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Old 08-01-2008, 11:12 AM
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4R100 Issue

This actually happened a while ago but ive got some time to fix it now. Anyway, i was towing a trailer and stopped to do a manual trans temp gauge (pull the dipstick out and grab it and see what degree burns i get and touch the trans pan) and it was leakin fluid from the front of the tranny where the TC is, it was dripping out the little drain hole in it. It was dripping at least one drop per second so pretty significant. I was in Georgia so i threw some stop leak in it which stopped the leak and drove home.

Any ideas of what caused the leak? I was thinkin the front seal or the pump seal. Thanks ahead of time for the help.
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Old 08-01-2008, 11:34 AM
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overheating the trans and puking fluid out the front pump seal. I've read somewhere that the aftermarket pump seals don't do that but not sure what brand. just let it cool and top off the fluid level.
May wanna install a 6.0 trans cooler, should help
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Old 08-01-2008, 11:47 AM
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So should i replace the front seal?
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Old 08-01-2008, 12:41 PM
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if it keeps puking fluid every time you tow, Yes.
I'd install a bigger trans cooler and see how it does next time you tow. My truck did it once, after that I would just keep an eye on the trans temp gauge and pull over when temps started getting high.
I believe the 6.0 trans cooler would help you qiute a bit, they're twice as big as the stock 7.3 cooler
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Old 08-01-2008, 01:27 PM
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Quote:
Originally Posted by sikktruk01 View Post
if it keeps puking fluid every time you tow, Yes.
I'd install a bigger trans cooler and see how it does next time you tow. My truck did it once, after that I would just keep an eye on the trans temp gauge and pull over when temps started getting high.
I believe the 6.0 trans cooler would help you qiute a bit, they're twice as big as the stock 7.3 cooler
Well ive towed since then, just not that heavy of a load and not under that severe of conditions, but ive got gauges now and i didn't then. I've considered putting a 6.0 trans cooler and even an intercooler but i just havent had the funds. What would be the highest trans temp i should allow?
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Old 08-03-2008, 02:53 PM
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Old 08-03-2008, 03:30 PM
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I would say anything over 235-240 is getting into the danger zone.
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