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4L60/65E RPM limit?

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Old Aug 18, 2025 | 12:53 AM
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Originally Posted by GGolliver
6k burnouts aren’t a necessity.
Cool!

Originally Posted by GGolliver
going forward i definitely won’t be reving it out like that.
Cool!

Originally Posted by GGolliver
you make it seem like driving my sporty car (I hesitate to call it fast or muscle) aggressively is something to be shamed.
Actually, I think I worded it the least like shaming possible in the English language given the situation. I repeatedly referenced that it was performing appropriately for the conditions in which it finds itself, and referred to the right of an owner of a machine to use it how they choose, even if they way they use it might break it. The only place I think I might come off as shaming is where I said:

Originally Posted by CathedralCub
you already know burnouts are hard on the car, you expect to break stuff by driving hard, and you will not stop.
. . . but I was only repeating what you had already said here:

Originally Posted by GGolliver
I know burnouts are hard on the car. Yes I expect to break stuff by driving hard. No I will not stop.
Please let me know what I said that appeared to you to imply that driving your sporty car aggressively is something to be shamed.

Originally Posted by GGolliver
They knew what they were making
Yes, they did, and then they included traction control with it.

Originally Posted by GGolliver
thus they gave it the 65e trying to beef it up.
To be fair, the 4L65 was installed in many vehicles with a 6.0 or larger engine. 2005 was the first year for the GTO to have a 6.0, so that'* why it got a 4T65 instead of a 4T60. Other vehicles that got the 4T65 were the Escalade, Corvette, Sierra Denali, Yukon Denali, and Hummer H2, all of which had a 6.0 or larger engine.

Originally Posted by GGolliver
im not driving this way in my truck because yeah, nobody does that.
Wellll . . . there are a bunch around that do, but that'* fodder for a different thread.

Originally Posted by GGolliver
But nobody rips on their muscle cars?
I never said anything like that, and challenge you to find anything like that that I said in my entire time at GMForum. This entire thread is about verifying the validity of your mechanic telling you to keep your burn outs under 5,500RPM.

Originally Posted by GGolliver
That’* the whole point is it not?
For some. Others have them as investments, many enjoy the look and how they look in them, many like the acceleration, some like the occasional burn out. Many of them strongly dislike buying tires for them, though, as tires for these kinds of cars are expensive. I haven't seen many that do lots of big burn outs on stock and/or tired parts, but that is not to say that nobody does. Some learn a lesson the hard way, others get away with it.

Originally Posted by GGolliver
Why else am I putting gas into this heavy lump of metal?
I'm guessing because, as you drive for whatever reason you are driving, you like to have some extra fun as well . . . but I don't now you well enough to really be able to answer that question.

Originally Posted by GGolliver
I’m not roasting the tires at every stoplight. I feel like the occasional burnout is not an uncommon thing.
Yeah, depending on what "occasional" and "uncommon" mean to each of us, keeping in mind that "occasional" and "uncommon" burn out could refer to small events, and they could also refer to 6,000RPM ten second burnouts. Either way, this thread has been discussing the professional advice to keep burn outs below 5,500RPM, while your transmission (that wasn't in the best health) had issues doing one at 6,000RPM before shifting to the next gear.
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