Is there a drastic decrease in gas mileage with 4.10 gears. I'm thinking that 4.10s will be my next mod but most of my driving is done on the highway. Right now I get about 20 mpg. Any thoughts? yay or nay?

 

I got 22.5 MPG with a tune, JLT and 4:10's. I have a S/C now and I get 17.5. Both of these numbers are highway numbers.

-Bryan

 

Before ANY mods, I used to get 19.8 - 21.2 MPG, combination of freeway and in town, with alot of stop and go. I have since installed a Predator tune and 4:10's and I now get anywhere from 18.3 - 19.7, depending upon how "froggy" I feel from day to day.

It's a fantastic mod, trust me, you'll never miss the MPG.

Sean

 

I went from about 16.7 to 16.1 with the swap to 4.10s sitting in DC traffic everyday. It is well worth it.

 

I lost about .5 -.7 mpg in the city with the 4.10's. About 1 mpg on the highway.

 

Add me to the list... not much difference. On the open road, with cruise control set at 80mph, I get 22-24mpg. Around town, on my daily commute, still in the 17-18 range. But, I don't drive like a granny. lol

 

Well, doesn't sound like the loss is too bad. I'm sold, time to make some phone calls tomorrow.

 

Hmmm, wait a minute. If everyone starts changing to 4:10's, my car won't be very special anymore. Forget what I said earlier, 4:10's are BAD. I am getting like 3-4MPG now. You shouldn't install them. :nono:

Sean

 

WERD!

 

Just install a full lengh antenna............no body's got one of those!

 

You realy wont loose much because you will now cruise in one gear higher than your used to.I mean if you cruised local streets in 2nd,you will now cruise the same street in 3rd.Also guys,I just took a weekend trip that I had to drive about 200 miles and I am very happy with the 4:10s.I could cruise at 80 in fifth gear at about 2,600 rpms.In fourth she pulled like a bear on the highway.Realy no downsides to the 4.10s

 

What would be the difference in 1/4 mile time in a stock 5 speed GT

 

Good question, I'd like to know this as well.

 

Chris,

I also have 4.10's and my gas mileage isn't too good at the moment. However, I'm still on the "gear honeymoon" and drive like a freak. I did the JLT CAI, XCAL2 93 tune and the gears at the same time and the difference is huge, especially through 1st + 2nd gears. No more low rpm "flat spot" and if you can hook up, you are sure to be quicker in the 1/4.

I'm only 20 minutes or so from you and if you want we can meet up and go for a spin. I'm always looking for a reason to drive it!

 

All else being equal... I'd say probably a tenth or two... assuming you don't spin the tires.

 

I still have 1 of those.

-Dan

 

me to.........

 

Must be contagious!

Actually, I have the original antenna also, but I noticed yesterday it has a bend about 6" from the top. If it won't straighten, it might get shorter somehow! B)

 

To all of you that went with the 4.10s, is this an easy mod to do or is it something you'd be better off paying someone to do? If any of you have instructions and could post them it would be appreciated.

Thanks,
OD

 

IMO, find someone who does rear ends often and pay to have it done.

Paul