mangahas

I feel like they made a 6 speed for better fuel economy. but is the 2005 4 speed auto better in terms of track?

Turbo6TA

Simple answer ...

Had the A4 been better at anything vs the A6, GM would never have dumped the A4 for the A6.

Cuckoo

A6 has paddle shifters.

owc6

Except for the longevity of the A4 tranny.

Turbo6TA

Lisa ...

Are you sure about that?

owc6

Yer funnin' me, right?

Bruze

In general, more gears means you can keep the RPMs closer to the powerband at all times than with fewer gears. Of course, there is a practical limit. Most gearboxes that have over 4 or 5 speeds are overdrives as is the case with the C6 -- I think 5th and 6th are both less than 1:1.

Back in the day, a 4-speed was a big deal over a 3-speed (sticks). The numbers in the original Olds "4-4-2" muscle car meant it had a 4-speed, 4-barrel carb, and dual exhaust.

Turbo6TA

Yup .....

Vette_DD

Corvette Forum members 1/4-mile drag from the C6 Tech forum:

Which one's faster, A4s or A6s?

irok

the A4 4L65E is the strongest auto trany put in any year of C6.easier to tune or rebuild and the majority of tuners are lost trying to tune A6's.ECS and RPM transmission no longer care to build A6's because of all the issues with them.if you find the right builder,tuner for the A6 good luck to you.friends car is on its 4th A6 and will have to see how this one holds up.most conversions done on C6 cars with A6 or M6 go to 4 speed

ben dover

Exactly. My C5 A4 Pulled better than my C6 A6. As you asked, the A6 is all about overdrive to meet corporate fuel economy and avoid the sin tax.

sjw91

Am I blind? I don't see any A4s on that list.

BadAV

No.

Dcasole

till u blow the 3-4 clutch pack seal .......

Dave

BWF07

The A4 has the following ratios;
3.06
1.63
1.00
.070
Standard rear was 2.73 with and optional 3.15

A6
4.02
2.36
1.53
1.15
0.85
0.67
rear 2.56 After 2007 model, the 2.73 became an option.

So as you can see, 4th gear in the A4 was an overdrive while the A6 it does not come into effect until 5th gear. Also the difference is the rear gear is a higher gear in the A6.

If you have the A6, simply use the paddles so you can control the shift points and most likely at the drag strip you will not ever need 5th or 6th.

RobLo

No you're not blind, none there!

windyC6

Usually pros and cons to any kind of tranny set up. Lots of variables to consider. But lets face it....in todays testosterone filled auto world it sounds much better when man can thump chest while saying..."Me have 6 speed, and you have only 4".....:

EVRose

True, there are no A4s on that slow list. Now, lets check out a couple of the fast lists.

Internal Engine Modifications LS2
10.157 @ 129.43 - Stanger383 - 05 A4 - CAI, conv, 3.42, H&C, hdr, ptb, Z06muff, tune, & more, DR - (6370)
10.163 @ 131.08 - Dennis50NJ - 05 A4 Z51 - CAI, cb, conv, ewp, pfast, 3.73, H&C, hdr, ptb, tune, & more, DR - (6493)
10.585 @ 131.43 - DSP300C - 07 M6 – al/fw, CAI, cb, ewp, pfast, 4.10, H&C, hdr, 100maf, tune, DR - (4430)
10.665 @ 133.29 - Braciole - 07 M6 - CAI, cb, dp, ewp, pfast, 4.10, hdr, H&C, tune, DR - (4296)
10.672 @ 128.31 - Justasheet - 05 A4 Z51 - CAI, cb, H&C, conv, pfast, 3.73, hdr, ptb, mh, Z06 Muff, tune, DR - (6510)
10.815 @ 128.07 - Joe G - 05 M6 Z51 - CAI, cb, cam, pfast, 4.10, hdrs, tune, DR - (5758)
10.821 @ 127.85 - Silver93vert - 06 A6 - CAI, conv, fast, H&C, hdr, udp, tune, & more DR - (4579)
10.844 @ 125.83 - Tony B4 - 06 A6 - CAI, cam, cb, conv, hdr, ported int/tb, udp, tune, DR - (4010)
10.87x @ 125.33 - Tek-Newbie - 05 A4 - CAI, cb, conv, fast, 3.42, H&C, hdr, tune, DR

Power Adders LS2 (supercharger, turbo, nitrous)
09.522 @ 144.71 - Tucan26 - 05 A4 - SC, alky, cam, conv, fast, hdr, RPM trans, tune, DR - (6729)
09.732 @ 143.17 - Doug@ECS - 05 A4 F55 -Novi 2200, alky, cam, conv, 3.42, hdr, RPM trans, tune, DR - (3258)
09.905 @ 137.89 - BlownC6 - 07 A6 – SC, alky, Cam, cb, conv, hdr, Fuel sys, tune, & more, DR - (7142)
09.936 @ 136.88 - Tekhombre - 05 A4 - SC, Cartek cus fuel sys, H&C, hf cats, HD rad, tune, DR - (1153)
09.984 @ 135.44 - Shoaf85 - 07 M6 – Upp Twin Turbo, drag pk, fuel sys, twin disk, 4.10, tune, DR - (6363)
10.065 @ 141.65 - Jutskin - 05 A4 Z51 – SC Cam, coil overs, Flipdrive, Fast 3.42, Z06rear, & more, DR - (5901)
10.154 @ 139.08 - Devilish34 - 07 M6 - SC, hdr, meth, pintake, Z06 rear, tune, DR - (6701)
10.227 @ 143.70 - FactoryRaceCar - 05 A4 – TTurbo & alky, conv, 3.42, Z06rear, RPM Trans, tune, & more, DR - (5375)

Larger Displacement (All entries)
07.982 @ 174.44 - Tluck - 05 A4 Z51 - 427cid, turbo, power glide, eldbrock intake, coil overs, & more, tune, DR - (6296)
09.513 @ 148.77 - Todd@RPM - 05 A4 -TT, 427cid, fuel sys, 3.42, L92 heads, RPM Trans, tune, DR - (4274)
09.680 @ 139.20 - JThurik - 10 A6 GS - 377 forged internals, SC, hdr, meth, xpipe, tune, DR - (6722)
09.681 @ 148.36 - Winters 97 GT - 08 M6 - 402, SC, alky, B&B mufflers, tune, DR - (5881)
09.751 @ 147.05 - Icevettez06 - 05 M6 - 402 APSTT, alky, fast, fuel system, Z06 trans, more, tune, DR - (6301)
09.803 @ 141.05 - Pete Champion Motors - 06 A6 – 502 cid, cam, conv, cust intake, hdr,3.15, ph, tune, DR - (7066)
09.895 @ 138.76 - Blue RacerC6 - 05 A4 Z51 - SC LPE 427,N20 (100) & RPM trans, tune, DR - (4273)

RobLo

From what I remember reading, A4's are more desirable if you're building a race transmission or modifying one for the track, they seem to be stronger then the A6's. Me personally, I don't race so I'd prefer the A6 with the paddle shifters...my next C6 will have that setup.

irok

the fastest cars on the lists run 4L65E's