Filling the Diff

[Bullett801]

Hey guys, just a quick question for a general consensus... when filling an empty differential after a rebuild, and putting on a diff cover with a fill hole, what would you say is the proper procedure and amount for filling up the differential case.

A: Factory manual says 3.7 pints when servicing
B: Factory fill hole on the side and fill til fluid starts to run out
C: Fill from the Diff cover hole until fluid starts to run out

I appreciate it like always fellas!!!!

 

[500/600]

Remove factory plug. Fill from any location until fluid starts seeping out of the factory plug hole.

 

[fleming442]

That's, of course, IF you can get the factory plug out. It's really soft, and I mangled mine. I ended up popping the vent and used a zip tie as a dickstick.

 

[bracketchev1221]

Use the factory plug. IF by chance the fill plug in the cover is the same height then use that, but most times it is just that a fill opening, and the factory plug is the gauge.

 

[pontiacgp]

That's, of course, IF you can get the factory plug out. It's really soft, and I mangled mine. I ended up popping the vent and used a zip tie as a dickstick.

I clean out the plug and take a 12" 3/8" extension and beat it with my favorite mini sledge before I try turning it out and that seems to work. When I put it back I use penty of antiseize

 

[fleming442]

I clean out the plug and take a 12" 3/8" extension and beat it with my favorite mini sledge before I try turning it out and that seems to work. When I put it back I use penty of antiseize

I tried that.

 

[pontiacgp]

I tried that.

you should have moved on to a mid size sledge....

 

[melloelky]

That's, of course, IF you can get the factory plug out. It's really soft, and I mangled mine. I ended up popping the vent and used a zip tie as a dickstick.

as a what???

 

[Bullett801]

That is they way I did it as well guys. Thanks for the feedback and reassurance! Finally done with that chapter of this build. What a learning exp[experience! I am glad that I had a great group of guys like y'all to help and advise me along the way. Now it decision time..... to box or not to box the frame...... Yea, I know if i am worried about twisting the frame then WTH did I build a crappy 7.5 10 bolt........ cuz it was what I had, it was cheap to do, and it is my first so if (when) the 406 sbc with 500 hp/500- ft. lbs of torque shells it I will have the 9" ready to go in it's place! 😎👍🤟🤘
but.... Idk if I should box the frame. I got every suspension and steering brace that UMI offers, a very stout G-Force cross member, so for peeps have said it isn't necessary. I am not looking to take it to the track, or hook up and launch the sucker. Just a mean lil street car for shows and to some fun! Not gonna upgrade the hp or tq either in the future. I figure if I need to do that then I will find a Gen 1 and really get crazy!! LOL