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Bucket
GenII
2/21/2006
10:39:20
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 Subject: 3.90 4.10 or 4.56
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Message:
I am still in a quandry over gears,my average trip is 3-4 hrs hiway, then 1-2 hrs offroad,no daily drving with this truck at all.I dont want to go blasting down the freeway at 3k rpm in 5th gear but i need some power to push the 32" super swampers,which measure the same height as my buddies 33"BFG Mudders.So i would like some rpm input from someone with 3.90 and 4.10 and 4.56 with a similer setup....my truck is loaded down and heavy and i am going to pull a trailer with about 1500 lbs,and i am looking for opinions on the various gears.
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Catfish Craig
Dodge Dakota
JOIN HERE
2/21/2006
19:42:07
|  RE: 3.90 4.10 or 4.56
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Message:
I was in the similar situation. I couldn’t decide between 4.11 and 4,56. I have an ATrans in a 2002 QC with a 4.7V8. I used the gear calculator on the Accuauotparts web site. The actual rpm from the calculator is within 100rpms. This helped me decide and I went with the 4.56 in anticipation of 35s one day. Now I’m cruising at about 2400rpms at 70mph in OD. Off it screams at 3k. Check it out. Good luck
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Bucket
GenII
2/21/2006
21:17:53
| RE: 3.90 4.10 or 4.56
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Message:
Yeah i saw your post in the performance sect,and also did the calc on the gears and it came out higher on my 5 speed manual,also i will stick with 32s so i am leaning to 410s but not sure yet.i like the idea of cruising at 2100 rpm with the 390s in 5th.
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ID 4x4
GenIII
2/21/2006
23:18:04
| RE: 3.90 4.10 or 4.56
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Message:
For what it's worth, I was in the same quandry, I went with the 4:56, no regrets! My LT285/75/16 MT's are just a shade taller than 32". I will be honest, highway mileage is about the same if I baby it, around town mileage has gone down a bunch, but I can't help from using and feeling these gears, if you know what I mean.
01 cc 4.7 5-speed 4x4, Rancho lift,4:56 LSD, MBRP exhaust, Superchips
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Bucket
GenII
2/22/2006
10:27:52
| RE: 3.90 4.10 or 4.56
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Message:
Oh i hear ya alright but then again i dont do any around town driving its all highway mixed in with a few miles of brutal offroading,so i am leaning to 410 but i dont want to have to do this twice it costs some bucks
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Walt_Felix
Dodge Dakota
JOIN HERE
2/22/2006
15:43:02
| RE: 3.90 4.10 or 4.56
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Message:
Bucket, you may not have the choice of 4.56 gears, I don't recall anyone making 4.56 gears for your front diff. The lowest I've ever seen for the 7.25" was 4.10 unless someone released lower gears recently.
Walt
http://www.Walt-n-Ingrid.Com
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Bucket
GenII
2/23/2006
10:17:56
| RE: 3.90 4.10 or 4.56
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Message:
Well Walt thats good to know although i always thought 4.56 was more or less for an around town vehicle or one with alot bigger tires,but if i go 4.10 which is how im leaning im hoping to stay below 2350 rpm at 70.if i can do that im happy.
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