Diff gear question Please help....
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
Diff gear question Please help....
I have '11 grand sport a6 with 2.73 diff gear and will like to find out if the 3.42 diff gears from Z06 or Z51 will be able to couple with the a6 diff, and if so what it takes, I called some known trannie dealer and they asked $1,999 to change the gears, is this really necessary thanks in advance for your input, David.
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
Still need help..
I do like to find out if is possible to swap diffs from stick to auto among c6 can anybody chime in as I'm new to corvettes thanks again.
Drifting
Joined: Nov 2005
Posts: 1,745
Likes: 35
From: Turlock CA
Swap the entire differential. The C6 Z06 diff w/3.42 will bolt up to the A6 trans. If you can sell your 2.73 diff it makes it fairly cheap. Do a search as there is a bracket needed to mount the Z06 diff. Many have made the swap.
Personally, unless you are drag racing, I feel the 3.46 gears are too much. I went from 2.46 to 3.15 and that is close to too much. I made the change for autox use. 1st gear is barely usable and with the 3.46 gears it would never need to be used.
--Dan
Personally, unless you are drag racing, I feel the 3.46 gears are too much. I went from 2.46 to 3.15 and that is close to too much. I made the change for autox use. 1st gear is barely usable and with the 3.46 gears it would never need to be used.
--Dan
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
Swap the entire differential. The C6 Z06 diff w/3.42 will bolt up to the A6 trans. If you can sell your 2.73 diff it makes it fairly cheap. Do a search as there is a bracket needed to mount the Z06 diff. Many have made the swap.
Personally, unless you are drag racing, I feel the 3.46 gears are too much. I went from 2.46 to 3.15 and that is close to too much. I made the change for autox use. 1st gear is barely usable and with the 3.46 gears it would never need to be used.
--Dan
Personally, unless you are drag racing, I feel the 3.46 gears are too much. I went from 2.46 to 3.15 and that is close to too much. I made the change for autox use. 1st gear is barely usable and with the 3.46 gears it would never need to be used.
--Dan
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The car is fine on the street as first gear is more than still useable and it also doesn't need a special bracket to install.
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
My car been auto will really benefit from 3.42 diff gears my 1st should become 13 + to 1 gear reduction and where I want it.
One more question, is there a particular C6 ZO6 diff I should avoid or are they all ok?
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
I just did a Z06 diff swap on my '13 A6 GS (many thanks to subfloor for his able guidance
) and I couldn't be happier with the 3.42 gears. It's a whole different car, although I did a FTI 3600 stall at the same time, which does make 1st and second gear practically useless with the stock runflats now. It can't hook at all now in 1st and 2nd and I end up leaving a big cloud of tire smoke every time I launch it.
As subfloor said, it's a straight bolt in and there is no bracket needed. You will need to change the Z06 oil pump/cover and plug the drain and fill holes. Zip has a neat kit with everything you need for that (if you don't want to pull the parts from your stock diff):
http://www.zip-corvette.com/catalog/...category/8288/
The Z06 diff does have a sensor on the top that your car won't have a wire to connect to, but I just left that as is.
However, unless you get a good deal on a used Z06 diff, perhaps the more economical route would be to get an A6 diff from Chuck @ CoW. He quoted me a really good price (cheaper than RPMs cheapest diff) on an A6 diff with the 3.42 gears. I went with the Z06 because Im overseas and it was just too much trouble and costly to bother with returning the core.
Good luck with whichever route you may go.
) and I couldn't be happier with the 3.42 gears. It's a whole different car, although I did a FTI 3600 stall at the same time, which does make 1st and second gear practically useless with the stock runflats now. It can't hook at all now in 1st and 2nd and I end up leaving a big cloud of tire smoke every time I launch it.As subfloor said, it's a straight bolt in and there is no bracket needed. You will need to change the Z06 oil pump/cover and plug the drain and fill holes. Zip has a neat kit with everything you need for that (if you don't want to pull the parts from your stock diff):
http://www.zip-corvette.com/catalog/...category/8288/
The Z06 diff does have a sensor on the top that your car won't have a wire to connect to, but I just left that as is.
However, unless you get a good deal on a used Z06 diff, perhaps the more economical route would be to get an A6 diff from Chuck @ CoW. He quoted me a really good price (cheaper than RPMs cheapest diff) on an A6 diff with the 3.42 gears. I went with the Z06 because Im overseas and it was just too much trouble and costly to bother with returning the core.
Good luck with whichever route you may go.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
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Good luck!
Thread Starter
Melting Slicks
Joined: Jun 2006
Posts: 2,484
Likes: 261
From: Miami Florida
I just did a Z06 diff swap on my '13 A6 GS (many thanks to subfloor for his able guidance) and I couldn't be happier with the 3.42 gears. It's a whole different car, although I did a FTI 3600 stall at the same time, which does make 1st and second gear practically useless with the stock runflats now. It can't hook at all now in 1st and 2nd and I end up leaving a big cloud of tire smoke every time I launch it.
As subfloor said, it's a straight bolt in and there is no bracket needed. You will need to change the Z06 oil pump/cover and plug the drain and fill holes. Zip has a neat kit with everything you need for that (if you don't want to pull the parts from your stock diff):
http://www.zip-corvette.com/catalog/...category/8288/
The Z06 diff does have a sensor on the top that your car won't have a wire to connect to, but I just left that as is.
However, unless you get a good deal on a used Z06 diff, perhaps the more economical route would be to get an A6 diff from Chuck @ CoW. He quoted me a really good price (cheaper than RPMs cheapest diff) on an A6 diff with the 3.42 gears. I went with the Z06 because Im overseas and it was just too much trouble and costly to bother with returning the core.
Good luck with whichever route you may go.
) and I couldn't be happier with the 3.42 gears. It's a whole different car, although I did a FTI 3600 stall at the same time, which does make 1st and second gear practically useless with the stock runflats now. It can't hook at all now in 1st and 2nd and I end up leaving a big cloud of tire smoke every time I launch it.As subfloor said, it's a straight bolt in and there is no bracket needed. You will need to change the Z06 oil pump/cover and plug the drain and fill holes. Zip has a neat kit with everything you need for that (if you don't want to pull the parts from your stock diff):
http://www.zip-corvette.com/catalog/...category/8288/
The Z06 diff does have a sensor on the top that your car won't have a wire to connect to, but I just left that as is.
However, unless you get a good deal on a used Z06 diff, perhaps the more economical route would be to get an A6 diff from Chuck @ CoW. He quoted me a really good price (cheaper than RPMs cheapest diff) on an A6 diff with the 3.42 gears. I went with the Z06 because Im overseas and it was just too much trouble and costly to bother with returning the core.
Good luck with whichever route you may go.
What I did is and I call it the multiplier is a 3 way improvement in the case as my car with auto tranie is Tires first then torque converter and gears, already have the tires they are 345 30 19 Nitto nto5R drag radials then already order the converter is 3,400 stall p a s from Yank I should be getting it by Feb 5th so I'm now after the diff so I can put those tires to good use, then new Nittos d/r look really impressive and can't get no tire spin at all (so far).
Le Mans Master
Joined: Apr 2013
Posts: 5,376
Likes: 1,118
Hey CI thanks for taking your time man do appreciate that, I must say I seen it coming with gears and inappropriate tires = no traction.
What I did is and I call it the multiplier is a 3 way improvement in the case as my car with auto tranie is Tires first then torque converter and gears, already have the tires they are 345 30 19 Nitto nto5R drag radials then already order the converter is 3,400 stall p a s from Yank I should be getting it by Feb 5th so I'm now after the diff so I can put those tires to good use, then new Nittos d/r look really impressive and can't get no tire spin at all (so far).
What I did is and I call it the multiplier is a 3 way improvement in the case as my car with auto tranie is Tires first then torque converter and gears, already have the tires they are 345 30 19 Nitto nto5R drag radials then already order the converter is 3,400 stall p a s from Yank I should be getting it by Feb 5th so I'm now after the diff so I can put those tires to good use, then new Nittos d/r look really impressive and can't get no tire spin at all (so far).
Your car will be a beast with the PAS 3400 and 3.42s. The only reason I did the diff and the converter at the same time is because it's a lot of work to pull the rear cradle to do either and I thought, what the hell, might as well kill two birds with one stone.
Good luck and let us know how it goes.
Race Director
Joined: Aug 2005
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From: Hudson WI
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No worries man. Those 345 NT05Rs are probably what I'm going to put on the car soon. How do they handle in the rain?
Your car will be a beast with the PAS 3400 and 3.42s. The only reason I did the diff and the converter at the same time is because it's a lot of work to pull the rear cradle to do either and I thought, what the hell, might as well kill two birds with one stone.
Good luck and let us know how it goes.
Your car will be a beast with the PAS 3400 and 3.42s. The only reason I did the diff and the converter at the same time is because it's a lot of work to pull the rear cradle to do either and I thought, what the hell, might as well kill two birds with one stone.
Good luck and let us know how it goes.
Burning Brakes
Joined: Jul 2013
Posts: 823
Likes: 7
From: Rosewood Heights IL
I've had the driveline out of my car a few times. When I pulled my diff, I did it on my back in the garage. Had the diff out in an hour from when I put the car on stands.
Have a good trans jack and a tall jack stand to hold up the trans.
Have a good trans jack and a tall jack stand to hold up the trans.
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Yep, swapping just the diff takes under three hours and swapping the transmission and/or converter takes an additional two hours.
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From: Hudson WI
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