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4L60E feels like going to Neutral

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Old Apr 9, 2016 | 08:03 PM
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Default 4L60E feels like going to Neutral

I was thinking the trans was taking a dump on me but thinking more into it i dont think thats the case.
The problem is that on the 2-3 shift it feels like it just goes to neutral. Once i get fully off the gas then i can feel it go ahead and shift and i can get back on the gas and it will run like normal.

Last edited by regency; Apr 9, 2016 at 08:17 PM.
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Old Apr 9, 2016 | 08:19 PM
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Im going to get the tuner to look again at the shift points and make sure everything is in line with rpm and mph.
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Old Apr 10, 2016 | 03:09 PM
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Most likely you have discovered the #1 problem with the 4L60E - the 3/4 clutch fails and you loose high throttle 2-3 shifts.
Looking at your times with a relatively heavy truck, a stockish 4L60E won't last long.
You will need a performance rebuild; a rebuilt trans from a sponsor is highly recommended as the "premature failure rate" of local rebuilds is very high in performance applications.
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Old Apr 10, 2016 | 04:03 PM
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Yes i was reading a thread in the stickies and the guy described my problem to the T as what his issue was. I seen your reply as the 3-4 assembly wears thin and allows the disks to "cone". Fluid is clean red with just a hint of black on the rag and smells good so i know for certain with that and the sound of the engine its not slipping, its just not making the gear change under load.
This is the original 05 transmission that i instaled a Transgo HD-2 (well half of), vette servo, and billet OD servo. Has a TCI 3600 converter. I feel blessed as to it has lasted 88k miles with 50k of it under this current load.
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Old Apr 10, 2016 | 10:10 PM
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Tuning issues usually don't cause 2-3 shift flares.....It would just stay in 2nd & hit the rev limiter....Not Neutralize (1st gear), Like you describe.
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Old Apr 20, 2016 | 04:51 PM
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2-3 flare is usually leaking 3rd accumulator which has caused damage to 3rd clutch or will after a short while, there are also other points where 3rd clutch could be losing pressure internally of course at the input shaft and stator support bushings and seals
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