The earlier DU trannys had a 7 tooth pinion gear..the later ABD or ACW
ones have a 6 tooth pinion...the 6 teeth are larger but wear out quicker
than the earlier 7 tooth stuff....its only a wear issue and not a
stronger issue from what I see.
Daryl of AA Transaxle
Duvall, WA.(Seattle area)
(425) 788-4070
1-877-377-0773 toll free
http://www.aatransaxle.com (web site)
On Tue, 5 Sep 2000 22:05:34 -0700 Joe Tu <joetoo2@YAHOO.COM> writes:
> Hello,
>
> I have a 90 Vanagon. Which had the ABD coded tranny which has 6/29
> ring and
> pinion. The original one broke its main input shaft, so then we had
> that
> rebuilt, then the rebuild lasted about 25,000 miles before the ring
> and
> pinion on it blew up. I've done some mods to my motor so it makes
> more
> torque, and I drive pretty hard. The 2nd rebuild we got is from a 84
> Vanagon, DU coded one. This has a 7/34 ring and pinion and it has
> 3rd and
> 4th gears with more TPI (teeth per inch). The guy at the shop which
> we
> rebuilt it said that this is the strongest wbx tranny that VW made,
> and I
> believe him. This is a smooth tranny. the 7/34 gears are a lot
> quieter and
> smoother. He also said that these gears cost a lot more than the
> 6/29 gears,
> $450 vs. $700+. I shall see how long this one lasts, so far it is
> working
> great. The 7/34 is a 4.86 which lowers my top speed, and 3rd gear is
> a 1.26
> vs a 1.22, so it accelerates a bit faster. I just wanted to ask the
> list
> members who also have the DU coded manual tranny about their
> experience, and
> also the tranny people if this is the truth that the DU coded tranny
> is the
> strongest 4spd.
>
> Thanks!
>
> Joe