Worst time to go WOT
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From: Grand Rapids, MI
Worst time to go WOT So is it true that WOT should be avoided on the highway (say over 60 mph) because the 4L60e cannot really handle too much of the downshifting involved? And is it safe to say that if you do like to mash the petal it is better to do at lower speeds (say 0, 10, 20, 30, 40 mph)??? I have a 98 Z w/ 2.73 gears and 80,000 on the clock and a 3400 stall 2.1 and I really don't want to buy a new tranny right away. Thanks.
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From: Grand Rapids, MI
Sorry for any confusion, but I actually was referring to leaving the car in overdrive the entire time with no manual downshifting. I have heard that even when leaving the car in OD, going WOT on the highway can kill a 4l60e pretty quickly. I was just wondering if that is true???
Originally Posted by Transguy
Going to WOT at any speed and allowing the transmission to downshift in order to acellerate will not hurt your 4L60E, period.
Also is it better to tap the brakes first to unlock the converter, or is this necessary?
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Originally Posted by Transguy
Going to WOT at any speed and allowing the transmission to downshift in order to acellerate will not hurt your 4L60E, period.
HA i wish....if im gion 60-70 and floor it...my downshifts dont catch and it will redline until i get off the gas and then it catches... i need to fix it....any other time it shifts very firm...any ideas of what to do to fix it...im plannin on a tranny cooler next week
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He asked for an opinion, and I gave him one, not looking to get into and argument with you or anyone else. If you want facts come to my shop and I will pull a few hundred repair orders form 4L60Es that I have built and given my customers the same advice.
Originally Posted by transam02
Seems to me if you go ahead and select the gear before you go wot, you would not hurt your transmission as bad.
If GM did all the torque management BS to help the trans live I would think they would address this issue as well.
I'll drive my car anyway I want. I blows my mind that people are so uptight they want to unlock the converter with the brakes, then go wot? You might as well get out of performance cars if you're going to make driving that difficult.
I beat the hell out of my transmissions (amature built) (by me).
Nothing unusual from driving this way.
Want to save your trans? Drive like your grandmother.
I'll drive my car anyway I want. I blows my mind that people are so uptight they want to unlock the converter with the brakes, then go wot? You might as well get out of performance cars if you're going to make driving that difficult.
I beat the hell out of my transmissions (amature built) (by me).
Nothing unusual from driving this way.
Want to save your trans? Drive like your grandmother.
I talked to Carl Rossler and Rodney at RPM, and they both told me one of the worst things you can do to the 4l60e is to floor it on the highway while in OD. They said that if you're going to roll with someone on the highway, drop it down to D first and then punch it.
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If I had an application chart loaded on my computer I would show you very clearly what is on and what is off in every gear, It is pretty simple when you see it on a chart. Basically [ without getting into a tremendously long reply ], going from 4th {OD} to 3Rd is as simple as releasing the 2/4 band, enlighten me, and explain how this hurts the transmission?
I'm by no means any kind of tranny expert, so I couldn't begin to give you specifics.
I just know that when I asked them things to avoid doing with their built 4l60e's, both of them responded with the same answer. When they explained why, it got a little too technical for me.
I just know that when I asked them things to avoid doing with their built 4l60e's, both of them responded with the same answer. When they explained why, it got a little too technical for me.
Originally Posted by Gary98Z
I'm by no means any kind of tranny expert, so I couldn't begin to give you specifics.
I just know that when I asked them things to avoid doing with their built 4l60e's, both of them responded with the same answer. When they explained why, it got a little too technical for me.
I just know that when I asked them things to avoid doing with their built 4l60e's, both of them responded with the same answer. When they explained why, it got a little too technical for me.
From what i've read the answer seems to be going INTO, or OUT OF an overdriven gear at WOT is really hard on the 4L60E. Why, I can't say because i'm not an expert on this subject.
At the same time, they also recommend using the "OD" selection when drag racing from a stop.
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Joined: Oct 2005
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From: Miami, FL
I hate running inot these topics. You can't run into any 2 'experts' that have the same opinion on WOT shifting. I've seen several threads, each several pages long, and none have made any progress to answering any of the specific questions outlined in the first post. And naturally I force myself to read every single post of redundancy, because I don't want to spend several thousand $$ on a new tranny anymore than anyone else does.
I wish someone that knew what they were talking about would just enlighten everyone, this confusion has been going on for way too long.
I wish someone that knew what they were talking about would just enlighten everyone, this confusion has been going on for way too long.
I'll post one good one I can find...I know there were more but I can't find them now...
I believe this mostly applies to racing from a stop, so long as you do not go fast enough to shift into 4th (OD)...i'll keep looking...
Originally Posted by Pro Built Automatics
With the 4L60E, and you are going to "drag race" it, leave it in OD. This will prevent the overrun clutch assembly from coming on, especially on the 2-3 shift where you need all the oil going to the 3-4 clutches on a WOT shift, and not to the overrun setup also. Dyno tests have shown this to be the best way of doing this with the least amount of problems. A 2-3 flare at WOT in the "D" position, and the flare is not happening in the OD position is indicative of not enough oil going to the 3-4 clutches. This is only "one" of the good reasons why the 3-4 clutch pack will live longer when you leave it in the OD position when drag racing it.
doesnt OD have the weakest clutches? i heard going WOT(actually shifting from 3rd to 4th) either manual or automatic into OD is the worst possible thing, and it also happens at a pretty high speed with stock gears.