Gear swap a stock G56 truck - Dodge Cummins Diesel Forum
2013-2018 General Discussion General Chit Chat About the 2013 model year differences 6.7L 4th generation Cummins - NO ADVERTISING - Sponsored by: StarLite Diesel

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post #1 of 24 (permalink) Old 12-04-2019, 03:55 PM Thread Starter
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Curious if anyone has swapped the 3.42's out for 3.73's on a completely stock G56 truck? I tow my 9500lbs TT a couple times a year to different places in the state of Oregon for work and was wondering if changing gears would be a better option than looking to add an emissions intact tune. Few times the mountains have seemed to push my power to the limit when having to slow down uphill and get going again because of people cutting me off and playing the "step on the brakes" after flying past you game.

If you have did you like the results or did your RPM's change so much you wish you stayed at 3.42 to keep the flat ground RPM's under 2k? I dont drive too fast when empty. Usually between 65 and 75.

I know if I want better response I could do a pedal commander or something like that but I'm thinking gearing would solve any issue that I have now. A little more get up and go loaded uphill would be nice. Probably feel like I have throttle left to push if I need as well. Any thoughts or experience would be appreciated.

I should note I have a 3500 SRW not a dually.


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post #2 of 24 (permalink) Old 12-04-2019, 06:49 PM
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My 06 had 3.73 from the factory. It got annoying on the interstate empty, the rpm's were crazy high. It did pull hills well though. I pretty much never encountered a hill that caused me to down shift.

2014 2500 Laramie 4x4 CC Long bed black on black, 3.42 gears, 68rfe. Window visors tri-fold bed cover, EFI live CSP4 from HPP Tuning.
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post #3 of 24 (permalink) Old 12-04-2019, 09:40 PM
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Quote:
Originally Posted by jdub454 View Post
Curious if anyone has swapped the 3.42's out for 3.73's on a completely stock G56 truck? I tow my 9500lbs TT a couple times a year to different places in the state of Oregon for work and was wondering if changing gears would be a better option than looking to add an emissions intact tune. Few times the mountains have seemed to push my power to the limit when having to slow down uphill and get going again because of people cutting me off and playing the "step on the brakes" after flying past you game.

If you have did you like the results or did your RPM's change so much you wish you stayed at 3.42 to keep the flat ground RPM's under 2k? I dont drive too fast when empty. Usually between 65 and 75.

I know if I want better response I could do a pedal commander or something like that but I'm thinking gearing would solve any issue that I have now. A little more get up and go loaded uphill would be nice. Probably feel like I have throttle left to push if I need as well. Any thoughts or experience would be appreciated.

I should note I have a 3500 SRW not a dually.
IMHO....... just going to 3.73 will be a waste of time and money for you. Not going to be enough difference to hardly be noticeable. For 9500 lb a couple times a year I would just live with it, and run a gear or two lower in the hills.
As far as the dumbazzes playing the ďbrake pedal two stepĒ.......they are going to do that anyway, and somebody will always be pissed off at the trailer in their way. Let them be pissed. They will be the ones that arrive at their destination all wound up and frazzled!!!!!
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2018 3500 DRW, 2013 Raptor @ 41í long and 18000 GVW.......and too many toys!!
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post #4 of 24 (permalink) Old 12-04-2019, 10:38 PM
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I agree with Don, that small of a jump isnít worth the money.
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post #5 of 24 (permalink) Old 12-05-2019, 12:23 AM
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i would not do the jump for the money. yes you will notice a difference, but is it worth the cost? what size tires are you running? completely stock?

--2015 2500, Crew Cab, Long Bed, 4x4, G56, Maximum Steel
- To Do List, 6" suspension,37" tires,4.56 Gears
--2006 2500 4x4 4 door long bed auto, 8" BDS, 37s
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post #6 of 24 (permalink) Old 12-05-2019, 01:59 AM Thread Starter
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You guys are speaking my language about keeping it how it is. I was thinking the same about if I'm only doing it a few times a year not to waste the money. I've learned to deal with the crazy drivers that do that by giving them plenty of space and always looking for my escape route.

My tires are stock as stock can be. The Firestone HT 275/70R18
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post #7 of 24 (permalink) Old 12-05-2019, 10:19 AM
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Why aren’t you considering 4.10’s. With a G56 that would be pure bliss.

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post #8 of 24 (permalink) Old 12-05-2019, 10:25 AM
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I've had a stock 10 with 3.73s and a stock 16 with 3.42s I will absolutely be swapping to 3.73s

3.73s are so much better imo at everything except running 90+mph on the highway. 3.73s pull harder loaded and drive easier when empty. Even pulling my empty 5k trailer I can tell a massive difference between the 2 trucks. Once I added power to both the difference is more noticeable. The 3.73 truck had way more bottom end pulling power. Yes 3.42s are ok but if you've not driven a G56 with 3.73s you dont know what you're missing.

And guys with autos cant really make the comparison.

Honestly now that 3.73 is standard I'm waiting for someone to want to go back to 3.42s so I can just swap everything with them.

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post #9 of 24 (permalink) Old 12-05-2019, 10:37 AM
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I have the stock G56 3500 and I feel its geared pretty well stock. I tow about 13K +/- and generally I can pull most minor grades in 6th..I downshift to 5th anytime I need more then 3/4 throttle. Im not in areas where I get cut off etc much though and have to regain speed. 3:73 might be acceptable, But jumping to 4:10's I would think 1st would be almost unusuable. I agree with others going from 3:42 to 3:73 is not much of a difference, but I trust MIB above opinion since he has dealt with both. After coming from a Hemi 6.4 and screaming at 5K rpms in second gear on a hill on the interstate with about 10K, this truck is pure bliss.

2018 3500 cc lb 4x4 g56
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post #10 of 24 (permalink) Old 12-05-2019, 10:53 AM
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post #11 of 24 (permalink) Old 12-05-2019, 11:05 AM
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Coming from a 6.4l I could see how even the dr rated g56 would be more than enough. And it really is sufficient. Even with 3.42s it does everything I've asked it do without complaining. But having had a 3.73 truck for so long I know where the 3.42s lack. Mostly starting on an incline or actual steep hill loaded. 3.42s do it fine but it takes either some throttle or to much slippage. 3.73s would no joke no throttle any hill loaded to 20k with minimal slip to get rolling. The difference is very noticeable when you drive them both back to back.

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post #12 of 24 (permalink) Old 12-05-2019, 11:19 AM
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4.10’s with a stick wouldn’t be enjoyable? I figured you could manage rpms better.

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