Diff capacities

[steveved]

I have a 2014 Silverado 1500 LTZ 4x4 with the 5.3L engine.

 

I just spent 30min digging through the manual looking for how many quarts of diff fluid I will need to change the fluid in the front and rear axles.

 

I now have 4872 miles and want to change them both at 5000...

 

Problem is: the manual only lists what fluid you need... Not how much. But they list the engine oil, transmission and transfer case capacity? Why not the diffs?

 

Does anyone know how much 80W-90 fluid I will need for the front axle? And how much 75W-90 I will need for the rear?

 

Thanks in advance.

[txab]

Use 75w-90 in both

 

 

Differential, 8.25 RingGear Front..........3 pints
Differential, 8.6 RingGear Rear..........4.2 pints
Differential, 9.5 RingGear Rear..........5.5 pints

[FL335i]

GM uses a synthetic 75w-85 in the rear and dino 80w-90 in the front diff from the factory. I'm wondering if I should run the GM 75-85 in both or M1 75-90 in both.

[CAtaylor]

GM uses a synthetic 75w-85 in the rear and dino 80w-90 in the front diff from the factory. I'm wondering if I should run the GM 75-85 in both or M1 75-90 in both.

I am running 75-90 Amsoil Severe Gear in both. No issues. Your call though.

[txab]

GM uses a synthetic 75w-85 in the rear and dino 80w-90 in the front diff from the factory. I'm wondering if I should run the GM 75-85 in both or M1 75-90 in both.

75w-90 in both

[FL335i]

I have the g80 locker. Does it require special fluid? Or additive? Is it a mechanical or disc locker??

[Z45]

I have the g80 locker. Does it require special fluid? Or additive? Is it a mechanical or disc locker??

No additive required, mechanical locker and any additive added can have a negative effect on it operation. Flat out, its not needed.

 

Additives are designed to be use in Limited Slip differentials which are normally installed in cars, performance cars for the most part.

[fondupot]

Why do you want to change the fluid at 5000 miles?

[CAtaylor]

Why do you want to change the fluid at 5000 miles?

Mine didn't look great when I did the ring and pinion swap at 3500 miles. Wasn't milky but had a whitish tint to it, also looked like it had glitter in the oil from metal. Front looked good but it had hardly no 4WD time at that point.

[FL335i]

Ive built diffs for rock crawling. Diffs breaking in create a lot of heat and wear particles. Ive done 1000 mile changes before. But on street vehicles. Already filled with syn lube. A 5 or 10k initial change is good. Then you can go 30k+ intervals depending on towing racing etc use.

[newdude]

I have a 2014 Silverado 1500 LTZ 4x4 with the 5.3L engine.

 

I just spent 30min digging through the manual looking for how many quarts of diff fluid I will need to change the fluid in the front and rear axles.

 

I now have 4872 miles and want to change them both at 5000...

 

Problem is: the manual only lists what fluid you need... Not how much. But they list the engine oil, transmission and transfer case capacity? Why not the diffs?

 

Does anyone know how much 80W-90 fluid I will need for the front axle? And how much 75W-90 I will need for the rear?

 

Thanks in advance.

 

 

1500 trucks, for all rear axles use GM 75w85 high efficiency synthetic gear lube part #19300457. Front axle is 75w90 synthetic part # 88900401.

[Remmag]

Ca taylor

I see you did a ring and pinion swap

I plan on having mine done when gear sets are available

 

Can you give me some idea of what I'm in for

Mine is crew cab 4x4 with 308

Want to go to 342

Can you give me some iSight what I'm looking at

Cost wise

What all has to be done

 

Thanks

[CAtaylor]

Ca taylor

I see you did a ring and pinion swap

I plan on having mine done when gear sets are available

 

Can you give me some idea of what I'm in for

Mine is crew cab 4x4 with 308

Want to go to 342

Can you give me some iSight what I'm looking at

Cost wise

What all has to be done

 

Thanks

You can see the whole process here. If you have any specific questions after reading through it shoot me a PM.

http://www.gm-trucks.com/forums/topic/158167-gear-change-95-12-bolt/