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Old 07-09-2018, 05:12 PM
Trent and his Rover Trent and his Rover is offline
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Our transfer case large nut located on the back of the lt230 is leaking. Pulled the brake drum off and removed the case holding the shoes. Looks like there might be a seal there that may need replacing. Anyone know about its size, #, ease of replacement? Thanks in advance.
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Old 07-09-2018, 05:59 PM
Jeff Blake Jeff Blake is offline
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That's the intermediate shaft. Both ends have an o-ring and are prone to leaking. Either the o-ring fails, or the shaft wears the hole in the casing ovally. Latter can only be fixed with a new casing or sleeving your casing (see Ashcroft transmissions, this would entail a full rebuild..)

https://www.ashcroft-transmissions.c...ed-casing.html

I never understood how the hole is prone to wear though... the shaft doesn't spin

I think you can get a new o-ring into the front end without tearing about the box, but I don't think thats the case with the one in the back where the nut is.

I just finished rebuilding my transfer case, and I smeared in some gear oil RTV on both ends to hopefully prevent any leakage... you may want to try that? The shaft doesn't spin, so it couldn't hurt
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Old 07-09-2018, 06:02 PM
Jeff Blake Jeff Blake is offline
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Here are some pics so you can see what I did. The gray stuff is the RTV
Attached Images
File Type: jpg C9Xn+qZnSnuwZsA%GBmJ%A.jpg (200.2 KB, 25 views)
File Type: jpg ltEkF7MsQV2p6WjodlihRw.jpg (141.6 KB, 22 views)
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Old 07-09-2018, 06:29 PM
Trent and his Rover Trent and his Rover is offline
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Thanks for your info but we may be discussing two different areas. The large bolt found underneath the rear driveshaft interface is where our leak is. Looks like your discussing support bolt for the transfer case intermediate gears.



If I were to take a guess, I'd say that the seal at the transmission spline may also be the same size as the leak area we are experiencing. Rather not guess, hence our request for help. Attached is a pic of our leak. Thanks.
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File Type: jpg image_123923953.jpg (177.3 KB, 19 views)

Last edited by Trent and his Rover; 07-09-2018 at 06:45 PM.
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Old 07-09-2018, 06:59 PM
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German Gruner German Gruner is offline
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You need seal FTC4939. Yoke surface shall be checked, in order to eliminate risk from damage of new seal.

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Old 07-09-2018, 07:04 PM
Trent and his Rover Trent and his Rover is offline
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Thanks, that's it!



Also found this: https://www.youtube.com/watch?v=RiVlImA6Tr4
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Old 07-09-2018, 07:08 PM
Jeff Blake Jeff Blake is offline
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Ah, yes, that's FTC4939. I'd recommend to pick up a new flange kit, https://www.lrdirect.com/LR055719-Kit-Flange/ but toss the included seal for a Corteco. Kit includes a new felt washer which needs to be replaced as well.

When installing the seal it's very important to not damage the lip. Large sockets are usually too thick
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Old 07-09-2018, 08:40 PM
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Jimmy Jimmy is offline
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I recently replaced that seal and felt washer on mine. No more leaking from it. It's easy to do.

Either replace the output shaft/yoke nut with a new one (it uses a nylon lock) or use thread locker. I found the nut was loose on mine.
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