Haldex Unit

graylea · 03-24-2005, 03:01 AM

haldex unit can this cause a noise on full lock

bhb399mm · 03-27-2005, 01:13 AM

i'm a little confused on what you mean...

Kelvin · 03-28-2005, 12:51 AM

Ok, I am too. For starters what is a haldex unit?

graylea · 03-29-2005, 11:48 AM

its the unit that controls the power to the 4 wheel drive

graylea · 03-29-2005, 11:50 AM

its the unit sited at the back that controls the power to the 4 wheel drive

bhb399mm · 03-29-2005, 10:28 PM

haldex is found on the TT, the VW R32 and passat... essentially, these are front wheel drive cars until torque is needed in the rear, then the computer system sends power back there. Quattro, on the other hand, is 80/20 front/rear unless more is needed.

Quote:

Originally posted by graylea@Mar 24 2005, 12:01 AM
haldex unit can this cause a noise on full lock

Quoted post

as for this... explain better.. do you mean.. when all 4 weels are spinning theres noise?

Kelvin · 03-30-2005, 12:02 AM

Thanks Andy for that. To go off a little from the noise issue that graylea started, I assume by TT you mean only the Quattro version and not the standard 2WD.

Edit:-

(after being suitably smacked about the head)
...oops, I mean Brad

bhb399mm · 03-30-2005, 01:16 AM

yeah.. the "quattro" TTs are the ones with the haldex system.. technically they're not even quattro as they use different systems as the true quattro systems found in the A4/A6/A8s... not to say that either system is better .. just different

sirlug · 11-17-2005, 11:26 AM

my EPS light has come on, Audi tell me its the Haldex control unit which need replacing at a cost of aprox £800.00. Anyway, my car makes a clunking noise when turning on full lock. this may or may not be linked to the haldex problem, does anyone know for sure?, Rich.

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03-24-2005, 03:01 AM	#1 (permalink)
graylea Newbie Join Date: Mar 2005 Posts: 7 Gallery: (0)	haldex unit can this cause a noise on full lock

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03-27-2005, 01:13 AM	#2 (permalink)
bhb399mm Veteran Join Date: Oct 2004 Posts: 1,243 Gallery: (0)	i'm a little confused on what you mean...

03-28-2005, 12:51 AM	#3 (permalink)
Kelvin Full Member Join Date: Nov 2004 Posts: 149 Gallery: (0)	Ok, I am too. For starters what is a haldex unit?

03-29-2005, 11:48 AM	#4 (permalink)
graylea Newbie Join Date: Mar 2005 Posts: 7 Gallery: (0)	its the unit that controls the power to the 4 wheel drive

03-29-2005, 11:50 AM	#5 (permalink)
graylea Newbie Join Date: Mar 2005 Posts: 7 Gallery: (0)	its the unit sited at the back that controls the power to the 4 wheel drive

03-30-2005, 12:02 AM	#7 (permalink)
Kelvin Full Member Join Date: Nov 2004 Posts: 149 Gallery: (0)	Thanks Andy for that. To go off a little from the noise issue that graylea started, I assume by TT you mean only the Quattro version and not the standard 2WD. Edit:- (after being suitably smacked about the head) ...oops, I mean Brad

03-30-2005, 01:16 AM	#8 (permalink)
bhb399mm Veteran Join Date: Oct 2004 Posts: 1,243 Gallery: (0)	yeah.. the "quattro" TTs are the ones with the haldex system.. technically they're not even quattro as they use different systems as the true quattro systems found in the A4/A6/A8s... not to say that either system is better .. just different

11-17-2005, 11:26 AM	#9 (permalink)
sirlug Newbie Join Date: Nov 2005 Posts: 4 Gallery: (0)	my EPS light has come on, Audi tell me its the Haldex control unit which need replacing at a cost of aprox £800.00. Anyway, my car makes a clunking noise when turning on full lock. this may or may not be linked to the haldex problem, does anyone know for sure?, Rich.

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