Reduction gears

[LC4LIFE]

I have the under-drive and 3:1 in the transfer case with 315's. I am very happy with it for my size tire, but if I ever go to 37's I will want a little lower gearing, unless I go the turbo route. I live at altitude and go very high sometimes along with towing so it still becomes a dog at certain times. Also, I know some people have noise from the UD t-case gears, but that is not my case. Mine is super quiet. You can hear them only if you really try and the noise I noted in the beginning is virtually gone. My truck is on KO2's and is very quiet. The gears have never been noticed by any one other than myself. Here is my review after I first installed them. Under-drive plus Low-Range review

 

[RFB]

5.29 nitro set with crush sleeves been fine for 9 years

thats great, happy to hear it. perhaps 9 yrs ago they made them well. NOW they do not and sevral dozen folks on this forum alone have verified that. Fan boying companies because thier parts on are you truck is fine, BUT when they start NOT returning calls or making sh(*ty parts social media keeps them honest. And a truck driven to trails and a DD are very differnet animals. and it still does not change that 5.29s are not as heavy as 4.88s I almost swapped in 5.29s until I saw them side by side. Ill stick with Factory or RCV from now on.

 

[RFB]

Not only did brand new nitro axles twist from a super easy trail like Imogene but the front pinion shattered so that twonfor two

 

[ajax1]

thats great, happy to hear it. perhaps 9 yrs ago they made them well. NOW they do not and sevral dozen folks on this forum alone have verified that. Fan boying companies because thier parts on are you truck is fine, BUT when they start NOT returning calls or making sh(*ty parts social media keeps them honest. And a truck driven to trails and a DD are very differnet animals. and it still does not change that 5.29s are not as heavy as 4.88s I almost swapped in 5.29s until I saw them side by side. Ill stick with Factory or RCV from now on.

Don’t really understand how I’m being fan boy, op asked about gears ,not axle shafts ,and 37s ,answered his question. I’m at altitude so 4.88s wasn’t enough for what I wanted and I enjoy the low range from 5.29s. Don’t know why your being a dick to the guy that offered to bring you parts when ya broke in Moab.

 

[junior80]

The gear whine noise from my sumo underdrive t case gears was noticeable, has gotten quieter, does not bother me now. I’m one of those people that get really annoyed by odd noises like that or things not being straight or lined up properly when they could be, and I’m really happy with the transfer case gears. Other relevant info is 35” nitto trail grapplers however they’re in good condition and don’t make anywhere near the noise a set of BFG km2s did.

 

[matzell]

With all the gear sets out there, what is the current feed back on gear noise? Is one brand quieter than the others? I am leaning towards the Sumo Gears. I would think maybe they wear in a little, two new and one used and the noise gets better?

I am thinking of the under drive gears for the high range in transfercase.

Thanks in advance

 

[RFB]

With all the gear sets out there, what is the current feed back on gear noise? Is one brand quieter than the others? I am leaning towards the Sumo Gears. I would think maybe they wear in a little, two new and one used and the noise gets better?


Thanks in advance

for what its worth, Im running Marlin Crawlers and Its quiet. not noticable at all over 3in exhaust and ,Mud grapplers(just being honest)

 

[matzell]

for what its worth, Im running Marlin Crawlers and Its quiet. not noticable at all over 3in exhaust and ,Mud grapplers(just being honest)

Thanks, I should have mentioned just the under drive gears for high range.