4x4jeepmanthing

so i have a set of USA standard 4.56 gears that i was planning on having installed. The shop i asked about installation said that this brand in an 8.25 typically howls, and they arent the easiest to install. they recommended g2, randys R&P, or yukon gears.

can i use the USA standard master install kits with a different brand of gears?

is there any truth to this or are they blowing smoke because they dont sell them?

00t444e

Yes you can use the install kit with any brand of gears. Yukon and USA Standard gears are made by the same company and sold by Randy's R&P although USA standard is cheaper I am not sure what the difference is. If set up properly there shouldn't be any howling issues. I haven't heard much about G2 gears, Richmond Gear is another brand you might want to look into. Honestly I think that the USA Standards will be fine.

4x4jeepmanthing

Man I hope so, it should be fine

peligro113

USA Standard gears are made by Yukon - same materials, process, plant, drawings, etc. When the Yukon gears are brought in house, they go through quality control. If the contact portion of the ring and pinion don't meet tolerances for a quiet gear (too rough), then the gear is downgraded to USA Standard rather than tossing it in the trash. It's still a great gear strength wise and etc, but in some instances they can be noisy.

4x4jeepmanthing

Does this ever wear down and get quieter if it is noisey?
Is there damage to gears that are noisey,that were set up properly?
How noisey is this usually, can it be heard over tires/exhaust?

investinwaffles

IF the gears are not setup properly, generally, yes - you will be able to hear a "roar" at higher speeds unless you have the windows down or are blasting the radio (IMO). I honestly don't have experience with any gears other than Motive and G2, my mustang got Motives and they were pretty quiet (4.10), my Jeep definately has more noise than the 260K mile old factory one with 4.88's but I think that is also inherent with a huge gear ratio. They have also gotten quieter over the 2500 miles I have had them, as the new pinion bearing and everything wears in. The first gear oil change is really important, will come out really black.
Its not overly loud, but you can notice a sound change if you are really in tune with your rig. Diff temps are pretty indicative of a badly set-up gear-set as well (during the break in, it will get hot, but it should be much less extreme after 500-1000 miles, mine were)

They sound pretty quiet on the highway, no drone or any additional vibration. Rolls really smooth with no resistance from the gears as well, and normal operating temps when I feel the diff cover after a really long drive. I run 80w140 dino in the rear (Chevron Delo) which also helped quiet it down a little, and Delo 75w90 in the front.

I went with G2 which were cheaper than Yukon but still had a LOT of installs in all kinds of Jeeps, USA Standard Gear should be a fine, it's not like they will accept huge defects or anything that is going to cause dissatisfaction with the end customer I hope?

Plus lots of places sell them, hopefully someone with direct experience can chime in here