Changing 20+ year old differential fluid on my Military Square body Chevy

This was long over due! the gasket was letting go and was very brittle!

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BERTRAND850
po box 28154
Panama City fl 32411

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Duramax Mods
Gloss Dark Grey wrap
24x14 TIS Forged
40/15.50r24 Nitto trail grappler
10-12" cognito lift with dual fox shocks in front and fox in the rear
10" deaver springs,
Cognito ladder bars and Cognito limit straps
DMAXstore Stage 3 front end upgrade package
Redhead steering box
Kory Willis tuned efi live dsp5
Profab downpipe to magnaflow 5" straight pipe to 7” axle dump
Pcv reroute
Afe intake
Afe bladrunner mouthpiece
Fass 220 fuel pump with sump
Sinister egr delete
Danville pinned waterpump
Merchant auto thermostats.
Fully built suncoast allison with upgraded mag hytec pan
4.56 Yukon gears with mag hytec dif cover
Console vault safe
Autometer gauges
Edge cts insight
Pioneer avic8000 nex
Pro box 10" behind the seat, matts audio door speakers and tweeters.
Full LEDs in dash and clusters
Rigid industries pods in bumper,
@retrodiodes heads
30" offroadLED lightbar behind the grille
Ebay tail lights
Recon 3rd brake light
Mictuning rock lights
Royalty Core Grille
fusion Front bumper
Road Armor rear bumper
AMP Research steps
Boost auto tow mirrors
B&w drop hitch
GEN-Y Hitch
Weathertech visors
Weathertech mats
Rhino lined bedliner
Truck covers usa tonneau cover
Bad flag flag poles
2% tint
Valentine 1 radar detector with blend mount.