A crunching sound when moving the lever into Park is usually a sign of something disconnected downstream of the transmission output. It’s caused by the parking pawl ratcheting on the park lock gear, even though the park lock gear should be...
…and does the gear position displayed on the instrument panel correspond exactly with the position of the gear lever i.e. D in D, N in N, R in R & P in P?
Phil
I admire your optimism.
So, to recap, the car made the ‘big bang’ when accelerating in a forward gear. It will still engage and drive forwards but, since it made the noise, it will no longer engage or drive in reverse. Is that correct?
Phil
There’s no longer such a thing as a Sonnax valve body assembly. I would suggest that you send your worn unit to someone like Valve Bodies UK http://www.valvebodyuk.co.uk/ or STA Aylesbury https://www.staautogearbox.co.uk/ who own a Hydra-Test...