Transmission Noise

Lee.h · June 23, 2008

Hello all,

Over the last few months I have had a noise that is starting to worry me. It’s not the usual break click or suspension bush rattle. Basically as I de-accelerate at slow speeds I can here a rumble-ish sound from the underside of the car. The sound is not affected by my breaks and it makes the sound if it is in gear and if it’s out of gear. When I accelerate the noise stops. It’s not a loud noise, but it is their. Could it be the differential? (The car is a sport model).

Just wanted to find out if it was a common problem or whether I am likely to be causing more damage by driving it.

Thank you all for your time.

Lee

dazz32 · June 23, 2008

A rumlbe "ish" noise could be a wheel bearing..

Lee.h · June 23, 2008

A rumlbe "ish" noise could be a wheel bearing..

Thanks mate for your reply, I dont think so though, it sounds a lot more transmission like. Ive just got it into my head that its the diff. But still not sure what it sounds like when they wear out.

The wife says it sounds like a wom wom wom noise. any thoughts??

Lee

kam05 · June 23, 2008

Could be tyre roar?

What tyres are on the car? If they are cheap chinese made tyres (or really worn down) then in my experience they can make a lot of noise (as well as affecting the handling of the car).

dazz32 · June 23, 2008

see if you can find someone who can jack ya car up with all for wheels of the ground and try and replecate the noise whilst she is up.might be a better option.

Lee.h · June 23, 2008

Could be tyre roar?
What tyres are on the car? If they are cheap chinese made tyres (or really worn down) then in my experience they can make a lot of noise (as well as affecting the handling of the car).

Its got the michelin pilot exalto tyres with about 1000 miles of wear, so I cant see that being the problem.

I might put the car on the ramps tomorrow though and give the wheels a spin, might be something.

Thanks for the ideas!

Lee

SD700MN · June 23, 2008

HI. if you feel the noise may be tranny related, check your transmission oil level and the colour of the oil. black oil is not a good sign. this is ofcourse if your car is auto. my car made a loud almost zinging sound before my transmission packed in and the sound was worse when the car was cold. it also subsided somewhat on higher revs and when the car warmed up.

i hope this is not the problem you're having.

Jack300 · June 25, 2008

Prop shaft centre bearing?

There's normally a rubber mount that supports the bearing - I've no experience of them on a Lex but on my previous cars it was a common problem... The rubber mount dries and eventually cracks. If you manage to get underneath the car, it's easy to check.

I'd also be looking at all of the plastic that's under there - it's not fastened on with anything strong so if it's hanging down or just vibrating on the bodywork - that may be the problem.

Good luck

jack