Rear differential fluid change

[Z28LS1]

Hey guys, I feel I need to change my rear differential fluid. My car has 83xxx miles on it and the rear end cover bolts are really rusted. I'm afraid i'm going to break a bolt when i try to take the cover off.. Has this happened to anyone? Should i be worried or are the bolts strong enough? Thanks.

[Jays00ss]

Hey guys, I feel I need to change my rear differential fluid. My car has 83xxx miles on it and the rear end cover bolts are really rusted. I'm afraid i'm going to break a bolt when i try to take the cover off.. Has this happened to anyone? Should i be worried or are the bolts strong enough? Thanks.

Just use some good penetrateing oil and let it soak for a a while. You Can always use an easy out to get the bolt out if you had to. Also a little heat would help if you have issues. You should be ok, just don't use a 3/4" drive breaker bar with a cheater.

[tonyjnjz]

how do u change the fluid? how much does it take? which kind to use? was thinking of installing a stronger rear end " pumpkin" for strength and i have no clue what im getting into but it would seem to be simple

[Y2KPewterSS]

Remove the 10 bolts from the cover and let the fluid drain out, and it will stink badly. It takes about 2.5-3 quarts to refill it. Get a new gasket or a gasket maker at a local parts store and you are good to go.

[0rion]

Hey guys, I feel I need to change my rear differential fluid. My car has 83xxx miles on it and the rear end cover bolts are really rusted. I'm afraid i'm going to break a bolt when i try to take the cover off.. Has this happened to anyone? Should i be worried or are the bolts strong enough? Thanks.

hose those bolts down with pb blaster and let them sit for a little while and you'll be fine.

[tonyjnjz]

Remove the 10 bolts from the cover and let the fluid drain out, and it will stink badly. It takes about 2.5-3 quarts to refill it. Get a new gasket or a gasket maker at a local parts store and you are good to go.

how do u refill it? if taking the bolts off lets the fluid out..how do u put it back in? lol..... i appologize if this sounds dumb......i havnt taken a close look at it yet

[Firebirdjones]

The fill plug is in the passenger side of the carrier near the pinion. Remove with 3/8 drive extension. Fill housing to the bottom of the fill hole, reinstall plug. After running the car, and a complete cool down, it's a good idea to recheck the level,,,sometimes they need a topping off.

[tonyjnjz]

ty very much...recommmendation of rear diff fluid to use?

[Jays00ss]

ty very much...recommmendation of rear diff fluid to use?

Royal purple (75W-90) then you won't (Will not) need the Posi additive.