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If there is no trouble while shifting, then the problem most likely is with the ignition sequence. This could be caused by bad gasoline, a bad timing assembly or faulty spark plugs/wires.
Trouble code P0480 means: Low Speed (No. 1) Fan Relay Control Circuit
Are you having trouble shifting out of park? Would it be a bad solenoid/tranny?
could be a problem with your transmision, having trouble shifting
Possible speed sensor issue. Have it checked for trouble codes to know what to diagnose.
it probably needs a tune up an a intake system flush.. an as far as hard shifting if its a automatic you more than likely need to change the filter an fluid in the trans
There must be a "check engine" light on. Start with investigating the DTC's (Diagnostic Trouble Codes).
four wheel drive drive line came disconnected
yes check you vacum line in the back of your transmison
best case senario, low trans fluid. worse case senario bad transmission.
I'm not sure, but it may be time to have the transmission serviced.
The first two steps are check the fluid and check the computer for trouble codes.