talk to me guys. input please. im running a 2002 harley f-150, supercharged, JLT cold air intake and a diablosport predator custom tune. and possibly pulleys if i get positive input on my other thread. by the way, gas is not an issue, im creating a weekend warrior.

 

I have 4.10s in my truck and love it.

 

I have a Roush SC with 4.10 gears. They're an awesome combination.

 

I've got a 00 Lightning with 4.10's...I love them performance wise, but the downside is cruising on the interstate (3,000 rpm at about 75 mph) and I run outta gear before the 1/4 mile mark on the strip.
-Joshua

 

My truck runs about 23 to 2400 RPMs at 75 MPH with 4.10s
And yes ( with OD off ) it's about out of gear at the end of the 1/4

 

Does your SuperCrew have a 4r100 tranny or no? and did you compensate for the gears in your tune? I'd love to be able to turn 2400rpms at 75mph.
-Joshua

 

No..4r70w but I'm having a 4r100 put in as we spake!
The odometer has been adjusted so I see a proper speed. 2 different settings depending on what size tire I'm running
My 23" wheels help some but I run the 16s in the winter and it's close to the same.

 

good luck finding 3.93's. nobody seems to make them for the 9.75 axle in your truck. i have 4.10's in my lightning and daily drive it 60 miles round trip to work. still getting about 13 mpg. i'm turning about 2500 rpms at 75 and dont have any problems running out of gear in the quarter mile.

 

I wouldnt personally run anything steeper than a 3.73

 

You don't run out of gear in the 1/4? what is your e.t. and trap speed?
-Joshua