How To Change Oil Transmission Jeep Tj

1. Park on level basis and place an oil grab pan underneath your transmission. If you lot have an oil pan skid plate like me, you volition first need to completely remove information technology before y'all tin go along.

2. Place an oil catch pan underneath your transmission. Using a 17mm Allen Bit, remove your NV3550 transmission fill up bolt which is located on the driver side of your Jeep. Then, slowly remove the drain bolt using the same 17mm bit and so you practise not to drop it in the oil catch pan. The transmission volition drain quickly and forcefully brand sure you are out from nether it.

iii. The inside end of your bleed bolt has a small magnetic tip which is used to collect fine metal filings. Clean off this magnet and take some time to inspect the pieces advisedly. Fine particles will stand up like pilus and this is normal, big chunks are Not.

4. Once drained, re-install your drain bolt making sure to torque it to factory specifications. My 2000 FSM has 14-twenty ft. lbs. indicated as the proper torque setting.

5. Now it time to refill your NV3550 Transmission. Open up your bottle of Mopar Manual Fluid, attach your canteen pump to it, insert the hose into the fill pigsty on your transmission and start pumping. You will need well-nigh ii bottles to fill it up and keep pumping it in until it starts to ooze out of the fill pigsty. Be certain to do this on level ground or else y'all may not put in the proper amount.

6. Keep filling the transmission until fluid starts to ooze out, re-install the fill commodities and be sure to torque it downwardly to 14-20 ft. lbs. like the drain commodities.

NP231 Transfer Example Service

On a TJ, there is a proper way to service your NP231 transfer case and a lazy mode. On an XJ, you do not need to worry near this as there is no transfer case skid plate in your way to deal with.

The proper style (lazy mode follows this):

This is what your NP231 Transfer Example looks like (shown on a TJ) from under the back of your Jeep. I accept indicated where the make full and drain bolts are located in the pic to the left. Delight annotation that some NP231's take different types of bolts used here.

one. On a TJ, you will need to remove the transfer case slip plate to service the NP231 Transfer Case. To do this, remove the 4 nuts securing your transmission mountain to the transfer case skid plate using a i/2" socket.

2. Place a jack stand underneath the bell housing of your transmission. So, using a flooring jack with a piece of 2x4 on top of information technology to assist distribute the load, lift the center of your transfer case skid plate upward until it puts a lilliputian pressure on it.

3. Remove the 6 bolts securing your transfer case skid plate to your Jeep'due south frame rails. On a 1997-2002 Jeep TJ, you lot will need a 3/iv" socket. 2003+ TJ's utilize a metric bolt that is like in size just I do non know what information technology is. A breaker bar volition come up in handy here and if you live in the rust belt of America, some PB Blaster on the bolts will help out a lot.

4. With the bolts removed, slowly lower your floor jack just a piffling and make sure that your manual bell housing is at present resting on meridian of the jack stand up. So, grab the lip of the transfer case slip plate and roll the whole thing out from under your Jeep. Ready your skid plate bated for now.

v. As I mentioned before, I have seen the NP231 Transfer Case come up with 2 unlike types of make full and bleed plugs. One requires a 30mm socket to remove and the other uses a 10mm Allen bit. Make up one's mind which you will demand and remove the fill bolt.

6. Place an oil grab pan under your transfer case and and then remove the lower drain bolt again using the same 30mm socket or 10mm Allen bit that you used for the make full bolt.

7. Allow your NP231 Transfer Example to drain completely before proceeding.

viii. In one case drained, re-install the bleed plug and tighten information technology to 15-25 ft. lbs. of torque.

9. Using a yorker spout on the bottle or a bottle pump to assist you, fill up your transfer example with ATF+3 until it begins to ooze out of the make full pigsty and so re-install the fill bolt making sure to tighten information technology down to 15-25 ft. lbs. of torque. (Photo as shown on an XJ)

10. Put your transfer case skid plate back on top of your floor jack and stabilize it by holding it with one hand. Roll it underneath your Jeep and jack it upward into place.

ix. Re-install the 6 bolts that concur the skid to the frame but finger tight so that information technology can all the same motility around a bit. At present, re-install the transmission mountain basics. As mentioned, you may need to shift your skid plate around in society to line up the holes. The transmission mount nuts will need to exist tightened to 40-45 ft. lbs. of torque.

10. Secure the 6 sideslip plate bolts to factory bolt to 44-55 ft. lbs. of torque. Remove your jacks, clean upward your mess, re-install your oil pan skid plate and you lot should be washed.

The lazy way:
Just so you all know, the first time I serviced my Jeep TJ'due south NP231 transfer instance, I did it the proper way equally explained above. Notwithstanding, the 2nd time around, I was pressed for daylight and time and came up with this method.

Anyway, all y'all need to do is skip all the steps involving the removal and installation of your skid plate and just drain your transfer example directly into information technology.

Fortunately, the skid plate has a recessed section directly underneath it with (4) drain hole in information technology. I just placed an oil pan directly under these holes to collect the fluid and and so wiped downwards the skid plate with some rags when finished. Takes a fraction of the time to practise.

When finished, please take your used transmission and ATF fluid to your local auto parts store to take it disposed of properly.

Source: http://www.billswebspace.com/TJTrans.htm

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