Right, decided to go all out seeing as I have removed the diff.
Stripped it all down tonight apart from the races in the case and bearings on the lsd and pinion as was a bit late and didn't want to annoy the neighbours
Nothing major or obvious to report.....unfortunately! I was hoping to come across something but it didnt happen.
Only thing I found was Input bearing opposite side to crownwheel feels a little rough but nothing major, although under tension its worse. I think the collar moved and it lost the spot weld. That got chewed up and got into the bearing as slight bits of metal filings on the bearing case.
Also under the crown wheel where it bolts to the lsd there was a bit off metal debris, crown wheel too running tight to the pinion, worn clutch plates in the lsd? On closer inspection I think the backlash may have been too tight previously. There is a decent amount of wear on the pinion and the crown ( as pictured, red is the curve i have when should be more like the green line ) looks like the pinion has been digging in too far. Didn't bother with engineering blue as I've ordered a new crown wheel and pinion....but not the same size
Done a lot of calculations and I've decided to go brave and go with a 4.7 cwp. On multiple calculations I work out I currently have a top speed of 175-180mph which is ridiculous
. Not that it would get there but can you imagine doing that speed in a car that has no windscreen haha!
With a 4.7 I should be able to hit between 140-145mph at 8500rpm in 6th which is more than I would need on track, or the ones I will be using. Going from the 4.1 to 4.7 i should see a decent acceleration gain. While it won't be suited to all tracks it will for most.
I plan to swap out the gearbox next with the spare i have as the grind from 3rd to 4th is a bit annoying and I will be using more gears with the new cw&p. Plus the release bearing is noisy so will be nice to get that fixed.
Will update as things arrive and progress.
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