This is my second Jeep my first was a ZJ 4 ltr petrol but only doing at best 24 mpg I wanted better fuel mileage so purchased my current WJ. I have been running the WJ Jeep for about 6 and a half years and it hasn't been without its night mares. Due to a lack of information being published about this model I will try to add information on here over the next few weeks.
The WJ is assembled from Mercedes running gear and the 2.7 CRD is fitted with a 5 cylinder Mercedes deisel. So its a Chrysler,Jeep,Mercedes.
BUT NOT THIS ONE
Quadra-Trac II (WJ) 1999–2004 W5J400
Oil Fill Capacity: 2.5 pts
Quadra-Drive employed the New Venture Gear NV247 transfer case. This two-speed chain-driven transfer case uses a gerotor, a clutch pack coupled to a hydraulic pump, to transfer torque between the front and rear axles. The transfer case contains three modes, 4-All Time, Neutral, and 4-Lo. In 4-All Time, torque is applied to the rear wheels under normal driving conditions. If the rear axle starts spinning at a higher rate than the front axle, hydraulic pressure builds up in the gerotor and causes the clutch pack to progressively transfer torque to the front axle until both axles return to the same speed. Neutral mode is intended for towing the vehicle. In 4-Lo, the front and rear axles are locked together through a 2.72 reduction gear ratio.
In Quadra-Drive, the NV247 transfer case is mated to front and rear axles containing Jeep's Vari-Lok differentials. Vari-Lok differentials also use a gerotor to transfer torque between the two wheels.
Differentials oil 75w 140 fully synthetic
front and rear + 4 oz of Addative to eacch diff
Oil filter Fram CH9301ECO
Engine oil 10w 40 semi synth
Transmission oil SAE 236.14
MILLERS MILLERMATIC ATF +4 FULL SYNTHETIC much cheaper than the Merc Trans oil
Mercedes ATF p/n A0019894503
Brakes calipers are Akebono for a 1999-2004
Mopar® Transfer Case Lubricant
THIS IS THE ONLY LUBRICANT RECOMMENDED
Mopar® P/N 05016796AB
I had a ECU fault and my Jeep stopped changing gear. It would stay in limp mode for a while. I booked it into the Dealer and paid £186 to find out what i already new.
The dealer wanted £2500 for a new ECU and he thought i was going to pay it. I sent my ECU of to be re-furbed at a cost of £320 and its been perfect ever since.
From what i understand this is not a common problem on WJs..
Get your ECU refurbed or replaced
Unit 11 Wessex Trade Centre
Changing the transmission filter
Copyright Kent Royce © 2013
6 cylinder 4 Ltr petrol was a bit to thirsty for me. First class drive and great performance but drinks to much.
The only problems i had with this Grand Cherokee was cracking exhaust manifold in a very short time. The replacement has been modified now but still an expensive job to have it replaced.
Grand Cherokee ZJ
Grand Cherokee WJ
Retrieving engine fault codes:
Turn the ignition key until the digital odometer displays, repeat three times in succession and then back to "On" (On/Off, On/Off, On/Off, On). At the fourth "On" the odometer will be replaced with codes. If no codes are present then "Done" will appear.
After three good trips the MIL is extinguished and the Task Manager automatically switches the trip counter to a warm-up cycle counter. DTCs are automatically erased following 40 warm-up cycles if the component does not fail again.
DTCs can be erased anytime with a DRB III. Erasing the DTC with the DRB III erases all OBD II information. The DRB III automatically displays a warning that erasing the DTC will also erase all OBD II monitor data. This includes all counter information for warm-up cycles, trips and Freeze Frame.
Front axle usually takes 1.2 Lts of fluid. The rear axle depends on which axle you have: Dana 35 takes 1.7 Lts and Dana 44 takes 2.3 Lts.
WJ Power distribution center
Power distribution centre
Junction block front under bonnet
FILTER SEAL CAUTION (545RFE):
The primary transmission oil filter seal MUST be fully installed flush against the oil pump body. DO NOT install the seal onto the filter neck and attempt to install the filter and seal as an assembly. Damage to the transmission will result. Install the new primary oil filter seal in the oil pump inlet bore. Seat the seal in the bore with the butt end of a hammer, or other suitable tool. Place replacement filter in position on valve body and into the oil pump. Install screw to hold filter to valve body. Tighten screw to 40 in. lbs. torque.
CHECKING THE TRANSMISSION FLUID LEVEL:
All WJ transmissions have a dipstick to check oil level. It is located on the left side of the engine near the turbo. The dipstick cap and fill tube should be wiped clean before checking fluid level. Dip stick available on Ebay for a few pounds.
MODEL 45RFE or 545RFE: (used with V8 engines only)
1. Transmission fluid must be at normal operating temperature for accurate fluid level check. Drive vehicle if necessary to bring fluid temperature up to normal hot operating temperature of 82°C (180°F). The torque converter fills in both the P (PARK) and N (NEUTRAL) positions.
2. The engine should be running at idle speed for at least one minute, with the vehicle on level ground.
3. Apply parking brakes.
4. Place the selector lever in P (PARK) to be sure that the fluid level check is accurate.
5. Clean top of filler tube and dipstick to keep dirt from entering tube.
6. Remove dipstick and check fluid level as follows:
(a) Correct acceptable level is in crosshatch area or area between "COLD" and "HOT".
(b) Correct maximum level is to "HOT" arrow mark.
(c) Incorrect level is at or below "COLD" line. The fluid level will be approximately at the upper COLD hole of the dipstick at 70° F fluid temperature.
(d) If fluid is low, add only enough Mopar ATF +4 Automatic Transmission fluid to restore correct level. Do not overfill.
WJ 2.7 CRD Gearbox Reset
As intelligent CRD owners (well hopefully!!) you may be aware that the tranny "learns" your driving style over a period of time and adapts throttle response and change points accordingly.
Therefore if you drive like Miss Daisys chauffeur then it it will soften throttle response and lower change point and alternatively if you drive like Lewis Hamilton the reverse will happen.
Now the problem is that if you have had the car along time without a throttle reset it would have absorbed a lot of info about your driving style (or the previous owner) which although quickly learned by the car takes along time to change. Also small elements of this info can be corrupt causing uneven or jerky throttle response or uneven idle or the even inability to obtain top speed (largely irrelivant on our vehicles i guess).
So why not delete the lot and start again. Nothing so easy as disconnecting the battery our our cars.... far too German for that!!
What you do is;
1) Switch OFF the climate control and radio.
(2) Close ALL doors.
(3)Turn Ignition key to all dash lights ON position(not as far as start though)
(4) Press and hold the accelerator to the floor for 20 seconds.
(5)with Accelerator still to the floor, turn the key to the OFF position DONT REMOVE IT YET.
(6) Slowly lift your foot off the accelerator.
(7) Sit for 2 minutes DONT TOUCH ANY SWITCHES.
( Remove the ignition key and exit the car.
Now you may feel no difference at all in which case be happy that the throttle is as good as it could have been. Or you may notice changes. Many people clain more power - this is rubbish but it just feels liketheres more because the throttle responce is better in the top few mils of pedal travel. I noticed this but as I drive quite gently most of the time on my comute to work it will soon learn "Miss Daisy" mode again. The one thing I did notice was my smoother idle. Used to wobble a bit when stationary and not in drive. Never worried me as it was on about a 50 rpm wobble but it has gone now and idles a rock solid 750 rpm hot or cold no matter what.
Any way, dont try it if you dont want to or do if you want. What have you got to loose.
2.7 crd engine oil change + filter requires 6.5 ltrs
Coolant capacity 14 ltrs
View of thermostat on the 2.7 CRD
If your temprature gauge is only showing 70 deg you may need a new thermostat. Temprature should be 86 to 90 deg
Parts replaced so far
65.304 miles Transfer Case oil changed 30/8/09
74.875 miles 4 new tyres 15/1/11
OIL & Filter changed every 5000 miles
76.840 miles new front pads and disks 21-5-11
New thermostat oil & filter 88.730 miles 16/3/13
WJ manual download