Diff Fluid

[grose67]

I have seen numerous posts on what type of fluid to use when changing diff fluid. My question is, how much does a typical diff hold?

[Black02Silverado]

On average 3qts will be enough for the average differential. It usually takes just over 2 depending on what size you have. Here is a list for your year truck, I didn't know the specifics so this is what is listed for a K1500 with a 5.7L

Differential, 10.5 RingGear Rear..........6.4 pints

Differential, 11 RingGear Rear..........8.5 pints

Differential, 8.5 RingGear Rear..........4.3 pints

Differential, 8.6 RingGear Rear..........4.3 pints

Differential, 9.5 RingGear Rear..........5.5 pints

 

There are 16oz's to a pint, so two pints = 1qt.

[urway2slow]

I have seen numerous posts on what type of fluid to use when changing diff fluid. My question is, how much does a typical diff hold?

 

Buy 3 quarts but it won't take that much.. I read on here trying to find out exactly how much and couldn't find an exact answer. So I drained it and put in 2 quarts and then on the third I would pour in 1/3, check it, and another 1/3 check it. Just make sure its about an inch below the fill hole like they say on the rear end tag. I used 75/90 mobil synthetic. I asked the dealer and they recommended synthetic with no limited slip additive. Also put some teflon or something of the sorts on the plug threads to keep it from leaking. Another thing you could do is drain your fluid into something so you can measure how much was in there and put the same amount back in it. Assuming it was at the correct level before.

 

good luck.

[Nytemare]

I have seen numerous posts on what type of fluid to use when changing diff fluid. My question is, how much does a typical diff hold?

 

Buy 3 quarts but it won't take that much.. I read on here trying to find out exactly how much and couldn't find an exact answer. So I drained it and put in 2 quarts and then on the third I would pour in 1/3, check it, and another 1/3 check it. Just make sure its about an inch below the fill hole like they say on the rear end tag. I used 75/90 mobil synthetic. I asked the dealer and they recommended synthetic with no limited slip additive. Also put some teflon or something of the sorts on the plug threads to keep it from leaking. Another thing you could do is drain your fluid into something so you can measure how much was in there and put the same amount back in it. Assuming it was at the correct level before.

 

good luck.

 

+1

[alwcurlz]

Not sure about 1998 but, it may be similar to later years? On my 373 G80 locker differential, 1999 GMT800 I put the amount recommended in, I think 2.7 qts. The instructions for filling were to fill it to 10mm below the fill hole, like we can put a measuring stick in the hole. No explanation was given as to it being filled till it comes out the fill hole either. Used to be before that we could just fill till it came out the fill hole. Simple.

[Nytemare]

Not sure about 1998 but, it may be similar to later years? On my 373 G80 locker differential, 1999 GMT800 I put the amount recommended in, I think 2.7 qts. The instructions for filling were to fill it to 10mm below the fill hole, like we can put a measuring stick in the hole. No explanation was given as to it being filled till it comes out the fill hole either. Used to be before that we could just fill till it came out the fill hole. Simple.

10mm is about 3/8"...so put it in till you can barely touch it with your pinky finger...thats what I always do.

[Orsen]

It is the oil that goes in the rear end of rear wheel drive cars and it has gears inside it which are immersed in the fluid(80/90W gearoil) You see differentials when following behind dump trucks.

[txab]

It is the oil that goes in the rear end of rear wheel drive cars and it has gears inside it which are immersed in the fluid(80/90W gearoil) You see differentials when following behind dump trucks.

 

Ok..........

[Nytemare]

It is the oil that goes in the rear end of rear wheel drive cars and it has gears inside it which are immersed in the fluid(80/90W gearoil) You see differentials when following behind dump trucks.

 

Ok..........

 

+1

?????????????????

[RaddHazzard]

What is gear oil? And what is that i see when driving behind dump trucks?

 

 

It is the oil that goes in the rear end of rear wheel drive cars and it has gears inside it which are immersed in the fluid(80/90W gearoil) You see differentials when following behind dump trucks.

 

 

Oh, ok.

[dlstewart01]

 

could be 75W90

[alwcurlz]