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Old 09-10-2008
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Hot trans

So I just got a scangauge installed on the truck and according to it the trans is getting pretty hot, just drove it a little and the highest it got was 189* but that wasn't a very far drive at all. I'm guessing because I've got 3.73's and 33's it is helping to heat it up a little but it still seems kind of high. I have no idea if the fluid has ever been flushed before since I'm the 3rd owner, but the truck has got 62k on it. Think I should flush the trans? When I back up if I don't come to a full stop and then put it in drive the truck revs a little high and then sort of almost bangs into gear also, but I'm guessing that's the slip yoke in need of greasing.
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Old 09-10-2008
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Dang mine sits at 140-150, highest I've seen it is 160.
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Old 09-10-2008
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Mines usually about 150-160 under normal conditions. Two weekends ago it was 95 degrees out with high humidity, I pulled a car tailer around town with about 4,500 lbs of sod on it and the hottest it ever got was 190. Thats was at low speeds under 40mph with plenty of hills....
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Old 09-11-2008
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Hey korey like I said, the highest I see normally towing is 180, and thats if it's shifting gears or accellerating uphill upwind for a while. Usually towing I see 165. Normal city driving I'm never above 150.

It's the gears...bc when I had 3.73 and 33's, mine was the same.


Offroading mine would get to 180 pretty quick, and 200 was not uncommon, but thats offroading...you drove on the street!!
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Old 09-11-2008
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Ok, how do you get the scan gauge to show trans temp?
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Old 09-11-2008
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Mine runs about 180ish. what is optimal? I dont wanna damage my transmission! btw, Ive got 3.73's turning 33"s
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Old 09-11-2008
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I know i'm not an auto, but i think i can sorta help...


Do you have a trans cooler? Maybe it's time to upgrade to a cooler, or even upgrade to a better cooler with an electric fan blowing on it.

IMO, see if you can find an 8.8" w/ 4.10's. That should help the strain on the trans and be cheaper than a gear swap.
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Old 09-11-2008
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Id like to know more about this also, although i run 32's...
Doesnt all the Autos have a trans cooler?
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Old 09-11-2008
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I run 3.55 gears with 30's and the highest I got was a tad under 160, and that was pushing my truck, reving in the high 2000's for 100km straight. In the city I stay around 150/155. I got the factory aux trans cooler though, do you?
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Old 09-11-2008
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Quote:
Originally Posted by Fx4wannabe01 View Post
I know i'm not an auto, but i think i can sorta help...


Do you have a trans cooler? Maybe it's time to upgrade to a cooler, or even upgrade to a better cooler with an electric fan blowing on it.

IMO, see if you can find an 8.8" w/ 4.10's. That should help the strain on the trans and be cheaper than a gear swap.

too many trans coolers can also slow the flow of the fluid, which will make it run hot.

mine is around 155 all the time now with the winch in front.

Try to get it flushed asap
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Old 09-11-2008
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Thank's guys. I thought it was because of my gears, just double checking. But I'm still going to flush it soon.

Ace, it's not a ScanGuageII. I'll have plenty of info on it soon =].
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Old 09-11-2008
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Quote:
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Ok, how do you get the scan gauge to show trans temp?
You have to use a Xgauge, you can find it on Scangauges website.
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Old 09-11-2008
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Quote:
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You have to use a Xgauge, you can find it on Scangauges website.
ditto. x gauge is a programmable function of the scan gauge II. It takes about 5 minutes to do it.
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Old 09-11-2008
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Quote:
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You have to use a Xgauge, you can find it on Scangauges website.
thanks
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Old 09-11-2008
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Anyone who is wondering why their trans runs hot...it's your gears.

Keith, 180 is HOT, I don't see that towing a trailer...

Once you get 4.10's it will be fine though, anytime your undergeared, your trans will run hot. I'm a little overgeared, so mine runs even cooler which is a huge plus for me. I've had 4 servos go out, 1 trans, 1 tq converter, and the clutch bands...my truck was in/out of the shop for a solid 6 months...it was terrible.
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Old 09-11-2008
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Mine runs around 160-170 unless I'm towing. Then it runs 190-200, depending what and where I'm pulling. My aux cooler fan will bring it back down to about 170-180.
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