What is an acceptable trans temp for built 4L80e?
What is an acceptable trans temp for built 4L80e? Finally got my car running and have been monitoring the transmission temps of my built 4L80e. It takes awhile to get up to a measurable temperature, but it's generally around 140*, unless I do a lot of stop & go city driving, I've seen it get as high as 160* to maybe *165 when I've on the throttle and city driving on a warm day.
I have a 11x14 B&M plate style transmission cooler sitting behind my intercooler, attached to my AC condenser/radiator, with stock fbody puller fans.
Putting down ~ 650 RWHP
I haven't had a trans temp gauge in any car of mine recently so I don't really know what "normal" would be with this configuration. Or if my sending unit is reading accurately...but I have no reason to expect otherwise.
I have a 11x14 B&M plate style transmission cooler sitting behind my intercooler, attached to my AC condenser/radiator, with stock fbody puller fans.
Putting down ~ 650 RWHP
I haven't had a trans temp gauge in any car of mine recently so I don't really know what "normal" would be with this configuration. Or if my sending unit is reading accurately...but I have no reason to expect otherwise.
Teching In
Joined: Apr 2013
Posts: 43
Likes: 0
140 is good. 165 is getting warm but okay. 180 is when I start to worry.
FWIW: I run about 30' hotter when running a 3:08 (highway) rear compared to my 4:10 (strip) rear (10 converter). So if you are running a taller rear, it would explain why your temps are higher than it could be.
FWIW: I run about 30' hotter when running a 3:08 (highway) rear compared to my 4:10 (strip) rear (10 converter). So if you are running a taller rear, it would explain why your temps are higher than it could be.
I'm running 3.42's in the stock 10 bolt. I don't think it's gone much above 160 but my trans temp gauge reads 100, 150, then 180. The warmest I've seen it get is ~1/2 way between 150 and 180 so I'm assuming that's about 165*. Once I'm moving again, it drops a bit.
I guess I could always try adding a fan to the cooler to see if it helps. It's been mid-upper 80's here but will get in upper 90's this summer when I'd be driving it.
I guess I could always try adding a fan to the cooler to see if it helps. It's been mid-upper 80's here but will get in upper 90's this summer when I'd be driving it.
TECH Enthusiast
Joined: Jul 2008
Posts: 577
Likes: 1
From: League City, Tx
Your temps are perfect. Anything under 200* is acceptable...
My brand new Ecoboost truck's tranny runs 192-195* all of the time... Only once have a seen 202* and that was towing 5000lbs.
I think 160-180* is perfect.
My brand new Ecoboost truck's tranny runs 192-195* all of the time... Only once have a seen 202* and that was towing 5000lbs.
I think 160-180* is perfect.
I have a remote cooler with a 180 degree T stat in it. Do you guys think that is to high a temp for the fan to start? I live in a very hot climate so I'm a little worried about it.
I need to log trans temp next time I get the car out but this thread gives me a idea of temps to look for.
I need to log trans temp next time I get the car out but this thread gives me a idea of temps to look for.
Trending Topics
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
Stock transmissions run 200+ daily in summertime heat, hell their fluid is routed through the radiator which acts as a warmer until the fluid has reached the same temp as the coolant, which is 200+ is most vehicles. These transmissions can last 2-300k under these conditions. However, I don't care for my transmission to get over 200. The fluid has not broken down at that temp but that is just my preference. My cooling system is a B+M plate and big braided lines with AN fittings and a dedicated fan and it is mounted in the front bumper. My temps stay 140-160 even during the summer. Friday at the track they reached 180-190 or so after hot lapping the car.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Stock transmissions run 200+ daily in summertime heat, hell their fluid is routed through the radiator which acts as a warmer until the fluid has reached the same temp as the coolant, which is 200+ is most vehicles. These transmissions can last 2-300k under these conditions. However, I don't care for my transmission to get over 200. The fluid has not broken down at that temp but that is just my preference. My cooling system is a B+M plate and big braided lines with AN fittings and a dedicated fan and it is mounted in the front bumper. My temps stay 140-160 even during the summer. Friday at the track they reached 180-190 or so after hot lapping the car.
I found a pid in my HPtuners to log the temp but I haven't tried it yet.
Much over 200 and its time to think about additional cooling however if you beating it hard or have a stall and around town temps may get that high and higher for short times intermitantly and this will not cause and issue. Certanly if you are seeing temps continuous over 200 andor any temps over 220 you need more cooling. I deally i like average temp to be under 180 140 to 160 ideal though in some really hot climates its may not be feasable to stay that low or possible. Sounds like so far your temps are just fine.
__________________
