I have a 2005 Jeep Wrangler Unlimited Rubicon - manual transmission. I've noticed that I have a chirping noise coming from the engine that is definitely speed related. When the vehicle is moving slowly the chirps slows down and when driving fast the chirp speeds up and gets higher pitched. It doesn't matter if I have the jeep in neutral, 1-6th gear, coasting, or applying the accelerator or break; as long as the vehicle is moving forward you can hear a chirp. But, as I slow and come to a stop, the chirp slows and stops. I can't for the life of me figure out what it is!!! It seems to be coming from the engine compartment(I can hear it through the AC vents). It’s not overly loud but it’s noticeable. It seems like its worse in cold weather. Chirp is audible regardless of the AC or heat being on. Any ideas?
The only thing I can think of is some sort of bearing somewhere …possibly alternator bearing? I just don’t know?
I had a similar issue on mine kept hering chirping from vents or dash, eventually it turned into a chirp with random "knock". took me forever to figure out it was the fan for the ac because of the speed change when driving but turned out to be related to the air comming in through the vents the faster i drove the faster fan blades wobbled. anyhow i poped the fan motor out and there were some leaves and stuff in the fan blades, i just cleaned it up a bit and it all stopped.
I have the same noise on my 05 Rubicon too. Dealer says they are just noisy that way and not a warranty issue. The "console" pops out and you can see right down to the transmission. It's really noisy then, but still was diagnosed as "normal"
Have a local repair facility look at the front and rear universal joints
i have just bought a 306 peugeot estate and it is making a noise if it is catching and it is using a lot of petrol what can i do
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