ASD diff
ASD diff
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
If I can find one, whats it take to activate it? How much hydraulic pressure? How does the ASD system know there is wheel spin or does it always activate under 19mph? What is the downside of always activating it? Why 19mph? Is it variable % lockup based on pressure?
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
I can't find out exactly how much power & torque they can handle though, some say 250ish HP is the limit, some say they are nearly indestructable.
Lock up is variable from 15% limited slip with no hydraulic pressure applied to full lock up, most people who fit it to a car that didn't originally have it don't bother with the electronics, & use a master cylinder or grease gun to actuate it manually, There's a guy on http://www.mercedes190.co.uk/ who's using a electric power steering pump from a small Toyota mounted under the driver's seat, operated by a toggle switch to control his ASD diff.
I can't find out exactly how much power & torque they can handle though, some say 250ish HP is the limit, some say they are nearly indestructable.
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
Well this explains why ASD requires electronic speedo pickup. Measuring 1.2mph difference between front and back is tricky business. Everything I have read states that without hydraulic pressure it 30% but that by now it is mostly worn. I am less concerned about launching as I am about actual traction problems. In the rain I have absolute horrible traction. Even on dry pavement I have considerably poor traction in 1st and 2nd. Does the ASD have a pick up on the diff or is that ASR? Whats the difference?
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
First link there gave this bit www.w124performance.com/docs/mb/W124/ASD_Differential_Retrofit.pdf
1987 300D Sturmmachine
1991 300D Nearly Perfect
1985 300D Weekend/Camping/Dog car
1974 L508D Motoroam Monarch "NightMare"
OBK #42
IMO, 30% is a reasonable amount of lockup for a 124 used for spirited street/track/autoX. Should you decide to add the hydraulic part with manual control, you would have a good drift setup. Really no reason at all to use the entire electronic and hydraulic system unless you drive in snow a whole lot.
My GF's '92 2.5 300d has ASD with non-operational hydraulic system. When I'm horsing around I notice the lockup back there, even with the mild motor. I worry about it though. I suspect the limited slip function in her car will suddenly and mysteriously cease to function one day in the near future....
raysorenson
07-19-2013, 11:37 AM #5The % lockup of the clutches is a function of the angle of the dangle of the spider gears. I don't see how wear can have much effect on the % lockup so long as there is friction material left and clutch pack endplay isn't so far out of specs that it makes the spider gear teeth engage each other differently, and even then, it might just increase lockup.
IMO, 30% is a reasonable amount of lockup for a 124 used for spirited street/track/autoX. Should you decide to add the hydraulic part with manual control, you would have a good drift setup. Really no reason at all to use the entire electronic and hydraulic system unless you drive in snow a whole lot.
My GF's '92 2.5 300d has ASD with non-operational hydraulic system. When I'm horsing around I notice the lockup back there, even with the mild motor. I worry about it though. I suspect the limited slip function in her car will suddenly and mysteriously cease to function one day in the near future....
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