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Auto Transmission Flush - Clarification on Technique Needed 850 1995

posted by  someone claiming to be Nathan on  Sat Feb 24 00:09 CST 2001 [RELATED]

Hey Guys,

I will soon flush my transmission fluid and replace with synthetic ATF (Mobil or Amsoil). I will use the method as posted here and Bay 13.

My question is this: Can you just leave the engine running and simply add new ATF fluid during the process?

I.E. - instead of waiting for the tranny to pump air and shutting down the engine to add more ATF, why not just have your ATF ready to go and add while the tranny pumps out the old?

Just seems a little more efficient to do this way.

Any thoughts or suggestions are most welcomed.

Also- as Synthetic ATF is price precious, how many quarts do you really need? Seems I have seen posted anywher from 11 to 18 quarts of new ATF fluid are required for a clean flush.







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    Re: Auto Transmission Flush - Clarification on Technique Needed V70-XC70 1998

    posted by  someone claiming to be Reinhard on  Sat Feb 24 11:50 CST 2001 [RELATED]

    Hi Nathan

    I became recently a V70 owner. The shifting of my transmisson is terrible. So that is exactly my next project. One question I am having is what tool are you planing to use to remove the clamp on the radiator?

    Reinhard

    V70GLT98







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      Re: Auto Transmission Flush - Clarification on Technique Needed V70-XC70 1998

      posted by  someone claiming to be Doug on  Sat Feb 24 13:11 CST 2001 [RELATED]

      I used a pair of needle nose pliers that I inserted into the clamp and then opened up. Getting this clamp on and off is the toughest part of the operation.







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        Re: Auto Transmission Flush - Clarification on Technique Needed 850 1996

        posted by  someone claiming to be Garth Gullekson on  Sun Feb 25 03:24 CST 2001 [RELATED]

        The best tool for clamp removal is a pair of snap ring pliers. These pliers have skinny round ends. There are various size pliers, so to ensure you get the right fit you should buy up a hose clamp first and bring it along when you are shopping for the pliers. When you buy the hose clamp, it's not a bad idea to pick up an o-ring as well just in case you damage that during the procedure. The pliers come in two types, internal and external. You want an external type. With external pliers, when you push the handles together with your hands the ends of the handles move out rather than in.

        Garth







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          Re: Auto Transmission Flush - Clarification on Technique Needed 850 1996

          posted by  someone claiming to be Nathan on  Sun Feb 25 03:39 CST 2001 [RELATED]

          What tools /parts are required should I decide to do a complete flush from the bottom cooler hose going into the transaxle?

          Just a wrench to disconnect the fitting to the transaxle? Any "O" ring involved or other parts to have on hand?

          Thanks for the tools and info on the top hose!







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            Re: Auto Transmission Flush - Clarification on Technique Needed 850 1995

            posted by  someone claiming to be Ching-Ho Cheng on  Mon Feb 26 01:54 CST 2001 [RELATED]

            Nathan,

            I did mine using the bottom cooler hose going into the transaxle. In my 95 855, the hose was connected to the transaxle by a union (2 nuts). They were 22mm nuts. I used TWO 22mm wrench to unlose the union nuts. There was NO o-ring involved. I had to remove the plastic undercover right below the radiator to gain more room and leverage to undo the union nuts.

            Hope this help.

            Ching-Ho Cheng







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            Re: Auto Transmission Flush - Clarification on Technique Needed 850 1996

            posted by  someone claiming to be Garth Gullekson on  Sun Feb 25 12:19 CST 2001 [RELATED]

            Sorry, but I don't have any experience with the bottom cooler approach to flushing.

            Garth







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    Re: Auto Transmission Flush - Clarification on Technique Needed 850 1995

    posted by  someone claiming to be Paul Seminara on  Sat Feb 24 02:02 CST 2001 [RELATED]

    I have found a case to be about perfect. Sometimes 1 qt left over. If your fluid isn't too bad a 12 qt case should do you, but make sure you go through the gears and top up.

    The AT pump goes pretty quick. Doesn't seem like pouring into a funnel fills fast enough. If you can enlist the aid of a lovely assistant, you can give it a shot. Establish some verbal commands :)

    Good on you for doing it yourself!!!







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      Re: Auto Transmission Flush - Clarification on Technique Needed 850 1993

      posted by  someone claiming to be Bou Bou on  Mon Feb 26 02:18 CST 2001 [RELATED]

      Paul,

      In your earlier post, you mentioned "make sure you go through the gears and top up fluid". I assume you mean after the flush is complete. In other words, it is not necessary to shift through the gears while you are performing the flush because even in park the torque converter is turning and the fluid is circulating via the trans pump through the entire trans, including the valve body and gears - Right? Thanks for your clarification. Also, will 14 quarts via the top trans line give me a complete flush (except the cooler of course)? My thanks to you and all the good people here at Brickboard - what a great forum!

      Bou Bou

      1993 850 GLT 143,000 miles and going strong.







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        Re: Auto Transmission Flush - Clarification on Technique Needed 850 1993

        posted by  someone claiming to be Paul Seminara on  Mon Feb 26 02:29 CST 2001 [RELATED]

        Actually I meant both. There are different pathways for old fluid to linger for the different gears, and it wouldn't hurt if careful WITH PARKING BRAKE ON AND FOOT FIRMLY ON BRAKE PEDAL to go through the gears once. It's sorta a pain and not really required, butt I tend to be anal about these things.

        Then top up at the end as well after going through the gears.

        14 qts should be enough.







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          Re: Auto Transmission Flush - Clarification on Technique Needed 850 1993

          posted by  someone claiming to be Bou Bou on  Mon Feb 26 03:24 CST 2001 [RELATED]

          Paul,

          Thanks for your prompt response. Did you flush your trans cooler also, or did you just do the top hose flush? Do you think it's really worth the extra hassle to flush the cooler, and how much more trouble is it anyway?

          Thanks,

          Bou Bou







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            Re: Auto Transmission Flush - Clarification on Technique Needed 850 1993

            posted by  someone claiming to be Paul Seminara on  Mon Feb 26 03:46 CST 2001 [RELATED]

            I guess it depends on how dirty the fluid is. If it's pretty clean and fresh I wouldn't sweat it.

            Well since my wife's 850 is an M56 with 46K we haven't changed the manual tranny fluid yet. Volvo recommends a special Volvo fluid which I have not had analyzed (nor have I even bought or seen)

            My neighbor's 850R had some pretty dark AT fluid, he disconnected both fittings as I recall (this was a few years ago) and blew it out (carefully) with compressed air and a product call Dr. Tranny aerosol cleaner from www.lubegard.com







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    Re: Auto Transmission Flush - Clarification on Technique Needed V70-XC70 1998AWD

    posted by  someone claiming to be Doug on  Sat Feb 24 01:57 CST 2001 [RELATED]

    I did mine a month ago using non-synth ATF, 13 quarts. You won't fill it fast enough via the fill tube to keep up with the pumped out quantity. It pumps out about 2 quarts in 20 seconds. Try to get that down the fill tube and you'll have a mess everywhere.

    Now, my brick shifts smoother, especially the downshift from overdrive. I had 38K miles on mine when I did the change.

    FYI, it's not clear in the Bay13 directioins, but the ATF pumps out of the upper hose into the cooler, so attach your drain hose to the upper hose, not the cooler fitting. I didn't break my clip either, but had a spare one and a spare O-ring too just in case.







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    Re: Auto Transmission Flush - Clarification on Technique Needed 850 1995

    posted by  someone claiming to be Wayne on  Sat Feb 24 00:30 CST 2001 [RELATED]

    I flushed my tranny last summer using this method and it works great. I think the reason you shut the engine down to add fluid is that it pumps quicker than you can fill. You also want to make sure you don't overfill. I think you will need 10 or 11 quarts- that's what I used. Also, make sure you have a spare retainer clip for the tranny line- they break easily.






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