Diff Fluid

tsakow · 05-09-2018, 01:37 PM

New to the forums and my first post. I have a ZL1 1LE and taking it to the track for the first time. I am swapping the brake fluid and oil as recommended but having trouble finding the Differential Fluid that I should use. In the car groups here in Tampa, people are recommending Redline, Amsoil and Royal Purple.

I have seen AC Delco 75W-90 posted on the forums as well.

Any recommendations would be great and what weight?

ZL1 1LE · 05-09-2018, 01:46 PM

The general consensus is to stick with the OEM:

https://www.amazon.com/ACDelco-10-40.../dp/B008BZS6J8

hawk02 · 05-09-2018, 01:47 PM

Really no need to look at other brands. Just stick with the recommended AC Delco gear oil.

SJFGTO · 05-09-2018, 10:10 PM

I would go with the specific designation by GM engineers over random brand names thrown around by friends.

rjacobs · 05-10-2018, 09:39 AM

I would run Amsoil if I could figure out how much slip lock additive to put in...but nobody will publish the number and I dont feel like experimenting with a 2000+ dollar differential.

So I will be, against my desires, running the GM fluid.

Buy it at Amazon because the dealership prices are akin to rape without lube.

DangerZL1 · 05-10-2018, 12:39 PM

Quote:

Originally Posted by rjacobs

Buy it at Amazon because the dealership prices are akin to rape without lube.

I know there's a pun in here somewhere.

tsakow · 05-10-2018, 02:35 PM

Many thanks to all... it is hard when you have a lot of people giving you advise who don't own the car.

very much appreciated!

unavailablezl1 · 05-10-2018, 04:38 PM

Quote:

Originally Posted by DangerZL1

I know there's a pun in here somewhere.

Yes, you buy the lube to get raped without lube....

unavailablezl1 · 05-10-2018, 04:41 PM

Quote:

Originally Posted by tsakow

Many thanks to all... it is hard when you have a lot of people giving you advise who don't own the car.

very much appreciated!

I was reading somewhere that there are connections that hold gear lube as well as the cooler. It said you have to pay attention to the connections, as it is not just a straight drain and fill, like on my Tacoma. One reason I have put off changing it. I need more research.

Anyone chime in....

SJFGTO · 05-10-2018, 04:44 PM

Quote:

Originally Posted by unavailablezl1

I was reading somewhere that there are connections that hold gear lube as well as the cooler. It said you have to pay attention to the connections, as it is not just a straight drain and fill, like on my Tacoma. One reason I have put off changing it. I need more research.

Anyone chime in....

Just drain and fill. I do it in my driveway. Easy.

Inthepasture · 05-13-2018, 09:24 PM

I recommend you change it twice in the first 5000 miles. First around 1250 and then again at 5000. When I changed mine at 1500 it was black. Remember that you are not able to flush the differential cooling radiator nor the lines to the front end and back.

05-09-2018, 01:37 PM	#1
tsakow Drives: 2018 ZL1 1LE Join Date: Nov 2017 Location: Tampa Posts: 2 View My Garage	Diff Fluid New to the forums and my first post. I have a ZL1 1LE and taking it to the track for the first time. I am swapping the brake fluid and oil as recommended but having trouble finding the Differential Fluid that I should use. In the car groups here in Tampa, people are recommending Redline, Amsoil and Royal Purple. I have seen AC Delco 75W-90 posted on the forums as well. Any recommendations would be great and what weight?

05-09-2018, 01:46 PM	#2
ZL1 1LE @zle_blackwing Drives: 2018 ZL1 1LE Join Date: Mar 2017 Location: S OC Posts: 1,390	The general consensus is to stick with the OEM: https://www.amazon.com/ACDelco-10-40.../dp/B008BZS6J8 __________________ 2018 ZL1 1LE - Red Hot, Nav, PDR

05-09-2018, 01:47 PM	#3
hawk02 Coupe Newbie Drives: '23 CT5-V BW, '21 Corvette HTC Join Date: Jul 2011 Location: Columbus, Ohio Posts: 3,442 View My Garage	Really no need to look at other brands. Just stick with the recommended AC Delco gear oil. __________________

05-09-2018, 10:10 PM	#4
SJFGTO Oh Oh it's Friday Night! Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018 Location: Walton Woods Posts: 1,073	I would go with the specific designation by GM engineers over random brand names thrown around by friends. __________________ 2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm Four that wanna own me Two that wanna stone me One says she's a friend of mine...

05-13-2018, 09:24 PM	#11
Inthepasture Drives: 2017 Camaro 2SS Join Date: Oct 2016 Location: Bakersfield, CA Posts: 54 View My Garage	Differential Oil I recommend you change it twice in the first 5000 miles. First around 1250 and then again at 5000. When I changed mine at 1500 it was black. Remember that you are not able to flush the differential cooling radiator nor the lines to the front end and back.

05-10-2018, 09:39 AM	#5
rjacobs Drives: none Join Date: Nov 2012 Location: Dallas, tX Posts: 248	I would run Amsoil if I could figure out how much slip lock additive to put in...but nobody will publish the number and I dont feel like experimenting with a 2000+ dollar differential. So I will be, against my desires, running the GM fluid. Buy it at Amazon because the dealership prices are akin to rape without lube.

05-10-2018, 02:35 PM	#7
tsakow Drives: 2018 ZL1 1LE Join Date: Nov 2017 Location: Tampa Posts: 2 View My Garage	Many thanks to all... it is hard when you have a lot of people giving you advise who don't own the car. very much appreciated!

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