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09-12-2020, 11:50 AM
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#1 |
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Registered User
Join Date: Mar 2000
Location: Clute, TX.
Posts: 1,935
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transmission GURUS
Transmission GURUS....
2004 Silverado crew... 5.3 / 4L60 /3.42 Is there an adjustment or something for the kickdown. Use to it was a cable, tbis electronics I just don't know ... Takes off fine, shifts fine, but lags when you slow to go around a corner or slow and speed back up because it doesn't downshift unless I step on it.... what could cause this. I've built trucks with 3.42 gears and wasnever as lazy as this
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2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe |
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09-12-2020, 04:50 PM
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#2 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,228
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Re: transmission GURUS
All my trucks with 4l60s were always sluggish in the down shift. Didn't matter whether it was the V6 or V8 models. They just didn't seem to have much omph in their shifts. Especially if it has to come out of OD, then down again to accelerate.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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09-13-2020, 06:45 PM
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#3 | |
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Registered User
Join Date: Mar 2000
Location: Clute, TX.
Posts: 1,935
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Re: transmission GURUS
Quote:
Gotta be a fix.....
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2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe |
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09-13-2020, 09:10 PM
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#4 |
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Moderator
 Join Date: Dec 2012
Location: ON, Canada
Posts: 2,176
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Re: transmission GURUS
You can get it crisper with programming, but no manual adjustments can change things.
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09-13-2020, 09:20 PM
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#5 |
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State of Confusion!
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,228
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Re: transmission GURUS
They make performance shift kits and valve bodies for them, but I believe they fetch a healthy price.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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09-13-2020, 10:23 PM
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#6 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,673
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Re: transmission GURUS
ask it down in the drivetrain section ( or maybe Bill can move it there) and see if clinebarger has a suggestion..dont know if he'll see it here
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Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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09-13-2020, 11:26 PM
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#7 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: transmission GURUS
Tuning is the only way to correct that if it's possible without creating an overactive kickdown, If you have oversize tires.....You must correct the tire roll out in the tune first.
If it's staying in 2nd.....You may not want it to kickdown to 1st Considering the ratio spread between 1st & 2nd. |
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09-14-2020, 10:34 AM
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#8 |
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Moderator
Join Date: Dec 2012
Location: ON, Canada
Posts: 2,176
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Re: transmission GURUS
Yes, I should add that you can do it with a shift kit as well. What I meant is that there is no external mechanical adjustment (like a TV cable) that can change things. Programming can increase line pressure. On my 4L60E (before I went T56), it had a shift kit along with a slightly higher stall converter. It would easily spin the tires when it hit 2nd gear (and that was on 295 rear rubber). If you are doing a shift kit AND programming, you need to really go over things with the tuner and make sure the line pressures aren't too high (along with shift points, rear gears, tire height, etc).
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