sulzerman Posted October 12, 2014 Report Share Posted October 12, 2014 Hi all My spitfire mk4 diff is very noisy despite it being a recon unit, that only covered less than 3000 miles (fitted by a previous owner, from a specialist in Lincoln in 1999.)What should I look out for when inspecting a secondhand item, or can anyone recommend a good reconditioner. thank you Link to comment Share on other sites More sharing options...
Clive Posted October 12, 2014 Report Share Posted October 12, 2014 Not easy to tell by sight/feel. You can feel the backlash in the crownwheel and pinion, it is very tiny if any, and very slight. Do not confuse with the usual backlash in the differential part that can be quite large but is worn thrusts and unlikely to be an issue. As to reconditioners, Mike Papworth has a very good reputation, though if it is CWP noise it may be permanent, only cure being new...... However, a good reconditioner can get the noise levels low unless badly worn or poor quality parts. Link to comment Share on other sites More sharing options...
Dick Twitchen Posted October 13, 2014 Report Share Posted October 13, 2014 Would fully support giving Mike Papworth a call/send him an EMail (details are in The Courier); he can certainly provide sound (!) advice and quality of work makes him good value for money. Just a pity Coventry is a bit of a drive away! Link to comment Share on other sites More sharing options...
PJM Stag Posted October 15, 2014 Report Share Posted October 15, 2014 Mike has done 2 diffs for me, well worth the drive and highly recommended Link to comment Share on other sites More sharing options...
sulzerman Posted February 3, 2015 Author Report Share Posted February 3, 2015 Update Had diff rebuilt by Mike Papworth. He found original old or wrong bearings were still fitted also c/w and pinion not set up correctly. All now good, although I haven't tried it yet as cylinder head is off at present! Link to comment Share on other sites More sharing options...
Colin Lindsay Posted March 7, 2015 Report Share Posted March 7, 2015 He rebuilt my GT6 diff two years ago and it was a lovely job. However as Clive says he can only work with the bits that he gets, so terminal wear in the CWP can be helped by proper settings to eke out a few more years on the road, but can’t be removed completely if the parts are too badly worn. With regards to the preload setting I’ve seen some supposedly reconditioned ones that were almost impossible to turn by hand. Link to comment Share on other sites More sharing options...
sulzerman Posted March 11, 2015 Author Report Share Posted March 11, 2015 Now road tested the car, the diff is virtually silent!!! GREAT!!!! Thanks Mike!! Link to comment Share on other sites More sharing options...
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