John Gaines Posted April 20, 2012 Share Posted April 20, 2012 As in the title, my diff seems to be leaking at the diff nose, strangely where the prop shaft bolts to the diff. It has lost about 1/3 of a cup full over the winter. The diff was over filled before and the level is still above the top up hole. It does not seem to be at the oil seal Any pointers? Many thanks John. Link to comment Share on other sites More sharing options...
Bricol Posted April 20, 2012 Share Posted April 20, 2012 Can't remember, but does the oil seal run on the outer of the drive flange? In which case oil could be seeping down the splines on the pinon, then between the prop and drive flange. Bri (sorry - can't type or spell, one of them - splines not slines . . ) Edited by - Bricol on 20 Apr 2012 16:49:06 Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted April 20, 2012 Area Representative Share Posted April 20, 2012 Quoting Bricol: Can't remember, but does the oil seal run on the outer of the drive flange? In which case oil could be seeping down the slines on the pinon, then between the prop and drive flange. Bri[/pQuote At first I didn't understand, but now I do. If oil is leaking down the splines you should be able to tell when you disconnect the prop from the diff as there is likely to be a build up of oil in the flange of the universal joint. Link to comment Share on other sites More sharing options...
Bricol Posted April 20, 2012 Share Posted April 20, 2012 Yes - oil seal running on the diff drive flange means the flange is part of the seal. If splines aren't good and tight, or retaining washer isn't totally flat etc, oil will leak out along the splines. Similar thing happens with the front CV joint of the rear prop on integrales - where it washes the grease out of the joint, leading to the initial "ting" when you reverse. Bri Link to comment Share on other sites More sharing options...
John Gaines Posted April 21, 2012 Author Share Posted April 21, 2012 Would it be likely to leak much more when running on the road? Possibly looking to take it out next week and replace the oil seal before puting it back on the road but could do without the hassle Link to comment Share on other sites More sharing options...
Klunk Posted April 21, 2012 Share Posted April 21, 2012 Hi John , I may be wrong on this but with an English axle, if you undo the pinion nut to replace the seal, you will need the pinion preload to be correctly set again using the proper tool. If you don't use it you risk altering the position of the pinion and thereby altering the way the crownwheel and pinion mesh, with potentially expensive consequences. I would check with R&R or SPC (other transmission experts are available! 😬) before proceeding if doing it yourself. A small oil leak might be preferable! Regards, Giles Link to comment Share on other sites More sharing options...
Bricol Posted April 21, 2012 Share Posted April 21, 2012 I changed the seal on the English axle in Westie 15yrs ago - which is why memory is hay. I marked the position of the nut relative to the drive flange, marking the flange to the diff nose. I undid the nut, counting the turns, removed the flange, replaced the seal, replaced the flange, and replaced the nut, counting the turns again and aligned the marks. Seemed to work. Bri Link to comment Share on other sites More sharing options...
Klunk Posted April 21, 2012 Share Posted April 21, 2012 😶🌫️ Link to comment Share on other sites More sharing options...
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