VW MK2 front CV Axle options
Posted by Josh Wimpey
Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
FYI. Doing some research on axle & CV options of MK2 cars.
VW Motorsport apparently modified their cars in the following ways: --Machined front uprights to accept larger OD wheel bearing from Audi 80 --Ran Audi 80 bearings, hubs and outer CV joints with the bolt rather than the nuts that mk2 outers have. MK2 Outer CV 
Audi 80 Outer CV 
So, I thought there might be a shortcut to getting this setup but then looking more closely, it seems the VW stymied us. Namely, the Audi 80 hub and bearing have a step in them from 39mm to 41mm while the VW parts have a diameter of 40mm with no step. So, in order to do what VWMS did you do have to machine the upright or make a custom hub that uses the 40mm ID bearing already in your MK2.... Wheel bearing & shaft dimensions MK2: 72mm OD 40mm ID 37mm thickness Hubs drilled 4x100mm Splined portion of shaft is 22mm OD Audi 80 75mm OD 39/41 ID 37mm thickness Hubs drilled 4x108mm Splined portion of shaft is 25mm OD Someone else did some calculations showing the Audi 80 parts are 220% stronger. It seems that Driveshaft Shop may have already made a custom hub to fix this issue that they sell with their "Level 3" axles. But, it sure would be nice to just buy the hubs rather than the $1100 axle kit... Will call them tomorrow to see if they would fit and if they can be purchased separately... ____________________________________________________________- One. Class -- 2WD www.quantumrallysport.com http://www.facebook.com/home.php?#/pages/Quantum-Rally-Sport/281129179600?ref=nf Edited 1 time(s). Last edit at 04/03/2016 06:11PM by Josh Wimpey. |
Out of this dumpster fire Elite Moderator Join Date: 08/15/2010 Posts: 1,236 |
Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
Steve Wheeler Mod Moderator Location: Fork Lake, Alberta Join Date: 06/09/2015 Age: Midlife Crisis Posts: 336 Rally Car: 1992 Golf |
Steve Wheeler Mod Moderator Location: Fork Lake, Alberta Join Date: 06/09/2015 Age: Midlife Crisis Posts: 336 Rally Car: 1992 Golf |
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Pete Remner Ultra Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
Steve Wheeler Mod Moderator Location: Fork Lake, Alberta Join Date: 06/09/2015 Age: Midlife Crisis Posts: 336 Rally Car: 1992 Golf |
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Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
Sounds like Derek went the long way around to ending up with VR6-style outers up front
 ____________________________________________________________- One. Class -- 2WD www.quantumrallysport.com http://www.facebook.com/home.php?#/pages/Quantum-Rally-Sport/281129179600?ref=nf |
Steve Wheeler Mod Moderator Location: Fork Lake, Alberta Join Date: 06/09/2015 Age: Midlife Crisis Posts: 336 Rally Car: 1992 Golf |
Pete Remner Ultra Moderator Location: Cleveland, Ohio Join Date: 01/11/2006 Age: Midlife Crisis Posts: 2,022 |
Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
Josh Wimpey Mod Moderator Location: VA Join Date: 12/27/2006 Age: Midlife Crisis Posts: 649 Rally Car: Sneak the Golf |
Should be plenty of meat. The Audi 80 is 25mm diameter at the splines with a hub that presses into a 39/41mm ID bearing. The mk2 bearings are 40mm ID and the same width (37mm) so the hub should still have plenty of meat once machined down. Now if someone could confirm that the Audi 80 outer CV will fit on mk2 (and mk3 4cyl) shafts.  ____________________________________________________________- One. Class -- 2WD www.quantumrallysport.com http://www.facebook.com/home.php?#/pages/Quantum-Rally-Sport/281129179600?ref=nf |
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