TF727 pump fluid repair sleeve

Transmission and Drivetrain

  1. vso737

    vso737 Well-Known Member

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    Has anyone installed a "fluid pump repair sleeve" to prevent the torque converter from draining back into the transmission?

    LG,
    Mike
     
  2. Coyote

    Coyote Well-Known Member

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    Not for that usage. I have used a similar repair sleeve for a worn sbchevy crank front seal. Worked fine. Good luck. Advise how it goes.
    :beep:
     
  3. vso737

    vso737 Well-Known Member

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    Thanks for the response.
    I will be delving into the VALVE BODY first. I purchased the same shift kit that came in the TCI 'street fighter'. I have a feeling the T/C drain back is due to something not right in the valve body.
    I also have the National 99187 speedi-sleeve for the pump in the event that this is what's causing all my problems.
    ONLY TIME WILL TELL. I will definitely post what I come up with.
    LG,
    Mike
     
  4. Russ69Runner

    Russ69Runner Well-Known Member

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    Installing the speedy sleeve. Had to buy a special lock tight when in stalling them on crank shaft's for the oil seal. The lock tight was used on a hat's diesel motor front crank shaft seal area. That the last motor I had to use a sleeve on. About a year ago. It works fine. No leak's.
     
  5. transman

    transman Member

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    If you don't have a shift kit installed in the valve body, you might want to consider this. As good as an old memory serves me, I believe that the TRANSGO kit SKTFSC (its a small improver kit) covered that problem, along with improving shift quality. Again, the old memory cells seem to recall that TRANSGO'S TF-2 & TF-3(full manual kit) also covered that problem. Just something you might want to check out.
     
  6. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

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    I think it's the TF-2 that has an anti drain back feature. Same dead cells
     
  7. transman

    transman Member

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    I just spoke with a friend of mine who is a rebuilder and he says the SKTFSC does have the valve that cures the converter drain back problem. I would have thought that the TCI kit would have had the valve in their kit as converter drain back with the TF is nothing new. In all my years in the transmission industry, I've never seen a sleeve like this used for the transmission pump. I have heard that they have been used on the converter hub, to "sort of repair" a worn hub on the converter yes, but at best it is only a temporary repair. Great if you're just fixing it up to sell, but not for the long run.
    If the hub of the converter isn't as smooth as a crank journal, it will eventually take out the pump bushing and the front pump seal and an oil leak will happen for sure, but won't be draining back into the transmission. A worn hub calls for it to be replaced, unless it's just a stock converter, and if so just replace the converter as it will cost almost as much to just have the hub cut away and a new one welded into place.
     
    Last edited: Mar 8, 2018
  8. Coyote

    Coyote Well-Known Member

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    Nothing like a “pro” in any line of work!

    Sounds like good advice to me.:thumbsup::beep:
     
  9. transman

    transman Member

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    I'm no expert by any means but thanks for the kudos. I spent almost 30 years in the transmission parts supply business, selling converters (we built in house), parts and transmission tools. I called on probably 300-400 transmission shops in my territory and had the good fortune to meet a lot of knowledgeable transmission builders. Thanks to what these builders told me over the years, I kept one very important bit of advise from them:
    " DO IT RIGHT - ONCE"
     
  10. vso737

    vso737 Well-Known Member

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    I want to thank all of you for your input.

    Found out the repair SPEDI-SLEEVE goes on the "torque converter" hub and NOT the pump. There may be a special bushing out there that takes care of 'drain back' but I'm NOT sure.

    I did NOT have this 'drain back' with the first torque converter "TCI" sold me with the Street Fighter 727. The original one they sold me leaked at the weld after very few miles on it. Now, this one causes DRAIN BACK into the transmission. I'm banking it is the VALVE BODY causing the drain back.

    At the recommendation of AN EXPERT on this site, I left the car in FIRST gear for a few days and the fluid DID NOT 'blow out' as usual. Problem is that it worked only once. I now have it in FIRST gear again and will start it up tomorrow and see if it leaks during initial start. It usually blows out approx. 2 oz. of fluid upon a cold start. Once the T/C fills up and the engine warms up, no issues for the rest of the day.

    After the car is parked for over a day, the transmission overfills from the fluid draining back from the torque converter causing the fluid to escape out of the vent hole during initial cold start. No problems once the transmission fills the torque converter again. ONLY occurs after the car is parked for long periods of time.

    The cause could be a worn torque converter hub or the pump bushing. This repair requires the removal of the transmission.

    Another cause could be the valve body not functioning properly.

    I dread having to take out the transmission again, so, I will work on the VALVE BODY first. I have a feeling that the problem lies in the valve body.

    I ordered the SAME shift kit that "TCI" installed in the transmission to make it a MANUAL/AUTOMATIC. I also ordered a PRESSURE REGULATOR VALVE from a different vendor. This new valve is an UPGRADE which makes the transmission react faster to the fluid pressure. My goal is to inspect the valve body and install the new shift kit and hopefully take care of the problem.

    I have NEVER worked on a transmission before and I'm really looking forward to the challenge.

    ONLY TIME WILL TELL...............


    beep.gif



    LG,
    Mike[/QUOTE]
     
  11. Coyote

    Coyote Well-Known Member

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    Good luck! Hope you’ve got a trans jack! If it needs to come out, no fun at all. Pulling sticks are bad enough, autos are a big pain in the you know what! Good luck again!:hitit::beep:
     
  12. vso737

    vso737 Well-Known Member

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    This is the work I did LAST April ( YOUTUBE above). This time I kept the transmission jack and the wooden stands for the front of the car. HOPEFULLY I will NOT have to use them.

    What I meant is that I have NEVER taken a transmission apart and worked on one before. I have taken them out of a car for a professional BENCH REBUILD on my HOT-ROD and the '69 RR.

    I have a feeling that the VALVE BODY is where the drain back issue is. I'm still waiting for the "TCI" kit to arrive.

    I will post my results when I'm finished.

    Thanks again,
    LG,
    Mike
    beep.gif
     
  13. 69hemibeep

    69hemibeep Sponge Bob Square Wheels

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    When it comes to automatics, I gotta guy :thumbsup:
     
  14. transman

    transman Member

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    [/QUOTE]
    That speedy sleeve must be really, really thin. The amount of clearance between the pump bushing and the converter hub isn't very much at all. I've never measured the inside of a bushing to know the exact dimensions, but by putting one over the converter's hub, there is no side to side movement you can feel. Like a rod bearing to the crank journal, it rides on a skim of oil. I can't see a sleeve or shim of any kind fitting between the bushing and the converter hub.
     

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