One of the most
common problems with VW transaxles is their tendency to jump out
of gear for no apparent reason. Despite
the best efforts of conscientious rebuilders to properly adjust shift
forks, rebush gear carriers, tighten detent springs, etc. these gearboxes
can still jump out of gear. This
is expensive and aggravating for both the customer
and the rebuilder. The reason for the failure of these linkage related attempts to fix the problem
is simple: The fork doesn't hold the slider in gear. The slider and gear stay engaged as long as
there is correct tooth geometry. Back in the 70’s, believing the
slider to be the main
cause of the problem, we developed a machine to recut the flanks (sides) of the
slider’s engagement teeth. Extensive tests proved our unique
machining process solved the
jumping out of gear problem.
What we found was, unlike gears with their greater mass, the majority of sliders
of round (most
during factory heat treating).
While rounded corners and
unfavorable tooth angles can be easily seen, uneven tooth spacing
generally cannot. This out-of-roundness
and subsequent uneven tooth
spacing causes some teeth to carry a greater burden of the load than others.
With many gears
having only 3 sets of 3 'fat' drive teeth 120 degrees
apart, (the remaining 21 'skinny' teeth carrying no load), it's
critical that the engagement teeth on the slider be able to contact all 'fat'
drive teeth on the gear evenly. This uneven or asymmetric loading of the slider,
is the most common cause of jumping
out of gear.
Our automated tooling
insures even tooth spacing and improved tooth geometry as the undercut
is slightly steeper than any factory cut. In addition, since
the process removes very little material, excessive backlash is not a
factor. Naturally, sliders that were never factory cut will benefit
greatly as well. The bottom line is that our remachined sliders
are capable of uniform engagement and are able to stay in gear even in high horsepower,
Enterprises has been providing this specialized service to VW transaxle
rebuilders for the past 35 years.
©LONG ENTERPRISES 2000-2012
Prevent jumping out of gear
with remachined sliders...
from Long Enterprises
remachine both new and used sliders and sell them outright (no
core). Prices vary accordingly, so please call for quotes. If you
would like your sliders remachined this is what we need:
the sleeves, especially in the splined area which is where we index
from. Glass beading is not necessary, but preferred. Check your shift fork clearance and reverse teeth.
Also don't forget to check the condition of the
engagement teeth on your gears!
If they're worn, don't use them!
include a note with the following information: How many 1-2 and
3-4 sliders you are shipping.
Tell us if you want standard cut, (street use), or pro
cut (performance/off road), or any additional cut as needed
tell us the method of payment
Visa, M/C or COD (money order, cert. check only).
return ship UPS Ground unless you specify faster.
2475 Morse Road
Sebastopol, CA 95472