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Re: 4 KQ gearing

In a message dated 98-02-19 14:48:51 EST, Bruce writes:

>One of my favorite threads; but, we never seem to be able
>to figure out what Audi did with any predictability.  It
>was either Todd Candey or Chris Semple who took apart an 86
>or 87 and found a  gear tooth count that indicated a 4.11:1

Yup, that'd be me. I had watched that debate for 3+ yrs on the list and had
the opportunity to pull the side cover off of an authentic '87 4000q trans. I
marked and counted out the ring and pinion and to my surprise came out with
4.11. This wasn't what I had expected as any multiple 4000q owner could tell
you, the '84's top out much sooner. The difference isn't in the final drive,
it's in the gear ratios 1-5. That's why those '84 boxes are sought after by
the rally/roadrace crew. Every 4000q/Quantum Synchro came off the line with
the same finals....'cept Bruce's :)  I knew I should've traded cars at

And Harrison added..
"once again, this is "according to Audi" (for what it's worth), the 5000
quattro should have a 3.89 rear end"

Careful, you're in the biz, the 5000q's were 4.11's, the 5000tq's were 3.89's.

And from Scotty..
"The 84 and early 85 4000q's had a .83 fifth with a 4:11 final, 3.89's were
never installed in the 4000q's as far as parts replacement is concerned.
The rule of thumb for Audi's up until 90 model year is if it has a turbo and a
5spdQ gearbox it got 3.89 gears. Same as the Porsche 944 non turbo's.
The non turbo quattro's got 4:11's.  "

Give the man a cigar! Couldn't have said it better myself. Definately one of
Audi's better ongoing myths, right up there with the 2.3L 4000q(don't get me

-Chris Semple
'87 4000q
   '83 TQC
       '83 TQC
           '88 Ford E150 Club
               '98 Classic 21' trailer