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Automatic oil temp?

Discussion in 'OffRoad Design' started by snowtoy, Sep 20, 2001.

  1. snowtoy

    snowtoy Registered Member

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    What is normal temp on transmoission fluid in a TH350?
    Mine is almost 100 farenheit
     
  2. Stephen

    Stephen 1/2 ton status Moderator Vendor

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    you shouldn't operate over about 220, ATF starts to break down. You can get synthetic ATF that's good to higher temps, for a little magin for error. I take the temp of the trans out line so I test the hottest oil, or what should be the hottest oil. I figure if I shut down when it's 220, the rest will be happy.

    Making the world better, one truck at a time.
    SW-ORD
    <a target="_blank" href=http://www.offroaddesign.com>www.offroaddesign.com</a>
     
  3. AgDieseler

    AgDieseler Certified Scrap Producer Premium Member GMOTM Winner

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    Ideal tranny temp is anywhere from 160F to 200F, however 220F is still plenty safe. The GM shop manual says that 150F-250F is the designed operating range for their automatics. Beyond 250F, seals start to embrittle and harden. Things obviously just get worse form there. B&amp;M suggests using their temp sending unit in the upper oil return line (TH700R4). From that, I see temps as high as 210F on a hot Texas uphill climb, but sit at 160F or so for most running around. All this is based on petroleum ATF. With 30,000 mile drain intervals, full synthetic is pretty cheap insurance. As a side note, when behind the Duramax diesel, the new Allison 5-speed automatic sits steadily at 190F no matter what the conditions.

    David Oliver
    '85 'burban
    B&B 6.2L J NA
    T-700
    5.5"lift, 35"BFGs
    *Banks Turbo coming soon*
     
  4. jarheadk5

    jarheadk5 1/2 ton status

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    GM probably got wise (for once) and put a thermostatic valve in the trans cooler...


    September 11, 2001--"A date which will live in infamy"
     
  5. jbissette

    jbissette 1/2 ton status

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    Where is the best place to put a temperature sended for you auto trans at? In the pan, or in the line going to the cooler?

    88 Chevy K1500, 350 TBI, TH700R4, 3" body lift, 33x12.50x15 Tires
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    There's a few different schools of thought on this. I put mine right in the temperature port on my 700. You'll see a plug on the driver's side above the shifter. I did this because I did not have to drill into the pan or splice into the cooler line (sources of POSSIBLE leaks). If done correctly though the pan or cooler line that goes OUT to the cooler are both good places to put a sender too.

    See my rig at <a target="_blank" href=http://coloradok5.com/gallery/Leadfoot>http://coloradok5.com/gallery/Leadfoot</a>
     
  7. jbissette

    jbissette 1/2 ton status

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    Is the temperature port a standard size temperature sender? Or do I need a special sender?

    88 Chevy K1500, 350 TBI, TH700R4, 3" body lift, 33x12.50x15 Tires
     
  8. slider

    slider 1/2 ton status

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    Summit, B&amp;M and Permacool all make a secondary filter, that uses a screw on filter that has a plug for a temp sender already in the housing.. All you do is put the filter in line with the oil cooler. Permacool and the B&amp;M system sell them complete with a gage. I bought the Summit system and bought a Autometer gage. You now know your temp and the fluid is getting a real filter at the same time. It is a slick system.
     
  9. Hossbaby50

    Hossbaby50 3/4 ton status

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    How much did it run you? how much was the gauge? Thanks

    My Chevy isn't broken, its just out of gas.
     
  10. slider

    slider 1/2 ton status

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    perma cool filter with gage p/n prm-10677 is 79.95 The summit remote kit without gage p/n sum-g4980 is 28.69
    B&amp;M has a gage p/n bmm-80212 for 46.95. I cannot rember exactly what I paid for the Auto Meter gage I bought but it was around 40.00. Hope this helps, all part numbers are from Summits catalog
     
  11. Hossbaby50

    Hossbaby50 3/4 ton status

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    Thanks for the info.

    Harley

    My Chevy isn't broken, its just out of gas.
     
  12. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    Well, the one I bought from Dakota Digital came with the correct size sender for the port (I think 1/8" NPT).
    http://coloradok5.com/gallery/Leadfoot
     

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