Prop shaft slip joint

[warrenpfo]

This might be a stupid question but if I have removed the AHC how important is it to grease them??

i will of course still do the UJ's

 

[AndyCook]

what has greasing the slip joint or not got to do with AHC?

non AHC landcruisers have a prop slip joint too, and they need greasing at service intervals

 

[warrenpfo]

I can't see how the prop shaft can/should contract or expand as the vehicle is at a constant height.

I get that the transfer box is fixed and the axels float but being the centre of the axel does it change in height.

 

[adrianr]

The diffs are not centred on the axles, so the axles floating will change the length of the relationship to the centre diff wouldn't it?

 

[AndyCook]

Of course the prop gets longer and shorter via slip joint everytime the truck goes over a bump or when vehicle is loaded an unloaded

Sent from my GT-P1010 using Tapatalk 2

 

[clivehorridge]

IMO, not only suspension action affects the relative positions of the front/rear diffs and the transfer box. Even if considered to be a small amount, under acceleration or more so under heavy power load, such as a steep hill climb, the rear axle (for example) will be trying to compress all the rubber/nylon joints between it and the chassis. This will (in my example) effectively try to shorten the rear prop by a mm or two, hence the need for the slip joint to prevent a direct load on the prop UJs and the diff/transfer box bearings.