Metal on metal grinding noise from gearbox ?

[Jonny Moore]

I've recently had problems with my gearbox always wanting to be in the wrong gear, and suffered fuel economy loss as a result. I've had the gearbox reset (Star)and software updated which made no difference.

After reading quite a few websites I think the torque converter is locking up, but yesterday it started to make a metal on metal noise, sounds awful and is audible at all speeds and is still there when coasting in neutral....any ideas folks?

 

[st4]

You really need to get that looked at. I'd wager there is not enough ATF in there, but I suspect you could be looking at a whole new box. Sorry,

 

[television]

There are plenty of other things it could be, it may not be the gearbox,,,its all encased.

 

[alexanderfoti]

Yeah im thinking maybe a wheel bearing has gone just to be a pain

 

[Steve@Avantgarde]

Sounds like the drum has split in the gearbox. I would be dropping the sump off ASAP for a closer look but it doesnt sound good.

 

[Jonny Moore]

This morning I had to take a customer to the airport, 50 miles. The noise is worse at slower speeds and I'm losing at least 10 mpg. Feels like I have the handbrake on.

It's definitely something to do with the box as when I put it into neutral the noise changes note slightly.

Also when I knock it out of gear from say 50mph the rpm drops from around 1700rpm to Idle (obviously)..but when I put it back into gear at the same speed the rpm will only reach 1100rpm....then with very gentle throttle the rpm will flick straight back up instantly. Is that normal?

 

[mattkh]

..then with very gentle throttle the rpm will flick straight back up instantly. Is that normal?

Hi
Is it a 722.6 gearbox ?

 

[Jonny Moore]

Hi
Is it a 722.6 gearbox ?

No idea matt:Oops:

 

[st4]

It will be on a 2008 E220cdi

 

[Jonny Moore]

Center prop shaft bearing being replaced tomorrow....fingers crossed it's that !

 

[Jonny Moore]

Center prop bearing it was. Thankfully !...Thanks Ian (Star-Caversham)

 

[television]

I did not think it could be from within the box,,, not too bad a job doing the center bearing