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Not engaging gears
https://forums.tipec.net/viewtopic.php?f=27&t=8601		 Page 1 of 1
Author:  lightning [ Tue May 25, 2010 7:51 am ]
Post subject:  Not engaging gears
What reasons could there be for a 928 S4 automatic not to go into gear? You move the shift lever but nothing happens.
I'm hoping it's just loss of fluid, although I would have thought you would get some warning of failure before it actually stopped working completely.
I have not seen the car as it's the one I sold in April, but the guy said it won't go into gear.
Author:  Brett928S2 [ Tue May 25, 2010 9:15 am ]
Post subject:  Re: Not engaging gears
lightning wrote:
What reasons could there be for a 928 S4 automatic not to go into gear? You move the shift lever but nothing happens.
I'm hoping it's just loss of fluid, although I would have thought you would get some warning of failure before it actually stopped working completely.
I have not seen the car as it's the one I sold last month, but the guy said it won't go into gear.


Hi :)

Broken T` Shifter ???

Common if hes been rough with it...

All the best Brett :)
Author:  lightning [ Tue May 25, 2010 9:24 am ]
Post subject:  Re: Not engaging gears
I thought that, but it was a brand new one.

I'm waiting for him to ring me, he's found a place called Autohaus that are going to come out and look at it, but I told him (in a reply to his email) to speak to me first, I may be able to tell him what is wrong with it.
Author:  lightning [ Tue Jun 08, 2010 7:32 am ]
Post subject:  Re: Not engaging gears
He's taken it in somewhere and they say the hydraulic oil pump has failed/broken up, and they are rebuilding the gearbox at a repair cost of £2500.....hells bells.
Is this a rare fault? I don't know if there were any warnings of failure.

I would have thought a second hand gearbox would have been a better bet. There's one on ebay at the moment for £400 BIN.
Author:  lightning [ Thu Jun 17, 2010 8:16 am ]
Post subject:  Re: Not engaging gears
Does anybody have any thoughts on this gearbox failure? Is it possible that the oil pump would break up? Would you get any warning of this failure?
Author:  tr7v8 [ Thu Jun 17, 2010 8:56 am ]
Post subject:  Re: Not engaging gears
Pic of a typical pump here : http://auto.howstuffworks.com/automatic ... sion12.htm

Loss of pressure I'd guess would be a seal blown out. As boxes age the seals harden & this causes bypass leakage which causes all manner of problems. This is why older boxes fade away rather dying suddenly. It is a Mercedes auto at the end of the day so £2.5K for a rebuilt warrantied box isn't too bad.
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