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Convince Me on 4:30 Gears (6.2 Gasser)

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Convince Me on 4:30 Gears (6.2 Gasser)

  #1  
Old 09-27-2018, 11:19 AM
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Convince Me on 4:30 Gears (6.2 Gasser)

I read a lot of enthusiasm on the 4:30 gears. Let me start with I rarely tow. How much better do the 4:30 gears perform in day to day driving? Highway? I do monitor my MPGs. (Yeah, I know we don't buy these trucks for MPGs but still like getting as best of MPGs as reasonable.) Please share real life experiences...not just opinions.

Thanks.
 
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Old 09-27-2018, 11:23 AM
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The 3.73 are very anemic and hold back the 6.2 in day to day driving. In town mileage is better with the 4.30 and if you are getting a F350 then for sure get the 4.30.
 
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Old 09-27-2018, 11:32 AM
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I have the 3.73 gears and the stock 18 inch wheels/tires. I find it's a great combination as I use the truck as a daily driver and also tow 10% of the time, but towing is about 65% of the total mileage. It all comes down to the final drive ratio from the engine to the pavement. If I was to get a SD with the larger 20" diameter wheels, or huge aftermarket tires, I probably would have got the 4.3 gears.
 
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Old 09-27-2018, 11:35 AM
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There`s a good thread in the 6.2l forum. Title has something about vote. Active now...
 
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Old 09-27-2018, 11:42 AM
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I pull a 11,000 pound 5er in 6th gear (mostly) with my 4.30s. These gears help get the 6.2 into the torque band when towing. 9.0 MPG towing.

Daily driving in rural area. Lots of cold starts and around a small town with stops. 15.5 MPG.

Highway driving at 65 mph; 17 MPG. Upper 15's at 70 mph.

IMO, there is no downside to the 4.30s. Noise is also not a factor.
 
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Old 09-27-2018, 11:43 AM
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  • Would be F250 (6R100)
  • Would have the 20" wheel
  • Will look for that thread.
 
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Old 09-27-2018, 11:45 AM
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Originally Posted by acadianbob View Post
I pull a 11,000 pound 5er in 6th gear (mostly) with my 4.30s. These gears help get the 6.2 into the torque band when towing. 9.0 MPG towing.

Daily driving in rural area. Lots of cold starts and around a small town with stops. 15.5 MPG.

Highway driving at 65 mph; 17 MPG. Upper 15's at 70 mph.

IMO, there is no downside to the 4.30s. Noise is also not a factor.
Boy, these are all very encouraging. Noise? (oil burner noise?)
 
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Old 09-27-2018, 11:49 AM
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I did a ton of research on this as well and ended up ordering a 350 with 4.30s last week. I hear its a whole different animal..
 
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Old 09-27-2018, 12:30 PM
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I was able to test drive both before placing an order and the 4.30 gears felt better suited for the truck. More responsive around town and no real penalty on the highway. Based on that I ordered mine with 4.30s.

I haven't put enough miles on to get through the break-in, so I don't think any MPG results will be accurate yet. But I will say that a 200 mile highway trip at 75-80 mph was comfortable and engine noise was non-existent. For my usual driving on 55-65 mph 2 lane roads, 6th gear is perfect.
 
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Old 09-27-2018, 01:00 PM
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The steeper the gear, the better.

See if you can drive a 3.73 and a 4.30 truck to compare. They'll speak for themselves.
 
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Old 09-27-2018, 01:01 PM
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I've had two 4.30 gas trucks. It's the only way to go. There is no fuel penalty and if you go from a 4.30 truck to a 3.73 you notice it right away.
The 3.73 truck feels flat in comparison.
 
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Old 09-27-2018, 01:25 PM
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Listen to Ricohman ⬆️

A gas engine does not have any torque from 1500-2500rpm where you need power pulling & accelerating : UNLESS it’s the AWESOME little 3.5L Twin Turbo Eco-Boost !!!

i hate a truck downshifting all the time, but I’m used to a Diesel lol

4.30 all the way for me
 
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Old 09-27-2018, 03:22 PM
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If you mainly do non-highway driving, drive in hilly areas a lot, carry 2k+ lbs all the time, tow (7k+) occasionally, ever tow 10K+, like brisker acceleration, want to make sure you can get the most capability out of your truck, think you may want larger tires, than go 4.3.

If you really have no reason to need a 3/4 ton or more pickup, and don't do most of the above the 3.73 are good to.

I am in the later group. I bought a truck off the lot and it has 3.73, if it had 4.30 I still would have bought it. I don't think the mileage is that much different, unless you are empty and doing a lot of highway driving, then it might be measurable. I can't say the 3.73 feel slow, but there are times when it feels like it would like a little lower gearing, but just going down a gear fixes that. Off the line in first and second I would think you would be able to notice the gearing difference more often.

If you're ordering the only reasons I would say to not get 4.30's would be if you do a lot of highway driving lightly loaded and will never need the extra towing capability the 4.30's allow. I don't think the 4.30's add anything to the payload but they do allow for ~3k lbs more towing ability.

I am also assuming you are no looking at a regular cab, 2wd, XL. And if you don't mind a slightly stiffer ride and paying a little more get a F350. If you need the payload capacity of a gas F350 get the 4.30's.

I have had maybe 2k lbs in mine and could barely tell a difference, in accelerating or braking. It did ride better and felt more planted to the road.
 
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Old 09-27-2018, 04:08 PM
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Im leveled on 37s and have ordered 4.88 gears. Even then, I don't think I'll see much fuel penalty unless I'm over 70mph. My stock gears are 3.73, and with the bigger tires, its a dog. I wouldn't go less than 4.30. Besides, the 6.2 makes most of its power in the upper RPMs, so might as well be in the power more often, especially in city driving conditions. If you look up a gearing chart, you'll see the RPMs don't climb a whole lot when going with lower gears.
 
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Old 09-27-2018, 05:19 PM
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Originally Posted by ArcticCircle View Post
Im leveled on 37s and have ordered 4.88 gears. Even then, I don't think I'll see much fuel penalty unless I'm over 70mph. My stock gears are 3.73, and with the bigger tires, its a dog. I wouldn't go less than 4.30. Besides, the 6.2 makes most of its power in the upper RPMs, so might as well be in the power more often, especially in city driving conditions. If you look up a gearing chart, you'll see the RPMs don't climb a whole lot when going with lower gears.
Nice, got some stones and get aggressive. 4.88's should be great.
 

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