Whine when accelerating?

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
epicyclic unit is driven all the time so wether you take power from center or planet casing it is still been driven ,this was a well known fault at one time as on some the epicyclic planet casing would start to come apart, it wouldnt be easy to check either t.box epicyclic or those in auto gear box as it would mean stripping apart boxes ,you would need somebody that knows what to listen for or stephescope, if you put transfer box in neutral and run through gears you could isolate whine to t/box _gear box or some other part of vehicle
 
jamesmartin said:
epicyclic unit is driven all the time so wether you take power from center or planet casing it is still been driven ,this was a well known fault at one time as on some the epicyclic planet casing would start to come apart, it wouldnt be easy to check either t.box epicyclic or those in auto gear box as it would mean stripping apart boxes ,you would need somebody that knows what to listen for or stephescope, if you put transfer box in neutral and run through gears you could isolate whine to t/box _gear box or some other part of vehicle
Click to expand...

No power is transmitted through the eliptical gears in transfer box high ratio. The entire hub rotates at input shaft speed. Therefore there is no load being applied to them and they cannot whine.
 
Not saying you have the same problem as i did (P38) but i had a whining on acceleration and it turned out to be the air con motor, i asked everyone and did a lot of things, 2 years ago got another unit (not knowing that was the problem) and the noise went!!!
 
wammers you might not have had any that do and in general borg warners are a really well designed and dont give alot of trouble except for the cloassic rr ones ,he rear output shaft which were prone to wear on diff splines but that was the only part supplied by land rover to bw ,i used to work were land rover had them reconditioned,and the epicyclic was one of the few bits we had to really test because of whining
 
jamesmartin said:
wammers you might not have had any that do and in general borg warners are a really well designed and dont give alot of trouble except for the cloassic rr ones ,he rear output shaft which were prone to wear on diff splines but that was the only part supplied by land rover to bw ,i used to work were land rover had them reconditioned,and the epicyclic was one of the few bits we had to really test because of whining
Click to expand...

Anything can wear and develop a noise, but in high axle they are not being used to transmit power, so it would be difficult for them to whine. In high axle the power from the gearbox output shaft goes directly via the chain to the diff and output shafts. Only in low axle is there any load on the reduction gears which could cause them to whine. If the OPs whine changes pitch as the gearbox changes ratios then disappears in top gear it could well be the cyclic hubs in the gearbox. If the whine is constant and increases/ decreases with road speed regardless of gear ratio it is more likely a output bearing, if whine is constant on drive but increases as if something is winding down as road speed decreases it is more than likely a pinion bearing. This because as your foot is lifted off throttle the crown wheel drives the pinion giving the winding down noise.
 
i dont think i need you to tell me how a borg warner works, epicyclic is still turning in whatever your using hi or low .iam not saying this is the problem but ,there is a definate sound to the whine epicyclics make compared to brgs or diffs or chains ,yes normaly noise is worse under load,as manual gear box been quiter in 4th when layshaft brgs are worn ,but sometimes it doesnt allways work ,they can whine wether you say they should or not,since none of us can hear or really know the complete symptons a high pitched whine could be a good deal of things
 
Dopey said:
Not saying you have the same problem as i did (P38) but i had a whining on acceleration and it turned out to be the air con motor, i asked everyone and did a lot of things, 2 years ago got another unit (not knowing that was the problem) and the noise went!!!
Click to expand...

Thanks again for all the replies. Had a heater problem last year and it was replaced with a an old unit - now works on 1 or full blast but garage stated that I had to choose between air con or heater, so obviously chose heater! And apparently they shut off air con - so can that be causing whine - especially when accelerating?

jamesmartin & wammers - thanks for the input guys - don't fall out on my behalf - wish you could hear! But will tell my friend what you have said - we are going to slowly isolate the problems - CV joint first as stated. He will check the diff, pinion bearings whilst doing and then we can look at other fixes i.e. epicyles if we can check these.

Will let you all know how we are doing - and maybe even take a few pics. I will see if I can do a video with sound to see if you can hear the whine.
Thanks a lot any further info is welcomed!:D
 
jamesmartin said:
i dont think i need you to tell me how a borg warner works, epicyclic is still turning in whatever your using hi or low .iam not saying this is the problem but ,there is a definate sound to the whine epicyclics make compared to brgs or diffs or chains ,yes normaly noise is worse under load,as manual gear box been quiter in 4th when layshaft brgs are worn ,but sometimes it doesnt allways work ,they can whine wether you say they should or not,since none of us can hear or really know the complete symptons a high pitched whine could be a good deal of things
Click to expand...

Yes i agree it could be a few things. Time to wait and see.
 
While you`re checking everything check the viscous coupling is functioning correctly. Tis not a difficult check and if damaged it will cause wear and damage to all other parts of the drive-train. About £325 from Island4x4 or others or s/hand with no garantee. Coupla hours to fit with no special tools.
 
Just thought I would update you on what has been going on.

Well now replaced 2 CV joints front lhd & rhd (one did have a little play in it).

Steve (he's the good guy doing all the work!) has taken out the old front diff and looks as though it maybe the pinion gears (apparently flapping around a bit if they can do that)! He will put an old diff of his in place tomorrow and test it!

So fingers crossed that this is the whine! Otherwise will be back to glean more help:D

Thank you all for your replies:)
 
V8Eddie said:
Just thought I would update you on what has been going on.

Well now replaced 2 CV joints front lhd & rhd (one did have a little play in it).

Steve (he's the good guy doing all the work!) has taken out the old front diff and looks as though it maybe the pinion gears (apparently flapping around a bit if they can do that)! He will put an old diff of his in place tomorrow and test it!

So fingers crossed that this is the whine! Otherwise will be back to glean more help:D

Thank you all for your replies:)
Click to expand...

That will be your whine. As i said in my first post i believe.:p:p:p
 
Me not being a mechanic thought it sounded like my tyres at first but then it was too noisy and and more metallic. More likely to hear when on a motorway travelling at 60+ but getting the car back today - so will let you know if the noise has gone!

Sorry I couldn't take a video with sound but there are so many other noises (windows rattling, squeaking from dash against a speaker:blabla:) thought you wouldn't hear!:D
 
Well unfortunately it is not the diff - that has been changed as the pinion gears where flopping about a bit! So where do we go from here after 2 CV joints and diff changed, this is digging into my wallet!:eek:

Driving her back tonight, the noise comes into play when you are travelling around 60 - 70mph and sounds more rumbling when you put your foot on the accelerator and then rumbles down when you take your foot off the pedal - you can certainly feel it through the floor - a passenger in the back said they felt it too.(sorry can't describe it any better!)

Viscous couplings are new and have been checked - nothing wrong there.

Well if it is the transfer box - can anyone tell me if it is better to get a reconditioned one rather than fiddling about with epicycles, borg warners - what are they etc etc? Have seen what it looks like - looks a big job but if this is the last check that can be done, then so be it.:(

But would like to hear what you guys have to say before I go ahead - seriously thinking about what Dopey said - is it the air con motor?:confused:
 
Had a heater problem last year and it was replaced with a an old unit - now works on 1 or full blast but garage stated that I had to choose between air con or heater, so obviously chose heater! And apparently they shut off air con - so can that be causing whine - especially when accelerating?
Click to expand...

Mine wasn't working at the time, when it was changed and fixed the noise went
 
take one prop of at time and try it ,check oils ,dont drop all just cap full ,i thought you put second hand viscous coupling in box,check rear prop is alingned,and front isnt further than 30 degrees,you need to run on one prop at a time to narrow possibilities,if you take front prop off and cured,is either front output t/box prop or front axle ,rear prop off cures it rear axle rear prop rear ouput housing,niether t/box ,if was t/ box would go for another as very easy to build but parts are expensive
 
V8Eddie said:
Well unfortunately it is not the diff - that has been changed as the pinion gears where flopping about a bit! So where do we go from here after 2 CV joints and diff changed, this is digging into my wallet!:eek:

Driving her back tonight, the noise comes into play when you are travelling around 60 - 70mph and sounds more rumbling when you put your foot on the accelerator and then rumbles down when you take your foot off the pedal - you can certainly feel it through the floor - a passenger in the back said they felt it too.(sorry can't describe it any better!)

Viscous couplings are new and have been checked - nothing wrong there.

Well if it is the transfer box - can anyone tell me if it is better to get a reconditioned one rather than fiddling about with epicycles, borg warners - what are they etc etc? Have seen what it looks like - looks a big job but if this is the last check that can be done, then so be it.:(

But would like to hear what you guys have to say before I go ahead - seriously thinking about what Dopey said - is it the air con motor?:confused:
Click to expand...

So it's not a whine anymore it is now a rumble. Suggest you check the rear T/Box output bearing. As this carries a very heavy brake drum that could cause a rumble if it's on it's way home. Winding up and down with throttle speed change is classic pinion bearing though.
 
jamesmartin said:
take one prop of at time and try it ,check oils ,dont drop all just cap full ,i thought you put second hand viscous coupling in box,check rear prop is alingned,and front isnt further than 30 degrees,you need to run on one prop at a time to narrow possibilities,if you take front prop off and cured,is either front output t/box prop or front axle ,rear prop off cures it rear axle rear prop rear ouput housing,niether t/box ,if was t/ box would go for another as very easy to build but parts are expensive
Click to expand...

Hi jamesmartin,
sorry to be such a dumbo in parts but is this the visc unit attached to the fan?:confused: Or are there further visc units elsewhere?
If yes, Steve, today thought there was too much play in it - should be stiffer and not able to freely move the blades. It was fitted new from Paddocks in June 2010 - for an 11 blade fan. He did ask if my temp gauge registered more than half way - no it doesn't, as i always keep an eye on temp just in case!

So by dropping props, one at a time and checking oil and aligning back could isolate problem. If not then second hand t/box is the better solution.

Where is the best place to get a 2nd hand t/box bearing in mind have to have it shipped to France?:)
 
wammers said:
So it's not a whine anymore it is now a rumble. Suggest you check the rear T/Box output bearing. As this carries a very heavy brake drum that could cause a rumble if it's on it's way home. Winding up and down with throttle speed change is classic pinion bearing though.
Click to expand...

Hi Wammers,
Driving back tonight it was definitely more rumble than whine. Will get me good friend to check the t/box output bearing (if he hasn't already done this). But front diff the pinion bearings where definitely flapping on the old unit, so that has cancelled that one out.

So down to I believe, viscous coupling (if that is the one attached to the fan), t/box output bearing, taking off props etc(as per jamesmartin post).

This is a full time job doing this, I think after this there shouldn't be anything else going wrong for a long time (said very quietly!!) You guys must have big pockets??????
:5bbanghead:
 
V8Eddie said:
Hi jamesmartin,
sorry to be such a dumbo in parts but is this the visc unit attached to the fan?:confused: Or are there further visc units elsewhere?
If yes, Steve, today thought there was too much play in it - should be stiffer and not able to freely move the blades. It was fitted new from Paddocks in June 2010 - for an 11 blade fan. He did ask if my temp gauge registered more than half way - no it doesn't, as i always keep an eye on temp just in case!

So by dropping props, one at a time and checking oil and aligning back could isolate problem. If not then second hand t/box is the better solution.

Where is the best place to get a 2nd hand t/box bearing in mind have to have it shipped to France?:)
Click to expand...

Think he means the viscous coupling in the transfer box. You can write on here and describe what you think is a whine and rumble and get nowhere. All people on here can do is point out what it maybe. Get someone who knows what they are about to listen to it for you, a proper mechanic will tell you what it is in a few minutes.
 
You must log in or register to reply here.

Similar threads

MrGorsky
P38A Rattle when in gear and foot on brake...(SOLVED)
2
Replies
22
Views
3K
Flossie
Flossie
Military Mobility
Help identifying high pitched whine
Replies
12
Views
2K
lynall
L
Military Mobility
Help needed identifying high pitched whine
Replies
2
Views
1K
Military Mobility
Military Mobility
dv8i
Transmission whine
Replies
4
Views
699
frog hopper
frog hopper
Felix_110
Thumping sound/knocking noise when rolling out
Replies
5
Views
2K
tottot
tottot
Back
Top