[T3] question one 003 auto trans diff section

[Jim Adney]

William,

I don't have much experience with these. That said, here's what I 
think I can say about ATs and final drives.

Yes, the 2-letter prefix defines the part, so all EBs, etc, should be 
alike inside and out. Every change got a different prefix. I don't 
know final drive ratios, so if they're not in the Bentley or in 
Service Without Guesswork, I'm no help. If you find various sources 
that disagree, I'd go with the one that seems closest to official VW.

Unfortunately, the parts lists don't break things down by the alpha 
prefix, but I note that it only lists 1 ring/pinion replacement part 
at 9:33. That part # has no letter suffix, so it's either the only 
ratio supplied with Type 3s, or it was the first one supplied and the 
only one supplied as a replacement part.

I have one final drive downstairs, so I unpacked it to count teeth. 
It's 11:43 and is stamped G1143, which I take to stand for Gleason 
11:43. Unfortunately, I don't know the history of this final drive, 
so I don't know what it came out of. Someone just gave it to me, but 
my info seems to indicate that it must have come out of a Type 4.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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