I’ve got the opportunity of buying a Spitfire mk4 diff 3.63 for my Vitesse mk2 OD with 3.89 diff . The seller has stated “minimum backlash”
The 3.63 would have advantages with longer drives . I travel from Suffolk to the Wirral 230miles regularly and would like to use the Vitesse more on these runs .
I know the diff would require 2 extra studs and I would also add a drain plug . At a minimum the bearings on the inner axle shafts and the front flange oil seal and bearings would be changed and although I have not done this before reasonably comfortable about doing this . My question is how do I check if the diff is worth refurbing ? Does the diff need checking over by an expert or could I do the necessary tolerance checking . If work was required on the internals I know this would be beyond my capabilities and then part ex with Fitchetts or hand over to Mike Papworth . Fitchetts current price for a recon is £540 which seems reasonable but what do you get with a refurb , accepting you won’t get anew crown wheel and pinion.
Any advice welcomed
Paul