Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: ricrose on August 22, 2014, 03:05:20

Title: Gearbox / transmission noise
Post by: ricrose on August 22, 2014, 03:05:20

I went for a 100km drive yesterday morning - a beautiful sunny winters day - but, 1k from home, on an incline, I started hearing a whining sound, a bit like a high pitched slipping fanbelt. It was certainly coming from the gearbox (1965 230sl auto) as when I pulled over and took it out of gear and the noise stopped immediately. Putting it back in gear and going slowly I recorded the sound and got home. Also the car seems to rev high (not that I took it over about 1500 revs) and not change properly.  ???
I am 300km's from where my BBB and other manuals are so I went through the forum and TM carefully but could find nothing that comes close to what I have.
If I was guessing (which is all I can do at this stage) I would say that there is a shortage of oil pumping around the galleries - but that is not based on anything other than sound and 'feel'. The oil is fine on the dipstick - clean and correct amount.
I tried to attach a sound file for anyone to 'enjoy' but the site does not allow it - I then converted it to a movie, but in the conversion all the detail was lost - so I may have to go out again (which I would rather not do) and make a video rather than a sound file.
Hoping that what I have described is familiar to someone as I really don't know where to start.ftp://

Cheers Richard

Title: Re: Gearbox / transmission noise
Post by: Peter van Es on August 22, 2014, 06:46:07

Zip up the sound file and attach the zip file...

Title: Re: Gearbox / transmission noise
Post by: ricrose on August 22, 2014, 07:36:47

Thanks Peter, just didn't think of it - was too focused on changing the file type. Sometimes you can't see the wood for the trees!
zip file attached

Richard

Title: Re: Gearbox / transmission noise
Post by: Sept on August 23, 2014, 18:54:00

For future reference a good site to use for sound is SoundCloud.com.  You can get a free account with basic storage and it will host various types of sound files. You will also get a url to the file that you can link to and share with others.

Title: Re: Gearbox / transmission noise
Post by: Peter van Es on August 24, 2014, 12:37:11

Well it doesn't sound normal but I can't tell what might be wrong. Perhaps Joe Alexander can tell...

Title: Re: Gearbox / transmission noise
Post by: garymand on August 25, 2014, 23:42:25

It sounds like a pump.  I've heard this noise or one like it.  It was my rear pump.  You take off the back tranny cover and its right there.  There is a (30 years ago  ???) Seems it was that pump and it was really easy to R&R and not too expensive. 

I'm sure some one here knows which other pump it might be. 

Title: Re: Gearbox / transmission noise
Post by: ricrose on August 25, 2014, 23:54:31

Thanks Gary - if it's only a pump I would be VERY happy.
Gearbox i$$ues are always pricey. I am sure it is oil related.
I'll let you know what I find.
Richard