[tobtech]

Can anyone tell me how much gear oil I should put in my Ford 9 inch rear end? It was built by Currie a long time ago and I am doing a frame off rebuild of my '56 Chevy. I had Currie go through the gears and replace all the seals and I reassembled it. They sold me 3 quarts and the additive for the trac-Loc but I am not sure if I should put in all 3 quarts. I have read so many things that says different amounts; 2 quarts, 2.5 quarts, "full". Come on, really? "Full" was my favorite! There has to be a specification for this, I just cannot find it.

Thanks

[big gear head]

There is a fill hole in the front of the chunk that you use to fill the rear end. Fill it until oil comes to the bottom of that hole with the rear end level. There were several different designs for the 9 inch housing, so depending on how the housing is made it could take 2, 3 or more quarts to fill it. The fill hole is the full mark. Be sure to put the oil additive in with the first bottle of oil.

[tobtech]

I did not know there was a fill hole in the front. I already put 2 quarts and the additive through the vent hole. I knew it was somewhere between 2-3 quarts so I just put 2 in. Since the car is a long way from being drivable, I figured 2 quarts was fine while I did some research to find out the proper amount. So I guess I will pull that fill hole in the front and add some more fluid until it gets to that hole.

[big gear head]

I can't remember if it's a 1/2 inch or a 3/4 inch pipe plug, but it should be there unless you have a very early 9 inch case.