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Old Aug 8, 2008 | 03:40 PM
  #1  
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Rear Gear Advice

From previous research, it seems that my truck is equipped with a 4.10 (or is it 4.11) rear end. I have a 5 spd manual tranny. I don't do a lot of towing over 6-7k lbs and really for the most part its pretty flat with only slight grades. I would like to keep my rpms at 2k (or lower??)doing 70mph....currently I am hitting about 2300 doing barely over 60. Is there a different gear that I can have installed that would accomplish this or am I over thinking it. I feel like 3k rpms is to high to be cruising for hundreds of miles, plus it would kill my mileage.

What do gear sets cost and what would an average install cost be?

Thanks for any advice.
 
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Old Aug 8, 2008 | 03:51 PM
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Here is a thread that similar that should answer some of your questions
 
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Old Aug 8, 2008 | 04:23 PM
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From: Whitewright, Tx
Originally Posted by tjbeggs
Here is a thread that similar that should answer some of your questions
TJ, no link.
 
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Old Aug 8, 2008 | 04:23 PM
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Just asked all about that..https://www.ford-trucks.com/forums/7...n-my-rear.html
 
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Old Aug 8, 2008 | 04:34 PM
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if you really want ot change gears then to get what you want you need a minum of 3.55's. they are the cheapest and most readily available for your axles

ring and pinion- roughly 200 bucks per axle.
bearing/install kit- about 100 bucks per axle.

price for a shop to do it all? my estimate would say with a labor rate of 55 bucks an hour most shops will charge you 4-5 hours for an axle overhaul.
if you have a dana 50 up front it will be alot more than a dana 60 but the front axle will still be more along the lines of 7-8 hours. so you are looking at a rough estimate of 700 bucks in labor
 
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Old Aug 9, 2008 | 02:54 PM
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Better yet try to find someone that wants to swap for your 4.10 stuff.

Vince
 
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Old Aug 9, 2008 | 10:04 PM
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4.10's suck. i recommend 3.55's in any diesel ford. i have a complete rear end with 3.55's in perfect working order open diff. i will sell u or gears only if you wish to go that way. pm me if your interested well talk numbers. i have i think 10 or more rear ends and i need to get rid of them all. if anyone else wants a rear end for a ford, ill talk. i have 3.55 and 4.10's for sell. and a 1/2 ton ford and a dually dodge rear end. and i have a 84 model 3/4 ton rear with 3.07's but im saving that one for my 1/2 ton ford-5.9 cummins
 
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Old Aug 9, 2008 | 10:06 PM
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your truck with 3.55's will run 2150 at 70. dont let anyone tell u differently
 
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Old Aug 9, 2008 | 11:01 PM
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Originally Posted by MLCinNCTX
TJ, no link.
I always do that!! Scatgo got me covered though!

Originally Posted by scatgo
 
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Old Aug 11, 2008 | 07:59 AM
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Originally Posted by 89ford73
4.10's suck. i recommend 3.55's in any diesel ford. i have a complete rear end with 3.55's in perfect working order open diff. i will sell u or gears only if you wish to go that way. pm me if your interested well talk numbers. i have i think 10 or more rear ends and i need to get rid of them all. if anyone else wants a rear end for a ford, ill talk. i have 3.55 and 4.10's for sell. and a 1/2 ton ford and a dually dodge rear end. and i have a 84 model 3/4 ton rear with 3.07's but im saving that one for my 1/2 ton ford-5.9 cummins
Where are you located, and do you have a rear end w/ 3.55's that will work on my dually.....I think I forgot to mention that in my OP!
 
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Old Aug 11, 2008 | 08:02 AM
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Since this job will probably be more expensive then I want to spend, I guess my next question is geared towards (no pun intended!!) living with the 4.10's. Is it safe to motor down the highway at 2500-2750 RPM's? It sure sounds loud and strenuous to me, and at that RPM it appears I am also into the boost full time at about 5-7 psi. I know the fuel mileage would suck, but just curious if it is OK or if its harmfull to the motor/turbo?
 
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Old Aug 11, 2008 | 08:24 AM
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You can run 90 mph with a 4.10 rear end and not hurt the engine, it's just loud and gets bad fuel mileage.
 
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Old Aug 11, 2008 | 08:47 AM
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Good to know, but I have no desire to go over 65 or 70 mph with 50g's riding in tow.

I guess I could handle going 60 all the time, but man it just doesn't feel safe with everyone doing 80-85 these days, and even the truckers blowing by
 
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Old Aug 13, 2008 | 09:46 AM
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the gears only will fit from a dually to a srw i can gut an axle or two. gears alone 100 bucks each set.
 
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Old Aug 13, 2008 | 09:47 AM
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ill throw in the carrier and used bearings if you wish
 
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