techauthority.com/ use to have downloadable PCM code for some years XJ. However they seemed to have removed the pcm code for XJ's and have a few manuals that only go back to 2000 XJ.

To re-program requires a compatible DRB-II / DRB-III scanner. Chrysler created and owns DRB-II/III.

Bugout4x4

This is fantastic but I have a curious question regarding this?

"This unit will arive Programmed & Updated to your vehicle's VIN (Vehicle Identification Number) and Mileage. The unit will be Plug and Play with no additional programming needed. We can not begin to process your order until we get your VIN Number.

( We will need your VIN# in order to program the unit. Please put your VIN number in the payment notes or it to us. If we do not receive your VIN number within 3 business days, eBay requires us to ship you the unit without VIN programming."

Does this mean that if you give them a normal rather than a Police package VIN it will not have the Police programming?

Anony

Most likely yes. The re-programmers often will cross-reference the VIN to the PCM, however you may be able to find a re programmer who doesn't need a VIN.

You would need to write to them and ask. Let them know you want e.g. your 96 XJ standard PCM reprogrammed to a 56043202 1996 w/Police Pkg. See if they would go for it. or if your purchasing another PCM you would need to write and ask if they could program the PCM your purchasing from them to a police package PCM without a VIN. Possibly a VIN is required because of Chrysler licensing issues or other.

Another reason they may need a VIN is a VIN is usually related to any factory add-ons. A police package vehicle potentially has other add-ons and modifications effected by the PCM programming. Other add-ons e.g. performance intake and exhaust manifolds, etc.

A PCM's primary function is to reduce emissions that cause pollution. A PCM potentially will sacrifice run-ability in order to reduce emissions. So your engine may run crappy because it's causing to much pollution or the PCM decides to produce less pollution by making some adjustments which may result in the engine not running at 100 percent.

I can't remember if the VIN is stored in the PCM or not. If it is then a smog station may try to match the PCM Vin to a VIN plate on a vehicle.

I think one known difference is the extended idle feature that comes with most police packages.

I suppose it's possible Chrysler/Jeep decided that most Police Package vehicles require certain better than stock performance under varying conditions then perhaps all standard police packages do have modified run-ability settings so an XJ would exhibit better or certain types of performance under various conditions related to police and similar types of work.

However since the PCM primary purpose is to reduce emissions to the point it will potentially sacrifice run-ability and performance, makes me wonder.