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Happypants
08-25-2013, 12:24 AM
Sooo after years of always running welded diffs, we have a truck with auctual lockers in them, sooo my question is, what type of gear oils do u guys use in your diffs? I've always used standard 80-90W gear oil in most diffs along with a LS additive if it calls for it,

What do you use in a Detroit locked diff?

What do you use in a e-locked diff?

What do you use in a lunch box locked diff?

What do you use in a air locked (arb) diff?

Additives??


Lets hear your thoughts,

Nick

toyon35s
08-25-2013, 01:10 AM
I've always just ran straight Lucas in my diffs , never have had a problem ever

Tunabomber
08-25-2013, 02:15 AM
80-90 for Detroit

As for the others im also curious

procircuit
08-25-2013, 07:47 AM
Spit:D

dirka dave
08-25-2013, 07:58 AM
I use 85/140 and Lukas oil in my Detroit, arb and in my e-locker.

85chevy
08-25-2013, 09:12 AM
Kinda thought the only thing that needed an additive was the clutch style limited slip because just using straight 80w90 doesn't allow them to slip. Every thing else just needs Extreme Pressure Gear oil

Happypants
08-25-2013, 10:22 AM
That's what I wasn't sure about terry, when I had my diffs welded I always just ran regular 80-90w and thought nothing of it, but detroits and what not I don't have a clue lol

Same with some old transmissions I know if u run Lucas gear oil in a scout t-18, u won't be able to shift lol, too thick of oils, but at the same time 90-140W is too thin, 80-90W is too thin, what about a HD 50W gear oil or something along thoes lines?

dirka dave
08-25-2013, 10:40 AM
http://www.kewengineering.co.uk/Auto_oils/oil_viscosity_explained.htm


good read.

procircuit
08-25-2013, 10:41 AM
Lucas 75/140..

atoyot
08-25-2013, 10:57 AM
have my detroit in my 8.8 in my ford.....
im not nice to it...
i do regular fluid changes... run 80/90......
been usin it 10 years now....200000+ kms on it noo probs!
.
..

.

vajayjay
08-25-2013, 11:36 AM
I use 85/140 and Lukas oil in my Detroit, arb and in my e-locker.


I guess buses use 85/140 :confused0006:

arjan
08-25-2013, 12:02 PM
I guess buses use 85/140 :confused0006: [15] [15] [15] [15]

nbrowser
08-25-2013, 12:23 PM
hrm last time I checked...it was a case of read the manual....I'm fairly certain these locker manufacturers supply a manual with lube requirements, etc.

Happypants
08-25-2013, 12:26 PM
hrm last time I checked...it was a case of read the manual....I'm fairly certain these locker manufacturers supply a manual with lube requirements, etc.

Not when u but a truck that already has the diffs locked

4skin
08-25-2013, 01:18 PM
I guess buses use 85/140 :confused0006:

Beat me to of vag
All the info is available on line happypants

Some t cases run strait 40 wt engine oil and some ATF
And will burn up from to thick a lube

Happypants
08-25-2013, 01:29 PM
Beat me to of vag
All the info is available on line happypants


Yea...I know...

dirka dave
08-25-2013, 02:13 PM
I guess buses use 85/140 :confused0006:

Duh.

:D

Chopstick
08-25-2013, 03:15 PM
I use 80/90w or 85/140 when i can score some from work but i use atf in my tranny an tcase cause it cools down faster then heavier oils!

stockwheels
08-25-2013, 05:42 PM
Iv allways had good luck using gypsy tears

pumpkin
08-26-2013, 09:07 AM
All lockers use the same fluid, detroit or lincoln. Special addatives are only for traction devises that have slip to them, clutches, or cones. So what ever an open diff for that aplication is the fluid you need.

Apathy
08-26-2013, 09:34 AM
Beat me to of vag
All the info is available on line happypants

Some t cases run strait 40 wt engine oil and some ATF
And will burn up from to thick a lube

using 85-140 is fine.
Many vehicles use it.

My TrueHi9 demands you use it.

I put the same in my front D44 with Detroit. Have for years... no issues.

EIEIO
08-26-2013, 02:37 PM
i use 80-90 Quaker State in my e-locked yota.

85chevy
08-27-2013, 10:56 PM
I use 80/90w or 85/140 when i can score some from work but i use atf in my tranny an tcase cause it cools down faster then heavier oils!
Its not the cooling down u have to worry about if its a Gear driven transfer case they usually need Extreme Pressure additives while a chain driven transfer case can benefit from the ATF because like yea said its thinner and can lubricate the chain much faster and easier. Same with a transmission older transmission are sliding collar or sliding gear where as newer ones are syncromesh which don't move the gears in mesh they usually are spinning on the shaft already with there mated gear.