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Author Topic: What's the best diff fluid?  (Read 4303 times)

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RT

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What's the best diff fluid?
« on: February 21, 2011, 11:04:52 PM »
Should I get the good stuff (royal purple, redline, valvoline) or just get the $4 crap at autozone......plus what's the better weight 80-90 or 75/85-140. I'm in New Mexico so temperature's not an issue for lubrication.
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Torch_Ind

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Re: What's the best diff fluid?
« Reply #1 on: February 22, 2011, 07:24:10 AM »
cheep I would pick if your in high heat area.. at the most pick the cheapest synthetic blend
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RT

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Re: What's the best diff fluid?
« Reply #2 on: February 22, 2011, 08:58:39 AM »
Well, I've been having a lot of drivetrain whine.....probably just a jeep thing but idk...the diff fluids grey so I'm going to see if that's it. What would shut it up better, synthetic or mineral?
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Torch_Ind

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Re: What's the best diff fluid?
« Reply #3 on: February 22, 2011, 09:16:03 AM »
Quote from: RT on February 22, 2011, 08:58:39 AM
Well, I've been having a lot of drivetrain whine.....probably just a jeep thing but idk...the diff fluids grey so I'm going to see if that's it. What would shut it up better, synthetic or mineral?

chances are if it's water or debris in the fluid "making it gray" it may make a difference in noise just putting in anything clean.. it's that or you have a bearing going or ring and pinion whine !!
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RT

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Re: What's the best diff fluid?
« Reply #4 on: February 22, 2011, 02:57:44 PM »
They're was some nasty sh*t in there! lol, it was weird, there weren't any 'shavings' but the oil was 'glossy' and shiny. I ended up putting $4 80-90 and lucas stabilizer in it and it actually drives better. What sucks is that I only had a couple thousand miles on that oil, I guess I have to change it seasonally?
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Torch_Ind

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Re: What's the best diff fluid?
« Reply #5 on: February 22, 2011, 04:55:56 PM »
I do seasonally but I do a lot of under water and soupy mud.. I usually swap my fluid for winter and then run it till winter or change it if I got it contaminated..


lets just hope whatever reason your fluid was so bad it didn't cause bearing damage.
« Last Edit: February 22, 2011, 04:56:49 PM by Torch_Ind »
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RT

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Re: What's the best diff fluid?
« Reply #6 on: February 22, 2011, 08:18:14 PM »
I had a rebuild because of melted spider gears where all the bearings were replaced along with they spideys 6 or 7 months ago...maybe just breakin? idk
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Offline sharpxmen

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Re: What's the best diff fluid?
« Reply #7 on: February 22, 2011, 09:57:44 PM »
Quote from: RT on February 22, 2011, 08:18:14 PM
I had a rebuild because of melted spider gears where all the bearings were replaced along with they spideys 6 or 7 months ago...maybe just breakin? idk

how did you manage to melt the spider gears? they don't move too much under normal circumstances.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
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No Luck

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Re: What's the best diff fluid?
« Reply #8 on: February 22, 2011, 09:58:44 PM »
Mobil-1
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RT

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Re: What's the best diff fluid?
« Reply #9 on: February 22, 2011, 11:19:21 PM »
i got water in the differential and then drove cross country at 85 mph, they were nice and toasty! lol lots of steel shards and really deep ass pits in the spider gears, the shards shreaded all of the bearings and the vibration hollowed out my carrier 
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RT

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Re: What's the best diff fluid?
« Reply #10 on: February 24, 2011, 11:24:10 PM »
anyone else have a catastrophic experience like this lol
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Offline sharpxmen

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Re: What's the best diff fluid?
« Reply #11 on: February 24, 2011, 11:43:12 PM »
Quote from: RT on February 24, 2011, 11:24:10 PM
anyone else have a catastrophic experience like this lol

i blew couple of teeth on the ring and on the pinion as well.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

RT

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Re: What's the best diff fluid?
« Reply #12 on: February 24, 2011, 11:54:37 PM »
how'd you manage that
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Offline sharpxmen

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Re: What's the best diff fluid?
« Reply #13 on: February 25, 2011, 03:34:53 AM »
Quote from: RT on February 24, 2011, 11:54:37 PM
how'd you manage that

it happened on the hwy, however when i took it apart there seemed that the preload on the pinion was gone (it had some play in it) so the gears didn't mesh properly and caused wear on the teeth.
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

RT

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Re: What's the best diff fluid?
« Reply #14 on: February 25, 2011, 06:36:29 PM »
This is the first time I've changed the fluid since I got the new spideys, bearings, and carrier....is it possible i'm just seeing resin/breakin material in the fluid  :fitz:
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