differential question
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 326
From: CA.
St. Jude Donor '13-'14-'15
YES---quite often people will purchase Z06 take-offs which are 3.42's--The Z06 diffs have an "SP" on the tag which means it has shot peened gears --they are supposed to be stronger---You will have to re-use the front cover off your A4 diff as the 6-speed does not have one--it slides right in-- (I bought one off E-B---y for $600 with 5k miles on it) works perfect--
Burning Brakes
Joined: Jun 2006
Posts: 933
Likes: 0
From: St. Paul MN
YES---quite often people will purchase Z06 take-offs which are 3.42's--The Z06 diffs have an "SP" on the tag which means it has shot peened gears --they are supposed to be stronger---You will have to re-use the front cover off your A4 diff as the 6-speed does not have one--it slides right in-- (I bought one off E-B---y for $600 with 5k miles on it) works perfect--
I bought my '04 Z06 rearend off of Ebay for $600 as well but mine only had ~100 miles on it......works perfect.
Melting Slicks
Joined: Feb 2006
Posts: 2,172
Likes: 103
From: Des Moines Iowa
How high a stall did you go with? I've seen several members state in the past that they had good luck with the factory convertor, and several others stated they'd recommend not going over 2800. I haven't done the 3.42 swap.........yet, so am just offering up what I seen others saying.
Burning Brakes
Joined: Sep 2006
Posts: 825
Likes: 0
From: Chicago South Side
all depends on what type of verter you go with. A yank that is built super tight you may not notice at all from what I've heard. My friend put some 3600 in his, and it felt like crap. Go with RPM, they sell very tight ones. Converter technology has come a long way since your 70's hot rods where if you had a stall, it took flooring the pedal to get the thing moving. i have a yank ss3600 and you wouldn't even notice it in there until you take it to the track or give it a romp.
Good luck with whatever you go with though!
Good luck with whatever you go with though!
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Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 905
From: Lake Elsinore, CA
I put the 3.42 from my MN6 into the wife's A4 with a Yank 3200 and upgraded the PCM with new shift points, etc. That car is fun to drive - for an auto. 
http://forums.corvetteforum.com/c5-g...mega-pics.html
http://forums.corvetteforum.com/c5-g...mega-pics.html
Pro
Joined: Jun 2007
Posts: 632
Likes: 6
From: St. Louis Missouri
How high a stall did you go with? I've seen several members state in the past that they had good luck with the factory convertor, and several others stated they'd recommend not going over 2800. I haven't done the 3.42 swap.........yet, so am just offering up what I seen others saying.
I did drive a friends extremely similar modded Vette except he has a Yank 3500. Much tighter. I was surprised it was that high a stall. Drives way superior to mine. plus he got .2 better in the qtr too.
I'm not sure if I should try to have this one restalled or just get something else. May try the one Mike Mercury suggests. Its a tight GM 2450 converter. I think its pretty cheap too.
Burning Brakes
Joined: Jun 2006
Posts: 933
Likes: 0
From: St. Paul MN
Burning Brakes
Joined: Aug 2007
Posts: 988
Likes: 14
From: Hewitt, TX
I put the 3.42 from my MN6 into the wife's A4 with a Yank 3200 and upgraded the PCM with new shift points, etc. That car is fun to drive - for an auto.
http://forums.corvetteforum.com/c5-g...mega-pics.html
http://forums.corvetteforum.com/c5-g...mega-pics.html
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 905
From: Lake Elsinore, CA
You don't have to get a different stall but it does improve performance. Yank stalls are pretty tight so the feel is close to stock. Changing the stall is easy and you're in there already when doing the diff so why not. You will need to reprogram the PCM for new shift points, etc. Don't forget the seal plate on the A4.
I went with 4.10s on my h/c MN6 and love it. 3.90's are great as well.
I went with 4.10s on my h/c MN6 and love it. 3.90's are great as well.
Burning Brakes
Joined: Sep 2006
Posts: 825
Likes: 0
From: Chicago South Side
I have a the Mike Mercury stall also. It really didn't do much for me, but my tuner doesn't know much about auto's so he couldn't do much with it to maximize it. He was even having trouble on the dyno with it. The mike mercury one is pretty nice though, and will flash to about 2200-2400, but isn't much of an improvement over stock.
