Drive Train Bits and Pieces
Posted: Sat May 04, 2013 12:17 pm
Excuse what might be basic questions - also a couple of issues in the one thread.
I appreciate the gearbox and rear diff is in one basic housing but are they separated inside? If not separated inside why the dual drain plugs and the two filler plugs. On filling the gearbox/diff unit today I noticed the passenger side (RHD) filler is a little lower than the driver side as I was filling via the drivers side and the oil ran out the passenger side and when the filler plug on that side went back in another couple of hundred ml went in before it came out that filler whole.
As I have mentioned previously I have a growlie front end and I am not sure where it is coming from - as far as I can tell it could be coming from a bearing in the hubs, one of the CVs, diff bearings or the front bearings of the drive shaft in the chassis tube (I under stand it is turning all the time when moving irrespective of whether 4wd is engaged). Any other options??
The noise is obvious from as soon as you move, is loud but does not seem to get louder with speed - infact at 75kph it cannot be heard over all the other noises.
To check if it is the front bearings in the chassis tube I intend to jack the back off the ground and run in gear (making sure the front wheels will not turn) and see if the noise it there.
Next I will also jack the whole car off the ground and with it is gear running will lock one front wheel at a time and see which side is making the sound (or if both sides make the sound pointing to diff bearings).
I am open to suggestions on further testing or suggestions on common faults that might be causing this noise.
Note - if I just turn each of the front wheels in turn by hand the noise is not obvious and there is no roughness felt in the motion.
Thanks
Oh - my big offroad test last week showed up a number of oil leaks from the swing arms - it turned out that most of the leaks were in fact from the new split boots on the diff ends - I did not use sealant on them and I should have done as the clamps do not tighten them enough but also the center two bolt heads pull through the rubber so the split in the boots open up. Yesterday I took the rear boots back out - I used sealant on the housings and the surface of the boot's joining surface and along the split - I also installed small washers on the inner two bolts and nuts that secure the split - I let the lot cure for 24 hours and went for a drive today - all OK with just small leaks from the fulcrum. So the lesson is to use sealant on your boots and use little washers on the centre nuts and bolts.
Garry
I appreciate the gearbox and rear diff is in one basic housing but are they separated inside? If not separated inside why the dual drain plugs and the two filler plugs. On filling the gearbox/diff unit today I noticed the passenger side (RHD) filler is a little lower than the driver side as I was filling via the drivers side and the oil ran out the passenger side and when the filler plug on that side went back in another couple of hundred ml went in before it came out that filler whole.
As I have mentioned previously I have a growlie front end and I am not sure where it is coming from - as far as I can tell it could be coming from a bearing in the hubs, one of the CVs, diff bearings or the front bearings of the drive shaft in the chassis tube (I under stand it is turning all the time when moving irrespective of whether 4wd is engaged). Any other options??
The noise is obvious from as soon as you move, is loud but does not seem to get louder with speed - infact at 75kph it cannot be heard over all the other noises.
To check if it is the front bearings in the chassis tube I intend to jack the back off the ground and run in gear (making sure the front wheels will not turn) and see if the noise it there.
Next I will also jack the whole car off the ground and with it is gear running will lock one front wheel at a time and see which side is making the sound (or if both sides make the sound pointing to diff bearings).
I am open to suggestions on further testing or suggestions on common faults that might be causing this noise.
Note - if I just turn each of the front wheels in turn by hand the noise is not obvious and there is no roughness felt in the motion.
Thanks
Oh - my big offroad test last week showed up a number of oil leaks from the swing arms - it turned out that most of the leaks were in fact from the new split boots on the diff ends - I did not use sealant on them and I should have done as the clamps do not tighten them enough but also the center two bolt heads pull through the rubber so the split in the boots open up. Yesterday I took the rear boots back out - I used sealant on the housings and the surface of the boot's joining surface and along the split - I also installed small washers on the inner two bolts and nuts that secure the split - I let the lot cure for 24 hours and went for a drive today - all OK with just small leaks from the fulcrum. So the lesson is to use sealant on your boots and use little washers on the centre nuts and bolts.
Garry