Diff Oil level check
- Thread starter STP72
- Start date
TRWXXA
Member
A word of advice. Before you try to take it out make sure that you clean the hole that the 3/8" drive goes in . It usually gets filled up with gunk and if you don't clean it out you can easy bust your knuckles on the underside of the car. And mine was really tight.
Wise advice here. Most extensions these days are wobbles, and they suck for this application. Also, wear mechanics gloves, as more than one fellow stanger has ripped a nice chunk out of his hand when that plug lets go.
glowstang93
20+ Year Stangneter 
+1 for mechanics gloves. I never thought I needed gloves, but after getting a pair I can see the many uses for them. They protect from heat and that almighty slipping of the wrench.
That reminds me, mine is about due for an automatic transmission filter and fluid change and the rear differential too.
That reminds me, mine is about due for an automatic transmission filter and fluid change and the rear differential too.
I think it was for a structural reason with the cover. Plugs weaken its integrity, so a much heavier duty cover (almost like that of the aftermarket girdles) is needed. That'd be a big cost outlay per vehicle.
Guys have tapped the pans before but it's not something I'd do.
I just installed an aftermarket unit myself. Still is a bit annoying to fill the diff however.
blackened88lx
Active Member
It's also a good idea to check the fluid level with the car sitting level front and rear instead of with the rear end way up in the air which would make the fluid go towards the fill plug and make it seem like there's more in there.
grey5.0beast
Cookies should never be DUNKED!!!
How the hell are you supposed to even fill the damn thing then?? When I did my t-lock and gears I used 3/8 inch vacuum tubing and a hose clamp to secure it to the funnel on the fluid bottle and inserted the tube in the fill hole. Somehow I managed to get most of the fluid in. And also what is the capacity of the case?
Hehe, I have 3 small war wounds on my right hand. Two from my 81 Mustang and one from my 96 Cobra!! My how you do dumb things when you are in a hurry.
blackened88lx
Active Member
I went to Napa and bought a pump. It's just a metal tube with a rubber hose, and you pull the handle to suck fluid out of the bottle, then push it in to pump the fluid out. I think it was like $12. It should take just over 2 quarts.
TRWXXA
Member
With the rear of the car jacked up, I fill the differential through the hole for the vent, on top of the passenger side axle tube.
I use one of those cheap fluid pumps to put in 2 qts., 4 oz of lube and modifier into the differential, so I'm sure it's got enough.
I use one of those cheap fluid pumps to put in 2 qts., 4 oz of lube and modifier into the differential, so I'm sure it's got enough.
90_Red_LX
Member
Very good advice. Dad made that VERY clear that you use a flat extension and not one of the wobbles.
