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4l80e reliabiloty

Raptordude

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Raptordude Enthusiast

Raptordude

Posted
Posted

Hey guys, I have a 2001 Silverado 2500HD with the gas 6.0. It just hit 111,000 miles. Also, it has the 4l80e transmission. My question is, how reliable are theses trannies? How many miles are you seeing out of them? My grandfather owned the truck before me, and he had the transmission regularly flushed by a dealership, so I know it's been taken care of. However, he did use it to pull a big 5th wheel camper so that put some stress on it. Now that I have the truck, it does very little towing, and what I do occasionally tow is very small. What kind of mileage can I expect out of this tranny assuming I continue regular maintenance?

 

 

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Formulabruce Enthusiast

Formulabruce

Posted
Posted

I would pull the grill off ( easy) and put in a bigger trans cooler if you are going to tow, and especially if you will plow.

These can have problems with the shift solenoids wearing, and GM did upgrade the Valvebody and Pump for the 2004 model year ( from my recollections. Its a TH400 with Overdrive, so its a Real Good trans.. Keep temps under 200 and it should last 4L80E's that have been "worked" usually need some work/rebuild between 125 and 150K . If you end up there I would put in a New or upgraded valvebody and Pump, or pump pressure valve ( neither are in a Kit) .

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Raptordude Enthusiast

Raptordude

Posted
  • Author
Posted

Hmm interesting. Well now that I have it, it doesn't do any pulling. Also, how do I edit the title? The typo is bugging me haha

 

 

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Boardmember Senior Enthusiast

Boardmember

Posted
Posted

Related, I have a 2016 5.3l 8-speed and have had other GM owners talk to me (warn me?) about transmission reliability on their 6-speeds and express concern about the new one. Coupled with the move to the 60k vs 100k power train warranty, and the lunky behavior of the new transmission, they've planted a seed I wish I didn't have...

Raptordude Enthusiast

Raptordude

Posted
  • Author
Posted

Oh and also, when my grandfather would pull his camper, he would let it in 3rd gear....which I've heard is best when towing heavy

 

 

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davester Senior Enthusiast

davester

Posted
Posted

The transmission is pretty solid...since you aren't towing much anymore, I wouldn't bother with the larger transmission cooler.

Colossus Senior Enthusiast

Colossus

Posted
Posted

Personal opinion, but tranny flush every 35,000 will go a long way for longevity.

jgl25 Enthusiast

jgl25

Posted
Posted

I just had my 80e rebuilt @ 119,200 in my 99 Sierra 2500. Before I bought the truck the previous owner had used the truck for plowing and towing. Needless to say it wasn't well taken care of in the long run. Heat pretty much killed my transmission along with the metallic shavings from the torque converter cloging up the filter causing it to overheat, as the transmission shop told me. But up until the day I took my truck in, even with the torque converter practically coming apart, the truck was extremely reliable shifted through the gears, shifted extremely hard when it got up to temp but I was able to limp it along for 3 weeks before going in. But if your 80e goes I hope you have deep pockets because its not cheap.

66nova Senior Enthusiast

66nova

Posted
Posted

The 80 is a beast. In my opinion one of the best transmissions GM has ever built and they are very reasonable priced to build and have a stout transmission after.

jgl25 Enthusiast

jgl25

Posted
Posted

After the issues I have had with the 80e I still think it is a great transmission. My truck was unfortunately beat on before it came into my hands causing the issue. But after the rebuilt it runs great although I do feel I should tune the truck to make it go a tad bit faster :D

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