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Discussion Starter #1
After reading numerous threads on here, I need an opinion. I have a 95 EB with a 5.0, 3.55, 6" Superlift on 35's, with E40D. I do most of my driving on the highway. Not sure if I should go 4:11 or 4:56 or is there an in between?
What are you guys running?
Bud
 

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4.56 maybe even 4.88's.
 

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MARBLE GARGLER!
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AU is right, It depends how comfortable you want to be in the worst offroad situation, And how comfortable you want to feel at the mall/gas station.... Now tell us how big your auxillary Transmission cooler is that protects the expensive E40D you have-
 

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I strongly urge you to search around and find a gear chart and find the formula for figuring out your rpms at said speed with certain gears and use that with some serious thought about your driving style, usual speed, and overall plans for the truck to figure out what gear ratio you need. The problem with asking people on a forum like this is, there driving styles, usual speeds, and overall plan for their truck is probably completely different than yours. Since you say that your normally driving highway than you would probably want to stay with a little bit taller gear, but you need to look at what speed you drive with what rpm you and your motor are comfortable with. The usual for 35's tends to be a 4.56, but you may find you want a 4.88 or some other gear ratio. Use your brain and be realistic with your needs and wants and you'll find what will work the best for you.
 

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I have 4.56 gears with my 33's and I couldn't be happier. The power is perfect for normal driving and when I take it the trails it feels even better. If I had 35's with the 302 I would go 4.88's no question's asked. You gotta remember that little 302 in a big package likes to spin high rpms. Mine turns right at 2500 rpm doing an actual 70 mph. At that speed and rpm I am just getting into the 302's power band and have the ability to easily pass people without jumping out of gear.

You have to think you are not only turning a taller tire but pulling the extra wieght. When I went from my bald 32 BFG's to the 33 MTR's with the 4.56 gears I could tell a HUGE difference.
 

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Discussion Starter #8
I have a 13,000 pound external cooler on it. Keep the fluids clean.

As for the gearing... I drive like a grandpa. I do not hot rod the truck, I save that for the Harley. I want to be around 2200-2300 at 70. I am at 1600 to 1700 at true 65mph now. The truck is working to stay there.
Is my goal good? 2200-2300, or is that too low?
Thanks guys?
 

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OK I have a 351 to your 302 but on the F250 when I went from 3.55 to 4.56 with BFG MT 35x12.5s the difference was huge at stop and go, made the truck run great but I hate higher RPMs and I was doing
granted this was without resetting my PSOM so I was going slightly faster then on here but those RPMS to me are slightly high. before the swap it was 70mphs and 1900-2000 rpms. If mostly highway I say 4.11s...
 

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There is nothing wrong with an engine running in higher rpms. a 351 doesn't exactly like higher rpms. However like I said my 302 loves the higher rpms. It actually runs smoother there.

Bud I promise you if you go with 4.11 you will be so upset. You will be redoing gears soon. 4.56 gears would put you right about stock with 35's. So at 70 you should be turning around 2100 rpms. With 4.88's you will most likely turning 2500 or 2600 rpms.
 

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I have the 351, with I wanna say 373 gears right now, if not 355s. I am gonna go to 410 gears for my 35s. I like the lower rpms, especially for how much I actually drive the truck.

I need to put a bigger tranny cooler on it tho, I have had problems with the tranny getting hot and blowing the FMS. grrr
 

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Driving Stuff Henry Built
-90 xlt, 351w, e4od, man 1356, 3.55, sag, warn hubs, 35s. -73, 400, np435, d20j twin, 35s
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I have a 13,000 pound external cooler on it. Keep the fluids clean.

As for the gearing... I drive like a grandpa. I do not hot rod the truck, I save that for the Harley. I want to be around 2200-2300 at 70. I am at 1600 to 1700 at true 65mph now. The truck is working to stay there.
Is my goal good? 2200-2300, or is that too low?
Thanks guys?
This my favorite Gear Ratio Calculator. It allows you to compare 2 setups side by side. I entered yours as an e4od, bw1356 t-case, with 35" tires.
It showed:
3.55:1 at 1573 rpm in high gear at 65 mph.
3.55:1 at 1694 rpm in high gear at 70 mph.
4.56:1 at 2020 rpm in high gear at 65 mph.
4.56:1 at 2176 rpm in high gear at 70 mph.
4.88:1 at 2162 rpm in high gear at 65 mph.
4.88:1 at 2328 rpm in high gear at 70 mph.

If you were to turn off your overdrive with your current setup, you'd be at 2215 rpm at 65 mph. That looks pretty close to the 4.88s in high gear. How does it feel at that speed in 3rd gear now?
 

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Discussion Starter #13
Is that kinda high? Almost 2200 at 70 with 4:56. Would 4:10 be better at 200 rpm?
 

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Would 4.10 be probably the best combination between decent power to get things moving and low enough RPMs to not blow the gas out the exhaust when your driving down the highway at 60+mph?

I only ask because when I ordered my Dodge Ram, I got it with the 4.10LSD instead of the standard 3.73 or whatever it came with at the time. I was convinced by alot of people in the know that it was the best overall to get my 7000lb truck moving and not kill me on the economy since I hardly see dirt. Alot of guys go with the 4.56 only because they do alot of off road driving and for them the economy isn't an issue and that's what the PowerWagons come with.
 

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After reading numerous threads on here, I need an opinion. I have a 95 EB with a 5.0, 3.55, 6" Superlift on 35's, with E40D. I do most of my driving on the highway. Not sure if I should go 4:11 or 4:56 or is there an in between?
What are you guys running?
Bud
Good "rule of thumb" calculation is to mutiply .12 by your tire diameter. (.12 X 38" = 4.56) This is for maintaining a close to stock ride setup ....I just said the same thing to another guy on here asking the same question....check out this site

http://www.4lo.com/calc/geartable.htm
 
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