1Le rear diff change - Page 2

FNxR3DNECK · 05-31-2017, 12:02 PM

I took mine to the dealer before my 1st Auto X event, had diff fluid changed, brake fluid changed to DOT 4, and track alignment done. Cost me $287, so yea sounds like you got a little hosed...

slowman · 05-31-2017, 12:57 PM

Quote:

Originally Posted by AZ_1LE

How many of those 32 ounce jugs again? 3?

2. It takes all of one and about 1/2-3/4 of the second. I used an OTC fluid transfer syringe from Amazon and it worked out well.

When it starts dripping/running out of the fill (car should be as close to parallel with the ground as possible), grab the fill plug and screw it in. Good to go.

AZ_1LE · 05-31-2017, 01:24 PM

Quote:

Originally Posted by slowman

2. It takes all of one and about 1/2-3/4 of the second. I used an OTC fluid transfer syringe from Amazon and it worked out well.

When it starts dripping/running out of the fill (car should be as close to parallel with the ground as possible), grab the fill plug and screw it in. Good to go.

Thanks man!

SS 1LE · 06-01-2017, 06:19 AM

Quote:

Originally Posted by slowman

2. It takes all of one and about 1/2-3/4 of the second. I used an OTC fluid transfer syringe from Amazon and it worked out well.

...car should be as close to parallel with the ground as possible...

This is my only reason for maybe having the dealer do it...I only have Race Ramps, so I have no way to have the car to be perfectly level.

AZ_1LE · 06-01-2017, 02:53 PM

I'm at 2500 miles, changing the rear diff fluid for the first time. Fluid was pretty dark, and this is what my drain plug looked like -

slowman · 06-01-2017, 05:38 PM

Very similar to how mine looked. Really crappy black sludgey looking stuff on the magnets.

Aragorn · 02-13-2021, 09:55 PM

I changed out the fluid today. I’d seen a youtuber pull this off without jacking up the car and figured I’d give it a go. Lo and behold I fit, barely. Not recommended if you’re claustrophobic! 1.6q.

funked1 · 02-13-2021, 10:20 PM

Quote:

Originally Posted by ge77inhigh

Went to dealer to get the rear diff fluid changed. They charged me 200$ for it. Is that normal? Feels like i am getting ripped off.

About the same here. I do it myself now.

N Camarolina · 02-13-2021, 10:22 PM

Changed mine at 1500 miles and the fluid was already a grayish color. Way darker than the new fluid that I replaced it with. Not sure how it gets dirty so fast. Maybe break-in.

Haven't locked the diff up much at all yet, but will be taking it to the track soon. Ought to be interesting to see what it looks like after a couple of track days (clear vs dirty again?)

BruceWayne1LE · 02-13-2021, 10:31 PM

For those of you guys that have owned other fun mobiles and have swapped gears in your diff before. Crown and pinion gears usually get coated with that black oxidizing coating at manufacturing. Keeps them from rusting pre install or before their destined cars are driven. That back goo is the coating wearing off. I’ve had this during break in of every car over ever had. Usually takes the third fluid change to get it all out. But I don’t think it’s destined to damage the clutches in the diff.

Fast Ken · 02-15-2021, 12:43 PM

Quote:

Originally Posted by BruceWayne1LE

For those of you guys that have owned other fun mobiles and have swapped gears in your diff before. Crown and pinion gears usually get coated with that black oxidizing coating at manufacturing. Keeps them from rusting pre install or before their destined cars are driven. That back goo is the coating wearing off. I’ve had this during break in of every car over ever had. Usually takes the third fluid change to get it all out. But I don’t think it’s destined to damage the clutches in the diff.

It seems to be magnetic. When I changed mine at 1247 miles it was all over the drain plug and even the fill plug (both magnetic) had a small clump. Does it make sense that the oxidizing coating have iron in it?

BlackbeastSS2 · 02-15-2021, 01:58 PM

Chevy dealership charged $150.

BruceWayne1LE · 02-15-2021, 03:27 PM

Quote:

Originally Posted by Fast Ken

It seems to be magnetic. When I changed mine at 1247 miles it was all over the drain plug and even the fill plug (both magnetic) had a small clump. Does it make sense that the oxidizing coating have iron in it?

Black oxide is indeed magnetic. Fe3O4

Red oxide non magnetic and corrosive Fe2O3

Honestly in the past when I’ve build a rear end for my toys, I’ve flushed the fluid 2 or 3 times during break in. I don’t think it’s super necessary but thinking of that material collecting between the clutches bugs me. Also that materiel coming off does in theory open up the lash between the pinion and crown wheel. But this is beyond any concern for a factory street car.

N Camarolina · 02-15-2021, 08:21 PM

Thanks for the info on the black oxide. That helps explain the gray/black fluid color.

When you change it yourself, it's basically just $40 in fluid (or less - 2 containers, but only 1.6 quarts), so I guess I'll just change it more frequently until it isn't turning black any more. If indeed it takes 2 or 3 changes, I'm guessing track days will likely get accelerate getting the oxide off the gears. So maybe I'll change it again after 5 hours on the track instead of 20 (currently at 1500 miles and track days will be starting in a few months).

05-31-2017, 12:02 PM	#15
FNxR3DNECK Drives: 2017 SS 1LE Join Date: Mar 2016 Location: Monterey, CA Posts: 2,474	I took mine to the dealer before my 1st Auto X event, had diff fluid changed, brake fluid changed to DOT 4, and track alignment done. Cost me $287, so yea sounds like you got a little hosed... __________________ IG: @NC_M1SS1LE

06-01-2017, 02:53 PM	#19
AZ_1LE Drives: 2019 ZL1 1LE Join Date: Feb 2017 Location: Gilbert, AZ Posts: 645	I'm at 2500 miles, changing the rear diff fluid for the first time. Fluid was pretty dark, and this is what my drain plug looked like - __________________ Old: 2017 SS 1LE Old: 2017 ZL1 Current: 2019 ZL1 1LE

06-01-2017, 05:38 PM	#20
slowman Drives: 2017 SS 1LE\|08 Civic Mugen Si Join Date: Mar 2017 Location: Central Indiana Posts: 122	Very similar to how mine looked. Really crappy black sludgey looking stuff on the magnets. __________________ 2017 Camaro SS 1LE Krypton Green YouTube

02-13-2021, 10:31 PM	#24
BruceWayne1LE Drives: 2018 Camaro SS 1LE M6 Join Date: Oct 2018 Location: Northern California Posts: 345	For those of you guys that have owned other fun mobiles and have swapped gears in your diff before. Crown and pinion gears usually get coated with that black oxidizing coating at manufacturing. Keeps them from rusting pre install or before their destined cars are driven. That back goo is the coating wearing off. I’ve had this during break in of every car over ever had. Usually takes the third fluid change to get it all out. But I don’t think it’s destined to damage the clutches in the diff. __________________ Camaro 2SS 1LE, MBRP Catback, Mishimoto Catch Can, Rotofab dry, TSP1 7/8” headers,DSX FF, Pray ported MSD, 95mm TB 492WHP 473WTQ

02-15-2021, 01:58 PM	#26
BlackbeastSS2 Drives: 2019 Camaro 1LE Shock Candy Join Date: Mar 2016 Location: Garage Posts: 1,757	Chevy dealership charged $150. __________________ LT4 1.7 Supercharger snout ported & Meth 103 Katech TB, KATECH Custom Heads, DSX In-line fuel TSP Headers, Spec P Super Twin Clutch, TSP EL C7 CAM Diamond Piston & Manley Rods, Roto Fab Big Gulp BTR Push Rods,LS7 Lifters, ARP, FI Chiller, Kirkey Seats SJM Line Lock, Hurst Pistol Grip. 747/739 RWHP street tune - 821/794 RWHP track tune 101 octane. 2014 Mini Cooper countryman S All4 M6 daily driver

02-13-2021, 09:55 PM	#21
Aragorn Account Suspended Drives: Camaro SS 1LE Join Date: Aug 2018 Location: Phoenix Posts: 1,538	I changed out the fluid today. I’d seen a youtuber pull this off without jacking up the car and figured I’d give it a go. Lo and behold I fit, barely. Not recommended if you’re claustrophobic! 1.6q.

02-13-2021, 10:22 PM	#23
N Camarolina Drives: 2021 2SS 1LE Join Date: Aug 2020 Location: Cary, NC Posts: 802	Changed mine at 1500 miles and the fluid was already a grayish color. Way darker than the new fluid that I replaced it with. Not sure how it gets dirty so fast. Maybe break-in. Haven't locked the diff up much at all yet, but will be taking it to the track soon. Ought to be interesting to see what it looks like after a couple of track days (clear vs dirty again?)

02-15-2021, 08:21 PM	#28
N Camarolina Drives: 2021 2SS 1LE Join Date: Aug 2020 Location: Cary, NC Posts: 802	Thanks for the info on the black oxide. That helps explain the gray/black fluid color. When you change it yourself, it's basically just $40 in fluid (or less - 2 containers, but only 1.6 quarts), so I guess I'll just change it more frequently until it isn't turning black any more. If indeed it takes 2 or 3 changes, I'm guessing track days will likely get accelerate getting the oxide off the gears. So maybe I'll change it again after 5 hours on the track instead of 20 (currently at 1500 miles and track days will be starting in a few months).

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