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Audi Coupe Quattro 7a --> 1z TDi swap questions

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  • #16
    Are you calculating that with the CQ 01A, or the sedan 01A? The sedan has a slightly taller 5th gear than the CQ.

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    • #17
      Well, it'd be the 5th from a DGW 01A from a 1996-1998 A4 TDI Quattro... Which 5th is 0.66... Very tall.

      There's O1E 6 gears that the 6th is 0.56!

      I'll calculate with stock 01A... But thanks I had notice it was taller on the Sedan but didn't think of making the calculations I think it'll Rev too high.

      Do you know if I can swap the rear diff ring and pinion from a B4 into our B3 casing? There 3.89 instead of 4.11.

      Thanks

      ​​​​​​

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      • #18
        No, you can't.
        1989 Audi 80 Quattro
        1994 Audi 80 Quattro Competition

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        • #19
          It has been tried, and can't be done. If you can find a UrQ rear diff, that will give you the final gearing you are looking for. I know a couple people who have put them into B3's.

          From what I have found, the B3 sedan has a .769 5th gear, and the CQ has a .838 5th gear. I'll be dropping in a sedan 01A into the CQ I'll be picking up soon.

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          • #20
            I found out that the 5th of the 01A DGW or EEP is 0.659

            That probably be enough to make decent rpm on the highway with 4.11.

            Is changing the 5th gear impossible too?!

            Other question is how to find : 012 311 361 CF

            Thanks

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            • #21
              Also, does that 01A bolt to a 4cyl or not? I've heard the drilling was meant for both since found in both applications...?

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              • #22
                Ofcourse it does. 4 cyl came with 01A gearbox from factory.

                You'll also need the matching input shaft and matching gear for that shaft.
                Last edited by M2ki; 8th May 2019, 16:09.
                1989 Audi 80 Quattro
                1994 Audi 80 Quattro Competition

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                • #23
                  You may find this thread of use.
                  http://theprojectpad.com/viewtopic.php?t=686

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                  • #24
                    I'm gonna say what everyone else is thinking -this is just sacrilege!

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                    • #25
                      Why not use a more common 5-cylinder TDI, either an AEL or AAT? Just feels more proper in a Cq. Plus they actually have some jam, and will still return excellent mileage. I think Martin was getting 1000 km or better per tank in his sedan.
                      Find me on Instagram @pry4sno
                      2010 Golf Sportwagen TDI /// Wifey Mobile
                      1992 80q 20v /// Eventual AAN'd Winter Sled
                      1990 Cq /// Project: Because Racecar

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                      • #26
                        Originally posted by M2ki View Post
                        Ofcourse it does. 4 cyl came with 01A gearbox from factory.

                        You'll also need the matching input shaft and matching gear for that shaft.
                        So you mean the input shaft is not the same diameter as the ones in 7a's?

                        Thanks for the input guys... I'll look into that when I'm in front of a computer

                        Cheers

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