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Thread: What gear oil

  1. #1
    Join Date
    Oct 2007
    Location
    weatherford,TX
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    504

    What gear oil

    i got my rear end back from fort worth gear and axle friday they put the tru trac in but did not put any gear oil back in its dry what do i need to run in it, they said to change after the first 500 miles
    [SIGPIC]5.3 k&n cai ,asm lt, hf cats, aero turbine muffler, vhp 216/224-551/551-115lsa, tbss intake, ls2 90mm tb,tb bypass, comp double roller tc, hv oil pump, ls2 injectors,nelson tune, b&m super cooler, taylor 10.4mm wires, ngk tr55ix, 373 Detroit tru trac,

  2. #2
    Join Date
    Jul 2008
    Location
    san marcos,tx
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    149
    SAE 75W-90 Synthetic Axle Lubricant , not sure if you need to run any friction modifier in since its not limited slip.

  3. #3
    Join Date
    Jun 2007
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    saratoga springs ,new york {upstate ,adirondacks }
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    my eaton said dont use synthetic,but to use 75-90 with friction modifier.tru trac is owned by eaton,so im thinking could be the same.
    mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .

  4. #4
    Join Date
    May 2007
    Location
    Prairieville, La
    Posts
    11
    eaton also says not to use synthetic or any modifier with the tru-trac. a few guys on performancetrucks.net had there's only pulling one wheel. took the synthetic out after a call to eaton and that solved the problem.
    04 GMC Crew Cab 6.0 TR224 3000 Yank Pacesetters W/ ORY TBSS Intake UDP CAI Blackbear Tuned

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