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  1. T

    LMTV Front Diff Pinion Seal

    Hi Mainiak, Of course that pulling jig is generic, copy as you please. I did the job the harder way the first time, when the pictures were made. Don't work so much under the truck. Remove the nose of the differential (the pinion bearing housing) and bring it to the bench to use the jig to pop...
  2. T

    LMTV Front Diff Pinion Seal

    I hope this is the final chapter in the blown seal saga. Today was warm and sunny (a rarity this winter) and I was determined to find the vent on the front axle. Following the hoses again it became obvious I had jumped the track on earlier tracing of the hose, and this time I found the vent...
  3. T

    LMTV Front Diff Pinion Seal

    After changing out the second blown front pinion seal, the cause of seal being destroyed is obvious. When I pulled the original bad pinion seal (A1205U2257) I thought the secondary seal (A1205F2502) was missing. It was not missing, it was completely destroyed. When I pulled the replacement...
  4. T

    LMTV Front Diff Pinion Seal

    There is now a tube coming from the front diff into the cab, and a pressure gauge on the dash. I will see if there is pressurization when I take the truck out for a parade tomorrow. If I come home with a lap full of differential lube you can all have a laugh. So far the CTIS has cycled a...
  5. T

    LMTV Front Diff Pinion Seal

    The front pinion oil seal has blown out again. The seal is completely intact but was blown out of the pinion bearing housing. It was stopped by the yoke/flange. The sealing surface was still seated on the surface of the flange nose. The seal was a tight, drive-in fit when installed so I am...
  6. T

    LMTV Front Diff Pinion Seal

    Got the pinion seal changed today. I've made some notes and taken some photos in case someone else has to do it. Yesterday, in preparation to pull the flange/yoke, I made up a puller to allow use of a hydraulic jack. Thanks NDT for the warning so I could be prepared. The job went well with a...
  7. T

    LMTV Front Diff Pinion Seal

    Followup: the seal has not leaked again. I got to wondering if the leak (which happened in a very short time on the coolest morning this fall) might have been caused by pressurization of the axle. If the axle got pressurized, fluid could have been blown out. Went looking for a vent cap...
  8. T

    LMTV Front Diff Pinion Seal

    Ughhhhh. I am not looking forward to that! Thanks for the warning. Last night a friend with an LMTV pre-warned me that even the caps on the U-joints can be difficult to remove.
  9. T

    LMTV Front Diff Pinion Seal

    My front diff puked out most of it's lube on a short drive (1994 S&S LMTV) . The pinion seal blew and the protective shield on the yoke acted as an oil slinger and threw oil all underneath even on the tires. Had to clean it up before source was found. I'd like to have a replacement seal...
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