4.10's to 3.55's

[95gtconversion]

I'm thinking if my plan is to daily my car I should ditch the 4.10 gears and put in 3.55 gears instead and rebuild my rear end while I'm at it because I can still do the occasional run down the 1/4 mile without having to start in 2nd gear

 

[evilcw311]

I may know someone looking to sell a set of 3:55's................


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[mcglsr2]

Why the swap? 4.10's too annoying on the street (I assume 1st gear is useless)? Looking for more MPG?

 

[95gtconversion]

Yeah it's either going to be 3.55 or 3.73 because first gear is non existent and a pain in the ass

Also the car is getting half of the fuel economy of my pickup

 

[mcglsr2]

Well, if you want better fuel economy and your car has a lot of low end grunt, go with the 3.55. Personally, I think you'll be happy with the 3.55. I have that in my car, with a stock 302 motor (~180whp) and honestly, it drives fine. Which means if you have even more power, you should be happy. The more power you have, the more concerned I would be with the 3.73. And by power, I mean low end torque.

 

[wmfateam]

I went from stock 3.27 to 4.10 and I feel you on the Truck Granny Gear 1st gear. I also do not like the fuel economy( went from 25ish to 20ish). I just had my 3.27 rear end rebuilt and will be putting it back in my 96 GT.

 

[95gtconversion]

Well, if you want better fuel economy and your car has a lot of low end grunt, go with the 3.55. Personally, I think you'll be happy with the 3.55. I have that in my car, with a stock 302 motor (~180whp) and honestly, it drives fine. Which means if you have even more power, you should be happy. The more power you have, the more concerned I would be with the 3.73. And by power, I mean low end torque.

I have a few upgrades and 3.73's are not completely out of the equation but the 3.55's would give me more of that drivability back

 

[95gtconversion]

I went from stock 3.27 to 4.10 and I feel you on the Truck Granny Gear 1st gear. I also do not like the fuel economy( went from 25ish to 20ish). I just had my 3.27 rear end rebuilt and will be putting it back in my 96 GT.

you're lucky... I only get 12mpg on a good day right now if I'm lucky

 

[wmfateam]

you're lucky... I only get 12mpg on a good day right now if I'm lucky

I also drive like a grandma. Since driving on a road course, I drive the speed limit on the streets as I no longer get any kicks from driving the straight lines of Arizona.

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[driftin]

You will see good fuel economy improvement over 3.55's.