Yes you can install lower gears in the front dana 30 axle, and of course you need to have the rear match. Moreover, can you put 4.88 gears in a Dana 30?
They'll fit fine in your existing carriers. We ran that set up for 2 years until we went with a SUper 35 kit with a detroit locker.
Also Know, are 4.10 gears good for 35s? I've got 4.10s with 35s, with the 4.0 and ax15. I can get up to about 80 on the highway, and can hold 70 just fine. I'll be going to deeper gears sometime though, but for a DD, 4.10s are alright.
Secondly, what gear ratio is a Dana 30?
| Ring and Pinion Gear Sets – For use with Dana® Axles |
| Ring & Pinion Gears for use with Dana 30™ & M186 | Sierra Gear & Axle Part # |
| Dana 30™ 4.88 Ratio R&P | SG D30-488 |
| Dana 30™ 3.73 Ratio R&P Reverse | SG D30-373R |
| Dana 30™ 4.10 Ratio R&P Reverse | SG D30-411R |
Can a Dana 30 Handle 33 inch tires?
Registered. The 30 is fine up to 35" tires without a locker before upgrades are normally needed. 33's are as far as I would push the Dana 35. If you do more than easy-medium trails I would really look at upgrading.
Related Question Answers
Is a Dana 30 strong?
The dana 30 fronts are a pretty stout axle for what they are. I run mine with a stroker, 4.88 gears, 35" tires and a full locker and have had almost zero problems with it. Mine is a high pinion 30 (out of a XJ) so it has reverse rotation gears so it is a little stronger then a standard wrangler dana 30. Can a Dana 30 handle 35s?
Registered. You can live with 3.21's and 35's on a D30 for sure. It really isn't the end of the world that some make it out to be. And unless you plan on bouncing hard on rocks, you will be fine. What gear ratio is best for 35 in tires?
Depending on the axle, the next lowest ratio from a 4.10:1 is most likely the 4.56:1, which should be selected for towing and performance. Because of the extra weight associated with off-road tires, we usually recommend going with a performance-minded gear ratio for any tire size above 35 inches. What does Dana 30 mean?
Dana 30: This axle size is the most common, and you'll only find it on the front of Jeep. They have a ring gear diameter of 7 and 1/8 inches. The Dana 30 gear ratios are either 3.21 or 3.73. The width of the axle shafts is 1.13 inches. What gear ratio is a Dana 44?
3.45 Ratio
How much does Regearing cost?
Labor will always vary by region and shop, but you expect a ring and pinion gear installed to be approximately $500-$700 per axle. The being said, a complete regear job is several thousand dollars, done properly. How do I know what gear ratio I have?
Rotate the marked tire one revolution while counting how many times the driveshaft rotates. Let's say your driveshaft made 3 3/4 revolutions, that would determine a 3.73 gear ratio. If you get approximately 2 3/4 revolutions, you have a 2.76 gear ratio. How many spline is a Dana 30?
27 splines
How do I identify my Dana Axle?
Numbers. The Bill of Material (BOM) number is used to identify Dana differentials. The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Do I need to Regear for 35s?
No, you don't need to re-gear with 35s. However, definitely plan on a re-gear in the future and fall in love with your Jeep all over again. She loses pep with bigger meats without the regear - especially with the heavier 35" tires. Can a Dana 30 handle a v8?
The stock Dana 30 (same shaft size as a Dana 44) should hold up just fine up to a 35” tire. If you upgrade your Dana 35 to a super 35 (beefier 30-spline axles shafts), it would handle the V8 power just fine too. Common misconception about the Dana 35 is that the c-clips are the weak point, which isn't true. Can a Dana 35 handle 33s?
A Dana 35 normally holds up ok to 33's providing there's no locker and you take it easy on it. Just don't get into a situation where you get the rear-end bouncing trying to get up/over something. How big of a tire can a Dana 44 handle?
36-inch
What did Dana 44 axles come in?
The Dana 44 has seen use in Chevrolet Corvettes and Dodge Vipers. This axle is referred to as a Dana 44 ICA or Dana 44 IRS. All 1980–1982 Chevrolet Corvette C3 and manual transmission equipped 1985–1996 Chevrolet Corvette C4 had this axle. A rear transaxle was used starting with the Corvette C5. 
