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01E front diff swap issue

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 Post subject: 01E front diff swap issue
PostPosted: Thu Nov 05, 2020 7:29 am 
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kickin' tires'n lightin fires

Joined: Mon Mar 02, 2009 7:08 pm
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Location: Asheville, NC
Hey guys,

Had some unexpected front differential movement when swapping front diffs. Is this normal? Research on the forum says just axle cut diameters are different between 5sp and 6sp 01E's.

Here are some details to clue you in. In a rush to get ready for the ShowMe rally, I had newly rebuilt EDU (B5 S4/C5 A6) that I removed large axle cups and diff. Then I put my smaller axle cups (100mm from CQ) with my Quaife differential. The differential had way too much play when grabbing and moving the axle cups. I removed the Quaife diff thinking the play was due to bearing location requiring more shimming. I put the stock differential back in with my 100mm axle cups. From what I recall, there was still too much play. If I had the car close, I'd take the trans apart again but it's getting repaired (crashed it).

What gives?

Thanks!

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 Post subject: Re: 01E front diff swap issue
PostPosted: Thu Nov 05, 2020 8:27 am 
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Joined: Thu Mar 12, 2009 10:42 pm
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Location: Lost Angels, Ca
maybe i really dont understand what you are trying to do, but you cant swap 01A axle cups from (100mm from CQ) to 5 or 6 speed 01E tranny.

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 Post subject: Re: 01E front diff swap issue
PostPosted: Thu Nov 05, 2020 7:21 pm 
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only way to be using 100mm stub axles is from a B5 A4 rear diff or from the pass side of like 4kq/CQ rear?

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 Post subject: Re: 01E front diff swap issue
PostPosted: Thu Nov 05, 2020 8:11 pm 
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speeding-g60 wrote:
only way to be using 100mm stub axles is from a B5 A4 rear diff or from the pass side of like 4kq/CQ rear?


or a B3 FWD front inner CV (which is 108mm) cq axle, and cq outer cv

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 Post subject: Re: 01E front diff swap issue
PostPosted: Thu Nov 12, 2020 1:08 pm 
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kickin' tires'n lightin fires

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Ah, thanks guys! I just found an old thread with confirming information.

I'm still stumped though, here's why; car has a 6sp 01E (code CBL) with 100mm axles. These axle cups wouldn't work in the B5 S4 trans (EDU) as there was far too much slop when grabbing and moving axle cups.

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 Post subject: Re: 01E front diff swap issue
PostPosted: Thu Nov 12, 2020 7:00 pm 
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01E to 01E front diff is all the same AFAIK. i have taken apart many, had a Wavetrac in one, etc. i have ALWAYS used CQ/4kQ pass side rear inner flanges without issue.

perhaps the Quaife is the problem?

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