post your latest differential fluid change

2009 Ford F-150 Lariat 4.6L | 6R80 | 8.8" Ford Axle

OCI = 70,000 miles (10 Years)
Capacity: 2.6QTs

Out:
Ford Synthetic 75W-140 GL-5 Gear Oil


In:
Valvoline SynPower 75W-140 GL-5 Gear Oil
 
11 Silverado front and back diffs
Out: unknown
In: Mystik 80w90 front and Mystik 75w90 in rear
12 Suburban
Out: Unknown
In: Mystik 80w90 front and Valvoline 75w90 rear
 
'05 Envoy rear differential (RWD)

Out: ACDelco 75W-90 GL-5 (88900401)
In: ACDelco 75W-90 GL-5 (88900401)

OCI: 25,000 miles
 
Originally Posted by Falcon_LS
'05 Envoy rear differential (RWD)

Out: ACDelco 75W-90 GL-5 (88900401)
In: ACDelco 75W-90 GL-5 (88900401)

OCI: 25,000 miles

Grape scented?
 
Originally Posted by dogememe
Originally Posted by Falcon_LS
'05 Envoy rear differential (RWD)

Out: ACDelco 75W-90 GL-5 (88900401)
In: ACDelco 75W-90 GL-5 (88900401)

OCI: 25,000 miles

Grape scented?


Yes. Pretty expensive around here at ~$32 a quart.
 
05 Chevrolet Trailblazer: 63,354 miles

Rear diff:
Out: factory fill GM grape juice
In: Starfire Full Synthetic 75w90

Front Diff:
Out: Factory fill GM grape juice
In: Supertech Full Synthetic 75w90

I stripped/rounded off the front diff fill plug. I had to weld a socket to it and take it out with an impact after I heated it. This is why you always pull the fill plug first. If I hadn't been able to remove the fill plug, at least I hadn't drained it yet. Old oil is better than no oil.

AFC4C12A-C433-4158-87F0-F61883671B67.jpeg
 
2008 Tundra 5.7 4x2.138k, rear diff never serviced

Out: factory fill
In: 3 qts Supertech Syn 75w90, the rest almost a full qt of Mobil1 75w90
 
The 2006 Trailblazer in my signature. 250,000km on the clock. 120,000km and close to 8 years on the amsoil 75w90 rear diff gear oil.

In went Federated Co-op group 4 based 75w90.

Will check the front diff level soon but it went be changed unless I find some sort of contamination.
 
2003 Mercury G.M. W/ 40K miles. I used a suction gun to remove around 2.5 quarts of gear oil from the differential. Probably wasn't needing doing but I got tired of looking at 3 unopened bottles of Mobil 1 synthetic 75w-90 which have been sitting in my garage for fifteen years. Bought them cheap when KMarts started disapearing. I will save the old oil to use in the leaky gear box of my rototiller.
 
Originally Posted by Lubener
Probably wasn't needing doing but I got tired of looking at 3 unopened bottles of Mobil 1 synthetic 75w-90

Perhaps the best reason for a diff service I have ever heard.
The Redline 75w85 in my garage is calling me to service the GS...
 
2017 Chevrolet 3500HD DRW
21,553 miles
Out: FF grape scented 75w90
In: 50/50 mix of Starfire 75w90 and 75w140 full synthetic

The front diff took just shy of 2 quarts and the rear took about 3.5 quarts to get it ~17mm from the bottom of the fill hole. The rear diff was under filled, a little less than 3 quarts drained out. If you fill to the bottom of the fill hole, these 11.5 AAM rear ends will hold about 4 quarts. The proper level per GM is 17-21mm below the fill hole.
 
2011 Toyota Tundra 5.7L rear differential change

Out: Factory Fill

In: Almost 4 quarts of Valvoline Synpower 75W-90.
 
1998 Mustang GT, 125k miles
Out: unknown 2 quarts dark swill

In: 2 qts 75w90 Ultralub full syn & 4 oz of Lubeguard friction modifier mixed in
 
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