Questions for some MM guys

F

Ford-Repair

Ford Senior Master Technician
Ok I have owned my 03 BLK MM for about 5 years now. Only thing I have done to it is JLT Cold air intake, gutted cats, Magna Flow mufflers, Dyno Tune by Eveloution Performance.

My question is, I have a set of 4:10 gears just laying here in my bay at work that I have had for years and I have been very hesitint to install due to loss in fuel milage. How much do you think I will lose and is it worth installing them?
 
Ford-Repair said:
Ok I have owned my 03 BLK MM for about 5 years now. Only thing I have done to it is JLT Cold air intake, gutted cats, Magna Flow mufflers, Dyno Tune by Eveloution Performance.

My question is, I have a set of 4:10 gears just laying here in my bay at work that I have had for years and I have been very hesitint to install due to loss in fuel milage. How much do you think I will lose and is it worth installing them?
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You will lose 1 - 2 miles per gallon rolling at 80 mph.

Worth it?

Every damn penny!

:D :burnout:

MIke.
 
MM2004 said:
You will lose 1 - 2 miles per gallon rolling at 80 mph.

Worth it?

Every damn penny!

:D :burnout:

MIke.
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^^^^^^ What Mike said. ^^^^^

4.10s and a tune are ABSOLUTELY the best bang for the buck on a NA car.

I tracked my mileage both before and after doing the above mods, and saw about a 1/2 to 1 mpg difference, but gained a bunch of performance.
 
Ford-Repair said:
My question is, I have a set of 4:10 gears just laying here in my bay at work that I have had for years and I have been very hesitint to install due to loss in fuel milage. How much do you think I will lose and is it worth installing them?
Click to expand...

:awe:
Get them installed! Word of caution: you will need to work on your face muscles...start smiling as big as you can for about 10 minutes, 2-3 times a day; doing this will keep you from getting face cramps like I did the first couple days after I had mine installed. Every time I get in my MM now, or even think about being in it, I smile. My buddies are always asking me if I just got laid, and I say 'yep'....lol

DO IT!!!!

fastblackmerc said:
Not if you take it easy and use T/C if you have an '04.
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breeze said:
03a representitive
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I have an 03b with T/C. :confused:
 
1 - 2 mpg 0.5 to 1 sec

On the 4.10 install I had done on trilogy #248, I saw a 1 - 2 mpg drop and a 0.5 to 1 second improvement in the 0 to 60 times. The thing I couldn't say was how much of that 1 - 2 mpg was gear induced and how much was right foot induced. You will need a speedo recalibration and possibly want a full retune.
 
breeze said:
ONLY draw back from gears is driving in snow.
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It's all in the tires and driver. My Jmodded, 4.30's, non T/C blower car handles like a DREAM. Much much better than my Escort or my wife's minivan with T/C!

Sent from my Ally using Tapatalk 2
 
I had waited years to install my 4.10 gears. I wish I hadn't waited so long as I did because they made the car that much more fun to drive.

I had no problem driving in what little snow we got here, I also have a dedicated set of snow tires but still made no difference, if anything I think I had more fun. lol
 
The general consensus is that you lose a bit on the highway, but actually gain a little around town if you can keep your foot out of it, so the overall loss is maybe 1-2 MPG...a small price to pay to have a performance luxo-barge.
 
ctrlraven said:
I had waited years to install my 4.10 gears. I wish I hadn't waited so long as I did because they made the car that much more fun to drive.

I had no problem driving in what little snow we got here, I also have a dedicated set of snow tires but still made no difference, if anything I think I had more fun. lol
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How I felt when I put the gears in too.

Depends on the snow tho. When we had the 20 some inches I was moving right through it after a couple days. Now that like snow we got months ago. Barely touching the pedal all she did was spin and wanna go sideways from a dead stop. I have winter wheels too.
 
RF Overlord said:
The general consensus is that you lose a bit on the highway, but actually gain a little around town if you can keep your foot out of it, so the overall loss is maybe 1-2 MPG...a small price to pay to have a performance luxo-barge.
Click to expand...

If I could do this ^^^^ deliberately and consistently ... I 'd probably be on the ToyotaCorolla.Net. ;)
 
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