Transfer Box Intermidiate Gear

[dag019]

As I am still tracking down my transmission wine, I took the suimp off the transfer box this week. I checked the intermidiate gear and found there to be a few mm of lateral movment of the gear on the shaft. Having watched this video on how to change the bearings it indicated that there should be no end float. If this is the case this may be the cause of my problems.
Before I remove the tranfer box to get it refurbished can anyone confirm that there should be no movement at this point? The box has done 250k so it is posssibly due a refurb as I did the gearbox last summer.

 

[tottot]

Have you done the test with the feeler gauge ?

 

[jamesmartin]

As I am still tracking down my transmission wine, I took the suimp off the transfer box this week. I checked the intermidiate gear and found there to be a few mm of lateral movment of the gear on the shaft. Having watched this video on how to change the bearings it indicated that there should be no end float. If this is the case this may be the cause of my problems.
Before I remove the tranfer box to get it refurbished can anyone confirm that there should be no movement at this point? The box has done 250k so it is posssibly due a refurb as I did the gearbox last summer.

yes none at all its runs on taper bearings

 

[Brown]

Yes, you can get the intermediate shaft nice and tight as it's on tapered rollers and there's a nut on the end of the shaft on which they are mounted so that they can be pulled together and eliminate slack. It's not too hard to take a transfer box apart at home and change the bearings. I've done it. There's some pictures of this in my thread about fitting an overdrive and changing my centre diff:
https://www.landyzone.co.uk/land-rover/building-the-gearbox-of-my-dreams.293835/
OK, I re-used the old bearings but it wouldn't have been much different had I fitted new ones.

 

[Brown]

James beat me to it!

 

[raywin]

May be worth sorting sooner rather than later if it is floating about on the taper bearings then the gear mesh will be out of line and the gears may suffer.
And as above the bearings actually have a slight pre load .

 

[dag019]

Thank you all, I have not measured exactly as there is more movement than could be measured with a feeler guage. But it sounds like it definitly needs doing, hopefully that is the cause of the transmission whine as well. Although I know the transfer box is not too difficult to rebuild myself I have just started a new job so currently dont have the time. I will probably take it ashcroft and get them to do it.

you can get the intermediate shaft nice and tight as it's on tapered rollers and there's a nut on the end of the shaft on which they are mounted so that they can be pulled together and eliminate slack

Is tightnening it up worth it in the (very) short term to crudly take out some of the movement, just for a couple of weeks until I get chance to remove it?

 

[Brown]

Thank you all, I have not measured exactly as there is more movement than could be measured with a feeler guage. But it sounds like it definitly needs doing, hopefully that is the cause of the transmission whine as well. Although I know the transfer box is not too difficult to rebuild myself I have just started a new job so currently dont have the time. I will probably take it ashcroft and get them to do it.


Is tightnening it up worth it in the (very) short term to crudly take out some of the movement, just for a couple of weeks until I get chance to remove it?

Yes, I'd say it was worth trying to adjust it. If the gears are able to move around their teeth will be wearing in some rather odd ways, as they won't be in the position anticipated by the designer. So over time you may end up having even more to replace. The intermediate shaft has a nut (on the end facing the rear of the car) which you might be able to tighten. It'll have a flange which is hammered into a grove on the shaft to stop it undoing so it will take some shifting. The bearings are held in place by a deformable spacer which squashes up as you tighten the nut. There's a video here which shows most of the bits and pieces involved but I hope you won't have to take it all apart like the people on the video do!

Oh, that's probably redundant, because you say at the start you've been watching a video already.

 

[raywin]

I agree it may be worth a try, if you can take off the clamping plate which locks the nut then very slowly tighten the bolt checking the reduction in end float frequently, you will feel the colapsable spacer compressing.
When you feel the float has dissappeared then put the locking plate back.
Do it slowly so you don't put too much pre load on the bearings.

EDIT
Sorry locking plate holds the shaft to stop rotation, not the nut, leave it on and slowly nip the nut up.
Memory going to the dogs, it's a year since I did mine now.

 

[Brown]

I agree it may be worth a try, if you can take off the clamping plate which locks the nut then very slowly tighten the bolt checking the reduction in end float frequently, you will feel the colapsable spacer compressing.
When you feel the float has dissappeared then put the locking plate back.
Do it slowly so you don't put too much pre load on the bearings.

EDIT
Sorry locking plate holds the shaft to stop rotation, not the nut, leave it on and slowly nip the nut up.
Memory going to the dogs, it's a year since I did mine now.

Don't worry, I had to check as well. I remembered the locking tab being on the front of the box and the nut on the back, but of course they're both on the back. Or was it the front?

 

[raywin]

Don't worry, I had to check as well. I remembered the locking tab being on the front of the box and the nut on the back, but of course they're both on the back. Or was it the front?

I know how did I get here, I used to remember stuff but now

 

[dag019]

Lead time from Ashcroft is currently only a week. So if I remove it end of this week and get it sent down to them I should have it back and fitted in two weeks time. Which I think has made up my mind to get them to do it rather than try and do it myself just to save the time while I settle into new job. Also It is not too long to be using the series III as a daily driver. And I this weather the canvas hood will be a joy.