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Thread: 4HP22 'A' pack information

  1. #1
    Join Date
    Jun 2010
    Location
    TX
    Posts
    4,487
    My Cars
    1983/84/85 745i

    Thumbs up FYI/DIY - 4HP22 'A' pack information

    Not sure if I posted this before, but here are the repair procedures to repair and/or prevent your 4HP22 from losing the 'A' clutch pack. Pretty sure this is taken from the ATSG book.

    Use this kit: http://www.superior-transmission.com...age.cfm?ID=104 K4HP22. Bulkpart.com, transmissionpartsusa.com, etc all should carry it. They also carry a valve body spring for the EH and non EH also if you feel like doing it while in there. Just adds some line pressure to crisp up the shifts slightly, worth the hassle to me while you are in there.

    Obviously the transmission needs to be out to perform this... so you can just go with OE replacement clutches or the Alto 'A' pack if you have a more performance orientated 4HP car. Part number for the Alto setup is 053755. The material is better and the pack stack holds another clutch.

    Replace the external trans seals while you have access and change the rear main on the motor. Drop a strong magnet in the pan and install an inline filter.

    I may be onto something with a deeper pan that is a direct swap, I will keep everyone posted with my findings. It will probably add a quart or two at the most, but hey... more is better.











    Last edited by Hit Man X; 11-19-2014 at 09:20 PM.
    I make E23 parts.
    09/1983 745i (stolen spring '13 around Houston, TX Achatgruen on nutria buffalo. 8481080)
    10/1984 745i
    11/1984 745i
    11/1984 735i (10:1-265/6)
    Ford, MB, and GM round out the pack.



  2. #2
    Join Date
    Jun 2011
    Location
    P.O.
    Posts
    142
    My Cars
    85 735i
    i think the gods made the hp4 one of the toughest tranys out there they even put them in land rovers

  3. #3
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,655
    My Cars
    11/88 E32 750iL+98 E36M3
    some more info
    http://www.nmia.com/~dgnrg/page_43.htm
    https://web.archive.org/web/20160130...2_rebuild.html
    Superior BMW ZF 4HP22 Automatic Transmission Clutch Shift Correction Kit Replacement Seals. Replacement Teflon seals used with the (#K4HP22) clutch correction package. (3) Replacement seals for K4HP22.
    4HP22 Automatic Transmission Master Rebuild Kit BMW Volvo ZF4HP22 ZF-4HP22
    https://www.oregonperformancetransmi..._Code=SUP-K002
    Shogun tricks and tips for the E32 series are HERE!

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