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3.55 Gear Ratio?

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Old 10-14-2012, 04:59 PM   #41
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Originally Posted by smurfs_of_war

Go 4.10. The difference between a 3.73 and 3.55 with a 4.6L is going to be far from earth shattering. If you're going to regear it- 3.73 is almost moving laterally.
Let me add to that. If you're running with a 4.6l and really want to liven it up for pulling, the 3.73 will yield a difference for sure, but not enough that you'd be happy with the time and money spent. Just my humble opinion. The 5.4 was the engine designated as the hauler- not so much the 4.6 but it will do the job. It just needs a few enhancements to make up for the lack of torque
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Old 10-15-2012, 03:08 AM   #42
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Just my personal experience... I have an 03 4.6L with 305/70/16 on it and 4.10 gears. The 4.10's made a huge difference and am glad I did it. The stock 3.55's were very sluggish and none existent for acceleration so I'm very happy with my set up and the gears have about 8,000 miles on em now
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Old 10-15-2012, 11:55 PM   #43
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ok i see a lot of people talking about the gears and such but never thought to mention to anyone when regearing a 4x4 you have to change the front too. but i hear a lot of guys not putting in the same gear ratio in the front its usually always the slower gear ratio is that true??
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Old 10-16-2012, 11:32 AM   #44
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I had 4.6 with 3.55 and 33s for 6 months and it totally sucked. It strained so hard to accelerate and was very hard to make it stay in overdrive. Recently swapped to 4.11s and a detroit locker and i absolutely love it. Feels like i have a stock truck again no more sluggishness
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Old 10-17-2012, 04:15 AM   #45
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Originally Posted by ford mann View Post
ok i see a lot of people talking about the gears and such but never thought to mention to anyone when regearing a 4x4 you have to change the front too. but i hear a lot of guys not putting in the same gear ratio in the front its usually always the slower gear ratio is that true??
That is somewhat true. I regear'd to a 4.56 from a 3.55 on both diffs. The front is a reverse cyt and sets up on an 8.8 axle and the rear is a standard cut and sets up on a 9.75 axle. I have heard that the front set is 1 tooth short of the rear, so technically youre right. But it is still advertised as a 4.56 ratio reverse cut kit. They MUST be the same ratio or you will cause serious damage once 4WD is engaged!
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Old 10-19-2012, 01:16 AM   #46
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That is somewhat true. I regear'd to a 4.56 from a 3.55 on both diffs. The front is a reverse cyt and sets up on an 8.8 axle and the rear is a standard cut and sets up on a 9.75 axle. I have heard that the front set is 1 tooth short of the rear, so technically youre right. But it is still advertised as a 4.56 ratio reverse cut kit. They MUST be the same ratio or you will cause serious damage once 4WD is engaged!
ok thank you for that information that really helped a lot lol i was almost gonna get slower gear ratio for the front axel but not no more lol
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Old 10-19-2012, 01:47 AM   #47
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Originally Posted by greenheadkiller98 View Post
I had 4.6 with 3.55 and 33s for 6 months and it totally sucked. It strained so hard to accelerate and was very hard to make it stay in overdrive. Recently swapped to 4.11s and a detroit locker and i absolutely love it. Feels like i have a stock truck again no more sluggishness
How's your mpg now?
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Old 10-19-2012, 10:59 PM   #48
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Its about the same bc i do alot of 55+ and it runs pretty high rpm at that speed above. Might be a little better but probably marginal. May put 35s on next
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Old 10-21-2012, 03:36 AM   #49
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Quote:
Originally Posted by DESERT_RACER
Just my personal experience... I have an 03 4.6L with 305/70/16 on it and 4.10 gears. The 4.10's made a huge difference and am glad I did it. The stock 3.55's were very sluggish and none existent for acceleration so I'm very happy with my set up and the gears have about 8,000 miles on em now
How much does it cost to re-gear a truck
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Old 10-21-2012, 11:25 AM   #50
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It cost me 1000 per axle where i had em done
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