Just how bullet proof are 4l80's?

[pictureperfectlawns]

I knock on wood when I say this, but wanted to share my experience. I have a 2000 Silverado 2500. This truck has the 4l80 and I currently have 349,000 miles on her. I've put one engine in her (my fault.) I was changing a part and reinstalled the oil cooler line to the radiator without it clamping in completely. It came out, dropped the oil, and caused engine knocking after it ran dry. Other then that I've only replaced wear and tear parts on this truck. I lost the first engine at (300k) again, my fault. The engine would still be running today. I've pulled equipment and trailers every day with this truck over 300,000 miles. I eventually had issues with transmission overheating from over-working the transmission. (I was pulling a heavy loaded down dump trailer (13,000 lbs! on a daily basis.) When I would pull through the hilly areas of austin, the transmission would overheat. I installed a cooler and she's been great sense. This past week, I had transmission fluid blowing out when I pulled up to the house. Tracked it down to a pinhole in the transmission lines. Patched it up. Filled her back up with fluids and shifts as good as new. This transmission has been beaten, bruised, and abused for 350,000 miles. Many of those miles pulling a loaded and unloaded 8,000 lb. dump trailer. I give two thumbs up to Chevy on the 4l80's.

[dasimmon]

Man that's awesome. Nothin better than reliability!!

[Raptordude]

Nice! Makes me feel better about my 2001 with the 80e. It was used to pull a 5th wheel camper by my grandpa (previous owner) BUT when he towed he left it in 3rd gear all the time, even on the highway. (He said he would cruise at 50mph haha, not many people have that kind of patience) but I've heard that's the strongest gear to tow in. And he also kept after fluid services. It only has 115,000 right now, I bought it with 108,000......let's hope she goes as long as yours!

 

From what I've heard, the 2000 model 80e isn't even as good as the later ones, particularly the reverse band. So that gives it even more credibility!

 

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[ZackC]

My 4l80in my 02 gm is holding up amazing. 5years of a serious ass whopping and all I've done is check the fluid by this fall I will give it a flush. The lq4 and 4l80 was a good send for me!

[SpartanAutoworx]

4L80E is rock solid but as stated above early 00 modles drop reverse.

[millersscaledart]

I knock on wood when I say this, but wanted to share my experience. I have a 2000 Silverado 2500. This truck has the 4l80 and I currently have 349,000 miles on her. I've put one engine in her (my fault.) I was changing a part and reinstalled the oil cooler line to the radiator without it clamping in completely. It came out, dropped the oil, and caused engine knocking after it ran dry. Other then that I've only replaced wear and tear parts on this truck. I lost the first engine at (300k) again, my fault. The engine would still be running today. I've pulled equipment and trailers every day with this truck over 300,000 miles. I eventually had issues with transmission overheating from over-working the transmission. (I was pulling a heavy loaded down dump trailer (13,000 lbs! on a daily basis.) When I would pull through the hilly areas of austin, the transmission would overheat. I installed a cooler and she's been great sense. This past week, I had transmission fluid blowing out when I pulled up to the house. Tracked it down to a pinhole in the transmission lines. Patched it up. Filled her back up with fluids and shifts as good as new. This transmission has been beaten, bruised, and abused for 350,000 miles. Many of those miles pulling a loaded and unloaded 8,000 lb. dump trailer. I give two thumbs up to Chevy on the 4l80's.

When u pull what kind of milage do u get. I understand this isn't mpg king but asking because I am looking to get one to haul with daily. Were you using bumper pull or gooseneck?

 

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