New noise

Hitech · 03-08-2012, 07:43 AM

I have a 2006 CVT which now has 251,000 miles and it has developed a new noise. (drive train). when pulling away there is a noise not unlike a hydraulic pump sound a "whirring" type sound, it increases in frequency with vehicle speed. It either is not present at higher speeds or is lost in the other road noises. The is no change in operation, shifting and is normal. I noticed that in neutral or park it is absent also in reverse it is absent. when shifted into drive or low is is just noticeable as a very low growl which increases with engine speed with the brakes held. The current fluid has about 10K miles on it (Honda CVT fluid). I plan on draining it to take a look at the chip detector on the weekend. any thoughts?

Hitech · 03-10-2012, 07:38 PM

Well, I did a little trouble shooting today and essentially no fault found. I drained the transmission fluid and inspected the chip detector the fluid looked like new (10K on it) and the chip detector was clean with barely the slightest stain like deposits. I guess the car has added a new noise to its personality

NorthwestIL · 03-10-2012, 07:56 PM

I had a bird sound for a year. Only heard it while accelerating and would lose the sound when in neutral or stopped idling. My local mechanic found it was a broken clip on the fire all. I am going to J B Weld the pieces together..

Hitech · 03-10-2012, 08:12 PM

Thanks for the reply, but my noise is coming from the transmission and is Engine RPM dependent when in gear.

diamondlarry · 03-10-2012, 10:31 PM

The sound you are describing reminds me of a hydraulic pump. I've heard cars with low power steering fluid make that kind of whine when the steering wheel was turned. I know pretty much nothing about Insight CVT's but, could it be the transmission pump showing signs of wear or, hopefully not, an impending failure?

Hitech · 03-11-2012, 08:56 AM

I agree on the type of sound I am describing. All I can do is turn the radio up and hope for the best

Hitech · 08-17-2012, 01:50 PM

Well the noise has gotten progressively more intense and I am seeing a bit more "fuzz" on the magnet. I did pull the pan about a month ago and cleaned the internal magnets (there are 4 of them) all had typical black "staining" type of fuzz. At that time, I replaced the internal filter as well. Since the nose started I have put on about 30,000 miles (Total miles 275,000). I am on the hunt for a replacement unit as I think it is not long for this world. I sure wish there was some repair capability in the US but so far nothing. When and I change it out I will tear it down and figure out what the issue was. I will post about it when that happens.

Willie Williford · 08-17-2012, 03:21 PM

From your description, the "pully belt" is starting to wear excessively.

HTH
Willie

Hitech · 09-01-2012, 07:07 PM

Well, the noise is gone, I replaced the transmission. It took about 6 hr and was very straight fwd. I was able to improvise all the special tooling. It's dead quiet now. I will tear the original down and figure out what the issue was.

Hitech · 12-25-2012, 07:42 PM

Well I finally got around to tearing my transmission down to find out what was wrong. on first look I could find nothing amiss, all the bearings that I could see looked good and felt good............... except the ball bearing under the reverse clutch on the driving end of the main shaft. I didn't have a socket large enough to remove that shaft and view the bearing but is feels rough and on careful examination of the phonic wheel and the clutch bell on the driving side reviles witness marks where the phonic wheel teeth are hitting the clutch bell I didn't take any pictures yet because it does not show up on my phone camera I will need to use my Macro camera. I think this accounts for the noise I had been hearing.