2.97 Final Drive ratio vs. 3.33

[maybe2fast]

The Reatta has the 2.97 ratio, in the manual it says its for faster acceleration is this true. I thought the higher the number the snappier the ratio. What do you guys think?

[GutlessSupreme]

higher # = faster + worse gas mileage

lower # = opposite

[maybe2fast]

the buick manual said 2.97 was installed for quicker acceleration

 

its a 4t60, just like my 4t60 only difference is 3.33 in the Lumina and 2.97 in the Buick.

[Guest TurboSedan]

is the Reatta alot lighter than the Lumina? that could be why.

[maybe2fast]

lol the Reatta is like 40 or 50lbs more in curb weight than the Lumina

[dbtk2]

Lower number equals slower acceleration, but lower revs on the freeway (higher MPG) and higher theoretical top speed. Higher numbers equals quicker acceleration but more revs on the freeway and a lower theoretical top speed. Seeing that going from 2.97 to 3.33 gearing will only give you about a tenth in the quarter, I would rather have the 2.97's because gas mileage would be so much better. Just my opinion though. My Calais has 3.91 gearing... Nothing like turning 3200rpm down the freeway in 5th.

 

Shawn

[Guest TurboSedan]

My Calais has 3.91 gearing... Nothing like turning 3200rpm down the freeway in 5th.

 

Shawn

 

i have 3.85 FDR in my GTS and 3.61 FDR in my Cutty. then again you have to take into consideration overall gear ratio of course.

[maybe2fast]

really it would work out to one tenth difference! screw it lol thanks fellaz. I was just conserned that it was a big difference and I was missing out on alot of potental.

[WhiteOut]

is the Reatta alot lighter than the Lumina? that could be why.

 

Reatta's are chubby since they're built on the same platform (a shortened version) as the Toronado, Riviera, Eldorado and Seville. I think the curb weight on Reatta's was around 3400-3500 lbs. The larger cars on the platform weighed about the same...go figure.

[93CutlassSupreme]

i ordered a 3.73 ratio on my Colorado because i want acceleration. a higher # gear wasn't offered, if it was i would have bought it

[WhiteOut]

A 3.73 is plenty high enough, especially with gasoline at $2/gal. Besides, isn't 3.73 the rear end ratio and not the final drive?

[93CutlassSupreme]

A 3.73 is plenty high enough, especially with gasoline at $2/gal. Besides, isn't 3.73 the rear end ratio and not the final drive?

 

rear axle ratio.

 

 

i thought we were talking about axle ratios. did i miss something? i am running slow today

[maybe2fast]

we are talking about the trans final drive ratio, your truck will have a final drive ratio and a rear end ratio. FWD only have the FDR.

[93CutlassSupreme]

we are talking about the trans final drive ratio, your truck will have a final drive ratio and a rear end ratio. FWD only have the FDR.

 

because the trans and axle are the same unit?

[maybe2fast]

for FWD yes

 

for RWD there is a final drive ratio and a rear axle ratio

[cutlassdude96]

2.97 is what all early 3800's got

[maybe2fast]

well now I don't feel special at all :?

[Canada]

Some RPO code help.....

 

F79 = 2.97

FR2 = 2.93

GT7 = 3.33

[cutlassdude96]

Some RPO code help.....

 

F79 = 2.97

FR2 = 2.93

GT7 = 3.33

 

GX3 is 3.33 for me

[jeremy]

A 3.73 is plenty high enough, especially with gasoline at $2/gal. Besides, isn't 3.73 the rear end ratio and not the final drive?

 

my fiero was a 4:10 4spd.....it was nice pickup wise, but it rev'd high on the highway...