02 7.3 milage - Ford Powerstroke Diesel Forum
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Old 04-04-2013, 07:56 AM
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02 7.3 milage

How much better milage would i get if i switched out my 4.10 gears for 3.73s? I have a dually and i use it to tow lots but i never halfto use the first two gears anyway.
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Old 04-04-2013, 07:10 PM
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I was recently wondering the opposite.
If I traded someone for their 4.10s what the trade off in power vs mpg would be.
So bump for you because I'm curious too.
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Old 04-04-2013, 07:43 PM
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i wish we could do something like that but mines a dually so they say its different
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Old 04-04-2013, 07:53 PM
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Depends on what's going on tire wise. Larger tires do better with lower gears. Stock tires would be great with 3.73.

There shouldn't be a difference in the gears between dwr and swr. Axles and hubs, sure, but not gears.
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Old 04-05-2013, 03:13 AM
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Quote:
Originally Posted by Macon View Post
There shouldn't be a difference in the gears between dwr and swr. Axles and hubs, sure, but not gears.
What?? Most duallys came with 4.10s. I think 3.73s were an option on them. The SRWs came with 3.73s.
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Old 04-05-2013, 06:57 AM
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i did a lot of looking around for gears and i could be wrong but ford told me they werent interchangeable. my axle is a dana 80 but that wasnt good enuf. i had to get the number off the tag in the back. i just have 265s on and that already takes spacers.
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Old 04-05-2013, 07:05 AM
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Quote:
Originally Posted by 7330 Deere View Post
i did a lot of looking around for gears and i could be wrong but ford told me they werent interchangeable. my axle is a dana 80 but that wasnt good enuf. i had to get the number off the tag in the back. i just have 265s on and that already takes spacers.
Didn't even think about it being a larger axle. Let me go beat my head against a wall for a little bit.


Quote:
Originally Posted by Zaairman View Post
What?? Most duallys came with 4.10s. I think 3.73s were an option on them. The SRWs came with 3.73s.
In reference to changing gears. Not the value of the gear set. Deere straightened me up real quick.
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Old 04-05-2013, 01:41 PM
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Google Gearvendor
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Old 04-05-2013, 07:03 PM
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Google Gearvendor
That sher looks like the way to go but im not sher if my pockets are that full. But ill call them anyway.
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Old 04-05-2013, 07:12 PM
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Gear Vendors are pretty awesome. My Grandpa has had one connected to his '65 Dodge, 440, manual for as long as I can recall. The engine has been rebuilt twice, tranny once, in that period, and it's still plugging along. He drives like a grandpa, but we've had enough weight in the bed that the front end has lifted off the ground. I'm not kidding, steering was completed with full lock and brake pressure. His thought process was that if the truck moved, it wasn't too heavy. I can't knock it, as he's made it work for decades. The OD unit has held up all the while.
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