Help from TDR members with gear ratios 3:73/ 4:10??

[WhiteSheep]

HeloMech74: I recommend the 4. 10s. I live in Arizona where it is hot and the mountains are steep. I have made it a practice of getting the lowest rear gears I can find whenever I purchase a new truck. Adding bigger tires is an even better reason for low gears. Take a look at BFGs web site. You can calculate the change in effective gearing from changing tire sizes. 4. 10s with 35s will not be much different than 31s with 3. 73s if memory serves.

 

[HeloMech74]

Thanks for the response to my question. I have made the change on my order to reflect the 4. 10 gear ratios. Thanks again.

 

[ENafziger]

Just my 2 cents worth... I was contemplating the gear ratio option too when I ordered my '06. I really wanted the 4. 10's as I was planning on running the 35" toyos as well. However, since I ordered my truck so early, the 4. 10 option wasn't yet available, so I got stuck with the 3. 73's... and I'm glad I did! I'm running 35" toyos now, and really like the more fuel-efficient rpms on the interstate... . so much so, that I would really like the 3. 73 gear ratio and 37" tire combo. When rpm goes about 2,000, fuel mileage really goes down quick. The power loss associated with higher gear ratios can be more than compensated for with a few performance upgrades. The TST/EZ stack is working great for me, and I have way more power and better fuel economy with the stock tires and no mods. I've not had any clutch problems, or fueling upgrades, and have run the 2 chips on nearly every possible combination of settings. Just my opinion...

 

[steved]

Just my 2 cents worth... I was contemplating the gear ratio option too when I ordered my '06. I really wanted the 4. 10's as I was planning on running the 35" toyos as well. However, since I ordered my truck so early, the 4. 10 option wasn't yet available, so I got stuck with the 3. 73's... and I'm glad I did! I'm running 35" toyos now, and really like the more fuel-efficient rpms on the interstate... . so much so, that I would really like the 3. 73 gear ratio and 37" tire combo. When rpm goes about 2,000, fuel mileage really goes down quick. The power loss associated with higher gear ratios can be more than compensated for with a few performance upgrades. The TST/EZ stack is working great for me, and I have way more power and better fuel economy with the stock tires and no mods. I've not had any clutch problems, or fueling upgrades, and have run the 2 chips on nearly every possible combination of settings. Just my opinion...

The G56 and 3. 73 will be equal to an auto (or older NV5600) with 4. 10s... This fact has been beaten to death...



steved

 

[PGreenleaf]

Right on steved

 

[DWest]

2006 with 4.10's

Dealer gave me an 06 to test for the weekend with 4. 10's and an auto so I put 300 miles on all empty but 50 miles pulling an empty flatbed at 2700 pounds. Never going over 60 with some farm miles and city driving it got 17. 1 miles per gallon hand calculated. This was with only 2600 miles on the odometer. I did push it up to 65 once to measure rpms and it was at 2000. My 02 auto with 3. 55 gears is at 1750 at 65. This is a great truck but just can't part with the 02 yet. DW

 

[steved]

I did push it up to 65 once to measure rpms and it was at 2000. My 02 auto with 3. 55 gears is at 1750 at 65. This is a great truck but just can't part with the 02 yet. DW

That must be that little difference in ratio between the manual and auto... I'm turning almost 2300 at 65mph.



steved

 

[cerberusiam]

Just my 2 cents worth... I was contemplating the gear ratio option too when I ordered my '06. I really wanted the 4. 10's as I was planning on running the 35" toyos as well. However, since I ordered my truck so early, the 4. 10 option wasn't yet available, so I got stuck with the 3. 73's... and I'm glad I did! I'm running 35" toyos now, and really like the more fuel-efficient rpms on the interstate... . so much so, that I would really like the 3. 73 gear ratio and 37" tire combo. When rpm goes about 2,000, fuel mileage really goes down quick. The power loss associated with higher gear ratios can be more than compensated for with a few performance upgrades. The TST/EZ stack is working great for me, and I have way more power and better fuel economy with the stock tires and no mods. I've not had any clutch problems, or fueling upgrades, and have run the 2 chips on nearly every possible combination of settings. Just my opinion...

All you say is true but you may be asking for clutch warranty problems down the road. Neither the DMF nor the auto like 35" tire with the 3. 73 ratio. It's pretty easy to tear up both in less than 20k and while the dealer may replace the clutch/trans once its a pretty good bet it won't happen a second time. Hope your dealer is reasonable to deal with.

 

[DMork]

Does anyone know how to take an 06 with 3. 73 down to a 3. 50 or 3. 55? I have an 06 Manual with the 3. 73 and it is awful running down the highway. Pulls like a tractor, however.



06 RAM 2500 MegaCAB 3. 73 CTD.

 

[Cummins Cowboy]

If anyone could elaborate, Which gear ratio would be better to get? I am having a truck built, and I opted for the 3. 73 with the Limited slip axle option. What would be the advatage or disadvantage of having the 4. 10 instead? I am planning on installing some 35x12. 5 toyos on the truck, a day or 2 after delivery if that makes a difference. Any help would be much appreciated. Thanks

In most cases there would be no advantage of the 4:10's I don't care what anyone on this site tells you, I pull a trailer everyday in the mountains of utah, my old nv5600 3. 55 combo in my old '02 would pull any hill, if it was a long steep grade, I believe this is what 5th gear is made for, hello people its called downshiffting, otherwise why have a 6 speed, If you want a 6 speed with 35" tires the g56 3:73 combo is perfect gearing for this, If you want an auto getting the 4:10 with the plan of putting on big tires is the only reason I ever see for opting for the 4:10

 

[kshimizu]

I went with the 4. 10 in my new auto. Reason being it has a higher tow rating than an auto with 3. 73 rearend. I've heard of DOT now pulling over horse trailers and pulling out their scales. Some of the big living quarters we sell weigh over 13,000 pounds empty. Other thing to think about is that it cruises at the same (or lower?) RPM than that manual with 3. 73. The 4. 10 feels like it moves quicker than every stock auto I drove with 3. 73 gears. I had the NV5600 in my 02 and it worked great. I kinda miss shifting and plan on finding a used 12V to tinker with in the future.

 

[Bertram65]

In most cases there would be no advantage of the 4:10's I don't care what anyone on this site tells you, I pull a trailer everyday in the mountains of utah, my old nv5600 3. 55 combo in my old '02 would pull any hill, if it was a long steep grade, I believe this is what 5th gear is made for, hello people its called downshiffting, otherwise why have a 6 speed, If you want a 6 speed with 35" tires the g56 3:73 combo is perfect gearing for this, If you want an auto getting the 4:10 with the plan of putting on big tires is the only reason I ever see for opting for the 4:10

I have 4. 10s and stock tires, I find I need to stay above 2000 rpm to stay in the power to pull hills, if I had any less gear or larger tires I would have to run at speeds I would not be comfortable at towing 10K with my family with me on the highways in northeast.

With the auto and 4. 10s the engine runs cooler and it is better for trans to run at higher RPMs, this difference in mileage is negligable.

 

[CRiggan]

My 05 is an off road, I never checked to see what the gear ration was when i purchased the truck, I just thought it was a 3. 73. But to my surprise, I ran the vin number at the dealership one day and found out it was a 4. 10 anti spin diff.

 

[GHarman]

Axle Ratio should be on a tag attached to the Differential cover. GregH

 

[rwerner]

I have an 06 mega and I have the anti-spin but I think the truck has the 373,s that I am going to change out

 

[WUnderwood]

I have a set of 4. 10s in the classifieds if anyone is interested