We are now able to supply a R380 to suit the MW Machines M47/M57 Adaptor.
This gearbox as standard, will be built with our Heavy Duty Rear Support bearings. One of the common failure modes of the R380 is premature wear of one or both of the rear support bearings in the rear 5th speed aluminium housing, this starts as a whirring in all gears but not so bad in 4th, then as the bearings wear it allows the 5th gear on the layshaft and 5th gear on the mainshaft to come a little out of mesh, then 5th also gets noisy and often results in the teeth coming of one or both of the 5th gears, after much design work we are now able to offer to upgrade these two bearings.
The Layshaft rear support bearing is FTC2385, this is made by RHP and has a dynamic load rating of 27Kn, we replace this with a larger bearing of equivalent quality which has a dynamic load rating of 35.5Kn, this is a 31% increase. See below a comparison photo of stock vs our HD one.
The Mainshaft rear support bearing is FTC3371, this is made by RHP and has a dynamic load rating of 27.4Kn, we replace this with a larger bearing of equivalent quality which has a dynamic load rating of 44Kn, this is a 60% increase. See below a comparison photo of stock vs our HD one.
This upgrade would be advised for any hard working R380.
We can also offer, as as optional extra, the R380 5th gear ratio upgrade. All TDi 5th gear ratios are 0.77; the V8 ratio is 0.732 which is approx 5% higher. We are able to fit these higher ratio 5th gears to both boxes for an additional charge if required. If you want to run these numbers on the ratio calculator, please select the type 69A R 380 option but this is for the 5th gear ratios only, all other gears will remain the same.