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Thread: ZF4HP22 CONVERSION TO TURBO 700 TD5

  1. 11th December 2013, 06:05 PM #1
    ROOSTERS D2's Avatar
    ROOSTERS D2
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    Angry ZF4HP22 CONVERSION TO TURBO 700 TD5

    Hi there have just had my 3rd ZFHP22 FAIL. Has anyone tryed to fit a TURBO 700 to a td5 before or if this can be done as i have a TURBO 700 with LT230 bolted up to a 307 CHEV in my old two door rangie.
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  2. 11th December 2013, 06:32 PM #2
    Dougal
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    How/why are they failing?
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  3. 11th December 2013, 06:59 PM #3
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    ROOSTERS D2
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    Quote Originally Posted by Dougal View Post
    How/why are they failing?
    Only ever had them fail giving them a hard time a lot of MUD, ROCKS AND SAND WORK. Chipped TD5 TWIN LOCKERS AND BIG RIGHT BOOT. I have worked out they don't like being rocked R AN D OR R AN 1ST OR GETTING HOT. All have lost drive foward.
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  4. 12th December 2013, 11:38 AM #4
    Mundy
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    Can you tell me what a ZFHP22 and a Turbo 700 are, please?
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  5. 12th December 2013, 11:53 AM #5
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    Quote Originally Posted by Mundy View Post
    Can you tell me what a ZFHP22 and a Turbo 700 are, please?
    They're 4 speed automatic gearboxes. The ZF4HP22 was used in many Landrovers and manufactured by ZF in Germany, the Turbo700 is a pretty common unit used in a lot of Commodores and is a pretty standard GM auto gearbox.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
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  6. 15th December 2013, 09:03 AM #6
    lyonsy
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    just remember that even a tricked up th700 is only strong in 1st and 2nd where oil pressure is used to engage and disengage the clutch packs and 3rd and 4th use spring pressure to hold the clutch packs.
    I haven't looked into how the zf box works
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  7. 15th December 2013, 09:50 AM #7
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    clubagreenie
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    How about just getting an upgraded Ashcroft 4hp24 unit?
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  8. 15th December 2013, 12:28 PM #8
    schuy1 Guest
    IF I read the specs right and going on reports around, the T700 is no stronger overall than the ZF. Want a strong box? TorqueFlite it!
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  9. 6th January 2021, 03:50 PM #9
    raymond.baker10 Guest
    I have looked at this but the turbo 700 is a big box and will not fit in the tunnel fair enough the turbo 700 can be built twice as strong as the ZF , but the tunnel is not the only problem the front tail shaft will not clear the pan as it is to wide.
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  10. 6th January 2021, 09:13 PM #10
    PhilipA
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    The trouble may be the "EH" bit at the end of the ZF4HP22EH.
    This is an electronically controlled transmission so has no kickdown cable.
    The early 700s are a manually controlled by a kickdown cable.
    There is nowhere on a TD5 to fit a kickdown cable as the accelerator is electronic.
    If the 700 were electronic you could fit a stand alone controller.

    The Torqueflite RRCs had a solid bar front driveshaft which would be like unicorns teeth, but a driveshaft place could maybe make one with a solid bar for clearance.
    Forget Torqueflite as they take about 50BHP to run and a TD5 doesn't have much more than that for takeoff. slowest RRC I have ever driven.
    Regards PhilipA
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