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  4. Diff fluid pump

Diff fluid pump

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  • 6670charger6
    6670charger6
    6670charger
    wrote on last edited by
    #1

    Need to change the fluid in my diff. Looked up several DIY's for it and it seems pretty simple. My only question concerns putting the new fluid back in. I keep seeing references to pumping it back into the top hole, but, not sure what I'd pump it with. Anyone have any suggestions?

    Thanks.

    88 325ic, Cirrus Blau; 120,000 miles

    66 Dodge Charger, red/black, mileage unknown

    Appleton, WI

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    0
    • m42b32M
      m42b32M
      m42b32
      wrote on last edited by
      #2

      When I changed my diff mount (I removed the diff cover so I had to drain the fluid) I used a longish piece of clear flexible tubing pushed onto the end of a funnel. I ran the tubing from the fill hole up out the top of the passenger side rear wheel-well and had a friend pour the fluid into the funnel while I held the other end in the fill hole. It worked quite well actually

      1991 318is, 1991 318i, 2022 Bronco

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      • wasnt m3W
        wasnt m3W
        wasnt m3
        wrote on last edited by
        #3

        You can buy pumps specifically for this at Auto Zone for $8. Threads right onto the diff fluid container.

        m3sig-1.jpg

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        • jc43089J
          jc43089J
          jc43089
          wrote on last edited by
          #4

          wasnt m3 said:

          You can buy pumps specifically for this at Auto Zone for $8. Threads right onto the diff fluid container.

          This, they look like a hand soap pump but bigger.

          Sent from my potato phone

          2/94 325i Sedan, Arctic Gray: UUC LTW FW, EVO 3 and DSSR, +.020 Maxsil pistons, ASC delete, Eibach shocks/springs, 16" contour reps 238k
          3/93 325i Coupe, Schwarz 2, Sketchy stance action, ebay turbo, 300k
          '89 325i Vert, Alpine White: 5spd swapped, sold.

          '04 Toyota Sienna: 24V to 24V swap in progress

          '05 Volvo V70R, 6spd.  200k
          '85 Toyota LandCruiser: Lifted, gas hog. 205k
          '99 Nissan Maxima: 5spd, Rusty but trusty winter beater. 252k RIP.

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          • m42b32M
            m42b32M
            m42b32
            wrote on last edited by
            #5

            I should mention that my solution was done in a pinch, it was really late at night and I had forgotten about those pumps haha

            1991 318is, 1991 318i, 2022 Bronco

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            • B
              B
              Boris3
              wrote on last edited by
              #6

              Unless you're using Redline... or maybe I've just had bad luck. Pumps never seem to fit.

              To the OP one key thing in changing diff or tyranny fluid if you've never done it before. Make sure you can open the fill plug before you remove the drain plug.

              1990 325i racecar (ITS, former Spec E30); 2004 330i ZHP

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              • M
                M
                michael1972
                wrote on last edited by
                #7

                Boris3 said:

                To the OP one key thing in changing diff or tyranny fluid if you've never done it before. Make sure you can open the fill plug before you remove the drain plug.

                This

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                • Bassboy3313B
                  Bassboy3313B
                  Bassboy3313
                  wrote on last edited by
                  #8

                  I just use a hand transfer pump from advance auto like this one. one tube goes into the diff fluid bottle and the other into the fill hole on the diff. You could even drain it this way too I suppose, just reverse the hoses.

                  MTY-MV7241-Fluid-Transfer-Pump.jpg

                  CHECK OUT >>> RAGE DRIFT DESIGNS <<< FOR DECALS AND MORE!

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                  • 6670charger6
                    6670charger6
                    6670charger
                    wrote on last edited by
                    #9

                    Thanks all. Found a pump like the ones a few of you mentioned at Auto Zone. Now to pick up some fluid, and then make sure I can get the two plugs out before I start.

                    88 325ic, Cirrus Blau; 120,000 miles

                    66 Dodge Charger, red/black, mileage unknown

                    Appleton, WI

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                    0

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