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Floof 02-25-2009 01:17 PM

Frequently Asked Questions: WK/XK
Let's try making a comprehensive thread for all those all-too often asked questions. I'm on here quite a bit so I'll keep updating this first post with answers and new questions if everyone wants to chip in. I've left some answers blank as I don't know the correct answer, I'd love some help from you guys:thumbsup:

Let's get started!

Q: What is the biggest tire you can fit without a lift?

A: Without any trimming or bolt cutting, 255/65/17, but you may have some rubbing at full lock(steering wheel turned all the way in one direction) with some tires depending on tread depth and design. The largest 18" tire you can add on the stock 18" rim without a lift is a 265/65-18.. The more aggressive looking the tread, the less clearance you will have. If you are unsure whether a tire will fit, go to a local tire chain(Big-O, Les Schwab, America's/Discount Tire Co, etc) and have them test fit that tire on both front wheels. You can then check the bolt for the Upper Control Arm(UCA), just above and to the inboard side of the front tire. Turn the steering wheel to full lock in each direction and check for the tire rubbing against the wheel well on the edges of the tire.

Q: What is the biggest tire you can fit with a 2-3" BB lift?

A: 285/70/17 or 33"x11.5"x17"

Q: What is the best Budget Boost(BB, 2-3" lifts) lift?

A: It's debatable, but the most common for WKs are the Rock Krawler X-Factor lift and Rocky Road Offroad's 2" kit. Old Man Emu's Shocks/Coils kit is the most expensive, but probably the best handling and more like a proper lift.

Q: Where can I find a list of all lift kits for my WK?

A: Right here, thanks to WK05Calgary... Listing of 2005-2009 (WK) Grand Cherokee Lift Kits - Forums

Q: Where can I find xx information about my WK?

A: Start off with your users manual. If you don't have one, use the link above to look at one online in .pdf form(you'll need Adobe Acrobat Reader to look at it). You can also try - 2005 Jeep Grand Cherokee

Q: Where can I find armor for my WK, such as rock rails, skid plates, etc?

A: The most popular website , and with nothing but positive feedback, is 4xGuard, WK lift, WK bumper, WK accessories, Jeep Grand Cherokee, jeep grand cherokee, skid plate, lift kit, commander, accessories, sliders, brush guard, light bar, Off Road, wk, xk, jeep, winch, bumper, grand cherokee, Jeep Commander, Accessories,

Q: Which 4wd system is better, Quadra-Trac I, II(QTI and QTII), or Quadra-Drive II(QDII)?

A: From best to worst(but even the worst is still quite good), QDII -> QTII -> QTI.

Q: Can I put HIDs on my WK, even if I don't have a 2008 styled front bumper?

A: Yes. You can buy an OEM HID headlamp assembly, like Scottina06 did here: --HOW TO--add 2008 HID headlights to your 05-07 WK! -
You can also retrofit other HID projectors into your stock headlamp assemblies, like Tonyl27 did here: Custom HID projectors retrofit on 06' - Forums

Q: What is the difference in gas milage between, 2wd, QTI, QTII, QDII transmissions and/or the 3.7L v6, 4.7 v8, and 5.7 HEMI v8?

A: The difference between 2wd and any 4wd in mileage is extremely negligible, as in under 1mpg difference. The difference on average between each engine is about 1mpg if not a little less. The favorable medium for most people seems to be the 4.7 v8 with QDII. If you are planning on getting larger tires, you will get better gas mileage with the v8 than the v6, because the engine is bigger it doesn't have to work as hard to push that extra weight around the axle.

Q: My WK is throwing "xxxx" code, where can I find information on what that code is?

A: Right here: Diagnostic Trouble Codes for OBD II and Details -

Q: How do I change the spark plugs on my WK?

A: Here's a guide for the 3.7L v6 engine... how to replace spark plugs on a 3.7l v6 WK - Write ups are needed for 4.7L, 5.7L HEMI, and 6.1 SRT8!

Q: Where can I find information on electronic equipment on my WK, such as Uconnect and MyGIG?

A: My-GIG info

UConnect - Home

Wire connector repair kit part number and pin info
Mopar Connector Repair Kit Website

Q: Where can I find service information and updates for my WK?

A: Official service info

Q: Where can I buy MOPAR specialty tools to work on my WK(diagnostic tools, specific mechanical parts, etc)?

A: Right here:
SPX Miller Special Tools | Main

Q: How do I change my spark plugs on a 4.7L?


Q: How do I replace the MTC blower motor resistor?

A: HOW TO: Replace the MTC Blower Motor Resistor (colinzj contributed this thread)

There is some very good information on these two web sites for the Jeep WK and XK.

Jeep Commander XK: XKJeeps.Com

Jeep Grand Cherokee WK: - 2005 Jeep Grand Cherokee

Everything you need to know about the SuperLift and modifying it.

The Modified Superlift Thread

colinzj 06-23-2009 10:13 AM


Originally Posted by carneyd (Post 7457049)
I just purchased a 2008 Grand Cherokee with Quadra-Trac 1. I was told later on that this was more of an AWD system and not a 4WD system. What will my limitations be as far as off-roading is concerned?

QTI lacks a low range gearing, so you're screwed anywhere you need that 2.72:1 torque multiplier.

For a lot of off-the-pavement use you'll be fine—both the high-range 4WD and the BTCS limited slip work well—but you'd probably want to avoid trickier spots.

If your idea of off-road is forest service roads, you'll probably never notice a difference if they're dry.
If you're expecting to tackle 4x4 trails or cruise through heavy mud, then you might run into problems.

Tire choice and careful driving will still take you a long way, though.

Texas WJ 12-15-2009 11:04 AM

HOW TO: Replace the MTC Blower Motor Resistor
(colinzj contributed this thread)

kdawgFL 03-06-2010 04:01 PM

these two site specialize in wheel spacers

Wheel Adapters, Wheel Spacers, Hub Rings, and much more! | Motorsport Technology or try home page for lugmanusa and for lugman wheel adapters

hub-centric is the way to go

Texas WJ 04-19-2010 12:20 PM

5.7 Hemi Spark Plug Swap.

Texas WJ 07-20-2010 10:22 PM

How To Change Front Struts and Rear shocks

Texas WJ 08-05-2010 05:48 PM

HOW TO: Transfer Case Fluid Change

SSF556 08-28-2010 08:03 PM

Oil Change Procedure on the CRD...since it comes up at least once a month...

Well did a service on a 3.0 CRD today so took some pictures for you guys and so decided to do a write up.
oil change
1. Removed top cover and oil cap.
2. Undone the oil filter but didn’t remove so the oil filter drains. (saves mess later)
3. Raised vehicle and removed skid plate
4. Removed drain plug and drained the oil (drain pan needs to hold at least 9.5 litres)
5. After the oil drained replaced drain plug with new washer and tightened to 30 NM.
6. Lowered vehicle and put 4.5 litres in the oil filter housing and the rest in the oil filler. This is to prevent crankshaft damage.
NOTE : it is very important not to spill any oil around the oil filler as the alternator is directly below and oil can damage it.
7. Replace oil filter cartridge and installed the new seals that came with the filter. See T.S.B Slightly oiled the new seals and reinstalled the filter into the oil filter housing and tightened to 25 NM.
8. It is now critical to wait 15 minutes before starting to allow the oil to drain down. Service manual also say wait 15 minutes after engine has run to allow the oil to return to the pan before checking the oil level.
Why I wait for this I change the fuel filter and have attached some pictures of bleeding the filter and a picture of the drain tube so you can see why the drain tube is at the top of the filter because the tube goes to the bottom of the filter.

Fuel filter change
1.Remove top cover
2.Remove fuel pipes
3. Unplug water in fuel sensor
4. Remove 3 x E10 bolts
5. Remover fuel filter
6. Remove 2 x T20 screws and remove water level sensor
7. Loosen 5mm allen bolt and remove the fuel filter from cradle
Refit in reverse order. To bleed air open up bleed screw, attach suitable pipe from the bleed screw to a container and turn on the ignition till clean fuel comes out. Close screw and remove pipe.


Useful info
An SAE Synthetic engine oil that conforms to ACEA A3/B4/C3 that is approved to MB 229.31 low ash oil
OIL CAPACITIE 9.5L (10.0 Quarts)
Drain plug torque 30 nm 22 ft-lbs
Oil filter 25 nm 18 lbs-ft with oil filter socket 9551
Tools for fuel filter change E10 socket, T20 torque socket, 5 mm allen key socket.
Perhaps some of you can add where to get oil and oil filters from.

I8AHUMR 10-07-2010 07:40 AM

Differential pinion mount isolator replacement writeup
Differential pinion mount isolator replacement writeup

Texas WJ 10-15-2010 11:03 AM

Steering Wheel Clicking - TSB repair
(written by sammy29926)

Texas WJ 10-21-2010 06:29 PM

4.7 V8 Instructional Videos
(Written by BonesWK)

Videos Included:

Serpentine Belt Replacement

Spark Plug Replacement

Oil Change

Differential Change

Transfer Case Change

Transmission Fluid and Filter Change

BonesWK 04-06-2011 07:52 AM

2" Lift Tires Sizes
2"-2.25" BB Tire options. - NOT Including the OME 3"

245/75/17 - No spacer or pinch weld mod required

255/70/17 - spacer optional (minor rubbing without) no pinch weld mod

265/70/17 A/T - No spacers, no pinch weld

265/70/17 AND 255/75/17 - M/T - Spacer required 1.5" or some people use 1/4" AND Pinch weld mod required.

33x12.5x17 - 1.5" Spacer, Pinch weld and rear fender modification required

Budasac 04-06-2011 08:32 AM

265/70/17 will fit stock rims with no spacers and no pinch weld mod. It's the tire size Rough Country recomends to use with their 2.25" BB lift.

BonesWK 04-06-2011 08:56 AM


Originally Posted by Budasac (Post 11316331)
265/70/17 will fit stock rims with no spacers and no pinch weld mod. It is the tire size Rough Country recomends to use with their 2.25" BB lift.

looks like this whole mystery can be solved with a simple question - Is the Tire an A/T or an M/T. I changed it.

Thanks Buda :cheers2:

Budasac 04-06-2011 10:34 AM


Originally Posted by BonesWK (Post 11316467)
looks like this whole mystery can be solved with a simple question - Is the Tire an A/T or an M/T. I changed it.

Thanks Buda :cheers2:

Firestone Destination A/T

The time now is 05:33 AM.

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