Lifted 01 Ram Sluggish When Towing
#11
10-03-2013, 05:20 PM
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Thanks Marc,
As an old fart I get something right every now and then.
My only other choice for gears would be 5.38, they are an even lower gear ratio. Either will give you some much needed boost power & torque. You can move 150,000lbs with the proper gearing so you just need to regear those axles.
As an old fart I get something right every now and then.
My only other choice for gears would be 5.38, they are an even lower gear ratio. Either will give you some much needed boost power & torque. You can move 150,000lbs with the proper gearing so you just need to regear those axles.
#13
10-03-2013, 08:46 PM
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#14
10-03-2013, 09:15 PM
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Wow really 5.13's for a 37" tire.... I never would have thought to go that low. I've heard most people are going with the 4.56 and if you want to go a little more extreme go with the 4.88's. I just got a good deal on some 35" tires so I plan on towing with those and the 37's as my daily driver, would the 5.13 gears run OK with the 35's?
#15
10-03-2013, 09:32 PM
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Let me know a price
#16
10-03-2013, 10:19 PM
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Wow really 5.13's for a 37" tire.... I never would have thought to go that low. I've heard most people are going with the 4.56 and if you want to go a little more extreme go with the 4.88's. I just got a good deal on some 35" tires so I plan on towing with those and the 37's as my daily driver, would the 5.13 gears run OK with the 35's?
Go back and look at the RPM chart on the first page. With 35" tires & 5.13 gears you're looking at around 3300 rpm in drive. You have to take those numbers and calculate for overdrive (4th).
One thing I want to make sure of is that we are talking D60 or larger here when talking about gears lower than 4.88. The pinion head will get too small and the chance of breakage will go up x3-4 times.
Low pinion is what normally comes in the rear axle. I'll let you know in a few days a price. I'll pm you.
Last edited by Wildman4x4nut; 10-03-2013 at 11:22 PM.
#18
10-05-2013, 01:10 AM
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#19
10-28-2013, 01:35 AM
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As HeyYou said 4.88 gears or even 5.13's with 37" tires. With a 5-6" lift and 37" tires you've added a lot of rolling resistance to your truck. You figure it now sits higher so catches more wind plus a tire that is 12.5 to 15.5" wide it takes a lot more to make that truck roll.
Look at a gear ratio/rpm chart and figure out where you were when stock. Then go to the 37" tires and see what ratio it is going to take to get you back there. If you want added power drop down one gear ratio. The good thing about going to the D60 axles also got you larger brakes for stopping those big tires.
http://www.superlift.com/library/gears.asp
You want a ratio in the black area for good power or if you want great power then pick a ratio in the blue. So with 37" tires as I suggested you want 4.88 or 5.13 gears. I'd do the 5.13's if it was mine.
Look at a gear ratio/rpm chart and figure out where you were when stock. Then go to the 37" tires and see what ratio it is going to take to get you back there. If you want added power drop down one gear ratio. The good thing about going to the D60 axles also got you larger brakes for stopping those big tires.
http://www.superlift.com/library/gears.asp
You want a ratio in the black area for good power or if you want great power then pick a ratio in the blue. So with 37" tires as I suggested you want 4.88 or 5.13 gears. I'd do the 5.13's if it was mine.
so my stock 225/75?R16 3:55 gearing is in the yellow(is this in 3rd gear rpms? w/ over drive off?).
with me going to a 6.5" Fabtech lift and 35x12.50R17 should i go with 4:27 or 4:55???? i was planning on 4:55 but not sure since 4:27 with 35's is same for same.
is yellow torque? in blue HP?
#20
10-28-2013, 08:18 AM
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Yellow is for fuel economy and not a lot of power, blue is stock or normal power & black is increased power/better oomph. On a Dodge you have a choice between 4.11, 4.56 & 4.88 gears. I would go with 4.88 gears if it was mine.
The RPM's shown is in drive or overdrive off depending on how you want to say it. The biggest thing in deciding what gears to use is what your intended use is going to be. If it is just a street truck and you live in the Midwest where it is flat you can get away with the yellow numbers. If you live where there are any hills to climb then you want the blue numbers minimum and if your going to be taking the truck off-road and/or tow with it then you want the black numbers.
The RPM's shown is in drive or overdrive off depending on how you want to say it. The biggest thing in deciding what gears to use is what your intended use is going to be. If it is just a street truck and you live in the Midwest where it is flat you can get away with the yellow numbers. If you live where there are any hills to climb then you want the blue numbers minimum and if your going to be taking the truck off-road and/or tow with it then you want the black numbers.