Is the whine from the gearbox or the differential ??
Is the whine from the gearbox or the differential ??
Gents,
Like every Pinz-owner, I have this high pitched whine when driving (not too loud, but still...), however when I am rolling along and I drop it into 'zero gear / free ' approaching a red-light far ahead, the whine stops...
This makes me think that the gearbox gives the whining noise, as it is now disengaged; no gears running, but the differential is obviously still turning.
The only thing at the back of my mind is, that when you drive; the drive-train actually pushes on the differential gears and that that causes the whine, when you disengage there is no more pressure on the gears and the whine stops, so... it still could be the differential (as everyone says it is...)
Anybody that can enlighten me on this ?
Overhauling the gearbox or the differential with new gears is costly no matter what, but I'd really feel bad if it turned out to be the other that needed repair.
I read several articles on the forum about this but they only point to the differential, but could the gearbox give the same whining noise ??
Appreciate your input on this
Jules
Like every Pinz-owner, I have this high pitched whine when driving (not too loud, but still...), however when I am rolling along and I drop it into 'zero gear / free ' approaching a red-light far ahead, the whine stops...
This makes me think that the gearbox gives the whining noise, as it is now disengaged; no gears running, but the differential is obviously still turning.
The only thing at the back of my mind is, that when you drive; the drive-train actually pushes on the differential gears and that that causes the whine, when you disengage there is no more pressure on the gears and the whine stops, so... it still could be the differential (as everyone says it is...)
Anybody that can enlighten me on this ?
Overhauling the gearbox or the differential with new gears is costly no matter what, but I'd really feel bad if it turned out to be the other that needed repair.
I read several articles on the forum about this but they only point to the differential, but could the gearbox give the same whining noise ??
Appreciate your input on this
Jules
Pinz of rock - 710M / 1975 (Austrian Army)
Whine?
I think that most likely you are hearing the wheel drive gearbox (portal axle). They can whine in any gear or free-wheeling. I am using Swepco oil 80-140 in mine and it seems to quiet them a little.
Last edited by Thomas-E on Sun Oct 11, 2009 3:47 pm, edited 1 time in total.
Thomas E.
Sonora, CA
712 Camper
[img][url]M:\avatar\DSCN0010%20(Custom).JPG[/url][/img]
Sonora, CA
712 Camper
[img][url]M:\avatar\DSCN0010%20(Custom).JPG[/url][/img]
I agree with Tom - most of the gear whine is in the wheel drives. The gears
in there are simple spur gears which will make more noise that helical cut
gears (such as those used in the transmission).
I use Red Line Heavy Shockproof Gear Oil (synthetic) in all gearboxes
except the transmission and it seems to reduce the whine a little.
in there are simple spur gears which will make more noise that helical cut
gears (such as those used in the transmission).
I use Red Line Heavy Shockproof Gear Oil (synthetic) in all gearboxes
except the transmission and it seems to reduce the whine a little.
Jay
W3PNZ
710K Kommandowagen
W3PNZ
710K Kommandowagen
Gents,
If it was in the wheel drives, then the whine should slowly reduce as the speed reduces, but in my case the whine stops immediatly after I drop the gearbox in the free position - or even if I push in the clutch -.
But the wheel drives are still rolling, but the whine has stopped....
Any idea how this could happen ??
Also the original Pinzgauer booklet says to use HypoidGetriebeÖl GÖ-Pz-90 - translated: Hypoid Gear Oil GO-Pz-90... But I have not found any reference to this, probably a Gear oil used in the 80's...
Thanks
Jules
If it was in the wheel drives, then the whine should slowly reduce as the speed reduces, but in my case the whine stops immediatly after I drop the gearbox in the free position - or even if I push in the clutch -.
But the wheel drives are still rolling, but the whine has stopped....
Any idea how this could happen ??
Also the original Pinzgauer booklet says to use HypoidGetriebeÖl GÖ-Pz-90 - translated: Hypoid Gear Oil GO-Pz-90... But I have not found any reference to this, probably a Gear oil used in the 80's...
Thanks
Jules
Pinz of rock - 710M / 1975 (Austrian Army)
HypoidJNijst wrote:Gents,
Also the original Pinzgauer booklet says to use HypoidGetriebeÖl GÖ-Pz-90 - translated: Hypoid Gear Oil GO-Pz-90... But I have not found any reference to this, probably a Gear oil used in the 80's...
Thanks
Jules
Hypoid gear sets are a form of bevel gear, but offer improved efficiency and higher ratios over traditional straight bevel gears. Commonly found in axle differentials and used as the ring and pinion gears, hypoid gears are used to transmit power from the driveline to the axle shafts. Because of the spiral design and sliding action of Hypoid gears extreme pressure additives are required.
They still sell hypoid gear oil here! Most looks green in color.
The whine is relative to the loading on the spur gears in the wheel drives.
More load - more whine. Helical gears where originally developed to
reduce noise in gear sets, however helical gears introduce a thrust that is
not present with spur gears, requiring bearings that can absorb said thrust.
That said, the gear whine is part of owning a Pinz - comes with the territory,
so to say. Modern lubricants can slightly reduce the whine, but will not
eliminate it. I chose the Red Line Heavy Shockproof Gear Oil because it
provides a viscosity rating of 75W250, somewhat quieting the gear whine
without increasing the actual viscosity.
More load - more whine. Helical gears where originally developed to
reduce noise in gear sets, however helical gears introduce a thrust that is
not present with spur gears, requiring bearings that can absorb said thrust.
That said, the gear whine is part of owning a Pinz - comes with the territory,
so to say. Modern lubricants can slightly reduce the whine, but will not
eliminate it. I chose the Red Line Heavy Shockproof Gear Oil because it
provides a viscosity rating of 75W250, somewhat quieting the gear whine
without increasing the actual viscosity.
Jay
W3PNZ
710K Kommandowagen
W3PNZ
710K Kommandowagen
Whine
Questions;
Does this whine continue at all speeds under power?
Does the whine seem to change loudness when you let up on the gas pedal?
Is it MUCH louder at high speeds?
You said that it goes away when you press the clutch pedal in, do you also reduce engine speed when you do that?
Are you sure that it is not the FAN?
Perhaps Jim or Dennis could add their thoughts......[/b]
Does this whine continue at all speeds under power?
Does the whine seem to change loudness when you let up on the gas pedal?
Is it MUCH louder at high speeds?
You said that it goes away when you press the clutch pedal in, do you also reduce engine speed when you do that?
Are you sure that it is not the FAN?
Perhaps Jim or Dennis could add their thoughts......[/b]
Thomas E.
Sonora, CA
712 Camper
[img][url]M:\avatar\DSCN0010%20(Custom).JPG[/url][/img]
Sonora, CA
712 Camper
[img][url]M:\avatar\DSCN0010%20(Custom).JPG[/url][/img]
All good questions Thomas, but it is 11:30 at night, no time to drive anymore and the wife keeps calling to come to bed...
I'll try tomorrow and see what i can find out about these interesting questions.
I do know that the whine comes with all Pinzes. A long time ago Dennis wrote a lenghty piece about gear-oil and the differentials, pointing in that direction. It was apiece about reducing sound... Tried to look it up, but just cannot find it right now, his suggestion was also to try different oil before taking differentials apart..
Thanks for all your time and answers
Jules - 710M
I'll try tomorrow and see what i can find out about these interesting questions.
I do know that the whine comes with all Pinzes. A long time ago Dennis wrote a lenghty piece about gear-oil and the differentials, pointing in that direction. It was apiece about reducing sound... Tried to look it up, but just cannot find it right now, his suggestion was also to try different oil before taking differentials apart..
Thanks for all your time and answers
Jules - 710M
Pinz of rock - 710M / 1975 (Austrian Army)
Thomas and other interested.
The whine is pretty much only in the 4th and more so in the 5th gear. In the other gears there is really no whine.
When I let the gas up; the whine reduces as the rpm reduces from the reducing speed.
The whine gets progressively louder & whinier after reaching 40 mph and worst at 50 - 70 mph (in 5th gear). At certain speeds, it seems to gets its sweet spot and really whines...
Again, the moment I push in the clutch , the rpm drops and the whine disappears completely.
I reved the engine to hear if it was the fan, but no whine from reving the engine, only when driving.
Well Pinz-doctors, It was interesting to really get to know the engine and the whining, when and how much...
I am still not sure what it could be, just not enough engine- and mechanical-experience to really pin-point it. Looking forward to interesting answers
Regards,
Jules
The whine is pretty much only in the 4th and more so in the 5th gear. In the other gears there is really no whine.
When I let the gas up; the whine reduces as the rpm reduces from the reducing speed.
The whine gets progressively louder & whinier after reaching 40 mph and worst at 50 - 70 mph (in 5th gear). At certain speeds, it seems to gets its sweet spot and really whines...
Again, the moment I push in the clutch , the rpm drops and the whine disappears completely.
I reved the engine to hear if it was the fan, but no whine from reving the engine, only when driving.
Well Pinz-doctors, It was interesting to really get to know the engine and the whining, when and how much...
I am still not sure what it could be, just not enough engine- and mechanical-experience to really pin-point it. Looking forward to interesting answers
Regards,
Jules
Pinz of rock - 710M / 1975 (Austrian Army)
Yeah, mine does the same thing, I think it's just
characteristic of the Pinz drivetrain design.
Hi Landy,
Drivetrain is pretty general, I know it is a Pinzgauer thing, but by this you mean it is not the transmission / gear-box ?
With the drivetrain you have the differentials that many people point to, or the individual four wheel drives.
Dennis mentioned how gears in the differentials could cause whine and possibly reduce with a different oil.
The wheel-drive is actually new to me, I wonder if the whine could be reduced with new gears ?
Regards,
Jules
Drivetrain is pretty general, I know it is a Pinzgauer thing, but by this you mean it is not the transmission / gear-box ?
With the drivetrain you have the differentials that many people point to, or the individual four wheel drives.
Dennis mentioned how gears in the differentials could cause whine and possibly reduce with a different oil.
The wheel-drive is actually new to me, I wonder if the whine could be reduced with new gears ?
Regards,
Jules
Pinz of rock - 710M / 1975 (Austrian Army)