From TH

MTX75 kogboxes(from around 2004 on ) have a change to the diff, still use the same 'moulded'/sinter style gears but the diamater of the diff pinion pin has been increased from around 15 MM diameter (that size goes right back to '94) to around 18 MM diameter....that alone tells you that they know of an issue with the open diff assy. This I found on a trans I built for a Focus with a 2.3 4 cylinder Duratec (pure track trans/car).....and as I said the lube spec is now honey for the Focus. I think all the 'musical lube' issues are around the diff, which a lube will not save(stoc diff that is), any trans with a quaife or torsen will have no issue.....whatever.....

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If MTL is going to cause issues on a stock trans I'm sure as hell not putting it in my modified trans.

-'96 SE MTX 3L -'98 SVT 1,173 of 6,535 -'05 Mazda 6s, loaded, g/f's ride -Need a 96-00 manual on CD? PM or email me