Gearbox Whine advice please
Moderator: RichardW
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Gearbox Whine advice please
My 2004 c5 2.0 hdi (110 bhp) (77000 miles) has suddenly developed a gearbox whine in 4th & 5th only. The whine is worse in 5th than 4th and it is worse between 50 - 60 mph. Below 50 mph the box is quiet, above 60 mph I think that there is a faint whine, but it is hard to tell accurately due to the increased road noise.
The whine is only there on very light throttle maintaining speed, acceleration and deceleration the box is quiet. I have changed the gearbox oil which made no difference to the whine, but gear shift is smoother.
Has anyone else got this problem, just wondered if it a common issue. Can anyone offer any advice on this please?
The whine is only there on very light throttle maintaining speed, acceleration and deceleration the box is quiet. I have changed the gearbox oil which made no difference to the whine, but gear shift is smoother.
Has anyone else got this problem, just wondered if it a common issue. Can anyone offer any advice on this please?
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Re: Gearbox Whine advice please
I was going to suggest checking the oil but you beat me to it. I would leave well alone if I were you, its probably a noisy bearing, could be in the gearbox or the diff, in any case it would be a gearbox out job and it will probably go on making the noise for many thousands of miles yet. I have had a number of cars with gearbox whines but never had one fail completely as a result. Ear defenders would be cheaper.
Peter
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Re: Gearbox Whine advice please
Might also be worth checking whether there is a part of the engine or gearbox (or gear change mechanism) which is coming into contact with bodywork, depending on throttle position/torque. Check engine mountings for excessive slop.
Chris
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Re: Gearbox Whine advice please
Any chance it's the fifth gear locking nut loose?
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
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Re: Gearbox Whine advice please
Thanks for the advice.
This might be a silly question, but what is the best way to check the engine mountings?
I guess to check the fifth gear locking nut would be a gearbox out job?
Perhaps I should have mentioned that the gearbox whine only starts once the engine and gearbox are both warm. The longer the run, the louder the whine is. A short local run no noise at at all. A 70 mph motorway run for a couple of hundred miles the whine is much more noticeable. I find it real odd that it only happens on light throttle just maintaining speed. I thought that a bearing would whine more underload, like wheel bearings do.
Thanks again for the suggestions and advice.
This might be a silly question, but what is the best way to check the engine mountings?
I guess to check the fifth gear locking nut would be a gearbox out job?
Perhaps I should have mentioned that the gearbox whine only starts once the engine and gearbox are both warm. The longer the run, the louder the whine is. A short local run no noise at at all. A 70 mph motorway run for a couple of hundred miles the whine is much more noticeable. I find it real odd that it only happens on light throttle just maintaining speed. I thought that a bearing would whine more underload, like wheel bearings do.
Thanks again for the suggestions and advice.
- Paul-R
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Re: Gearbox Whine advice please
That indicates to me gear tooth wear.
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Inside every old person is a young person wondering what the hell happened.
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Re: Gearbox Whine advice please
Thanks for the advice.
I guess the only thing can do is to hope it lasts.
Bearing or gear tooth wear both sound as though another gearbox is going to be required at some point.
I guess the only thing can do is to hope it lasts.
Bearing or gear tooth wear both sound as though another gearbox is going to be required at some point.
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Re: Gearbox Whine advice please
I think you can actually get to the 5th gear by removing the gearbox end plate - you could on the CX anyway. As the gearbox temperature increases the oil gets thinner and doesn't take up wear so well.
Peter
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Re: Gearbox Whine advice please
And on the BX and early C5 I think.
Not sure which gearbox the op has.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
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and lots of Rovers before that: 1935 Ten, 1947 Sixteen, 1960 P5 3-litre, 1966 P6 2000, 1972 P6 2000TC, and 1975 P6B 3500S - x 1752
Re: Gearbox Whine advice please
Sadly, 5th gear wear and vibration is a common problem on many 5-speed boxes, where the extra gear pair was hung on the outboard ends of the shafts, with no additional bearing or side-thrust support on the outer end. This poor adaptation of previous 4-speed transverse boxes hit not just PSA units, but other makes too, including Toyota. In the latter case, replacing with an 'improved' gear set can get rid of most of the vibration/buzz, but it can return again as wear returns.
Chris
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Re: Gearbox Whine advice please
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Re: Gearbox Whine advice please
I think you could be right about the 5th gear. On the gear box there is a pressed steel plate on the end of the gearbox. I guess this plate could be covering the 5th gear which actually sits outside the gearbox. I'll have to try and find an exploded view of the gearbox.
- Paul-R
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Re: Gearbox Whine advice please
I think on the Mk1 C5 it depends on whether it's the 90bhp or 110bhp engine fitted.
The 90bhp engine has the BE3 gearbox and this is the one that we're talking about above. Reverse gear position is opposite 5th gear.
The 110bhp engine has the ML5T gearbox (possibly ML5C - anybody confirm?) and this is built differently and eventually spawned a six speed version. Reverse gear is further over to the left beyond the 1st/2nd gear plane.
The 90bhp engine has the BE3 gearbox and this is the one that we're talking about above. Reverse gear position is opposite 5th gear.
The 110bhp engine has the ML5T gearbox (possibly ML5C - anybody confirm?) and this is built differently and eventually spawned a six speed version. Reverse gear is further over to the left beyond the 1st/2nd gear plane.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
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- (Donor 2020)
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- x 8
Re: Gearbox Whine advice please
Paul-R wrote: ↑23 Jun 2019, 18:04 I think on the Mk1 C5 it depends on whether it's the 90bhp or 110bhp engine fitted.
The 90bhp engine has the BE3 gearbox and this is the one that we're talking about above. Reverse gear position is opposite 5th gear.
The 110bhp engine has the ML5T gearbox (possibly ML5C - anybody confirm?) and this is built differently and eventually spawned a six speed version. Reverse gear is further over to the left beyond the 1st/2nd gear plane.
My car is 110 bhp with 5 speed box.
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Re: Gearbox Whine advice please
I have a late Mk1 C5 and, according to the details sheet Marc dug out for me, she has the ML5C gearbox. She does have the 110BHP HDi engine.
James
ex BX 1.9
ex Xantia 2.0HDi SX
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Ex C5 2.0HDi VTR
Ex C5 2.0HDi VTR
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ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
Ex C5 2.0HDi VTR
Ex C5 2.0HDi VTR
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Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!