3.73 Gears Installed on Manual V-6

[Apex Motorsports]

Originally Posted by GoPaul

Would I still need the install kit if I was to get a shop to do it or is that required for DIY only?

The are parts inside the differential that are not reusable or should be replaced when a gear swap is performed. An install kit includes those parts.

[Z Madness]

Originally Posted by PoorMansCamaro

So the question might be, is it worth it to get the 3.73's for roughly 10-11 ft lbs of torque more than the 3.55's? What's the difference in price?

For you, the 3.55 is not an option. You also have 4.10 and more though. You have to look at what's available for the SS.

And don't look at is $2,000. Figure the Tune is needed anyway and your bearings are probably shot so you would need to replace them so really you're only paying about $600 for the gears.

[PoorMansCamaro]

Originally Posted by Z Madness

For you, the 3.55 is not an option. You also have 4.10 and more though. You have to look at what's available for the SS.

And don't look at is $2,000. Figure the Tune is needed anyway and your bearings are probably shot so you would need to replace them so really you're only paying about $600 for the gears.

LOL, oh yeah, that's it! lol Good thing i don't have to convince anyone but myself!

[Z Madness]

Originally Posted by PoorMansCamaro

LOL, oh yeah, that's it! lol Good thing i don't have to convince anyone but myself!

Good for you. I just thought I'd offer up some "rationale" in case you had to appeal to a higher power (like I do).

[PoorMansCamaro]

Wish i could get it all plus the pulley at once, but i can't. I'll get the tune first, then possibly the pulley, then the gears. We'll see...I was planning on getting the $400 tune option, but it's starting to look like spending the extra $200 is worth it.

[mike25]

Originally Posted by PoorMansCamaro

Wish i could get it all plus the pulley at once, but i can't. I'll get the tune first, then possibly the pulley, then the gears. We'll see...I was planning on getting the $400 tune option, but it's starting to look like spending the extra $200 is worth it.

are the tunes going through vince?

and also to anyone else as far as an equivelant gain of roughly 40tq, is it an actual gain of that, or is the gearset simply shifting availble power, and putting it in a more useable form..i.e will a dyno yield 40 more tq on average over a stock car with these gears?

[Apex Motorsports]

Originally Posted by mike25

and also to anyone else as far as an equivelant gain of roughly 40tq, is it an actual gain of that, or is the gearset simply shifting availble power, and putting it in a more useable form..i.e will a dyno yield 40 more tq on average over a stock car with these gears?

Your engine isn't producing any extra power, the power you already have is being put to the pavement in a more effective manner. The gears increase the number of times the axles rotate for each rotation of the drive shaft. The performance gain is "equivalent" to adding ___ lb.-ft.. Is that clear as mud?

[Edge.128]

Originally Posted by Apex Chase

Your engine isn't producing any extra power, the power you already have is being put to the pavement in a more effective manner. The gears increase the number of times the axles rotate for each rotation of the drive shaft. The performance gain is "equivalent" to adding ___ lb.-ft.. Is that clear as mud?

makes perfect sense. just using whats already there in a different way.

[PoorMansCamaro]

Originally Posted by mike25

are the tunes going through vince?

Yeah, Vince at Trifecta has the only available tune out for the v6, currently.

[SummitWhiteLS]

Originally Posted by Apex Chase

That could be a concern if you were looking at a torque converter but rear end gears will not have an impact on the transmission, they are downstream from there.

Upstream or downstream, the two are still connected.

Steeper rear end gears are still forcing the trannie to spin up faster.

[Apex Motorsports]

Originally Posted by SummitWhiteLS

Upstream or downstream, the two are still connected.

Steeper rear end gears are still forcing the trannie to spin up faster.

Rear end gears will not impact the function of the drive train upstream from them. The transmission spins the drive shaft which drives the gears, the gears do not exert force of the transmission. If anything they would reduce the load on the transmission because it would take less energy to accomplish the same task as before.

[ROD1]

Originally Posted by Apex Chase

Rear end gears will not impact the function of the drive train upstream from them. The transmission spins the drive shaft which drives the gears, the gears do not exert force of the transmission. If anything they would reduce the load on the transmission because it would take less energy to accomplish the same task as before.

I thought the force at the wheels is what put load on the transmission and the greater the force the greater the load?!

[SummitWhiteLS]

Originally Posted by Apex Chase

Rear end gears will not impact the function of the drive train upstream from them. The transmission spins the drive shaft which drives the gears, the gears do not exert force of the transmission. If anything they would reduce the load on the transmission because it would take less energy to accomplish the same task as before.

Forgetting about "force" for a second, running steeper gears does in fact mean the trannie is spinning up faster.

That means the trannie synchros are being forced to work harder. Seeing how the synchros (especially 2nd gear) is one of the problems being reported on the Aisin trannie, that's not good.

[PieNsky]

Think of it as riding a bike. You are peddling at 10 RPMs and the tires are turning at 10 RPMs. You change gears, however you are still peddling at 10 RPMs. Due to the change of gears, the tires are now turning at 14 RPMs.
The transmission's output shaft is still turning the same RPMs. The input of the rear end is still turning the same RPMs, it is the axles that are now turning faster due to the ratio of the gears being changed.