auto tranny temps vs. gearing vs. tire size
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auto tranny temps vs. gearing vs. tire size
I am running the 3:73's with 35 inch tires. On the highway around 70 mph, I am seeing temps pushing the 200 mark even with a cooler installed The hottest I can get it offroad on a nasty slow muddy, rocky uphill is about 160.. I am hoping to do the 5:13's soon. Just a word of warning for the guys running big tires and stock gears who don't have a temp gauge. If it wasn't for the temps, I'd be fine with the gearing..
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What are your rpms at? I dont have a cooler or a guage but i reprogramed the shift points so with the stock 3.73s at 70 mph im only at 2500 rpm with over drive off with o/d on im at 1700
#7
JK Junkie
"conventional wisdom" says that ATF will last 100k miles at 175 degrees; every increase of 20 deg. cuts the lifetime in half. e.g. at 195 you get 50k miles; at 215 its good for 25k.
Is that true for every brand ATF etc. etc.? beats me.
I have an aeroforce interceptor gauge which plugs into the OBD port. One of the functions is tranny temp.
Before adding an aux cooler I would see temps as high as 195 deg just driving in the city stop/go traffic. No extra weight, just a stock 2-dr Rubi.
Since adding the cooler I have yet to go over 165 deg, even climbing long steep mountains.
Is that true for every brand ATF etc. etc.? beats me.
I have an aeroforce interceptor gauge which plugs into the OBD port. One of the functions is tranny temp.
Before adding an aux cooler I would see temps as high as 195 deg just driving in the city stop/go traffic. No extra weight, just a stock 2-dr Rubi.
Since adding the cooler I have yet to go over 165 deg, even climbing long steep mountains.
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#8
JK Jedi Master
"conventional wisdom" says that ATF will last 100k miles at 175 degrees; every increase of 20 deg. cuts the lifetime in half. e.g. at 195 you get 50k miles; at 215 its good for 25k.
Is that true for every brand ATF etc. etc.? beats me.
I have an aeroforce interceptor gauge which plugs into the OBD port. One of the functions is tranny temp.
Before adding an aux cooler I would see temps as high as 195 deg just driving in the city stop/go traffic. No extra weight, just a stock 2-dr Rubi.
Since adding the cooler I have yet to go over 165 deg, even climbing long steep mountains.
Is that true for every brand ATF etc. etc.? beats me.
I have an aeroforce interceptor gauge which plugs into the OBD port. One of the functions is tranny temp.
Before adding an aux cooler I would see temps as high as 195 deg just driving in the city stop/go traffic. No extra weight, just a stock 2-dr Rubi.
Since adding the cooler I have yet to go over 165 deg, even climbing long steep mountains.
When I drive as described by Jiblet above, my tranny temp is in the 115 to 130 range, even on a hot day. I don't have an aux cooler, either.
#9
JK Super Freak
I am running the 3:73's with 35 inch tires. On the highway around 70 mph, I am seeing temps pushing the 200 mark even with a cooler installed The hottest I can get it offroad on a nasty slow muddy, rocky uphill is about 160.. I am hoping to do the 5:13's soon. Just a word of warning for the guys running big tires and stock gears who don't have a temp gauge. If it wasn't for the temps, I'd be fine with the gearing..
#10
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I am running the aeroforce interceptor gauge...