Thread: High KMS - Transfer case...

Originally Posted by josh.huber

I re measured the oring and housing. Mine is definitely 2x40

40mm ID as per the standard for measuring o-rings?

Yeah the oring was fitted to my replacement. Which is old. Maybe the groove for it isn't in the D4 as Justin is saying.
I've ordered a new one and seems to look good for the replacement.

Originally Posted by Graeme

40mm ID as per the standard for measuring o-rings?

Yes 2mm cross section 40mm inside diameter. I'll confirm this time next week after the change out

Originally Posted by DiscoJeffster

So no o-ring originally???

I'll let you know what my D4 has next Friday

Originally Posted by INter674

Mm in tractors too from the engine to the clutch assembly...eg our MF input shaft spline failed due to fretting..no lube applied in factory. Fortunately the shaft spline failed...easy replacement from UK. And not the socket which requires a new fluid clutch assembly costing @5k🤤

MF later changed the design due to failures.

Why do they do it😞

I've always used a moly grease on clutch shaft splines, and that's what's usually specced in any service manual I've seen, but factories obviously continue to miss the basics......

just as some info with regards to if putting grease on a spline helps...
*All splines suffer fretting.
*Fretting is the exchange of metal on close fitting surfaces such as splines.
*When the fretted material comes into contact with oxygen it forms oxides (fretting corrosion).
*The oxides are harder than the parent metal.
*The whole purpose of grease is to prevent the fretted material from coming into contact with oxygen.

So all you need is a grease that is going to stay in place, it doesnt need to be some "special" product from the manufacturer.

Originally Posted by DazzaTD5

just as some info with regards to if putting grease on a spline helps...
*All splines suffer fretting.
*Fretting is the exchange of metal on close fitting surfaces such as splines.
*When the fretted material comes into contact with oxygen it forms oxides (fretting corrosion).
*The oxides are harder than the parent metal.
*The whole purpose of grease is to prevent the fretted material from coming into contact with oxygen.

So all you need is a grease that is going to stay in place, it doesnt need to be some "special" product from the manufacturer.

So not "Landrover special grease " at $100 per gram then.

The grease in the LR kit is the 10ml syringe size of a range of container sizes that is generally available in Europe.

I will be using Molybond assembly paste GA50 which by its application description is for the same application as the grease that LR include, but getting the 100ml tube available here for about $40. I will use more than 10ml and have spare for my son's D4 TC splines. I accept the several grease manufacturers' application descriptions that assembly grease makes it a significantly better proposition for this use.