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Josh Huber
02-14-2019, 05:16 PM
I have a 1997 A4 Quattro that I would like to convert to rear wheel drive but I would also like to be able to change it back to awd easily. If I remove the front axles and hold the front flanges, will all the power go to the rear wheels or will the center diff just spin and not put out any power?

Blazius
02-14-2019, 06:24 PM
Yes, also you cannot just remove front axel because of the bearing , you need cut off the spline and weld it or something , and you also need yo change the center diff ratio.

thedanplasse
02-15-2019, 08:59 AM
If you just take the front axles out, your car won't move. Power will go to the least resistance thanks to open diffs. Garytightpants should have all the info you need. He also may chime in here. GL

Spike00513
02-16-2019, 05:52 PM
what about modifying the quattro system to be more rear-biased? Is that not possible?

I believe the R8 is something like 20/80 split.
There is also a RWD R8 model but the chassis itself is probably balanced (mid rear engine weight placement, etc.)

walky_talky20
02-18-2019, 06:17 AM
Rear bias requires the planetary type of torsen center differential. So you basically have to swap to a 2006+ transmission to attain the default 60/40 split.

The R8 is a different animal. It does not have a center differential. It has a center "coupling". So it is a fully RWD vehicle which adds FWD as needed. For the older models it adds FWD on slip (axle speed difference) via a passive Viscous Coupler, and on the newer models it adds FWD on-demand via an electro-hydraulic multi-plate clutch pack. This is basically Haldex in reverse.

garytightpants
02-18-2019, 08:43 AM
I have a 1997 A4 Quattro that I would like to convert to rear wheel drive but I would also like to be able to change it back to awd easily. If I remove the front axles and hold the front flanges, will all the power go to the rear wheels or will the center diff just spin and not put out any power?

You need to lock the center differential (via welding) AND remove load from the front diff. If you lock the center diff and leave front axles in the car, it will still be AWD, just with out a torque biasing front to rear. his means that he front and rear wheels will be trying to spin at the same rate at all times.


Yes, also you cannot just remove front axel because of the bearing , you need cut off the spline and weld it or something , and you also need yo change the center diff ratio.

No need for machining, just disassemble the outer CV joint and reinstall only the outer CV joint "cup" into the hub.

as seen here...
https://i.imgur.com/mmWdDUt.jpg

Avant Nate
02-18-2019, 10:01 AM
I thought you could do a center diff mod to make it 4:1 bias
https://youtu.be/xGOOxkK9DHU

garytightpants
02-18-2019, 10:31 AM
I thought you could do a center diff mod to make it 4:1 bias
https://youtu.be/xGOOxkK9DHU

That will not make it REAR wheel drive, nor will that allow it to be rwd if he just removes his front axles.

walky_talky20
02-18-2019, 10:56 AM
I thought you could do a center diff mod to make it 4:1 bias
https://youtu.be/xGOOxkK9DHU

That changes the torque bias ratio (the ability for the torsen to do it's torsen-y things). It does not change the default torque split - it remains 50:50 until 2006+.

Blazius
02-18-2019, 11:01 AM
You need to lock the center differential (via welding) AND remove load from the front diff. If you lock the center diff and leave front axles in the car, it will still be AWD, just with out a torque biasing front to rear. his means that he front and rear wheels will be trying to spin at the same rate at all times.



No need for machining, just disassemble the outer CV joint and reinstall only the outer CV joint "cup" into the hub.

as seen here...
https://i.imgur.com/mmWdDUt.jpg

True that.

What is your steering angle btw?

garytightpants
02-18-2019, 04:06 PM
True that.

What is your steering angle btw?

55

Limited by my brake lines at the moment, which is bad. I have it limited to that to not just tear the lines out lol. Been to lazy to make some extended lines. Stock angle measures at 33 after cutting off the stoppers on the knuckles and relocating the lowers 20mm further out.


Sent from my iPhone using Audizine (http://r.tapatalk.com/byo?rid=87676)

Blazius
02-18-2019, 04:38 PM
55

Limited by my brake lines at the moment, which is bad. I have it limited to that to not just tear the lines out lol. Been to lazy to make some extended lines. Stock angle measures at 33 after cutting off the stoppers on the knuckles and relocating the lowers 20mm further out.


Sent from my iPhone using Audizine (http://r.tapatalk.com/byo?rid=87676)

55 degree is still kinda good. You can deffo go drifting with that. What did you do about the tie rods / steering column ?