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Problem after changing I-Shift Gearbox

Discussion in 'Volvo Forum' started by Amushonga2000, Mar 12, 2014.

  1. Mar 12, 2014 #1
    Amushonga2000

    Amushonga2000 Bobtail Member

    16
    0
    Jan 26, 2014
    Johannesburg, South Africa
    0
    I have changed the I-Shift AT2512c gearbox on my FH13-520 with an ATO2512c from a Renault Premium. The main problem is that the speedo shows the speed to be for example 90km/h when the actual speed is actually 75-80km/h. As a result, I am not able to get into gear number 12 (traveling gear) as top speed is set at 90km/h. How do I correct the speedo?
     
    Amushonga2000, Mar 12, 2014
    Amushonga2000, Mar 12, 2014
    #1
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  3. Mar 12, 2014 #2
    jameslawton

    jameslawton Light Load Member

    257
    65
    May 1, 2013
    Tulsa OK
    0
    Have to plug truck in and change the tooth count at transmission or if they fit just change the Speedo teeth from old trans to new or you have to change ecm number and change the Speedo to match new tooth count
     
    jameslawton, Mar 12, 2014
    jameslawton, Mar 12, 2014
    #2
    Amushonga2000 Thanks this.
  4. Mar 13, 2014 #3
    Amushonga2000

    Amushonga2000 Bobtail Member

    16
    0
    Jan 26, 2014
    Johannesburg, South Africa
    0
    Thanks James! I will try that
     
    Amushonga2000, Mar 13, 2014
    Amushonga2000, Mar 13, 2014
    #3
  5. Mar 13, 2014 #4
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,642
    Oct 11, 2010
    Borispol, Ukraine
    0
    first of all start with TACHO calibration. AT and ATO have different output shaft tone rings
     
    Pablo-UA, Mar 13, 2014
    Pablo-UA, Mar 13, 2014
    #4
    Amushonga2000 Thanks this.
  7. Mar 14, 2014 #5
    Amushonga2000

    Amushonga2000 Bobtail Member

    16
    0
    Jan 26, 2014
    Johannesburg, South Africa
    0
    Speed sensor needed to be synchronized with the tacho, the FH520 is now driving like a dream. Thank u!
     
    Amushonga2000, Mar 14, 2014
    Amushonga2000, Mar 14, 2014
    #5
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