3.73 Gears Installed on Manual V-6

[PoorMansCamaro]

Originally Posted by Apex Chase

5-8, depends on the shop. I've seen labor quotes as low as $250 and as high as $900. Usually its around $500.

Originally Posted by Apex Chase

We offer the 3.73s and the install kit as a package for about $775.

So I'm looking at almost 2k for a tune, the 3.73 and kit, and install...

[christianmotox]

Originally Posted by Apex Chase

We offer the 3.73s and the install kit as a package for about $775.

Do you really need the install kit? i mean if my geaes are like 8000 miles old, i dont see why i should replace bearings. i know i need to have the crush sleve. Or is there something im missing here, im used to upgrading gears in 4x4 trucks, and unless you have 40k on a set of gears all you need is the gears and crush sleeve, any reputable shop should have the shims.

[Apex Motorsports]

Originally Posted by christianmotox

Do you really need the install kit? i mean if my geaes are like 8000 miles old, i dont see why i should replace bearings. i know i need to have the crush sleve. Or is there something im missing here, im used to upgrading gears in 4x4 trucks, and unless you have 40k on a set of gears all you need is the gears and crush sleeve, any reputable shop should have the shims.

If you only have a few thousand easy miles then probably not but I would suggest consulting with your installer. Many of the SS guys are discovering greater than expected wear when they have their swaps done.

[Apex Motorsports]

Originally Posted by scrming

Transmissions
Hydra-Matic 6l50 six-speed automatic (LS, LT) w/ TAPshift
Gear ratios (:1):
First: 4.07
Second: 2.37
Third: 1.55
Fourth: 1.16
Fifth: 0.85
Sixth: 0.67
Reverse: 3.06
Final drive ratio: 3.27


Aisin Warner AY6 six-speed manual (LS, LT)
Gear ratios (:1):
First: 4.48
Second: 2.58
Third: 1.63
Fourth: 1.19
Fifth: 1.00
Sixth: 0.75
Reverse: 3.67
Final drive ratio: 3.27

Just some numbers for you guys considering making the swap.

For the M6, cruising at 70 in 6th gear with the stock 3.27s you will be running right at 2000rpm. With 3.73s you will be just below 2300rpm. The swap will realize an equivalent torque gain of approximately 15% or 40.95 rear wheel lb.-ft. of torque.

With 4.10s you would be a little over 2500rpm and will realize an equivalent torque gain of approximately 27% or 75.33 rear wheel lb.-ft. of torque. While the improvement would be significant the cruising rpm is probably too much for most V6 owners.

[PoorMansCamaro]

This may have been answered already, but which is better for daily drivability?

[Apex Motorsports]

Originally Posted by PoorMansCamaro

This may have been answered already, but which is better for daily drivability?

Do you mean between 4.10 and 3.73? I would recommend 3.73.

[PoorMansCamaro]

Yup, thanks. This will be a bday present to myself come November I think

[jagan323]

Careful... I was reading on the SS forums... the 4.10 gears blows up their car LOL. Someone said shifting from gear 1-2 and his car blew up lol. I dont know... seems kinda scary. I'll definately wait till someone installs and runs it a while before I pull the trigger on this one. =p

[Apex Motorsports]

Originally Posted by PoorMansCamaro

Yup, thanks. This will be a bday present to myself come November I think

Talk about a gift that keeps on giving!

[KMPrenger]

Originally Posted by jagan323

Careful... I was reading on the SS forums... the 4.10 gears blows up their car LOL. Someone said shifting from gear 1-2 and his car blew up lol. I dont know... seems kinda scary. I'll definately wait till someone installs and runs it a while before I pull the trigger on this one. =p

X2...somewhere about a month ago I read about the 4.10s causing an issue with someones SS...but I can't remember what the heck it was anymore!!

[Apex Motorsports]

Originally Posted by jagan323

Careful... I was reading on the SS forums... the 4.10 gears blows up their car LOL. Someone said shifting from gear 1-2 and his car blew up lol. I dont know... seems kinda scary. I'll definately wait till someone installs and runs it a while before I pull the trigger on this one. =p

Originally Posted by KMPrenger

X2...somewhere about a month ago I read about the 4.10s causing an issue with someones SS...but I can't remember what the heck it was anymore!!

There have been a handful of 4.10 failure cases but the V6 won't be dishing out the same kind of punishment as the SS. With enough power and abuse anything will break. I think the 3.73s are going to be the better option for the V6 cars anyways.

[Z Madness]

Originally Posted by Apex Chase

There have been a handful of 4.10 failure cases but the V6 won't be dishing out the same kind of punishment as the SS. With enough power and abuse anything will break. I think the 3.73s are going to be the better option for the V6 cars anyways.

I beg your pardon, not as much punishment????? just kidding.

FWIW, I think the 3.73 is very drivable, especially since we have the 6th gear. I also have 3.73 in my LS1 which is a 4spd. auto and does rev. a little high on the freeway but with the 6th gear, I don't think it will be a problem. It may sound like a lot but I think you get your bang for the buck. Its not noticable visually or audibally (like exhaust or CAI), but damn it feels good.

Regarding the install kit, you could save a couple hundo but I would say you will want to change your bearings. Blessedchef changed his auto V6 gears to 3.55 and his mechanic said his bearings were shot and my mechanic was shocked to see how bad mine were with only 1,700 miles (punsihing miles of course). As Chase indicated, many of the SS' have seen the same situation. So if you drive it hard, you're probably better off with the install kit. I'm sure Chase can "hook" you up!

[jagan323]

As mouth watering as this thread is, I still am in an automatic... so maybe I should stop reading on things i cant get =( BUT ITS SO MOUTH WATERING!!!!!!!!

[Z Madness]

Somebody (Chase) should be looking into whether or not the Pumkins can be swapped for the Auto Tranny's. I'm sure you would be able to get some from SS's that are upgrading. I still don't understand Richmond's rationale of 3.55 for Auto's. Maybe someone (Chase) can check with Richmond and see how many 3.55's have actually sold. Oh someone (Chase), please help.