• Welcome to The Truck Stop! We see you haven't REGISTERED yet.

    Your truck knowledge is missing!
    • Registration is FREE , all we need is your birthday and email. (We don't share ANY data with ANYONE)
    • We have tons of knowledge here for your diesel truck!
    • Post your own topics and reply to existing threads to help others out!
    • NO ADS! The site is fully functional and ad free!
    CLICK HERE TO REGISTER!

    Problems registering? Click here to contact us!

    Already registered, but need a PASSWORD RESET? CLICK HERE TO RESET YOUR PASSWORD!

Help with 4l80e

S

strictlydiesel

New Member
Messages
7
Reaction score
0
Hey everyone,
this is my first post here @ the truck stop but I'm a convert from the other site. I've recently been having overheating issues with my 4l80e. It was fine up until I pulled the air damn insert that is located in the bumper. the question I have is did that piece of plastic really do that much to get air flow to the cooler? and if not what could be causing my trans to start running hot and overheating. I had the fluid changed back in February because it was well over the 30k change point and assumed that was a big reason for the start of it running warm but did nothing to help it out. im looking at replacing my stock aux trans cooler with a b&m cooler mounted with an electric fan to bring temps back down and also adding a deep trans pan for more fluid capacity. any and all help would be greatly appreciated.
 
well my temp sender isnt in the pan, its in the side where the pressure plug was so im expecting higher than what the gauge reads but its runnin above 200 on the gauge just daily driving. The other day it got darn near up to 260. normal before then was well under 200, prob 170s/180s on the gauge.
 
ak diesel driver said:
so put the air dam back in and see if it goes back to original temps
Click to expand...

its gone, its been gone for awhile. i think it got trashed when we cleaned out the garage. otherwise i wouldve. well that and my intercooler is up where the air dam was. i have some landfill liner that i used to fashion up a similar air dam. but it didnt did the air damn even make that big a difference. where did it direct air to if it was that big a deal.



just a number said:
have you done anything to the transmission ex. shift kit, TC lockup, ect.? any other issues with it?
Click to expand...

nope bone stock minus a b&m electronic shift improver.
 
im not sure if the converter is locking up. how would i go about checking that? and pardon my trans illiteracy but what is a cts?
 
It's the temp sending unit in the tstat housing. Lock up occurs at 170* engine temp. This isn't the same sending unit that the guage in the dash uses. Lock up usually occurs around 48-52 mph lightly loaded. should drop a few hunderd rpms.
 
my rpms drop to about 1700 in od right after shift around 48mph. when cruising @ 60 i hover around 2000-2100rpms. how would i know if the tc is locked or not?
 
count your shifts 4 gears plus lock up. 3rd gear will also lock up. sounds to me by your rpms that it is locking
 
i checked to see if there was crap between all the coolers and blew out whatever had accumulated w/ an air compressor. this is why im baffled. did the air dam really make that much of a difference in cooling or air diversion to the coolers? the engine temp is normal everything else is normal just the trans temp increased when i removed that air dam.
 
My airdam is gone too since engine rebuild,tranny temps are usually around 130-160 pulling a trailer or not.
might be a circulation problem in yours,Plugged cooler or pinced line?
 
i didnt think that air dam did much of anything. i guess ill have to get up under the truck and take a peak to see if its a pinched line or something along those lines. i appreciate all the input yall. im lookin @ getting the b&m fluid cooler w/ the small electric fan and replacing the one i have currently. dunno when ill get it but hopefully thatll help with temps.
 
You must log in or register to reply here.
Back
Top