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6-speed swap....yes or no?

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Old 12-27-2011, 07:53 AM
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I too like th op had an auto, well 3 in the same car, boom boom boom, m6 swap...all smiles. can still dragrace it and cruise happily.
Old 12-27-2011, 08:51 AM
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Originally Posted by Thule
over here the 4le60 cars have bin a total failure, constant problems, while most of the m6 cars have bin no trouble at all
Of all the LS1 F-bodies that have been in and out of my group, there have been more problems relating to the M6 setup than the autos. Stock autos in stock cars have held up great, and *properly* built autos in modified cars have held up great.
Old 12-27-2011, 09:03 AM
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I did the A4 to M6 swap. What you should also consider is that unless you already have a 9" or S60 rear, you should factor that into the cost equation as well if you do decide to go the M6 route.

I enjoyed the car both ways, as a stalled auto and then as a M6 car. With the stock rear you won't enjoy getting on it very much because you will worry about toasting that rear every time you shift it hard (Rears have popped on Launch, 1,2, and 2,3 shifts) where the stalled auto is pretty soft on them until you're running low 11s usually.

Decide what you want out of the car. If you're truly done drag racing, then do the swap.

With a MN12 tranny, brand new LS7 clutch/flywheel, new hydraulics, pedals, console, factory color matched wiring, etc plus labor everything was about $2800-3000 installed. Mine was perfect, everything worked. You wouldn't know it didn't come that way stock.

As an aside, my car was quicker as an auto making 23rwhp less on the dyno than it was as an M6. Mostly because I was afraid to launch it too hard. It trapped 1mph faster as an M6 however.
Old 12-27-2011, 11:03 AM
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Originally Posted by melchoir
I did the A4 to M6 swap. What you should also consider is that unless you already have a 9" or S60 rear, you should factor that into the cost equation as well if you do decide to go the M6 route.

I enjoyed the car both ways, as a stalled auto and then as a M6 car. With the stock rear you won't enjoy getting on it very much because you will worry about toasting that rear every time you shift it hard (Rears have popped on Launch, 1,2, and 2,3 shifts) where the stalled auto is pretty soft on them until you're running low 11s usually.

Decide what you want out of the car. If you're truly done drag racing, then do the swap.

With a MN12 tranny, brand new LS7 clutch/flywheel, new hydraulics, pedals, console, factory color matched wiring, etc plus labor everything was about $2800-3000 installed. Mine was perfect, everything worked. You wouldn't know it didn't come that way stock.
A lot of good points here, especially with the rear-end considerations. No point in having the M6 if you have to baby the thing off of the line. BTW how long did it take for your shop to do the swap?
Old 12-27-2011, 11:24 AM
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Originally Posted by myk
A lot of good points here, especially with the rear-end considerations. No point in having the M6 if you have to baby the thing off of the line. BTW how long did it take for your shop to do the swap?
I knew the shop owner so I was there and helped with the entire install including doing the tuning (a required change).

It was probably a day's worth of work. The longest parts were bleeding the clutch, and cutting/installing the clutch master cylinder.
Old 12-27-2011, 09:32 PM
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I know of a couple people that have done the swap and love it. After driving a friend's M6 car, I've pretty much decided to go six speed once my A4 breaks. IMO, M6 cars are a million times more fun to cruise around on the street.
Old 12-28-2011, 01:50 AM
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Originally Posted by melchoir
I knew the shop owner so I was there and helped with the entire install including doing the tuning (a required change).

It was probably a day's worth of work. The longest parts were bleeding the clutch, and cutting/installing the clutch master cylinder.
Wow. I'm officially jealous. And yeah....I forgot about the tuning issues. Don't you have to install a different PCM?
Old 12-28-2011, 06:33 AM
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Originally Posted by myk
Wow. I'm officially jealous. And yeah....I forgot about the tuning issues. Don't you have to install a different PCM?
PCM stays the same, but you need to install an M6 tune. You will need to change the pins on the PCM if you want reverse lockout to work though.

You'll also need to re-tune it on a dyno because the a/f will be off significantly due to the increased load the engine faces with a locked clutch system vs a torque converter.
Old 12-28-2011, 08:41 AM
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You can also send the harness off to have it re-pinned and the extra trans harness spliced in.
Old 12-28-2011, 09:33 AM
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Originally Posted by Badmeat
You can also send the harness off to have it re-pinned and the extra trans harness spliced in.
There's no need for extra trans harness, and sending it off would be far more trouble than it's worth.
Old 12-28-2011, 11:16 AM
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Originally Posted by melchoir
You'll also need to re-tune it on a dyno because the a/f will be off significantly due to the increased load the engine faces with a locked clutch system vs a torque converter.
I've never noticed a difference..
Old 12-28-2011, 11:42 AM
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Originally Posted by the_merv
I've never noticed a difference..
I'm not saying the car won't run if you just swap all current settings to an M6 tune, it will. But you'll probably be leaving a bit on the table until you retune it.

In my car's case it ran fine, but gained only 3rwhp from A4 to M6 until the tune was corrected and the a/f was leaned out adding another 25rwhp. The car wasn't tuned as an auto with the converter locked in 3rd (who would do this??), maybe if it had been then the difference would be minimal after the swap.

Just my experience.
Old 01-07-2012, 03:54 PM
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Im doing the swap now.. Its a pain in the ***. But way more fun...
Old 01-07-2012, 05:19 PM
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Thats a decent price for all the parts. Ive had a few T56 cars and am about to buy my first auto. If I have too many issues ill be swapping a T56 in, gonna give the auto a try first.
Old 01-07-2012, 07:27 PM
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I say go for the M6. JMO. I wanted the M6 because my wife will not drive it. And I like rowing gears.

Last edited by 1bigoldman; 01-09-2012 at 07:59 AM.
Old 01-08-2012, 03:52 PM
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I know the A4 guys are gonna say your car will be slower in the 1/4 but I have very little faith in the reliability of a 4l60. Countless stories about how they dont last & just had to have mine replaced in my 06 pickup with only 77k behind a 4.3. The M6 is much better trans hands down, other than the upgrades to the clutch, shifter & Tick MC so it works better at high RPM shifts I havent had to do a thing to the trans in the 3 yrs I owned it, its easier to PCM tune & better gas mileage too.
Old 01-08-2012, 09:16 PM
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Get a m6 if that is what you want but a well built 60e will last a long time with a H/C car. You have just not had had a good builder yet...My rear is getting rehabbed as we speak but my Bobby Brinkley tranny is going strong...



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