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

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