The Smart Way to Regear Your RAM for Bigger Tires
Big Tires, Big Problems (If You Skip the Gears)
If you’ve thrown 35s, 37s — or even bigger tires — on your RAM 1500, 2500, or 3500, you know the feeling: your truck looks killer, but suddenly it drives like it’s pulling an anchor.
Sluggish acceleration, constant downshifting, worse gas mileage — sound familiar? That’s because your stock differential gear ratio can’t keep up with the new tire size.
At Axleboy Offroad, we help RAM owners get that lost power back, the right way: precision differential re-gearing.
Why Bigger Tires Kill Performance:
Your RAM’s axles house
differentials — gear sets that translate driveshaft power out to your wheels. Bigger tires change your final drive ratio. It’s like pedaling a bike in the wrong gear: you’re working way harder to go the same speed.
When your factory differential gears are too “tall” for the new tire size, your engine strains more, your transmission hunts for gears, and towing feels gutless.
Common signs your gearing is too tall:
- Sluggish take-off
- Downshifts on mild hills
- Poor towing torque
- Dropped 2–4 mpg
- Transmission runs hotter, shortening its life
How to Pick the Right Gear Ratio
The perfect gear ratio depends on:
- Your tire size
- Your engine (Hemi, Cummins, etc.)
- How you drive (daily, highway, towing, off-road)
Example:
If your RAM came with 3.55 gears and you upgraded from stock 32s to 37s — you might now be better off with 4.10s or 4.56s to bring your RPMs back in line.
Too high = weak torque.
Too low = screaming RPMs.
Just right = power AND MPG balanced.
Remember: We’re talking about the
ring and pinion gears inside your front and rear differentials — not your transmission. Getting this ratio right makes your truck feel like it should again.
Why DIY Math Doesn’t Cut It
Online calculators are good guidelines. But we’ve seen plenty of RAM owners regret a regear because they picked the wrong ratio — too conservative or too aggressive.
At Axleboy, we calculate based on:
- True tire measurements (mounted size, not just the number on the sidewall)
- Your actual daily driving vs. towing vs. trails
- Engine torque curves
- RPM sweet spots for your transmission
It’s not just a number — it’s about restoring performance where it matters.
How We Regear RAM Trucks
How We Regear RAM Trucks
1️⃣ Full Consultation
We chat about how you use your truck and where you feel it’s underpowered.
2️⃣ Ratio Match
We run the numbers — no guesswork. You’ll see recommended gear ratios for your differentials, and what each one means for power, towing, and fuel economy.
3️⃣ Quality Parts
We use trusted differential gear sets from Yukon, Revolution, or OEM-matched brands. Cheap gears lead to noise and premature wear.
4️⃣ Professional Install
Regearing is precision work: backlash, preload, and gear pattern checks — all dialed in to factory specs. We service both front and rear axles.
5️⃣ Break-In & Road Test
We ensure your new gears run quiet and smooth, and advise on proper break-in to protect your investment.
Benefits of a Proper Regear
- Stronger launch off the line
- Better towing power
- Less strain on transmission
- Restored fuel economy (or at least prevent massive loss)
- Bring back the fun you lost with big tires!
Why RAM Owners Choose Axleboy
✔️ We’ve re-geared hundreds of RAMs — no rookie mistakes
✔️ Real consultation, not guesswork
✔️ Quality differential parts, proven install methods
✔️ Local St. Louis shop, honest advice
Stop Driving a Dog — Regain Your Power
Big tires shouldn’t mean big headaches. Let’s match your RAM’s differential gears to your setup so you can haul, tow, and enjoy the drive again.
Request a RAM Truck Consultation at Axleboy Offroad >
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