T-case output bearing removal - Defender Source
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  #1  
Old September 3rd, 2016, 02:54 PM
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Stephan Laputka
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T-case output bearing removal

Hey guys. Got a wobble on the pinion coming out the front of the tcase. Can the front output bearing be replaced with tcase in the truck or does it have to be pulled?
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  #2  
Old September 3rd, 2016, 03:12 PM
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Step by step instructions without removing the transfer case:
https://www.landyzone.co.uk/land-rov...renewal.81771/
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  #3  
Old September 3rd, 2016, 03:23 PM
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Frank Rafka
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Do yourself a favor, pull the floor and remove the output housing from the t-case. Unless you have a lift, working on the tcase while lying on your back will hours to this...
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Old September 3rd, 2016, 04:23 PM
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Stephan Laputka
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Awesome thanks for the info. Just to be clear, there should be no movement at all in the pinion right? There isn't some minor tolerance that's acceptable?
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Old September 3rd, 2016, 04:32 PM
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Frank Rafka
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explain movement?
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Old September 3rd, 2016, 04:37 PM
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Stephan Laputka
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I got a vibration and grinding I'm trying to track down that's speed related. Mainly over 50 mph. Doesn't matter power on or off. Shafts are all solid. If I grab front shaft near the tcase and shake it, I got a couple degrees of movement from the pinion. I'll try to get a video..
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Old September 3rd, 2016, 04:47 PM
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Old September 3rd, 2016, 05:48 PM
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My front TC bearing has always had some movement, I've owned it since 1999.
I suspect you have a bad U joint and the one at the front of the TC is the one that usually goes bad 1st. BUT I've never trusted the wiggle back & forth thing by hand cause if it's frozen up, it'll feel solid and my bad one felt solid too.

Best way to be sure is to remove the drive shaft from both ends and then test the joints for ease of movement. I'd do both prop shafts to be sure none of them are bad. Be sure to mark the slip joint so that if you pull it apart you can reassemble it exactly the way it came apart for correct balance.
You'll need a 14mm and a 9/16" wrenches (each, combinations) the thinner then better.

The U joints on the D90's really need to be lubed every 5K miles.
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  #9  
Old September 3rd, 2016, 06:48 PM
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I have the truck up on jack stands, everything is loose in the drivetrain and the shafts feel solid. I really don't think it's a u joint. Plus they are both were replaced a year ago and only have 2k miles on them maybe. All the wheel bearings are fine, diffs are fine. I'm thinking its that bearing but it's such a small amount of play... The flanges on the diffs feel bomb proof solid so I'm thinking the tcase is supposed to feel like that and not have the wiggle it does..
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  #10  
Old September 3rd, 2016, 07:00 PM
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Frank Rafka
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That's typical on a lt230...remove the front ds and see if there's more play...just because it's on jack stands doesn't really upload the ds...
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  #11  
Old September 3rd, 2016, 07:25 PM
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Since it's up on jacks, Press & pull in and out on the top of your front wheels to see if the wheel bearings and pivot pins are tight.

Is the ball joint at the bottom of the Pitman arm solid?
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  #12  
Old September 3rd, 2016, 10:54 PM
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Stephan Laputka
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Yes all that is tight. I put it in gear while on jacks with the tcase locked and crawled under to listen and there is some noise coming from the front of the case where pinion is located. I just haven't took the case apart before so I don't know what to look for. So you're saying its normal for the pinion to have slight movement in it? I know it has the brake drum on it but the rear pinion is rock solid.
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Old September 3rd, 2016, 11:10 PM
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The front drive output of the transfer case does have some slight movement, I've read it's because they use a ball type bearing it that location as shown by Dave in post #2 jn this thread.
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  #14  
Old September 4th, 2016, 12:29 PM
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steven stancey
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While we are on this topic. How much play should you have between the two transfer case outputs. Ie. You turn one in one direction, the other in a different...
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  #15  
Old September 4th, 2016, 06:33 PM
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I get about an 8th of a rotation btw the flanges with the diffloc engaged
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Old September 4th, 2016, 06:38 PM
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Frank Rafka
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1/8 to 1/4 is typical...
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  #17  
Old September 4th, 2016, 10:42 PM
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steven stancey
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Thanks. That is what I have. Sorry for hijacking the thread on that question.,. I'm in the middle of putting new seals and output bearings on my t case and was wondering about the slop...
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