P38A Front axle noise / rotational grind

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.

ukadamwest

Well-Known Member
Posts
2,990
Location
Surrey
The P38 has developed a hum/grind that feels like it is coming front the front axle.

On the straight there is no noise or grind, when i say grind its not that noticable.. yet. i feel it and hear it, its a low tone, not high pitched and only occurs when the wheel is turned, even slightly.

My first thoughts were wheel bearing, however it happens if the wheel is turned a few degrees left or right. there doesnt seem to be a bias. i did get underneath and also give the wheels a firm shake to see if there is any bearing movement, whithout much anticipation as being as heavy as these are.

i slid myself under the front end earlier and the front diff at the propshaft seal shows a fair amount of seepage. Would a worn diff give such a noise. i notice it in the over run also, i.e. when i back off the trottle and the road is driving the drivetrain. would propshaft UJ give such symptoms >

in my MOT a few weeks ago i got an advisory on the ball joints, not a failure, just an advisory. any thoughts ? i'm considering as the ball joints need doing to overhaul the fornt axle. The wife is using it as the baby carrier at the moment !
 
Mine started off as this until it started to whine, a youtube video said it was front diff but it actually turned out to be u/j's in front propshaft, caps had worn through on one side
 
  • Like
Reactions: 8ha
t
Mine started off as this until it started to whine, a youtube video said it was front diff but it actually turned out to be u/j's in front propshaft, caps had worn through on one side
that would be chuffing handy if it is i have new UJs to go in
 
If oil is seeping from the diff, is there any oil left in there? They do tend to be noisy with no oil, more so when the wheels are turned left or right as the diff has to cope with the rotational differences.:rolleyes:
i'd be inclined to say probably not.

thanks for the input keith i wondered if it was the diff as it was consisent with both left and right steering movements

i'm in a hotel at the moment, as I'm Catterick Garrison for work as i'm leaving doing a handover and start new job next week. planning on pulling the diff cover this week and having a looky look.

seeing as my ball joints need doing, i'm toying with the idea of an axle swap. there's one the bay at the moment for £130 from 80k miler.
 
Noise increased by turning right or left on mine, more right than left from memory so did think diff was suspect or cv's but prop it was, itslike driving a totally different vehicle now thank God
 
Just to follow up.

I changed the diff oil a couple of weeks ago it came out quite clear which is good.

Finally had a period where it's not raining and not at work and jacked it up to have a look through the drive train.

At 140k the propshaft joints have no play, the viscous coupling test shows a good result CV joint rubbers unspoilt and unperished and the driver side wheel bearing gives about 1mm of play. the nearside none. diagnosis would dictate that the wheel bearing noise is in fact a wheel bearing!

And of course it makes sense to do both front bearings as with the same mileage the nearside will not be far behind.

Seeing as the hub will need to come off for the wheel bearing it makes sense to do the ball joints at the same time.

I'm thinking of bearing replacement rather than the whole hub. a few years back a replacement hub was close to 300.

Edit to add: island do a hub with a Timken bearing for 175.!
 
Last edited:
Buy the complete hub5 adam i did my bearing fitted new timken bearing but i had access to a 30 tonne press and it was still a ball acke and i had to grind a bit off the hub to get it in the press.

Just do the one for now nothing to say the other will let go any time soon. Then again you do like to over cover all options lol
 
yeah thats what i decided to do. i cant get hold of my guy with the ball joint press so will leave that until another occasion. i'm wondering though, the ball joints were flagged for movement on the same wheel. i'm wondering the the ball joints are good but it was the bearing movement they caught
 
yeah thats what i decided to do. i cant get hold of my guy with the ball joint press so will leave that until another occasion. i'm wondering though, the ball joints were flagged for movement on the same wheel. i'm wondering the the ball joints are good but it was the bearing movement they caught

Another case of NVQ mechanics doing MOT's i suppose. ;):D
 
Or, Not Very Qualified. When i did MOT's you had to have served a five year apprenticeship and been out of it two years to even be considered. Looks like standards have dropped.
I had to educate a young lad who was moting the E type, he wanted to advise on play in the front wheel bearings. I explained they were taper bearings and were meant to have a little play otherwise they would seize, I dont think he believed me because he went and asked his dad who said he should listen and learn.
 
I had to educate a young lad who was moting the E type, he wanted to advise on play in the front wheel bearings. I explained they were taper bearings and were meant to have a little play otherwise they would seize, I dont think he believed me because he went and asked his dad who said he should listen and learn.

Yep five thou to push the pads back.
 
Back
Top