Pagoda SL Group

W113 Pagoda SL Group => General Discussion => Topic started by: Anosh on June 08, 2022, 10:43:19

Title: 230SL Differential noise
Post by: Anosh on June 08, 2022, 10:43:19

Hi.
I have a 230SL.
There was a whining sound coming from the differential at speeds above 40 kmph. Nothing below that. We opened the differential and replaced all the bearings including wheel bearings. Now the whining stopped but a new sound started ... that of gears ... This sound starts at lower speeds of 10 kmph and continues as we drive the car. We once again opened the differential and replaced the crush sleeve on the pinion and the nut. Tightened the nut fully and took a trial. The noise is reduced but not yet gone. Tried to tighten the nut further but was not possible. How to proceed now is the question?

Title: Re: 230SL Differential noise
Post by: DaveB on June 08, 2022, 12:48:03

Are you confident the differential carrier rubber mounting (in the trunk) is ok? I think gear noise can be transmitted to the body if that rubber breaks.

Title: Re: 230SL Differential noise
Post by: ja17 on June 08, 2022, 13:13:05

If you over-tighten the pinion nut it will cause the unit too make noise. Be sure to use the factory tightening procedure.

Title: Re: 230SL Differential noise
Post by: Anosh on June 08, 2022, 15:13:35

Many thanks for your inputs. The mounting is ok. Will inform my engineer re tightening & revert back.