P38A Transfer Box Remove/Overhaul

tank93 said:

Hi All,

Next on my list of things to do on the P38 is to overhaul the t/box and replace the viscous and chain. Tyres are starting to scrub when turning so the viscous is on the way out so if replacing that might as well overhaul the complete box.

Can anybody suggest what other parts should be replaced, I guess there are bearings/seals that should be replaced if the t/case is removed? Any parts/part numbers required would be great and I will order them up.

Thanks

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Datatek said:

Unless you have done a very high mileage or tow or do a lot of off roading, I doubt you need to overhaul the TB. The VCU is easy to replace without doing anything other than drop the front prop.

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tank93 said:

Thanks for the all the comments.

1) I have spoke to Ashcroft transmissions yesterday as somebody mentioned them, they can do me an exchange t/box total price just over £1,200, think you get £250 of that back upon return of the old t/case.

2) Thanks Dataek for your input, if the viscous can be replaced without having to remove the complete t/box, then it makes sense to do this first and then reassess. Can the job be completed just removing the prop or does the cross member also have to be replaced?

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tank93 said:

Thanks for the all the comments.

1) I have spoke to Ashcroft transmissions yesterday as somebody mentioned them, they can do me an exchange t/box total price just over £1,200, think you get £250 of that back upon return of the old t/case.

2) Thanks Dataek for your input, if the viscous can be replaced without having to remove the complete t/box, then it makes sense to do this first and then reassess. Can the job be completed just removing the prop or does the cross member also have to be replaced?

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Ratae said:

Worth a read: http://p38.hts.com.au/pdf/viscous_coupling_replacement.pdf
To help line the housing up when refitting (Section 8 in the link) it would be worth putting couple of studs into the transfer box so you can put the VC housing onto them & slide the mating faces together. Fit a couple of bolts then remove the studs & fit the rest of the bolts.

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Grrrrrr said:

Yes, it was the press part that pushed me over the edge into a complete refurbed box.

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tank93 said:

Is there a torque figure applied to the hub nut which is used to determine if the viscous is seized? Seems subjective otherwise just to say it should turn with with some force. One persons opinion of a high amount of force could be totally different to the next person.

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