Transmission getting to hot?

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  #1  
Old 05-02-06, 08:30 PM
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Transmission getting to hot?

I recently bought a truck that has a pro built turbo 350 with 3500 stall, fully manual valve body. The temp sometimes reaches around 210 on the trans gauge, but the transmission fluid level seems to be ok. Is the 210 temp something to worry about? Thanks.
 
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Old 05-02-06, 08:58 PM
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Originally Posted by craigg
I recently bought a truck that has a pro built turbo 350 with 3500 stall, fully manual valve body. The temp sometimes reaches around 210 on the trans gauge, but the transmission fluid level seems to be ok. Is the 210 temp something to worry about? Thanks.



We have a 2500 Suburban with the tranny temp gauge on dashboard, it always stays at about 160 , the 210 mark is still within normal temp operating conditions so is it's only sometimes maybe when you're towing uphill or so I wouldn't worry about it, read your owner's manual.
 
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Old 05-02-06, 09:29 PM
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At normal operating temperature of around 170 degrees Fahrenheit , non-synthetic automatic transmission fluid will last about 100,000 miles before it begins to oxidize. As the temperature of the fluid rises, the rate of oxidation doubles and the life expectancy of the fluid is reduced by one half with each 20 degree increase in temperature.

In general:
Temperature Fluid Life Expectancy, in Miles
175 F 100,000
195 F 50,000
212 F 25,000
235 F 12,000
255 F 6,250
275 F 3,000
295 F 1,500
315 F 750
335 F 325
355 F 160
375 F 80
390 F 40
415 F Less than 1/2 hour

Lou's right in that if it's an occasional thing up hill or towing it's not a big deal
If it's often it may warrant further investigation

If it's a turbo, I'd think it would have a tranny cooler
If it doesn't, I'd look into it
 
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Old 05-03-06, 07:31 AM
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Exclamation

flush and clean out your radiator, then change the transmission fluid and filter when you fill your radiator back up put some anti-freeze in it too, it dont heat up as fast as water does, also check all the hoses on the radiator and the colling hoses on the transmission for leaks or disconnections, check the radiator for leaks also. none of this can hurt and it might fix your problem i recommend it. but then again your thermostat might be going out. good luck
 
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Old 05-03-06, 07:55 AM
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Anytime you are driving your vehicle and the RPM is below the stall speed of your converter, you are generating extra heat because of the inefficiency of the converter. If you are over the stall speed then you will generate heat that would be close to what you would get if you had a stock converter. Heat is your enemy! You may want to consider an auxillary trans cooler and consider the use of a synthetic transmission fluid which is much more resistant to heat. Pay close attention to the chart previously posted because fluid life is seriously affected by temperature. If your temp is around 210 degrees, use the chart to determine when to change your fluid
 
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Old 05-03-06, 08:59 AM
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Thanks for the info guys.
 
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