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What grade of diff oil for a TrueTrac centre 

 

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 Post subject: What grade of diff oil for a TrueTrac centre
Posted: Fri Mar 22, 2019 9:06 pm 
Tyre Shredder
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Age: 49

Posts: 355

Joined: 16th Jul 2007

Ride: EL Falcon

Power: 146 rwkw

Location: sydney
NSW, Australia

Hi guys. I have fitted a brand new truetrac centre with 3.73 diff gears not long ago. Just like to know what grade of oil should i use ?
I am currently running Penrite pro gear GL-5 75w85 syn.
I have searched and googled and found you should use a GL-5 lubricant 75/80w-90. That's in USA by summite and other diff blokes up there. But here in Aus all the diff blokes are recommending 80w-140 which i feel is too thick because i have tried it. The reason why i'm saying that is that my truetrac didn't work well. I even rang Penrite and they couldn't tell me exactly what grade to use. Just like to know what you guys use, recommend or know.
I would like to stick with Penrite lub but will consider.

 

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FORD EL 4.0L. Crow cam, T.I Performance J3 Chip, Vernier cam gear, CMS stage 3 head, 68mm TB, AU head gasket + ARP studs, AU injectors, Pacey 4480, High flow cat, Shift kit, Stallie, 3:73 TrueTrac.

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 Post subject: Re: What grade of diff oil for a TrueTrac centre
Posted: Mon Mar 25, 2019 8:26 am 
Getting Side Ways
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Ride: AU2 XR8 ute & 91 EA bitsa

Location: Melbourne
VIC, Australia

Eaton recommend using a mineral oil with no friction modifiers fro Trutracs. Unfortunately, the majority of diff oils are synthetic. Nulon Premium Mineral 80W-90 Gearbox & Differential Oil might be what you're after.

 

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AU2 XR8 with Raptor VL, ported Yella Terra GT40P heads, Scorpion 1.6 RRs, XE264HR-14 Comp Cam, ceramic coated Hurricane Headers, 60lb injectors, Walbro 255, 200cfi cats, 3" exhaust & Snow Performance water methanol injection

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 Post subject: Re: What grade of diff oil for a TrueTrac centre
Posted: Mon Apr 01, 2019 9:03 pm 
Tyre Shredder
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Age: 49

Posts: 355

Joined: 16th Jul 2007

Ride: EL Falcon

Power: 146 rwkw

Location: sydney
NSW, Australia

Thank you very much Shortshift. I have decided to use the Penrite Pro Gear 75W-90 Syn.
I have spoken to Penrite tech and even he doesn't know the correct answer but did tell me that the Pro Gear 75w-90 is the best oil in that grade and will do the job.

 

_________________

FORD EL 4.0L. Crow cam, T.I Performance J3 Chip, Vernier cam gear, CMS stage 3 head, 68mm TB, AU head gasket + ARP studs, AU injectors, Pacey 4480, High flow cat, Shift kit, Stallie, 3:73 TrueTrac.

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