Question about 1998 Jeep Wrangler

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I am wanting to install a transmission in a 1998 jeep wrangler se. 4.0 cyl 2.5 liter I will need to take out the old one first. I've never done it before and any help would be great

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  • dttech
    dttech Mar 25, 2011

    You couldn't have picked an easier "First"...The only problem is that you failed to mention if it is an automatic or standard transmission.

  • jonathanah Mar 25, 2011

    It's a manual.. Sorry I left that out.

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2 Answers

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  • Master
  • 4,803 Answers

If your Jeep is not equippedwith 4 wheel drive, just skip over the parts about the tranfer case.

Transmission and Transfer Case Removal

NOTE: to prevent damage, remove Crankshaft Position Sensor (CKP) prior to transmission removal

1. Place transmission in first or 3rd gear
2. Raise and support vehicle
3. Disconnect exhaust system components
4. Remove skid plate if equipped
5. Remove clutch slave cylinder from clutch housing
6. Mark front and rear drive shafts, transfer case yokes and differential yokes for installation alignment
7. Remove drive shafts
8. Disconnect wiring from transmission and transfer case
9. Disconnect transfer case and transmission shift linkage
10. Remove speedometer cable
11. Remove transfer case vacuum lines
12. Remove nuts attaching transfer case to transmission
13. Remove transfer case
14. If not already removed, (See note above) remove Crankshaft Position sensor
15. Disconnect transfer case vent hose
16. Support transmission with a jack
17. Disconnect rear cushion and bracket from transmission
18. remove rear crossmember
19. Lower transmission approximately 3 inches for access to shift lever
NOTE: DO NOT remove shift lever from floor pan boot.
20. Reach up and around transmission and slide boot upward on shift lever. Disconnect shift lever by pressing downward and turning retainer counterclockwise (as viewed from above)
21. Lift shift lever and retainer out of transmission shift tower
22. Remove clutch housing-to-engine bolts
23. Remove transmission
24. Reverse procedure to install

Posted on Mar 26, 2011

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  • Jeep Master
  • 6,982 Answers

Instructions vary depending upon if its a stick or automatic transmission. Your best bet if you haven't ever done anything like that is to get yourself a chilton or haynes manual. Both have text and pictures to help with the job. With hanynes, you may need the transmission manual instead of the regular repair one if its an automatic...check the contents before you buy it.
When doing an automatic, it's advisable to remove the crank sensor from the bellhousing as often they get damaged accidentally when working in there. If you need to remove the flywheel, make sure you mark it's position so you can put it back exactly the same way it was installed.
Make sure you have a flat solid area to work on. Transmissions need to be supported so notheing get's damaged. To do that, you need a place where you can move a jack easily. If you need to work on dirt etc, buy a sheet of 5/8" plywood to put underneath.

Posted on Mar 25, 2011

  • Richard Scordino Mar 25, 2011

    Stickshift transmission is easier to replace than an automatic, however, if you attempt to remove the transmission and do not have a real transmission jack be aware that removing the trans and transfer case as one unit is dangerous because of their combined weight. Quite often you can rent a jack. If you can't, I suggest that even though it's more work, separate the transfer case from the transmission first so it is more manageable. When putting the transmission back in, find two long bolts of the same thread size as the ones that hold the trans to the bellhousing.
    Saw the heads off those bolts and screw them into two of the holes for the original bolts and use them as guide pins to locate the transmission as you slide it back in. If the unit does not want to engage with the clutch, put the transmission in any gear and turn the output shaft so the front shaft turns and engages the clutch splines. Never force it or you will damage the clutch. Always re-check fluid level when finished.

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