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zf transmission

  1. D

    Case 721c shifting and brake issues

    Purchased 2000 case 721c 3500 hours at auction original issue of only first gear working and going into protection mode “neutral”. Machine would move again if restarted. noticed it wasn’t reading speed on the dash so replaced speed sensor. Now it will run and drive all day but only in 1st...
  2. Yazid Asaad

    Zf transmission issue

    Hello all We have a TEREX TA30 truck with serial number of A7751209 model of 1999. We have a problem of shock shift at 2nd to 3rd gear. We try to calibrated by AEB many time with different condition, but the same problem.( AEB give OK message). We changed the TCM with another truck TCM and...
  3. P

    Terex TA30 ZF 6WG 310 Transmission leaks

    I am chasing leaks on ZF 6WG Transmission. It looks as though the Gear Shift Housing (#1573838)(mounted to the upper right side of the torque converter case) is leaking. I suspect Cover #5 maybe leaking at gasket #6 Any ideas why this assembly would start leaking? Anyone have suggestions or...
  4. X

    621b transmission issues

    ISO schematics for case 621b. Auto shift is inop. Also looking for trans pressure test port diagram and pressure specs. Third gear will not engage.
  5. V

    ZF Trans Oil in Hyundai HL740TM-3

    Hey folks- I bought a 2002 Hyundai HL740TM-3. The book calls for Dexron II, but the oil in the trans appears to be multi-weight engine oil, maybe like 5W40. One of my older mechs said that an outfit that he worked for used engine oil in their Terex trucks with the ZF trans. Any thoughts? Thanks.
    • VKC
    • Thread
    • hyundai hl740tm-3 zf transmission
    • Replies: 11
    • Forum: Lubrication
  6. N

    Issues with Terex TA35

    This could end up being a long post, so I apologize ahead of time. Its my first time here, and Im assuming the more information I give the more accurate the responses will be. I purchased a 1999 Terex TA35 articulating dump truck a few months back (serial number A7761027) from an online...
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