Been dabbling with the idea of re gearing my 2020 for some time and I think I will take the plunge with the holiday sales. Do I really need it? No. I am not really looking to recover my MPGs either as I will be eventually installing a truck camper that will live on the truck that is ~350lbs. I just want my acceleration back haha. Not like I lost much to begin with.
Found several calculators that are very thorough like this one, but even with all the info from the press kit, I am missing some data points. Somewhere else I found a simpler equation where you just take the larger diameter and divide it by the original diameter, then multiply by the stock ratio and this will give you the required gear ratio. I don't know enough to know how accurate this method is, but seems to be good enough.
Now, I may be over complicating this, but when I'm looking to divide by the original diameter, which do I use in my case? I have a PRO4X that comes stock with 31.6" but all other trims have 30.6". I'm thinking of just using the smaller diameter to give me plenty of wigging room. Here's the numbers that came up for both...
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Also should mention that I am very likely going with Yukon's offerings at Alldogs. Going from 30.6" to 32.8" gives me 3.96 which points me to the 4.11 option. That little extra should be plenty for when I get that extra weight, or if I ever decide to go with a true 33" tire (number there ends up at 3.99). I just better plan to never get 35s because my effective ratio from 30.6" would be 4.22. If I ever decide to go up to 34s. however, then I'm looking at 4.10 which would still be good with 4.11 gears.
Has anyone here re geared their truck and if so, how low did you go?
I went to a shop that mainly does Jeeps but they know what there are doing when it comes to re gearing. In fact, what sold me is that the guy was kinda questioning my decision to re gear, instead of saying "hell yes we'll re gear no problem, that'll be $1,200" he broke down some scenarios. He wanted to know my RPMs at cruising speed, which I didn't know at the time but think that's why he was making sure I wanted to go this route as re gearing brings up your RPMs. I gave him a wild guess of 1500 and he said that was really low, so I later tested it on a flat stretch of highway and wasn't totally off. For the record, my RPMs are more or less the following, but consider I already have 285/75R16 on her...
1500RPM @ 60MPH
1750RPM @ 70MPH
2000RPM @ 80MPH
2250RPM @ 90MPH
Found several calculators that are very thorough like this one, but even with all the info from the press kit, I am missing some data points. Somewhere else I found a simpler equation where you just take the larger diameter and divide it by the original diameter, then multiply by the stock ratio and this will give you the required gear ratio. I don't know enough to know how accurate this method is, but seems to be good enough.
Now, I may be over complicating this, but when I'm looking to divide by the original diameter, which do I use in my case? I have a PRO4X that comes stock with 31.6" but all other trims have 30.6". I'm thinking of just using the smaller diameter to give me plenty of wigging room. Here's the numbers that came up for both...
Also should mention that I am very likely going with Yukon's offerings at Alldogs. Going from 30.6" to 32.8" gives me 3.96 which points me to the 4.11 option. That little extra should be plenty for when I get that extra weight, or if I ever decide to go with a true 33" tire (number there ends up at 3.99). I just better plan to never get 35s because my effective ratio from 30.6" would be 4.22. If I ever decide to go up to 34s. however, then I'm looking at 4.10 which would still be good with 4.11 gears.
Has anyone here re geared their truck and if so, how low did you go?
I went to a shop that mainly does Jeeps but they know what there are doing when it comes to re gearing. In fact, what sold me is that the guy was kinda questioning my decision to re gear, instead of saying "hell yes we'll re gear no problem, that'll be $1,200" he broke down some scenarios. He wanted to know my RPMs at cruising speed, which I didn't know at the time but think that's why he was making sure I wanted to go this route as re gearing brings up your RPMs. I gave him a wild guess of 1500 and he said that was really low, so I later tested it on a flat stretch of highway and wasn't totally off. For the record, my RPMs are more or less the following, but consider I already have 285/75R16 on her...
1500RPM @ 60MPH
1750RPM @ 70MPH
2000RPM @ 80MPH
2250RPM @ 90MPH
