Vibrations from drive train or gearbox ?
Discussion
Hi,
Just wondering if I'm the only one "suffering" from cabin noise and vibrations, or am I just to picky ?
It's difficult to describe, but it is especially noticeable going around 50 mph and changing gears from 4th to 5th. The engine revs drop and while keeping the same speed or slightly accelerating, the cabin noise is louder than before. There is also a noticeable increase in vibrations on the gear stick.
Do I have a problem with my gearbox ? (since I own the car I have to change into 5th first before going to reverse, this seems odd for a "modern" gearbox but I was told all need that ?)
Cheers Peter
Just wondering if I'm the only one "suffering" from cabin noise and vibrations, or am I just to picky ?
It's difficult to describe, but it is especially noticeable going around 50 mph and changing gears from 4th to 5th. The engine revs drop and while keeping the same speed or slightly accelerating, the cabin noise is louder than before. There is also a noticeable increase in vibrations on the gear stick.
Do I have a problem with my gearbox ? (since I own the car I have to change into 5th first before going to reverse, this seems odd for a "modern" gearbox but I was told all need that ?)
Cheers Peter
pmessling said:
The 5th first to reverse is normal as there is no synco for reverse we all have to do it. Don't do it and it will crunch.
Its worth mentioning that while we all have to pre-select before reverse, try to vary the pre select gear around. 5th gear tends to go kaput the most, and thought to be related to owners getting lazy and only selecting 5th.FUBAR said:
Its worth mentioning that while we all have to pre-select before reverse, try to vary the pre select gear around. 5th gear tends to go kaput the most, and thought to be related to owners getting lazy and only selecting 5th.
Yes but it may be that fitting one of these would be the most effective option, as the stock part is seems to be universally derided.http://www.5speeds.com/t5.htm
I fully intend to do the mod next time the gearbox comes out, I just hope it's not too soon as I'm running out of willing helpers, and I can't do it by myself!
ukkid35 said:
FUBAR said:
Its worth mentioning that while we all have to pre-select before reverse, try to vary the pre select gear around. 5th gear tends to go kaput the most, and thought to be related to owners getting lazy and only selecting 5th.
Yes but it may be that fitting one of these would be the most effective option, as the stock part is seems to be universally derided.http://www.5speeds.com/t5.htm
I fully intend to do the mod next time the gearbox comes out, I just hope it's not too soon as I'm running out of willing helpers, and I can't do it by myself!
djstevec said:
ukkid35 said:
FUBAR said:
Its worth mentioning that while we all have to pre-select before reverse, try to vary the pre select gear around. 5th gear tends to go kaput the most, and thought to be related to owners getting lazy and only selecting 5th.
Yes but it may be that fitting one of these would be the most effective option, as the stock part is seems to be universally derided.http://www.5speeds.com/t5.htm
I fully intend to do the mod next time the gearbox comes out, I just hope it's not too soon as I'm running out of willing helpers, and I can't do it by myself!
BTW - I fitted this kit as part of my gearbox rebuild, its simple to do and is great peace of mind.
pmessling said:
Well seeing as my box is currently sat on the garage floor and will be being sent for a Heath check and reseal be rube not to fit it.
+1 Also the book looks interesting too, I already have :-
How to Rebuild and Modify Your Manual Transmission Robert Bowen. This covers the T5 (bought for my honda boxes)
The factory T5 WC rebuild manual is available here http://www.gforcetransmissions.com/T-5_Service_Man...
robsco said:
I think I may know what you mean, and both of my AJP Cerbs have done it. There is a specific spot in fourth gear under load when there is a marginal increase in cabin noise and gearstick vibration. I just presume they all do it as I have never experienced any related issue.
Agree. Mine is at 2100-2200rpm although seems mostly exhaust relatedThank you all for your input, there are some interesting points.
Don't know much about gearboxes but if I understand it correctly, the Counter Gear Stabilizer is particularly effective in 5th gear. I could imagine a worn aluminum casing can cause the shaft to vibrate. In my case the vibrations can be felt on the gear stick and are "viewable" in the rear view mirror. The mirror starts vibrating (possibly in the 2000rpm range) so the car behind can not be recognized.
Unfortunately, the video doesn't show how much of the gearbox has to be taken apart and what special tools are required.
Don't know much about gearboxes but if I understand it correctly, the Counter Gear Stabilizer is particularly effective in 5th gear. I could imagine a worn aluminum casing can cause the shaft to vibrate. In my case the vibrations can be felt on the gear stick and are "viewable" in the rear view mirror. The mirror starts vibrating (possibly in the 2000rpm range) so the car behind can not be recognized.
Unfortunately, the video doesn't show how much of the gearbox has to be taken apart and what special tools are required.
crypto said:
Thank you all for your input, there are some interesting points.
Don't know much about gearboxes but if I understand it correctly, the Counter G
ear Stabilizer is particularly effective in 5th gear. I could imagine a worn aluminum casing can cause the shaft to vibrate. In my case the vibrations can be felt on the gear stick and are "viewable" in the rear view mirror. The mirror starts vibrating (possibly in the 2000rpm range) so the car behind can not be recognized.
Unfortunately, the video doesn't show how much of the gearbox has to be taken apart and what special tools are required.
Now you mention the mirror vibration; I understand, I get that too. However I don't spend much time at 2k revs Don't know much about gearboxes but if I understand it correctly, the Counter G
ear Stabilizer is particularly effective in 5th gear. I could imagine a worn aluminum casing can cause the shaft to vibrate. In my case the vibrations can be felt on the gear stick and are "viewable" in the rear view mirror. The mirror starts vibrating (possibly in the 2000rpm range) so the car behind can not be recognized.
Unfortunately, the video doesn't show how much of the gearbox has to be taken apart and what special tools are required.
. It's just NVH ( noise, vibration, harshness) NVH is an issue that plagues all manufacturers, hence why we have vehicles with dual mass flywheels, loads of dynamat, foam pads, fluid filled engine mounts etc in order to refine vehicles. I prefer older cars with character when NVH wasn't as important.
(I did fit solid engine mounts to a track car once, boy was it brutal! Feedback & control = great; driving on the motorway = earplugs. In the end the mounts went for a compromise mount seen as it was also a road car = NVH compromise.)
However excess gearstick vibration needs investigating.
Hth somewhat.
Tanguero said:
The factory T5 WC rebuild manual is available here http://www.gforcetransmissions.com/T-5_Service_Man...
Thank You. For a gearbox rebuild you need loads of newspapers & wd40 for 'cleaning' dirt and grit free. A prepped garage bench is fine, kitchen worktop better!
(Tongue in cheek, Corian worktop, the other half would kill me) however I did use the oven to dry a newly painted wing mirror once! The suggestion of a dishwasher as a parts washer got the same response)
I digress....
-Craig
Tanguero said:
djstevec said:
ukkid35 said:
FUBAR said:
Its worth mentioning that while we all have to pre-select before reverse, try to vary the pre select gear around. 5th gear tends to go kaput the most, and thought to be related to owners getting lazy and only selecting 5th.
Yes but it may be that fitting one of these would be the most effective option, as the stock part is seems to be universally derided.http://www.5speeds.com/t5.htm
I fully intend to do the mod next time the gearbox comes out, I just hope it's not too soon as I'm running out of willing helpers, and I can't do it by myself!
BTW - I fitted this kit as part of my gearbox rebuild, its simple to do and is great peace of mind.
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