Post your latest differential oil/transfer case change

2018 Tundra- 167,000 miles on truck- 87,000 miles on fluids mentioned below (yeah I got slack)
Transfer Case
Out: Ravenol 75w
In: Redline MT-LV

Front and Rear Diff
Out: Ravenol 75w85
In: Royal Purple 75w90

Will be doing the same on 2019 4Runner in the next couple weeks from factory fill.
 
04 Chevy Avalanche, 190k miles
Had a shop replace the pinion seal as it was leaking early this year, the receipt notes they topped off w 75w140. Manual calls for synthetic 75w90. Drove it as is and did not notice any difference, but decided to go ahead and do a full fluid replacement. While at it, replaced the cover w this nice Yukon cover and upgraded the panhard bar as well.
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04 Chevy Avalanche, 190k miles
Had a shop replace the pinion seal as it was leaking early this year, the receipt notes they topped off w 75w140. Manual calls for synthetic 75w90. Drove it as is and did not notice any difference, but decided to go ahead and do a full fluid replacement. While at it, replaced the cover w this nice Yukon cover and upgraded the panhard bar as well. View attachment 154856View attachment 154857View attachment 154858View attachment 154859
did you add LS additive to that delvac? i assume you have the auto locker?
 
G80…limited slip additive not required
OK, I have had issues in the past with the locker locking while in a turn or quick start when I did not use an LS oil. Recently, in my 2015 GMC 3500, using Amsoil Severe Gear, My diff locked up and would not come out easily. Added the Slip Lock additive, and issue was gone.

I have had this issue several times in the last 30 years. Maybe you just dont ever have the rear lock up and then not unlock, I understand that many people say that the g80 does not require it, but, many never actually use their trucks either. Eaton actually recommends 80w90 non synthetic. https://www.eaton.com/us/en-us/prod...trol/aftermarket-differentials/posi-faqs.html

I run a LS oil, or add the modifier.
 
2020 Equinox 1.5T AWD, 33650
Drove around for 2 days about 100 miles after 1st dump and fill then did 2nd dump and fill with Castrol Max Trans DexronlV. Also did front transfer case with Valvoline transfer case fluid it’s a direct replacement for GM stuff. TV was a pain in the ass
 
2006 Toyota Tacoma, RWD, 2.7, base model, open rear diff.
134k on truck
I purchased Jan of 2020 with 111k miles.
It has been on my list to change since I bought the truck, always seems to be something more pressing to do. Finally, did it last night.
Unknown if has ever been changed before, it did not appear so to me.
Fluid looked fine though. Just a normal little blob of fuzz on the drain plug magnet.
Had to get out the impact to break the plugs loose.
Filled with Valvoline 80W-90 dino oil. Took just about the whole gallon.
Plenty of room to work once I pulled the spare tire out.
No towing or hauling. I drive like an old grandpa.
Put new OEM crush washers on and torqued the plugs to the 36 Ft-Lb spec.
 
2019 Jeep Wrangler Sport S with 30k. Was planning to do at 20k but never got around to it.
Rear differential with LSD
Out: Factory fill
In: Valvoline Synthetic 75-140 from the pouches.

On a side note, those pouches sure are convenient.
 
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2021 Ram 2500. Dropped FF at 16k miles, refilled with Mystik 75w-90.
2020 Ford Expedition. Drained FF at 36k miles, refiled Mystik 75w-90.

1997 C2500 Suburban. 178k on rear axle, drained AC Delco 80w-90, refilled with 80w-90 from Texas Refinery Corp. I decided to change the oil after reading repair history on vehicle and noting multiple repairs in the past (axle bearings, axle seals, and pinion seals). This Suburban has done a lot of cross country towing, and I would not be surprised of the axle ran hot. Despite being apart for previous repairs, it looked like the magnet in the bottom of housing had never been cleaned - it had 1/4" of metallic goop on it. Hopefully I don't have to go back inside the axle for a long time.
 

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04 Chevy Avalanche, 190k miles
Had a shop replace the pinion seal as it was leaking early this year, the receipt notes they topped off w 75w140. Manual calls for synthetic 75w90. Drove it as is and did not notice any difference, but decided to go ahead and do a full fluid replacement. While at it, replaced the cover w this nice Yukon cover and upgraded the panhard bar as well. View attachment 154856View attachment 154857View attachment 154858View attachment 154859
Just got another 4 quarts of Delvac 1 from Summit - added plugs for the 2017 to get the free shipping deal …
Used D1 for many years …
 
1995 Chevrolet Silverado 1500
Replaced axle seals and bearings, pulled cover to access c clip retainers
Out: unknown oil
In: STP conventional 80w90
 
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