Best Differential Oil? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

GAD · 02-25-2021, 01:57 PM

I just received my 3.91 gears and Detroit Trutrac. Planning on doing the install this weekend. Wondering what’s the best / recommend gear oil?

Thanks!

Moto-Mojo · 02-25-2021, 02:14 PM

For a bunch of years I used Amsoil Gear Lube. Worked in everything...except this Camaro! It liked the GM OE stuff better. (quieter) But that’s on a stock diff.

Avenging Orange · 02-25-2021, 03:11 PM

Detroit Trutrac does not recommend synthetics or friction modifiers. (fyi)
Go to their web page for recommendations.

GAD · 02-25-2021, 03:25 PM

Quote:

Originally Posted by Avenging Orange

Detroit Trutrac does not recommend synthetics or friction modifiers. (fyi)
Go to their web page for recommendations.

Ah, good to know. I’ll go check out what they recommend. Thank you!

cdb95z28 · 02-25-2021, 08:19 PM

I've been using Lucas 85w-140 conventional gear lube with my TrueTrac. I run the Z/28 diff cooler to help keep the temps in check since I track mine.

InFiD3ViL · 02-25-2021, 11:31 PM

Quote:

Originally Posted by Moto-Mojo

For a bunch of years I used Amsoil Gear Lube. Worked in everything...except this Camaro! It liked the GM OE stuff better. (quieter) But that’s on a stock diff.

I have had good luck with the Amsoil Severe Gear 75W-90 in my rear so far (didn't use additional Friction Modifier). But the car is so damned loud that I probably wouldn't hear if it was making noise!

mikeman · 02-26-2021, 07:59 AM

I use Mobil 1 with the OE friction modifier.

Coz3z3 · 02-26-2021, 09:32 AM

Amsoil here as well. Used Amsoil in the 1LE with GM friction modifier. And now Amsoil in the Z/28 without the modifier. Have not had any issues with either and I tracked both

Moto-Mojo · 02-26-2021, 10:04 AM

Quote:

Originally Posted by InFiD3ViL

I have had good luck with the Amsoil Severe Gear 75W-90 in my rear so far (didn't use additional Friction Modifier). But the car is so damned loud that I probably wouldn't hear if it was making noise!

It was night and day with mine. I was bummed to have to drain 2-day old Amsoil. But it's possible if it was really loud I wouldn't have caught it. Only when turning, of course.

Good to know about the TruTrac recommendation.

02-25-2021, 01:57 PM	#1
GAD Drives: Silver 2014 Camaro 2SS Join Date: Dec 2018 Location: Knoxville Posts: 225	Best Differential Oil? I just received my 3.91 gears and Detroit Trutrac. Planning on doing the install this weekend. Wondering what’s the best / recommend gear oil? Thanks! __________________ 2014 Silver 2SS L99 with Roto-Fab CAI, Kooks LT Headers, Kooks Cat-less 3” exhaust, TS Stage 3.2 VVT CAM, Circle D 3200 Stall, E85 Kit, FIC 850cc injectors and Elite Engineering Catch Can. Dynoed at 478rwhp.

02-25-2021, 02:14 PM	#2
Moto-Mojo Fast Cars and Old Guitars Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012 Location: N. CA Posts: 3,973	For a bunch of years I used Amsoil Gear Lube. Worked in everything...except this Camaro! It liked the GM OE stuff better. (quieter) But that’s on a stock diff. __________________ “I don’t want to belong to any club that would have me as a member.” - Groucho Marx

02-25-2021, 03:11 PM	#3
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Detroit Trutrac does not recommend synthetics or friction modifiers. (fyi) Go to their web page for recommendations. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

02-25-2021, 08:19 PM	#5
cdb95z28 Drives: 2022 1SS 1LE A10 BCD WCT+PDR Join Date: Mar 2008 Location: Johnstown, PA Posts: 3,204	I've been using Lucas 85w-140 conventional gear lube with my TrueTrac. I run the Z/28 diff cooler to help keep the temps in check since I track mine. __________________ 2022 1SS 1LE A10 BCD WCT+PDR2014 1SS 1LE NPP RECARO SIM-SOLD1995 Z28 M6 GSC PGM-SOLD1975 NOVA COUPE 300HP 350 TH350 FLASH RED-SOLD

02-26-2021, 07:59 AM	#7
mikeman Banned Drives: 2015 Camaro Join Date: Aug 2018 Location: My Garage Posts: 1,125	I use Mobil 1 with the OE friction modifier.

02-26-2021, 09:32 AM	#8
Coz3z3 Drives: 2015 Z/28, 2015 1LE Join Date: Feb 2017 Location: Nevada Posts: 583	Amsoil here as well. Used Amsoil in the 1LE with GM friction modifier. And now Amsoil in the Z/28 without the modifier. Have not had any issues with either and I tracked both