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My doubler seems excessively hot.

Discussion in 'OffRoad Design' started by TopOff, Aug 4, 2002.

  1. TopOff

    TopOff 1/2 ton status

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    Can anyone confirm or deny...

    My SM465 = ~145 degrees F after a freeway run (~25 miles).

    My 203 range box = ~140 degrees F

    My doubler (aluminum) = 210 degrees F

    My 205 rang box = ~140 degrees F

    I am using a 1 - 5 inch range infra-red heat probe. The same thing I use to check the heat on my tires when racing (on-road car).

    Can anyone confirm or deny if they experience the same thing?

    I am wondering if I F*-ed up the install...

    I presume the bearing is getting EXCESSIVELY HOT!!!

    I tried SLINGING the oil with the 205 in neutral and the 203 in low and going through the gears... This doesn't seem to have helped much.

    I also used grease on the bearing INSIDE the doubler. I didn't use a lot, as I figured the 80/90 weight oil will get their when I start driving.

    TIA
     
  2. 70~K5

    70~K5 1/2 ton status

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    I don't know about your setup but I know the trans in my pete runs between 150-185 and have seen it get up to 205. This is off a trans temp gauge with a sender in the trans case. We run 50w non detergent as spec in the 15spd roadranger.
     
  3. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Send me the doubler.......I'll check it out for you!

    /forums/images/icons/grin.gif





    Sorry, no serious ideas for you.
     
  4. Chaz88K5

    Chaz88K5 1/2 ton status

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    sounds to me that the alum is absorbing alot of the heat...alum disapaes heat quicker than steel...so maybe its just doin that...but other than that i dont have a clue... /forums/images/icons/crazy.gif /forums/images/icons/confused.gif
     
  5. Blazer1970

    Blazer1970 1/2 ton status

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    Infrared heat probes are affected by the emissivity of the object they are aimed at. That would explain the difference between the readings from the transfer cases (cast iron) and the doubler (aluminum) parts.
     
  6. TopOff

    TopOff 1/2 ton status

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    That sounds good, except, my hand tells me the same thing. That same thing is the aluminum is quite a bit hotter!

    Oh well, I suppose I should run it until it pops up through the floor boards... /forums/images/icons/crazy.gif
     
  7. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Dude I will TOTALLY check it out for you....

    But you gotta ship it to me quick 'cuz Moab is only 16 days from now..... /forums/images/icons/grin.gif
     
  8. TopOff

    TopOff 1/2 ton status

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    Don't you have a motor to build or something???

    I'll tell you what.. I'll trade you my doubler for your Dana 60 and cross-over! /forums/images/icons/grin.gif
     
  9. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    HEY!

    You're not supposed to counter-offer me!....Besides, that would be too "fair" of a trade. I'll tell you what, you can have my 8-Lug D44 and my bucket of leftover rusty bolts and washers (close to 5 Lbs worth!)

    Deal!??? /forums/images/icons/wink.gif
     
  10. TopOff

    TopOff 1/2 ton status

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    Ohh ok.. so you gonna' through in the Dana 60 AND the Dana 44 with the bolts!!!

    DEAL! /forums/images/icons/cool.gif
     
  11. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    Damn you're greedy.......!

    If you want both axles, I'm keeping the bolts & washers /forums/images/icons/grin.gif /forums/images/icons/grin.gif /forums/images/icons/grin.gif




    mesofunny
     
  12. TopOff

    TopOff 1/2 ton status

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    DEAL!
     
  13. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    There might be some problems with the probe on the really shiny alum compared to the cast surface of the iron cases. It could account for some of the difference. Is there anything in your instructions for the temp gun that would give you a correction factor for the surface condition?

    It really only takes about a teaspoon of oil to lube that bearing for a decent period of time so it's not like it needs an oil bath to be happy so if you greased it on installation you should be fine that way.

    All the other stuff aside, the alum. can't get hotter than the temperature of something near it. So if it's really over 200 degrees (kind of doubt it due to possible measuring desrepancies) there must be something there over 200 degrees. Question for me is why aren't the other two boxes that hot. Maybe they're being cooled by the circulation of the oil where the adapter that sees very little oil flow is not being cooled?

    That's about all I can figure out here, maybe try painting the AL black in one place to see if you get different temps. And then run it. Even 200 degrees is a long way from melt down.
     
  14. TopOff

    TopOff 1/2 ton status

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    Stephen,

    I would guess the same thing, except, there when I put my hand on it, teh AL is noticeably warmer (hot really) to the touch, whereas the two range boxes are cooler.

    Just wondering if I F'ed up... /forums/images/icons/tongue.gif

    I will try and fill the 203 with more oil... and see what I get for temps.

    I suppose it could also be a "break-in" period for the old bearing on the new shaft???
     

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