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Old 05-29-2012, 08:01 PM   #1
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Default Delayed 1-2 shift - 4l60e

I have a 4l60e with 162k on it. I figured its time for a new tranny but I wanted opinions here before I decide. The tranny feels strong and all shifts except the 1-2 is smooth.

What happens is it feels like the tranny hesitates and doesnt engage second when its supposed to, this in turn causes a little bit of an aggressive shift as it drops it into gear at the wrong RPM. I have read that this is a characteristic of a 4l60e, but I disagree. After researching on here, all I see is everyone talk about ways to increase shift firmness (servos, shift kits, tuning the tranny) but I actually want to soften that shift back up and make it feel stock as its my DD. Not actaully soften it, just make it shift at the right moment. I should point out that under WOT it feels just as it should. Also, when I bought the truck it had over 3 quarts too much fluid in it. I immediately drained it and changed the filter, the fluid looked fine. I now have the proper amount of fluid and it feels much better, but still not right.

Any chance my tuner could fix that shift or is this tranny toast?
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Old 05-30-2012, 01:49 AM   #2
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Upon further experimenting it only shifts rough/delayed if I'm under 2000 rpm when it wants to shift. Could there be a tune on this truck or something? Gonna go to my tuner tomorrow...
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Old 05-30-2012, 07:10 AM   #3
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Is the trans stock?
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Old 05-30-2012, 01:40 PM   #4
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As far as I know yes. Most likely it is.
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Old 05-30-2012, 03:49 PM   #5
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I know that a tranny starts to slip when it starts to go out, but what about just odd behavior in general? Are the "bands" the same thing as the clutch packs?
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Old 05-30-2012, 03:59 PM   #6
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I'm guessing at 162k it's starting to show some signs of wear. The one in my Yukon is starting to do the exact same thing at low (less than 2500) rpm on the 1-2 shift. No issues at higher rpm/throttle or other gears.
I've got like 158k miles on mine. All stock.
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Old 05-30-2012, 04:52 PM   #7
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Quote:
Originally Posted by Wide Open View Post
I'm guessing at 162k it's starting to show some signs of wear. The one in my Yukon is starting to do the exact same thing at low (less than 2500) rpm on the 1-2 shift. No issues at higher rpm/throttle or other gears.
I've got like 158k miles on mine. All stock.
Ok, Im already looking for a 4l80 anyway. Lol or I can just put a huge stall in it and then it wouldn't show any signs of wear at all
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Old 05-30-2012, 05:28 PM   #8
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My truck does that for a few minutes after cold-cool startup.
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Old 05-30-2012, 05:30 PM   #9
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Quote:
Originally Posted by A Low Dime View Post
My truck does that for a few minutes after cold-cool startup.
Whats funny is that mine seems to randomly do it, but never over 2k RPM. Just aged. Im surpried it lasted this long.
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Old 05-30-2012, 11:45 PM   #10
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I would like to know if there is an adjustment that can be made to fix it. Like you said it only happens at low engine speed so I'm assuming low line pressure but not sure of that.
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Old 05-30-2012, 11:45 PM
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