4:10 or 3:73 gear swap
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Junior Member
Joined: Mar 2007
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From: keller
4:10 or 3:73 gear swap
i have a 98 5.4l... i am pretty sure it has 3:55 stock and i was wanting to switch out my gears... i was told that the 3:73 would be a better choice for everyday driving but i wanted the 4:10 gears for more of a performace aspect... i would also still like to be able to do 100 on the hight way and at least 70 cruising... what do yall think, i run a 10 flat on the 1/8th mile how much of a difference am i looking at....
thanks
thanks
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Junior Member
Joined: Mar 2007
Posts: 8
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From: keller
Nos
i recently posted up a message about getting 4:10 gears, I WANT TO NO WHAT KIND OF LIMITATION THIS IS GOIN TO PUT ON MY TOP SPEED AND STEADY SPEED... i have 255/70 r16 tires.... i was alos considering puttin nitrous on it... i went to SPEEDTEK and they told me that i would be safe running no more then a 100 shot... what are your opinions and what are some good brands and prices and shot selection....
what is a guess at my 1/8th mile time, i run a 10.0 right now with superchips, dual flows, and intake????
thanks alot
what is a guess at my 1/8th mile time, i run a 10.0 right now with superchips, dual flows, and intake????
thanks alot
Senior Member
Joined: Jul 2004
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From: The LBC (Long Beach, CA)
Guys, you will never run out of revs with 4.10s.
The myth that your truck will redline at 90mph is just that...a myth, stemming from the old days of narrow-ration, non-overdrive trannies.
Neal the HP Freak should chime in...he's got 4.10s turning 28-inch tires and he hit over 150mph if I recall correctly.
I've been north of 130mph (calculated) and I still had a lot of revs left...I didn't pull to redline (not sure if I could) and I've got a supercharger. I'll never do that again, BTW...too scary.
I guarantee you that my blown Expedition is faster up top with 4.10s that with the factory 3.31s, which were so tall that it took too much power to turn them.
Here's my engine rpm at various speed with 4.10s.
https://www.f150online.com/forums/sh...d.php?t=263323
As you can see, revs aren't excessive by any means
The myth that your truck will redline at 90mph is just that...a myth, stemming from the old days of narrow-ration, non-overdrive trannies.
Neal the HP Freak should chime in...he's got 4.10s turning 28-inch tires and he hit over 150mph if I recall correctly.
I've been north of 130mph (calculated) and I still had a lot of revs left...I didn't pull to redline (not sure if I could) and I've got a supercharger. I'll never do that again, BTW...too scary.
I guarantee you that my blown Expedition is faster up top with 4.10s that with the factory 3.31s, which were so tall that it took too much power to turn them.
Here's my engine rpm at various speed with 4.10s.
https://www.f150online.com/forums/sh...d.php?t=263323
As you can see, revs aren't excessive by any means