Heavy Equipment Forums Heavy Equipment Community

Moxy transmission

JLAVERTY1 · 2026-08-16 16:12

Hi I have recently purchased a Mt30r moxy dumptruck, it’s 1999 Have an issue with the transmission will Work fine 1,2,3 foward and 1,2,3 reverse but won’t go abouve 3rd when the automatic function is is used. Ie placed just into drive. It’s showing fault code 21 on the gear controller dash. Has anyone any ideas? Thanks

Replies1
  1. #1John C.2026-08-16 21:04

    The best guy to call that I know of is Richie Rich in Washington State. His phone number is 206 947-0903. He also sells parts for those machines. Tell him that appraiser guy gave you the phone number.