Vitesse Owner Posted June 6, 2016 Report Share Posted June 6, 2016 I have Vitesse 2 litre MK 2 with a noisy diff., there is some noise whilst driving but trouble is most apparent when moving away slowly or reversing. I happen to have a diff which came out of a 2 litre Mk 1, does anyone know whether this would be a direct replacement ? I know that the ratio is the same, but I read somewhere that the Mk 2 has a stronger spring and I wonder whether there is a difference in the studs securing spring to diff. I have changed diffs on a non rotoflex car before which was quite easy, I wonder just how difficult the Mk 2 will be. I know that a special tool is required to deal with the spring. Any advice please? Jeff. Link to comment Share on other sites More sharing options...
Gary Flinn Posted June 6, 2016 Report Share Posted June 6, 2016 I have Vitesse 2 litre MK 2 with a noisy diff., there is some noise whilst driving but trouble is most apparent when moving away slowly or reversing. I happen to have a diff which came out of a 2 litre Mk 1, does anyone know whether this would be a direct replacement ? I know that the ratio is the same, but I read somewhere that the Mk 2 has a stronger spring and I wonder whether there is a difference in the studs securing spring to diff. I have changed diffs on a non rotoflex car before which was quite easy, I wonder just how difficult the Mk 2 will be. I know that a special tool is required to deal with the spring. Any advice please? Jeff. Jeff The Mk1 Diff will be a straight Swop, the Mk2 Vitesse does have a different profile spring but still bolts to the diff with the same 6 Studs as all Heralds & Vitesse's? A spring lifting tool will be needed on the Mk2 with the Rotoflex suspension, have a read of a Workshop manual regarding the Diff swop. Regards Gary Link to comment Share on other sites More sharing options...
Vitesse Owner Posted June 6, 2016 Author Report Share Posted June 6, 2016 Gary Thank you, and I will get a manual before starting the job Regards Jeff Link to comment Share on other sites More sharing options...
JohnD Posted June 6, 2016 Report Share Posted June 6, 2016 Before you do this heavy job, read the page on Diff noises at Canley Classics: http://www.canleyclassics.com/technical-archive/rear-end-noises/ It may change your mind about what is the problem. John Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 10, 2016 Report Share Posted June 10, 2016 agree with john , this doesnt sound like the diff is the culprit what sort of noise are you getting ??? Pete Link to comment Share on other sites More sharing options...
Vitesse Owner Posted June 14, 2016 Author Report Share Posted June 14, 2016 Before you do this heavy job, read the page on Diff noises at Canley Classics: http://www.canleyclassics.com/technical-archive/rear-end-noises/ It may change your mind about what is the problem. John Thank you, I've now done that and it is very interesting. Jeff Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 14, 2016 Report Share Posted June 14, 2016 maybe its time to check out the inboard UJ, hub nuts and wheel nuts first Pete Link to comment Share on other sites More sharing options...
Vitesse Owner Posted July 2, 2016 Author Report Share Posted July 2, 2016 Pete I've now had a more intensive look. With the wheels on the ground there is about 5-10 degrees of play in the propshaft. There is a notchy sound and feel whilst moving the shaft by hand. The u/js appear ok, no movement or any tell tale signs under the circlips. I have never dealt with Rotoflex joints before however they look alright, there are a (very) few hairline cracks in the rubber that is all. As I said before the trouble is most apparent when manouvering slowly when there is severe juddering at the back and again at about 45 mph when there is rumble which is felt as much as heard. I think suspicion points to the pinion and pinion bearings. My spare diff. has a little less free play and certainly no roughness can be felt (it is not fitted to a car and I have never used it.) If it were not in good order I wonder how apparent that would be when it is sitting on the bench. Any comments. Jeff Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 2, 2016 Report Share Posted July 2, 2016 There is alway a good what seems backlash on a pinion coupling as you are feeling the play kn the differential sun and planets , not easy to detect the few thou backlash of the crownwheel and pinion it should have some light resistance when turning the pinion as it should have some pre load, it should not be notchy, just smoothish. light ozone cracks in the rota flex is pretty normal, splits or delaminating or signs of parting adhesion is on its way out, they can last looking rough for many. Many miles or years odd flaps/films of rubber from its moulding process is normal, they are not easy to change club shop sell good ones pete Link to comment Share on other sites More sharing options...
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