Anyone use Delo Synth Gear Oil? - Dodge Cummins Diesel Forum
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post #1 of 8 (permalink) Old 02-26-2016, 11:16 PM Thread Starter
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Anyone use Delo Synth Gear Oil?

I won`t pay $400 that is asked for rear diff oil change. Lube shop offers good price and they stock Delo Synth. Do you use Delo 75-90?


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post #2 of 8 (permalink) Old 02-26-2016, 11:23 PM
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you can do it yourself in about 10 min.
i just did both mine today front rear and t-case in 33 minutes.
delo is a good oil. any that meat the GL-5 will be good. if you have limited slip then you'll need a bottle of the additive.

04 QCLB. 48re, 4x4,08 mega g56, 4x4.

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post #3 of 8 (permalink) Old 02-27-2016, 02:56 AM
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When did our limited slips start requiring additive?

2014 3500 Tradesman CCSB, SRW, 6.7, G56, QG56DDSN-ORG, ST MAXX 295/70-18
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post #4 of 8 (permalink) Old 02-27-2016, 08:24 AM Thread Starter
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Thanks Killer.

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post #5 of 8 (permalink) Old 02-27-2016, 08:29 AM
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This is what I used when I changed the rear differential in my truck.

AMSOIL Severe GearŪ 75W-90

Also, copied & pasted from my 2012 owners manual:

Front and Rear Axle – 2500/3500
Models
Synthetic, GL-5 SAE, 75W-90 or equivalent. Limited-Slip 10.5/11.5 inch
Rear Axles Limited slip additive is not required.

2012 SLT 3500, CCLB, HO, SRW 4x2, 4.10s, 68RFE, Mineral Grey, Pacbrake air springs, Fumoto oil valve, Cat/Cummins Dual Filter kit, Edge CTS Monitor.
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post #6 of 8 (permalink) Old 02-27-2016, 10:08 AM
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Quote:
Originally Posted by BoDiesel View Post
I won`t pay $400 that is asked for rear diff oil change. Lube shop offers good price and they stock Delo Synth. Do you use Delo 75-90?
I put it it my truck, The company I work for uses it in our semis and change it out every 2 years regardless of miles and I know they are putting more miles on there semis in 2 years than I am in 7-8 years.

2010 crew cab long bed 2500, EFI Live Anarchy Diesel CSP5, edge cts2 with pyro, 5" tbe, S&B cai, B&W Hitch, Carli swaybar, ball joints, steering stabilizer and track bar, Thuren 2in coils, overland shocks, metalcoak arms ARP 425s, airdog 165
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post #7 of 8 (permalink) Old 02-27-2016, 10:17 AM
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Quote:
Originally Posted by Quint View Post
When did our limited slips start requiring additive?
You are correct, the newer AAM axles don't need the additive.
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post #8 of 8 (permalink) Old 02-28-2016, 01:13 AM
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Quote:
Originally Posted by Quint View Post
When did our limited slips start requiring additive?
They don't require additives as they have no clutches. They are a gear type LSD.

2012 3500 Laramie CCLB DRW 4x4 6.7 HO 4.10 Max Tow 68RFE Ride-Rite TransferFlow
2004 2500 Laramie CCSB SRW 4x4 5.9 HO 3.73 48RE Linex Ride-Rite Sold

Last edited by gotdiesel04; 02-28-2016 at 01:16 AM.
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