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  1. G

    Axle vent tube gear oil coming out

    The usual surplus suspects for the seals and shim kit. To properly torque the spindle nut you need a rather oddball socket - 3-7/8" Eight Point extra deep - that really isn't available to buy since it's made special for the military by OTC...
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    Axle vent tube gear oil coming out

    The CTIS seals rotate on the spindle and simply cycling the CTIS while stationary is not a sufficient test. Pull the banjo bolts for the CTIS valve off the wheel stud and smell for gear oil. Have you done a wheel bearing service? The inner wheel bearings are supposed to be repacked, torqued...
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    Trigger warning! Fluid question

    Yeah that's possible. I would guess that any 15w40 would be fine. It's not like the transmission is dealing with combustion products.
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    Trigger warning! Fluid question

    I wouldn't. The military currently uses 15w40 in trucks that were shipped with it. Newer trucks are shipping with ATF (these are all Allison 3700SP transmissions not the older 3070SP) and the Army is servicing these with synthetic Dex IV. From what I can tell the Toyota T-IV is only equivalent...
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    M1078a1 total operating cost per mile?

    Initial costs after purchase or ongoing costs once everything is sorted out? Initial costs can be absolutely enormous. Often eclipsing the cost of the truck itself (for example if you want BRAND NEW tires @ $10,000 - $14,000 from Goodyear depending on LMTV/MTV). It really depends on which...
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    New M1078 owner, newbie question re: Transmission Shift Display

    That is correct. The display indicates the highest available range. Operators Manual: https://www.velocityvehiclegroup.com/themes/vvgmain/assets/Source/PartDocument/634032110217182705.pdf
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    Gen 2 air conditioning install with C7 A1R - notes and pictures thus far.

    Had a chance to try out the system today with temps spontaneously soaring to 90 degrees out of nowhere. Performance was excellent - within about 15 minutes of starting my drive the interior surfaces of the (non insulated) cab were cool to the touch and temps were quite comfortable. No one...
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    M1088A1 rear brake gauge

    If this happens to be an A1R then it's likely the MMDC pressure transducer (common problem) but since you say you replaced a Sensor I'm guessing you have the discreet gauges.
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    Cab Tilt Pump M1078 A1

    leaking from where? It is considered normal for these to release an aerosol from the vent of MIL-PRF-5606 when in operation. That said it's pretty straightforward. Use a large vise if you have one big enough to put the pump in when disassembling and reassembling. Or could probably use a bar...
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    Bed Side Panel Storage M1078 A1

    You can see Dave Anderson pulling the panels out of his stowage boxes at 6:38 in this video:
  11. G

    ECO DIRECT DRIVE HUBS

    These are amazing. See my review in the discussion forum thread: https://www.steelsoldiers.com/threads/eco-hubs-who-needs-3-07-gears.213516/page-8#post-2509659
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    ECO Hubs Who needs 3:07 gears?

    Beyond like. This is an absolute game changer. This changes everything. It rolls back the cost of driving these to pre-pandemic cost levels. 32% increase in fuel economy. That's absolutely HUGE in the world of fuel economy gains. Mind = Blown. 🤯
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    ECO Hubs Who needs 3:07 gears?

    Ok back from the mileage test run. Conditions were: 53 degrees (F) Interstate 5 from the Aurora Flying-J Truck Stop RV pump #26 to center of town in Lebanon Oregon, and back. 118 miles round trip. Both vehicles used the same pump (same ground angle) before and after the test run and both were...
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    ECO Hubs Who needs 3:07 gears?

    I am on a 112 mile round trip (at the halfway point now eating lunch) with my friends 2003 M1078 A1 following right now. We both filled out tanks at the same pump to the same level and will do so again at the end of the test. His truck is screaming to keep up with me at 56-57 mph and cycling the...
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    ECO Hubs Who needs 3:07 gears?

    The whole drivetrain, especially the engine, really feels like it's a lot happier not screaming at redline. My radiator fan kicked on once last night and it was much quieter and ran for less than a minute before cycling off. After doing 80 mph on the freeway the hubs were still cold to the...
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    ECO Hubs Who needs 3:07 gears?

    Installed! Ok so as expected these hubs are total game changers. With my C7 uprated to 370/931 I honesty don't notice a significant difference in acceleration but the whole experience is smoother without the reduction hubs. If anything I think it's faster off the line but I haven't corrected...
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    Check engine light comes on when fan off switch is enabled

    Apple's walled garden software ecosystem and anti right-to-repair practices I find particularly insulting. At least on the PC side you can choose to run whatever software you want including other operating systems and no one is going to disable hardware features or prevent you from using non-OEM...
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    Check engine light comes on when fan off switch is enabled

    Very familiar with both. Lived that whole era in the industry. Regardless - CAT ET doesn't run on anything but windows 🤷‍♂️
  19. G

    Check engine light comes on when fan off switch is enabled

    I've never heard of that. You might consult the wiring diagrams and see if you can discern any interaction. If you own one of these and you desire/plan to troubleshoot and repair it yourself then you need to get the proper tools. And IMHO the disembodied hand of Steve Job's ghost can stay the F...
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    Check engine light comes on when fan off switch is enabled

    You need to hook up CAT ET with a laptop and see what the code is when you hit the switch.
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