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    BW65 fluid capacity?

    Please can somebody advise me regarding this? I have searched but haven't been able to find the definitive answer - all I found was a comment on FB that the 65 takes 5.4L, whereas the 35 takes 8.0L. I'm just putting fluids in, getting ready to fire up the rebuilt engine - the transmission has been fully overhauled so will be completely empty of fluid, except for maybe a small amount in the cooler.

    Thanks in advance - Dave


    #2
    According to the Haynes manual the "Automatic transmission", which would have been for the 65, it is 6.5 litres. Presumably this would include the torque convertor and cooler?
    I bet someone out there has the definitive answer.
    Mike.

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      #3
      I had been looking at my downloaded version of the ROM, which only covers the 35, and forgot about my Haynes manual. Now I look it does in fact state 5.4L for the 65.

      Comment


        #4
        The 77 Rom confirms that.. 5.4L for the 65..
        Last edited by trunt; 19 July 2021, 12:34.
        Terry Hunt, Wilmington Delaware

        www.terryhunt.co.uk

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          #5
          I've just had my 65 rebuilt, I was advised to put 1 litre in the torque converter and then, once fitted, add 6.5 to 7 litres, nearly 8 litres in total.

          Comment


            #6
            Crikey - some varying opinions here.... I have put 5.0L in so far, and it's right up the stick. I guess I'll see where it's at after I've had the engine running and let the stuff pump around a bit.

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              #7
              A suction pump helps to easily remove a bit if it is overfilled. ‘Pela’ brand is what I bought…. It’s been very useful. No need to grovel if you don’t have a ramp
              There are 2 secrets to staying on top :- 1. Don't give everything away.
              2.

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                #8
                Even more confused now....today we fired up the engine for the first time since it was rebuilt - yay! However, on checking the trans fluid after running the engine for a few minutes it wasn't registering on the stick at all. Added a bit more fluid - now at 5.4L per the Haynes manual - but still not on the stick. At this time I have put an approximate total of 6.4L in and the level is just nudging into the "cold" area on the stick. In case anybody is thinking that maybe I have a BW35, not 65 - no. it's definitely a 65.

                ?

                Comment


                  #9
                  This Service Bulletin (in the Technical Section) was issued when the BW35 was the normal Stag box, but it may well apply to the BW65:

                  https://www.socforum.com/forum/forum...king-procedure
                  Dave
                  1974 Mk2, ZF Auto, 3.45 Diff, Datsun Driveshafts. Stag owner/maintainer since 1989.

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                    #10
                    Thanks Dave - yes, I have seen that, however the car is not yet in any shape to drive any distance.

                    Comment


                      #11
                      Originally posted by Davo1805NZ View Post
                      Even more confused now....today we fired up the engine for the first time since it was rebuilt - yay! However, on checking the trans fluid after running the engine for a few minutes it wasn't registering on the stick at all. Added a bit more fluid - now at 5.4L per the Haynes manual - but still not on the stick. At this time I have put an approximate total of 6.4L in and the level is just nudging into the "cold" area on the stick. In case anybody is thinking that maybe I have a BW35, not 65 - no. it's definitely a 65.

                      ?
                      You also are filling up the oil cooler and pipework.

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                        #12
                        Hmm.. Haynes says 5.4L for Type 65 auto transmission with oil cooler. I wouldn’t expect them to be excluding the torque converter?

                        Comment


                          #13
                          Dave.
                          You are going the right way about it. The quoted capacities are very vague. Do they include the torque converter and cooler, or not? I am surprised there is not some more accurate information available somewhere.
                          If you keep topping up a bit at a time, running the engine, and selecting through the gears one by one, the level will eventually stabilise, then a short run should clear out any air left in the system.
                          Hopefully you will have kept a careful note of how much fluid it finally took, for the future benefit of the rest of us!
                          Mike.

                          Comment


                            #14
                            I would guess around 7 - 8 litres as the Stag uses the large case 11" converter. You don't need accurate info as you have a dipstick. The procedure we use & have done since I started in the auto gearbox trade in1979 is:-

                            (Before you fit the gearbox there should be no oil in the cooler because you will have cleaned it out - won't you? If not then you will send dirty oil straight into you new transmission.)

                            Add 3 litres (no need to add oil to the converter, that just makes a mess!), start engine DO NOT REV IT. Let it idle for 5 - 10 seconds. Switch off.

                            Add another 3 litres, start engine leave at idle & run the selector through from P to 1 a couple of times pausing for a couple of seconds in each range. Leave engine running. You should have some drive now.

                            Add oil to the correct level on the dipstick. If difficult to get a clear reading leave it for 5 mins to let the majority of the oil drain from the insides of the dipstick tube, sometimes you cannot get a clear reading due to splash (much worse on the BW35) in which case have the dipstick ready, kill the engine & dip immediately. Set level to the bottom mark on the stick then check again when hot & set it to the top mark.

                            I'm sure there are others on here that will know better though - there nearly always is!!
                            Auto transmission rebuilding since 1979 - for my sins!

                            Comment


                              #15
                              Isn’t that the Facebook fanny club Geoff?

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