Whistling noise while accelerating (rather loud) - Land Rovers Only

jarnism · 02-24-2008, 07:14 AM

I own a 2001 Discovery II series with around 100k miles on it. As of lately I began to hear a whistling noise while accelerating on the freeway. It's automatic however the noise comes mainly when in 4th gear and while pressing the gas pedal. As soon as the car kicks in to 3rd gear the whistle noise stops untill the car is again in the 4th gear. Theres no noise while the car is neutral or my foots off the gas pedal. Please help me with this issue as the noise is starting to become very annoying...

Disco Mike · 02-24-2008, 07:23 AM

Open the hood, start the engine and when it is warm, run the RPM's up to around 2500 and see if you hear it.
Could be a bearing, either the idler bearing or the belt tensioner along with the belty or it could be an exhaust leak from a blown head gasket. Need to find it before it becomes worse.
Mike

jarnism · 02-24-2008, 07:27 AM

I tried that but there's no noise when the cars not in gear. The noise is only heard when the gears shift to 3 and 4th I think or also when the rpm is in the mid to high range as the noise dissapears if the rpm is up high or on the lower side

Rovin4life · 02-24-2008, 08:59 AM

if no noise in park check the fluid in the transmission for proper level, if its good and clean then check and change the transfer case fluid. Seen a few get noisy after it gets old.

Most likely the tc, but make sure your ujoints on the driveshafts aren't loose.

02-24-2008, 07:14 AM	#1 (permalink)
jarnism Member Join Date: Dec 2007 Posts: 4 Gallery: 0	Whistling noise while accelerating (rather loud) I own a 2001 Discovery II series with around 100k miles on it. As of lately I began to hear a whistling noise while accelerating on the freeway. It's automatic however the noise comes mainly when in 4th gear and while pressing the gas pedal. As soon as the car kicks in to 3rd gear the whistle noise stops untill the car is again in the 4th gear. Theres no noise while the car is neutral or my foots off the gas pedal. Please help me with this issue as the noise is starting to become very annoying...

02-24-2008, 08:59 AM	#4 (permalink)
Rovin4life Former NAS LR TECH, Current AUS LR TECH Join Date: Oct 2005 Location: DOWN UNDER Posts: 1,884 Gallery: 0	if no noise in park check the fluid in the transmission for proper level, if its good and clean then check and change the transfer case fluid. Seen a few get noisy after it gets old. Most likely the tc, but make sure your ujoints on the driveshafts aren't loose. __________________ I work on Rovers. Got a question just ask.

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02-24-2008, 07:23 AM	#2 (permalink)
Disco Mike Moderator Join Date: Aug 2004 Location: Parker, Colorado Posts: 5,786 Gallery: 0	Open the hood, start the engine and when it is warm, run the RPM's up to around 2500 and see if you hear it. Could be a bearing, either the idler bearing or the belt tensioner along with the belty or it could be an exhaust leak from a blown head gasket. Need to find it before it becomes worse. Mike

02-24-2008, 07:27 AM	#3 (permalink)
jarnism Member Join Date: Dec 2007 Posts: 4 Gallery: 0	I tried that but there's no noise when the cars not in gear. The noise is only heard when the gears shift to 3 and 4th I think or also when the rpm is in the mid to high range as the noise dissapears if the rpm is up high or on the lower side

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