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Differential Pinion Seal Replacement

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  • Rear Axle: Differential Pinion Seal Replacement

    My GT Hawk has started leaking badly from the front pinion seal....should I take it to a professional or try it my self....I'm only a half-xxxed mechanic* myself but have a friend who thinks he and I can do it in my garage.....anyone with some experience?....what would you recommend?

    *and poor one at that.
    Lou Van Anne
    62 Champ
    64 R2 GT Hawk
    79 Avanti II

  • #2
    I think that it is something you can get done, if you have a way to get it jacked up, and put on stands/ car ramps, for safety. You just pull the driveline, then big nut on yoke, pull the yoke off, then the seal. It helps to have a seal driver, to install the seal, but can be done without. Put some light grease on the yoke to help it slip through the new seal, and torque the nut on the yoke. install driveline. After it's back on the floor , top of the differential with gear lube. Good Luck!

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    • #3
      you'll need to make a tool to hold the yoke still while removing the nut and while reinstalling and torqueing the nut. You can use a pipe wrench to hold the yoke however that is a primitive way in my book and scars the yoke with the jaws of the pipe wrench.
      a good 1/2 impact wrench will assist in removing the nut. Don't try to complete the job without torqueing the pinion nut. this torque is critical as it sets up the pinion bearing preload.

      Originally posted by Lou Van Anne View Post
      My GT Hawk has started leaking badly from the front pinion seal....should I take it to a professional or try it my self....I'm only a half-xxxed mechanic* myself but have a friend who thinks he and I can do it in my garage.....anyone with some experience?....what would you recommend?

      *and poor one at that.

      Russ Shop Foreman \"Rusty Nut Garage\"
      53 2R6 289 5SpdOD (driver)
      57 SH (project)
      60 Lark VIII 2dr sd (driver)

      Comment


      • #4
        Thank You everyone....I'm going to have it done professionally.
        Originally posted by rusty nut garage View Post
        you'll need to make a tool to hold the yoke still while removing the nut and while reinstalling and torqueing the nut. You can use a pipe wrench to hold the yoke however that is a primitive way in my book and scars the yoke with the jaws of the pipe wrench.
        a good 1/2 impact wrench will assist in removing the nut. Don't try to complete the job without torqueing the pinion nut. this torque is critical as it sets up the pinion bearing preload.
        Lou Van Anne
        62 Champ
        64 R2 GT Hawk
        79 Avanti II

        Comment


        • #5
          There was a special tool made for this service... maybe Kent Moore made them. A name I won't reveal here, but someone many of us know.... has all those factory or dealership tools required for full Stude service....I've used some very unique tools over the years to get the job "easily" done..... On your pinion seal replacement.... make sure your mechanic friend knows the term "redi-seal......I would give this job to a Jeep guy or let it drip into a baking pan.......

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          • #6
            Got a quote from "Valley Differentials" here in Stockton: $100 an hour, about one hour to replace the pinion seal and the cover gasket, + parts.....not going to try it myself....too damn old!
            Lou Van Anne
            62 Champ
            64 R2 GT Hawk
            79 Avanti II

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            • #7
              I hear ya Lou, happens to us all. Do what you can and farm out the rest to a shop you trust. Luck Doofus

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              • #8
                Not sure how to do it without the Stude Special Tools. Lucky enough to have found the entire inventory of a dealer 30 yrs ago- for $90! If I did not have them, I'd take it to a mechanic. The Dana 44 is so ubiquitous that they should be able to replce it in 30 min.

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                • #9
                  I do many of these a year. 1 hour is a fair quote. However I might have to double my shop rate ������
                  Originally posted by Lou Van Anne View Post
                  Got a quote from "Valley Differentials" here in Stockton: $100 an hour, about one hour to replace the pinion seal and the cover gasket, + parts.....not going to try it myself....too damn old!
                  Last edited by rusty nut garage; 07-08-2017, 06:56 PM.

                  Russ Shop Foreman \"Rusty Nut Garage\"
                  53 2R6 289 5SpdOD (driver)
                  57 SH (project)
                  60 Lark VIII 2dr sd (driver)

                  Comment


                  • #10
                    Repair is made....it took him 45 minutes...charged me $80 plus a $20 for the seal....I'm happy!
                    Lou Van Anne
                    62 Champ
                    64 R2 GT Hawk
                    79 Avanti II

                    Comment

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