Good brand for rear gears?

[o2camaross]

Originally Posted by Robin Lawrence

LOL, yeah I can relate to that. Nothing improved milage like the computer controlled closed loop EFI.

From a 2.73 to a 3.73 we only saw about a 1 MPG drop in consumption.

Depends on a lot of factors.

I got the call tonight. I will have a 3.90 in my hands Tuesday or Wednesday of next week. I have a spare diff assembly that we will install the gears.

Robin

once again robin, you are the man. now get working on some 4.10's, 4.30's and 4.56's lol

[vega$]

If your worried about mpg's dont buy the camaro bro.

[Robin Lawrence]

Originally Posted by o2camaross

once again robin, you are the man. now get working on some 4.10's, 4.30's and 4.56's lol

It's not me......LOL, It's my guys at Motive Gear. Now really any gear company can tool up to produce the gears if they want to make the commitment.

I have heard stories about gear sets for the G8 going for $1500.00. Now maybe that is the asking price I don't know how many are selling at that price.

Motive should have the 3.90 available in about 3 months. They are working on the 4.10 but that will come after the 3.90.

There may be other gear cutters developing there own gear sets.

Robin

[Robin Lawrence]

Originally Posted by 69 Hugger

The cars got an OD so it can't /shouldn't be that bad with 3:73 ? need to get a close up of the IRS,

What close up are you looking for?

Maybe I can get something.

Robin

[speedster]

Hey Robin -

Shot you a PM.

Thanks.

[Mindz]

Originally Posted by mmbarberoilman

People jumped all over me when I talked about better gears for my 2SS Auto. Depends what you want. I can not see this car suffer much with a stiff gear. It has that 6 speed trans folks. Think about it. We used to run 3 gears in a turbo 400. Besides not all of us need to go 170 MPH, especially when the plastic front end destoys itself at 155 anyway. PLEASE list any mods needed to upgrade. Anyone that does it PLEASE list costs, mods needed to keep everything else happy and of course performance differences. I want more from my car and it should be relatively easy to get this car scary with just gears and another 100 horses.

Please read the whole thread before spouting off false info...

[rayhawk]

Originally Posted by Robin Lawrence

It's not me......LOL, It's my guys at Motive Gear. Now really any gear company can tool up to produce the gears if they want to make the commitment.

I have heard stories about gear sets for the G8 going for $1500.00. Now maybe that is the asking price I don't know how many are selling at that price.

Motive should have the 3.90 available in about 3 months. They are working on the 4.10 but that will come after the 3.90.

There may be other gear cutters developing there own gear sets.

Robin

Doesn't the G8 have the same rear in it as the new camaro? If so the G8 GXP M6 comes with a 3.70 rear, although that is probably not enough of a difference to really be a worthwhile swap.

[Robin Lawrence]

Originally Posted by rayhawk

Doesn't the G8 have the same rear in it as the new camaro? If so the G8 GXP M6 comes with a 3.70 rear, although that is probably not enough of a difference to really be a worthwhile swap.

Hmmmm, I didn't know that about the 3.70

Let me do some checking......

Thanks for the heads up!!!

Robin

[Hesh]

Originally Posted by rayhawk

I would do a lot of things before I put gears in the Automatic car. Think about it, you are already using 4 gears to go through the 1/4. And the first gear is very low on that trans. You are right that it will not suffer much on the highway with a change in gears, but I don't think it will really be a great performance boost. Now on the M6 car, I think a gear swap will be very worthwhile. Think about it, you are running up against the rev limiter on that car at the track, and will probably have to shift into 4th right at the end of the 1/4 if you add any power.

If I had the automatic car I think the best money would be spent doing the exhaust first, Long tube headers, etc., then the next step would be to get rid of the AFM cam and lifters, and put a decent cam in there. This should get you to 475 crank hp without much trouble, and you could move the rev limiter up to at least the 6600 limit of the LS3. Hell, our 01 z28 auto had a 2.73 rear and only used 2 gears through the 1/4 mile-now that car needed some gears!

And BTW, the plastic front end was a preproduction part, the issue was addressed on all consumer cars. Feel free to do 155 on your daily commute.

Actually the first thing that should be done is go up on the stock stall on the converters. Most automatics do much better with a little bit more stall. Gearing would help alot to. You could get off the line much better with the stall and gears. The 4th gens autos benifited greatly in times with just these two mods. I think we would see the same thing here as well. Then with the other mods you listed, but keep the AFM and use one of the VVT/AFM cams the A6 would be a real beast and keep great mpg.

[Gentry78]

Originally Posted by Warpick

3.73 or a 3.90 is also going to kill your gas milage.

your kidding right going from 3.45 to 3.73 is nothing to gas mileage with 6 gears

at 70mph your only turning about 1900 rpms

hell with 4.56 gears at 60mph your at 1900 rpms

[rayhawk]

Originally Posted by Hesh

Actually the first thing that should be done is go up on the stock stall on the converters. Most automatics do much better with a little bit more stall. Gearing would help alot to. You could get off the line much better with the stall and gears. The 4th gens autos benifited greatly in times with just these two mods. I think we would see the same thing here as well. Then with the other mods you listed, but keep the AFM and use one of the VVT/AFM cams the A6 would be a real beast and keep great mpg.

Good Point! Something would just make me want to get rid of the AFM and bump the rev limiter though to where it belongs.

[Epitaph]

Why would you want to bump the rev limiter? What kind of torque are you hitting after 6600? I believe it starts to drop quite a bit, but we won't know until someone removes it.

[rayhawk]

Originally Posted by Epitath

Why would you want to bump the rev limiter? What kind of torque are you hitting after 6600? I believe it starts to drop quite a bit, but we won't know until someone removes it.

The L99 has a rev limiter set at 6000, in my previous post I said swapping out the cam/lifters would be a nice performance boost, and would allow you to bump the rev limiter up to 6600 like in the LS3.