When parking my truck and selecting P for park on the gear stick and switching on the engine, when I come back and start the truck and select D ( drive ) the automatic gear box some times with go all through the gear selection but now on more occasions it will select a gear on it’s own eg 1st 2nd or 3rd and stay in the gear continuously, if I come to a halt and put it into reverse I get a really bit thump exactly the same when I take it out of reverse into neutral or park.
On the other hand, if I park the truck and leave it drive and switch of the ignition and select P for park n the gear sti…
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