Don’t use, unless you’re going over 60, you’ll get the same mileage and won’t be wearing the 3-4 out. Typically think most that stuff is snake oil but I’m telling you it works, keeps solenoids from sticking too. the fluid regularly and found adding a bottle of Lucas non slip is the best thing. “To answer it in short, I took put it aside for the, learned over the fourteen years I’ve owned it. I honestly think around 250-300k it should be rebuilt if its original.” Owner Number Three: Reverse was finicky, every now and then it would slip but had a good life. “I have close to 300k on my truck back in the day before I sold it. I'd be a little hesitant, but I also wouldn't be terribly worried of I drove it and it felt good with no slippage or harsh shifts.” Owner Number Two: Some say it's on borrowed time, and others will say it will be fine as long as it shifts good and all. While the transmission is in “limp mode”, the automatic transmission will fail to downshift or upshift.ĭifferent 4L60 owners offer their perspective on the longevity of the 4L60e transmission: Owner Number One:.Generally, this problem will arise when the PCM will sense an electrical issue and commands the transmission not to move and stay in “limp mode”.This is generally due to a fluid leak somewhere which will result in the transmission slipping. Your transmission fluid will appear at a low level.Internal mechanical failure will be the cause of transmission ‘slippage’.When it comes to troubleshooting the 4L60E, you have to keep in mind that the automatic transmission (4L60-E) in your rear wheel drive GM vehicle will usually experience failure in one of two ways: The Transmission Will Begin Slipping I, personally would rather have a fresh built HD 4L60E any day than some of these newer models coming on the market.” How Can I Tell If My 4l60e Transmission Is Bad? GM had some design flaws in these which got corrected by GM and the aftermarket. There are aftermarket parts I prefer to use in my overhauls of these. Aftermarket has pretty much taken over with the 4L60E’s much like the TH350’s. They were replaced by the 4T60 and 65E’s. They would be lined up out the door and I made a ton of money on them. When I was at the Oldsmobile GMC dealer back in the 80’s it seemed that all I ever worked on was the 440T4. Most all vehicle manufacturers have their “Problem children”. No, its definitely not the most defective transmission on the road. Did you buy the truck new or used? If used, then one has no idea exactly what the transmission went through before you bought it.”Īnother 4L60E owner added : “The 4L60E is as common as the TH350 except it is newer and bigger. One GM owner stated : “My opinion is that the 4L60E is not the worst transmission ever made. Why Is The 4l60e A Bad Transmission? Is It The Worst Ever Made?įor many, the 4L60E transmission is a good transmission, but for others, it appears as if it is the worst transmission ever made. The 60 in the name signifies that there is 6000 pounds of GVW. The L in the title signified that the transmission as an engine that sits longitudinally. The number 4 in the title indicates that the transmission is a 4 speed transmission. Additionally, the 4L60E’s name states a tremendous amount about the transmission. The 4L60E transmission is equipped to withstand as well as a handle the max engine torque of 360 lb.-ft. This was generally caused by buildup of debris. Given its performance, there were common issues with the transmission the component’s ability to use the reverse gear was seen as a grave issue. Then, there was the addition of the electronic control that improved the performance of this transmission tremendously.
Additionally, the transmission also featured strong fuel economy performance. The low speed performance capability was one of them. The popularity of this transmission was based on many of the carryover features. This transmission can still be found in light-duty van applications and even in the overseas market in the Holden Commodore. With this transmission not as widespread as it once was, there are still some applications that GM uses for this 1998 transmission. As the arrived in 1996, it was not fully created in until 1998. With many variations, the easiest to recognize externally is the removable bell-housing found on the late model 4L60E transmissions. Given such, the differentiation occurred in 1996. The 4L60E can be classified into both an early version as well as a late version.
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