Rock truck not shifting out of 1st anyone have a Service manual serial number is A35DV61235
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Have you any warning lights lit up on the dash? any other symptoms?
no warning lights on dash, what I'm told is if she gets going down a slop she will shift into 3rd if speed is there but no second . i bought a service manual but only had time to browse through it and the is no troubleshooting section . just wanted to arm myself with some troubleshooting tactics and gear before i go to machine
Sounds like 2nd gear apply brake or planetary has failed. Fluid pressure test will reveal. You will need gauges and test fittings. In the service manual under powertrain will be testing procedure. If it's the planet set, it is serviceable in chassis without removing the case.
If you can't find the testing and pressures
That's great guys I'll get to my laptop and have a look . Really appreciate it