Author Topic: Yukon R&P? Good? Bad? (Read 3325 times)

Kurlee Daddee · « **on:** Jun 22, 2006, 06:21:48 PM »

What do you guys think of Yukon Gears (R&P's)?Specifically 5:29's. Good? Bad? Any experiences or nightmares with them? Please let me know.

79coyotefrg · « **Reply #1 on:** Jun 22, 2006, 06:24:48 PM »

best there is dude

cheap sunglasses · « **Reply #2 on:** Jun 22, 2006, 07:26:10 PM »

ive heard that over and over again, must mean something huh

DTB · « **Reply #3 on:** Jun 22, 2006, 07:45:02 PM »

are they all treated by bobby long or is that something u pay extra for?

burnyota · « **Reply #4 on:** Jun 22, 2006, 08:03:28 PM »

Quote from: DirToyBoy on Jun 22, 2006, 07:45:02 PM

are they all treated by bobby long or is that something u pay extra for? avent

dont think so but i may be wrong..

haven't had a problem with mine yet

yotaboy79 · « **Reply #5 on:** Jun 22, 2006, 08:21:31 PM »

no not all yukons are treated by bobby long and yukon is the best gear ive ever run and will never buy any thing else

TheBandit · « **Reply #6 on:** Jun 22, 2006, 09:34:47 PM »

I have been running Yukon 5.29s for a little over two years now. No problems at all. I've been DDing mostly, but they've seen some trail use too. I have 7.5" front on stock/open carrier and 8" on a Detroit.

Here are some install pictures. We were able to get a good gear pattern without any fuss.
http://thebandit.xtremefabricator.com/gears/

DTB · « **Reply #7 on:** Jun 22, 2006, 09:36:47 PM »

is the treating process even really necessary then? if no one ever has problems with them?

jimbo74 · « **Reply #8 on:** Jun 22, 2006, 10:26:14 PM »

Quote from: DirToyBoy on Jun 22, 2006, 09:36:47 PM

is the treating process even really necessary then? if no one ever has problems with them?

it is the utmost in strength, however, i have heard for some reason that you arent supposed to run cryoed gears on a street driven truck..... although i have no idea why......

cheap sunglasses · « **Reply #9 on:** Jun 23, 2006, 12:35:52 AM »

i think its because they wont wear properly. actually i have no idea i seem to remember reading that they wear better than normal. i dont know! move along

Kurlee Daddee · « **Reply #10 on:** Jun 23, 2006, 05:53:31 AM »

Thanks guys. It seems the majority of you like them. I am planning on stepping up to 35's and 5:29's. My truck isn't daily driven. It is only driven on the street once in a while.

I think you guys have helped me with my decision.

DTB · « **Reply #11 on:** Jun 25, 2006, 03:42:47 PM »

Quote from: Captain4x2 on Jun 22, 2006, 10:26:14 PM

it is the utmost in strength, however, i have heard for some reason that you arent supposed to run cryoed gears on a street driven truck..... although i have no idea why......

Quote from: cheap sunglasses on Jun 23, 2006, 12:35:52 AM

i think its because they wont wear properly. actually i have no idea i seem to remember reading that they wear better than normal. i dont know! move along

anyone? anyone?

johnnygalt · « **Reply #12 on:** Jun 25, 2006, 08:04:06 PM »

Yukon is Randy's r&P house brand name. They could be made by a number of different gear cutters, but they do have a good reputation. Precision and Richmond are also supposed to be nice gears.

cheap sunglasses · « **Reply #13 on:** Jul 03, 2006, 07:57:32 AM »

a thread on pirate just answered the heat/cryo wear question..
http://www.pirate4x4.com/forum/showthread.php?t=486341

apparently cryo is always good but you dont want to heat treat the rear if youre gonna be driving at highway sppeds.

Volcom · « **Reply #14 on:** Jul 03, 2006, 08:08:37 AM »

Good info to know about cyro'd gears. I was planning on buying two sets of cryo's but I guess I'll buy 1 set for the front and run regular gears in the rear.

blackdiamond · « **Reply #15 on:** Jul 03, 2006, 11:52:50 AM »

Quote from: Volcom on Jul 03, 2006, 08:08:37 AM

Good info to know about cyro'd gears. I was planning on buying two sets of cryo's but I guess I'll buy 1 set for the front and run regular gears in the rear.

I noted that several people seemed to agree that cryo-treated gears were not good in the rear end of a highway driven rig, but I never saw anyone actually give a reason.

When I picked up my Longfields from Bobby I asked him about the cryo-treated stock birfields. He said that the treatment actually made them softer and less brittle. This allows them to absorb energy rather than simply shattering. I can only assume that cryo-treating the ring & pinion has the same effect. If this is the case, the softer metal probably wears out faster. It is possible that the increase in trail durability isn't a good trade-off for the decrease in lifespan.

I don't know, but this is the only thing I can come up with.

cheap sunglasses · « **Reply #16 on:** Jul 03, 2006, 11:54:23 PM »

The cryo-ing isnt the issue on highway rigs. Its the heat treating. I imagine it has something to do with the gears getting hot from going that fast. Maybe they dont like to be heated up too much after getting baked by Bobby? I still cant think of a reason why.

blackdiamond · « **Reply #17 on:** Jul 04, 2006, 11:06:28 AM »

Quote from: cheap sunglasses on Jul 03, 2006, 11:54:23 PM

The cryo-ing isnt the issue on highway rigs. Its the heat treating. I imagine it has something to do with the gears getting hot from going that fast. Maybe they dont like to be heated up too much after getting baked by Bobby? I still cant think of a reason why.

Isn't part of the break in on a differential include several cycles of heating and cooling that produces a "heat treat" affect? Maybe this process simple reverses the cryo process?

Doc Holiday · « **Reply #18 on:** Jul 05, 2006, 01:08:27 AM »

what if i bought a set of 5.29s put them in my oven for like 5 hours at super hot and let them cool off them put them in the deap freeze for a couple of hours and repeat the process a couple of times!!!
btw i am just joking....

blackdiamond · « **Reply #19 on:** Jul 05, 2006, 12:03:23 PM »

Quote from: Doc Holiday on Jul 05, 2006, 01:08:27 AM

what if i bought a set of 5.29s put them in my oven for like 5 hours at super hot and let them cool off them put them in the deap freeze for a couple of hours and repeat the process a couple of times!!!
btw i am just joking....

not quite the temperature of liquid nitrogen that is used.

jimbo74 · « **Reply #20 on:** Jul 05, 2006, 01:04:30 PM »

Quote from: Doc Holiday on Jul 05, 2006, 01:08:27 AM

what if i bought a set of 5.29s put them in my oven for like 5 hours at super hot and let them cool off them put them in the deap freeze for a couple of hours and repeat the process a couple of times!!!
btw i am just joking....

oh wow, you didnt start your own thread on it! i htink im having a heart attack......

toynizzy · « **Reply #21 on:** Jul 05, 2006, 10:26:20 PM »

yukon gears is all i wil buy,my friends who own a transmission shop only run yukon unless a customer brings their own gears,great product and service on any problems they have,cryo i dunno about,im not that hardcore i guess,need my $$ for more important things right now

Kurlee Daddee [OP]

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