Front Diff and Transfer Case Oil Change Howto

I hope they are fresher then here - we call them Skunkers

 

Did the front and rear diffs today. The oil from the front diff gushed out so fast, I think almost a quart of it overshot the can that was supposed to catch it. Is it weird that after 60K, the front diff plug was the only one to have shavings on it?

 

curious if its ok to change the front diff fluid while the front end is on ramps?

 

I changed all my fluids a week ago and a question I have is: "was it necessary to change the transfer case if I rarely use 4WD?" There's 190,000 miles but I'll bet there's not 1,000 4WD miles.

 

Same experience here. Did mine at 90k and front diff was dark black and had shavings on the plug. Transfer case and rear diff looked good though

 

Just a little info. About a year or so ago I had the front and rear diff fluid changed with the Valvoline diff fluid. supposedly this fluid is supposed to have the limited slip additive built into it. Well over time I started to feel a chatter/shudder when turning hard left and right. So I changed the fluid again myself. This time I put in BG Products Ultra Guard Full Syn fluid https://www.bgprod.com/catalog/drive-line/bg-ultra-guard-full-synthetic-gear-lubricant/#bg-product-6 with their Limited Slip additive and the chatter/shudder has gone away https://www.bgprod.com/catalog/driv...-slip-axle-additive-concentrate/#bg-product-7

 

The whole limited slip thing is confusing. I think the Valvoline gear oil is compatible with LSDs, but you still have to use an additive -- but only if you have a true mechanical LSD and not the electronic Auto LSD.

And again, to window's question, regardless of 4WD usage, I would recommend changing every 60K miles. That oil sitting in there for 5 years or so is probably not in the best shape.

 

I did the rear today, "09" 30k,, the oil may have looked a little cloudy, drained 96 oz's out, filled with 100 oz.will try and get the front later this week

 

I hadn't thought about the time aspect. Other than it's the hardest one to get to, another quart of oil as long as I'm buried under there isn't that big of a deal no matter the mileage.
Thanks.

 

Future Reference

Engine 5.5 qrts /5-30w
Front Diff 1.6 qrts /80-90w GL-5
MT Transmission 1.9 qrts / 75W90 GL-4 /GL-5 Gear Oil
Transfer Case 1.05 qrts /

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 GL-4/ GL-5 Gear Oil
Rear Diff 3.0 qrts 80-90w GL-5

Front/Rear Diff 4.6 Quarts total = 1 gallon + 1 quarts
MT Tranny/ Transfer Case = 3 quarts
1 Gallon bottle + 4 quarts bottles.

Trq Spec's
Oil Drain Plug.....30 ft/lbs
Manual Transmission
Fill Plug 27 ft/lbs
Drain Plug 27 ft/lbs
Transfer Case
Fill Plug 27 ft/lbs
Drain Plug 27 ft/lbs

 

You don't even know

 

Yea i do. Cause i change my oil

 

wait...you mean you have to change the oil in these things?!

 

yep makes the truck last longer.

 

mind = blown.

 

make sure you change you bearing oil.

 

I think my blinker fluid is low.

 

Make sure you use Synthetic