craigsix

im getting a trans cooler put in my 2012 5.3 6l80 truck. should i go inline with the radiator for more capacity or bypass it. also i saw 183 degree trans temp last week on a hot day and a lot of driving. ive got a 3000 stall 278mm circle d with 4.10 gears. is that a dangerous temperature or should i not freak out too much. any body else with a 6speed seen these temps on hot summer days. i saw it in the 170s when it was brand new with stock stall and 3.42s. any help or advice would be appreciated.

ak2007r6

iTrader: (1)

Bypass
183 is fine, but I wouldn't want to beat on it to much with those temps.

Should be a big improvement once cooler is installed

TIM Z

iTrader: (12)

I've seen 167* here on a 91* Day in my Denali. I'm going to be upgrading to a tru-cool very soon.

I only see about 150 in my blown truck with my tru-cool.

oakley6575

iTrader: (5)

180 is perfectly fine for driving on it for a long time. GM would tell you that is perfect. I like to run a bit cooler than that but with my 40K the highest ive ever seen it was 150 on a 110* day after getting on the freeway. It usually sits around 135 which is low IMO. 220* and I would start getting worried

charcoal03silvy

iTrader: (1)

I run mine just through the cooler, bypassing the radiator... Had the radiator fail and fluid mixed which equals BAD BAD BAD for clutches. Total rebuild of transmission with new clutches and cut/cleaned converter.

RacinRust

My 6.2 was running 190+ last year at Pikes Peak. 80* air temp at bottom and 45* air temp at top. The trans never cooled down until we got back on the hiway headed back to Colorado Springs. Have installed a 40K cooler and bypassed the radiator. Have noticed about 10 to 15 degrees cooler here in DFW on 95* days. Will be back on the mountain July 1st through the 5th in a couple of weeks. Should be a good comparison.

Vortec350ss

iTrader: (20)

I would think the lines run through the radiator to help it get to temp quicker when it's really cold... Maybe I'm wrong though. I just assume that the engine coolant is hotter than the tranny fluid 9 times out of 10 and probably heats up faster too.

In cold weather climates that could be important... But down south I'd bypass it.

ak2007r6

iTrader: (1)

It's designed to heat the fluid up in cold weather like you mentioned but it's not needed. I know multiple trucks up here in Alaska running them that are bypassed and no one issue, including mine. When it's -20 outside anyways you let the truck warm up and easy through the gears anyways before driving like a maniac LOL

AKlowriderZ71

iTrader: (22)

Yours runs through the radiator, then the 40k.

ak2007r6

iTrader: (1)

I'm so confused...... could have swore you told me differently when we were talking about it.