T-birdcobramix said:ive read 4.30's are the best for the 4.6 DOHC motors, i dunno about how they are for the 4.6 DOHC + eaton, KB, or w/e.. but 3.08's suck, i had them in my thunderbird, and i now have 3.27's and i am a bit happier with those, but i want 4.10's. so for the 03-04 cobras 4.10's seem to be the best?
John Himsel said:I put 4:10's in for the seat of the pants.....light to light......0-60.
I have to shift to third at 57mph.........I am either going to a 28" tire or to 3:90's.
For the strip.....I have no idea.....I think most of the winners run 3:55's
John Himsel said:I put 4:10's in for the seat of the pants.....light to light......0-60.
I have to shift to third at 57mph.........I am either going to a 28" tire or to 3:90's.
For the strip.....I have no idea.....I think most of the winners run 3:55's
silvercoffin said:OK if this is here already im sorry but im sick of reading and looking for it!!!
CAN SOMEONE WHO ACTUALLY HAS 4:10 GEARS PLEASE GIVE ME SOME INFO?
Do you have to use 5th gear at the drag strip?
I know someone mentioned 4th gear trap speed being an issue but do you have to use 5th?
If so I wouldnt do it because it just lends itself to more inconsistency in bracket racing..not that a manual car is good for it to begin with
o3SnakeBite said:I had 4.10's in my GT and it made the car an animal.... But I mean i have traction problems now with the 3.55's I couldnt imagine a gear that would make the tires spin even faster... 3.55 seems to be the all around perfect gear for the car... Although I would take a solid rear with 3.90's any day of the week
Hammer said:Like Matt said, 4.10's are AWESOME on the street. From a roll, your car will pull with sheer neck-snapping acceleration.
But at the track, they will only be effective with tires - tires that are taller than stock. There is NO WAY to keep the stock tires glued with 4.10's.
And only gears that are improperly installed make noise. It's a common thing because proper installation of ring and pinion requires lots of expensive specialty tools and lots of experience with gear swaps.
For the NJ/PA boys, I recommend Crazy Horse Racing for the task. Their gear installs are second to none and Matt can attest to that.
:beer:
hwystr said:Crazy - No. A pain to deal with - yes.
Go to stangnet and search the product revies for axle ratio comments. You'll see the 3.08 and 4.10's tend to have "driveline" droans/periods that are magically fixed when they go to 3.73's. Won't happen in every car to the same degree, but you take your chances. Put on some 4.10's, dump the axle damper, great for performance, but not for driveline droan/periods.
Mach1chuck said:The axle damper is not calibrated so closely as Ford might have intended, at least on the Cobra IRS. I installed a new set of FRPP 4.10s, and they ran quiet with no vibration until 65 mph. Above 65mph there was a slight viberation, noticeable only in the door mounted mirrors. I had previously removed the vibration damper with no ill effects, but after running into the vibration with the new gears, I re-installed the damper. Although the damper is supposedly calibrated for the stock 3.55 gears, it eliminated the slight vibration that I was experiencing.