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Thread: 4HP22 Transmission - Parts Interchange

  1. 2nd August 2013, 12:54 PM #1
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    4HP22 Transmission - Parts Interchange

    Discovery 2 Auto Transmission ZF part numbers are normally as follows: V8= 1043010765 and TD5 = 1043010766.
    Noting that (in addition to the Transmission ECU) the following are noticeably different between the two models - Bell Housing, Torque Converter and rear extension housing/mount.
    What components are interchangeable between a V8 and TD5 transmission?
    i.e. could the internal components such as the valve body and clutch packs from a good V8 transmission be used in rebuilding a TD5 transmission.
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  2. 2nd August 2013, 04:20 PM #2
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    Extension housing will be the same as they both use the LT230, valve body will differ from V8 to TD5 as that is what changes the shift characteristics.
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  3. 2nd August 2013, 07:53 PM #3
    Disckombi Guest
    I'd imagine the differences would be much the same as between tdi300 & V8 boxes.

    • Rear extension housing likely to be longer on td5 plus (where I got caught) the gearbox output shaft is also longer on diesel
    • Governor will be different (this runs on the output shaft inside the extension housing)
    • Kickdown/throttle cam will be different
    • Some of the valving may be different, but if its an electrohydraulic box its possible the electrics handle that bit
    • The basic internals though will be the same (except the output shaft)

    Hope that helps
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  4. 2nd March 2018, 06:48 PM #4
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    Discovery Range Rover autobox ZF 4HP22

    Fellas there are a few posts around describing the similarities and differences between disco 2 v8 and td5 auto boxes.
    Can anyone tell me if the ZF 4HP22 fitted to a 1997 P38 Range Rover 4.6 V8 is interchangeable with my 2000 disco 2 4.0 V8?
    You may have seen from a previous post of mine that my front prop punched a hole in my autobox. I intended to get another casing and swap the internals over. Ive managed to find a guaranteed box off a rangie that im happy to put in as a direct replacement provided it will work with the discos electronics.
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  5. 2nd March 2018, 07:07 PM #5
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    were'nt the 4.6 ZF's a 24?
    "How long since you've visited The Good Oil?"

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  6. 2nd March 2018, 09:44 PM #6
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    Yep
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    '94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
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  7. 2nd March 2018, 09:50 PM #7
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    ZF 4HP22

    Looks like you're right fellas. The seller must have misidentified the box he's selling.
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  8. 2nd March 2018, 10:48 PM #8
    discorevy
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    If its a 4hp24 it'll be 15mm or so longer .
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  9. 3rd March 2018, 07:10 AM #9
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    "Fatter" pump on the -24s
    DiscoClax
    '94 D1 3dr Aegean Blue - 300ci stroker RV8, 4HP24 & Compushift, usual bar-work, various APT gear, 235/85 M/Ts, 3deg arms, Detroit lockers, $$$$, etc.
    '08 RRS TDV8 Rimini Red - 285/60R18 Falken AT3Ws, Rock slider-steps, APT full under-protection, Mitch Hitch, Tradesman rack, Traxide DBS, Gap IID
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  10. 4th March 2018, 11:11 PM #10
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    ZF 4HP22

    Thanks for the top tips fellas. You saved me wasting my time. I found a 2002 Disco 2 V8 auto box today. I'll do the swap next week.IMG-20180304-WA0000.jpg
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