This is one thing that i just dont understand...why did Chevy put 2.73 gears on the 305 automatics and 3.08 gears on the manual 305s?? Didn't the 5 speeds have enough of an advantage that they had to give them better gears too??????

 

Gas mileage. Far as I know, manuals have always has slightly better gears in the back, compared to autos. Like this with almost all cars.

 

4 compared to 5 is the main reason. without the extra gear they dropped the gear ratio out back. the mans have the extra so they got a higher gear raito(3.08 compared to 2.73)

 

I hate that they did it too. It's basically like Adam said, for gas mileage. My '88 had 2.77's and I absolutely hated it. Not to mention that if you had an IROC with the borg warner rear, you had to either buy a different carrier, or pay out the butt for a spacer plate to put lower gears in the 2.77 carrier. Luckily, my '89 already has 3.27's, so all I have to do is buy the gears.

 

To **** those of us who have them, off!!

 

Ha ha EXACTLY what I was thinking.

 

4th gear in an automatic IS an overdrive gear, the same as 5th gear on the T5.

A 3-speed trans like a TH350 or TH400 are non-OD trans, the 700R4 has a 4th gear, which is an OD gear.

 

What gains would you be looking at switching from an Auto 2.73 Rear to let's say a 3.08 or 3.27?

I'm just wondering, I never really understood the gains from better gearing.

 

why did chevy put the Zf 6 speed in the Vette but not in the L98 Camaro? Why did Chevy didnt put aluminum heads in the L98 Fbody? Cuz Chevy can suck sometimes

 

why did chevy put the Zf 6 speed in the Vette but not in the L98 Camaro?

- ZF 6 speed was expensive to manufacture and installation into an F-body required transmission tunnel mods. This was a primary reason the Anniversary edition was never produced with the vette motor and tranny. The car was a poor seller (in GM eyes) and the added cost would not have helped sales.


Why did Chevy didnt put aluminum heads in the L98 Fbody?

- Aluminum heads did not have crossover ports, and would require a vette style EGR setup. This increase costs for the Exhaust setups.

Bottom line ... they did what they did due to costs. It was a catch 22 ... if they sold more cars, they would have done more stuff ... but if they did more stuff, they would have sold more cars.

But at least if you own one of the "better" cars, you have something more valuable. Sort of like the 60's muscle cars in one sense.

 

All of that may be true, but you also have to look at the other factor. The Corvette. GM would NOT allow the Camaro to be able to run with/outrun their flagship car. Had they put good trannys and heads on the F-body's, they would have.

 

I agree with that, but I think more of it is just related to money.

My 2 cents .... I don't think they "didn't" upgrade the camaro since it would be faster than the vette, rather it was just not worth doing it.

Had the bean counters figured they could sell X% more camaros if they bolted in "vette" stuff, then they would have. Simple return on investment ... at a grand scale. Increase the cost of the camaro by $1000 with cool parts, and sell 10,000 more units. Of course if that were the case, the vette would have received an increase as well to keep it that little extra in front.

If you read the many articles on the 1992 anniversary prototype, it was kie-boshed due to money ... and that's it. The prototype had the vette motor, ZF tranny, headers, chip, 1LE, etc. Hands down would have been as fast as the vette. However the bean counters did not see that cost of modifications were worth it since it was a small inventory.

I'm sure there was a time in the mid 80's where the F-body was kept de-tuned in order to keep the vette faster.

It would have been fun to work in GM proving grounds where all of this "crap" did not exists. They just built them and played with them.

Mark.

 

NOTE: 2005 C6 Corvette Convertible with a Automatic and 2:73 Limited Slip rear. A 4 sec 0-60 car.

 

NOTE: Also has a 500 horse 427 LS1.

 

NOTE: only the ZO6 has the 500hp LS7, and no ZO6 is or will be a convertible, or an automatic, or have 2.73 gears. The 'vert will however get the "base" engine, the LS2, which "only" has 400hp

 

The only nice part about 2.77s is they gave the IROC a 150mph+ top speed And anyone who says "who cars how many times can you go 150mph blah blah blah" you only need to do it once Just to say you did it. I did, and it was great