Auto Speedo sensor gear to manual

Discussion in 'Technical' started by bret, May 5, 2018.

  1. bret

    bret Member

    Hi the new z I brought was a manual so it has a manual diff in it still I want to keep it in but I want to put a auto box in as my parts car has a auto in it so my question is will the speedo sensor gear off a manual tt fit on to a auto speedo sensor so I get the right speed at the speedo on the dash ? Has anyone done this I have done it before but was with a bluebird trx s2 lol if not dose anyone one know wot I have to do to get it to read the right speed with the manual diff hooked up to the auto thank u
     
  2. Fists

    Fists Well-Known Member

    Manual and auto speed sensors aren't interchangeable but the diff will be the same if both cars are TT, and you probably don't want the softer NA auto box behind a TT.
     
  3. bret

    bret Member

    Hi mate they are both tt the manual diff are a different ratios than to a auto iv always been lead to believe ?
    I new the hole sensor it’s self is different I want to know if the plastic gear on the end is interchangeable?
     
  4. Fists

    Fists Well-Known Member

    In many cars they use a different diff based on gearbox but the Z32 only has two diffs, NA 4.11 and TT 3.69. You'll be fine with the sensor/gear fitted to the auto.
     
  5. bret

    bret Member

    Ok thank u
     
  6. East Coast Z

    East Coast Z Well-Known Member

    Re: Speed sensors.
    There are 2 speed sensors fitted to TT transmissions, auto part #25911-40P11 & manual part #25911-40P10.
    The auto gear part #32743-35F18 & the manual part #32743-30P18.
    As mentioned the diffs are the same between auto's & manuals, which can be verified on the VIN plates.
     
  7. bret

    bret Member

    Ok thank u was worried about it being out so I’m all good
     
  8. ZXOCET

    ZXOCET Member

    I did the reverse (auto to manual swap). MRC at Castle Hill put in a calibration speed changer unit as I have a different final drive ratio (Leader Gears) and larger size wheels and low profile tires - did not need a speedo gear change. MRC did a dyno adjustment for the 300 kph speedo I have - within 1% so no issues. Might be worth contacting MRC if interested (Contact is Mark (02) 9634 5399 or mrcdyno@iinet.net.au)
     

Share This Page