12 Bolt fluid Capacity

[1978Blazerk5]

Well I got one of these covers
http://store.summitracing.com/partd...785122+4294891994+4294901325+115&autoview=sku

and there is no fill plug so how can i tell if i have enough? also I am gonna do the front right away(d44) how much gear oil should i buy?


Thanks

 

[dyeager535]

Can't tell you what capacity is off the top of my head, but for rear axle, you fill from the front side of the diff, on the passenger side, using a 3/8" ratchet with extension to pull the plug. Assuming a standard pinion angle, on flat ground you fill it until it starts to leak out of the hole.

According to other posts, 2.25 qts for the 12 bolt.

 

[1978Blazerk5]

Ok thank you.

Does any one know what a dana 44 holds?

 

[pauly383]

Same thing , just fill it until it comes back out the fill hole . The more the merrier . I never measure , I just dump in until it takes no more

Axles lube themselves by the gears carrying oil to built in channels or passages it uses to feed everything that needs it ( bearings in tubes and pinion , as well as the gears ) Axles don't have pumps . You want enough to submerge the ring gear and come up to the bearing level , as well as able to get down the tubes .

Fronts are sealed off just past the carrier bearings with seals in the tubes , so fronts hold less .