Skip to main content

i received a PM about the picture on not all showing, so i went through and found the ones related to the rear narrowed training arms:


Axles are Type 3, Automatic Trans.  either left or right - one of them is shorter due to how the AT is placed in the T3.  i forget which side.  0.93" shorter, but i shoved the CV in more too (both CV's on each axle) and was able to get 1.5" per side with no issues.IMG_0491IMG_0349


Images (2)
  • IMG_0491
  • IMG_0349
Last edited by
Original Post

Replies sorted oldest to newest

sethsaccocio posted:

Hey Paul. Do the type 3 cv axles use a standard type 1 stub axle?


Type 1 and 3 axles are the same diameter/spline so it's the cv joint outer diameter, Seth, that dictates which stub axle (and flange on the trans side) is used, so yes, type 3 axles are used with type 1 parts. Bus cv joints are slightly larger diameter (100 mm vs 90) than type 1 and so require type 2 or type 181 (thing) stub axles and flanges. IIrc bus and thing cv's are the same diameter but are slightly different thickness (I'm guessing the type 4/181 is thicker and uses slightly bigger ball bearings to achieved more angle)? 930 cv's are larger again, at 108 mm.

The bigger cv joints are used off road, as they can take more angle, but the type 1 cv's have proven themselves in all but the most powerful street cars. There are type 1 cv's (and axles) in 11 second cars and they hold up, so it is not worth doing in our cars.

Type 1 cv's maximum angularity is 12°                                                                                      Type 2 (bus)-                                       17°                                                                                        Type 4/181-                                         22°                                                                                        930-                                                      25°

Last edited by ALB

@curtissb wrote- 'Typically the arms are narrowed 1.125 inches.'

Just to let everyone know- with the limited space between the spring plates and fenders we owners (both Speedster and Beetle) have to deal with and the range of wheel widths and offsets available there is no 'typical' or usual amount to narrow the trailing arms. You bring the bearing carrier/mounting surface in whatever distance suits your purpose.  I'll be narrowing mine 5/8 or 3/4" to accommodate the fake 7" 911R wheels I had made up with the extra track of the type 3 hubs (they just fit now with my 'custom' spring plates and type 1 drums). A friend (who I think may have been the first to perform the modification) narrowed his arms 1" to fit 15x8" Fuchs with 225/50-15's and 914 discs on his bug (and they do fit inside the fenders!). Valley Autoworks' jig is set up for 1" but the website says other widths are available (more money because of increased set up time). Al

Curtis- what width wheels and tires are you using? Any pics? Come on-                                                          

                                        SHOW YOUR SPEEDSTER!

Last edited by ALB

Add Reply

Post Content
Link copied to your clipboard.