Purchased new; now has 14,000 miles. Fifth gear (only) exceptionally noisy; sounds a lot like valves clattering. Other gears (1 - 4, 6) sound normal. Dealership mechanics say not to worry, but none of the "loaner" bikes they've provided during service calls are as noisy as mine is in 5th gear.
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert who has written 50 answers of more than 400 characters.
An expert whose answer got voted for 20 times.
Re: 2007 FLHTCU Transmission Noisy 5th gear
Wow, valves and other related engine noises don't care what gear you are in, they still make the noise. However your motor may be "lugging" in 5th gear which can cause a symptom of an engine related issue. You may have an issue with the actual gearbox its self. There is a primary drive chain that may be worn which will cause excessive noise in top gear because it is putting the greatest load on the engine. This is what connects the engine to the transmission. I think there is a tensioner for your model that will allow you to adjust the free play in the primary drive chain. If not I strongly recommend replacement because this will cause major damage if it breaks.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
planetary gears are normally straight cut spur gears and will be noisy in operation. There may be wear in the shafts that they run on and there may be needle bearing wear. Normally you will not hear the noise as you are inside the car. The whine is an indication of a mechanical problem and will be there in all gears . There is a possibility that the noise is from the diff but if you listen carefully when driving if it is there under load but changes on over run(coasting) then it will be the diff of is on and off when you hold a steady speed it will be the diff. Have an accredited transmission specialist shop give you another opinion but if it is the transmission I would not race out right away to have it replaced.
IS it noisy all the time or just when trying to get 5th gear? Hopefully just when trying to engage fifth gear. It is likely a bent shift fork. If noisy all the time a keeper on one of the shafts may have failed allowing gears to go where they aren't supposed to or a bearing has let go. Either way you will need to open up the tranny and investigate.
It may be worn out valve lifters that are inside the engine. If you have more than 6,000 miles on the oil, valve lifters could run noisier. Changing to a high mileage type of motor oil may quite down the valve lifters noise somewhat. Synthetic oil used during the summer months could make it noisier too. If you can hear the noise while driving the car, it is not normal. Upon acceleration, if it gets noisier, you will be needing a valve job in the not to distant future.
Are you sure it's not the idle air valve as they can sound louder after changing to a high flow filter...take the filter off and shine a light in the intake when turning the ignition on and off. The idle valve is just inside the intake in a hole at the top...see if it moves in time with the noise that you hear
that would be your transmission, that is at fault. Probably a bad synchro-gear, try double clutching into 5th. If you can get into 5th that way then it is a bad synchro and you need a new transmission/rebuild.
Hey I have a 1999 cavalier z24 5spd All my gears work except 5th while puttting it into 5ht gear as i let out of the clutch its grinding so i cannto put in 5th or it will grind, but at times it would work, but recently as Ive been driving I go to put it in 5th, there isn't a grind its as 5th gear is just netural NEED HELP geoff
but no there was definitely a loud whirring noise in 5th gear sort of like a very noisy bearing. The bike still ran in 5th but it was definately becomming increasingly noisy. When I changed down to 4th the noise went away even if I slowed to the rev range I had been cruising in 5th. Same story with the other gears, but the noise returned with a vengence in 5th. Needless to say I rode the rest of the way home in avoiding 5th.
Any ideas? I suppose I'm looking at a gearbox strip? Could the noise be anything else? ,Had a similar issue with my 1000S, only 5th gear was noisy - a sound like a dry bearing -other gears were silent. Bike had done 70,000kms and serviced correctly.
Had Barry from IME check it out. Turned out to be both 5th gears needed replacing - looked like the case hardening on the gear faces was eroding and pitting.
New gears went in and the box properly shimmed and happy to say 6000 kms later all still silent in the gearbox department. Plus the added benefit of slicker gear changes.,,,
There is a permanent fix for the 5th gear failure on the NV4500 5spd, but its not cheep! Quad 4x4 has a new patented main shaft and gear that is guaranteed for life (torque king ) it will be the last fix you do . none of the other after market shafts will hold 5th gear on ...Only the quad 4x4.com has the only completely new design