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Tranny Clunk/slip

04silverado1500

By 04silverado1500
in Ask A GM Technician

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04silverado1500 Enthusiast

04silverado1500

Posted
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well my transmission has been acting up in my 04 silverado so i just uninstalled my bully dog hand held tuner and it got worse now its 1-2 up shift will slip and then grab making an ubrupt clunk into gear (not a noise just a feeling) i wwas wondering what i should do it only does this when the truck gets warmed up the service tech was saying for 50 bucks i can get a crank relearn done but hes not certain it will fix the problem my other option is that my dad might be swapping vehicles with his co worker the co workers 05 maxima for my dads gf aviator and then i would trade my truck in on a vw jetta for his gf and i would take the maxima. let me know what you think i should do

PurdueQS Enthusiast

PurdueQS

Posted
Posted

I'm having the same problem. I have an '03 Silverado Quadrasteer w/ the 5.3L and 4L60E tranny. Tranny seems to slip between 1st and 2nd..then grab. I noticed it when I bought it, and found a service bulletin about those conditions being caused by electrical interference from the alternator causing the transmission pressure control solenoid to act up. The fix was basically adding another wire to the alternator connector. More info here: http://www.gmfullsize.com/forum/showthread...5015#post765015 and here: http://www.mightyautoparts.com/pdf/articles/tts0204.pdf

 

I did that fix...didn't really seem to do much. So I ordered a custom Wester's tuned pcm to help performance and to firm up the shifts. I actually had them do it twice, because I wanted the shifts firmer yet. I was hoping making the shifts firmer and upping the line pressure in the tranny would help the slip between 1 and 2....plus I hate it that GM is trying to make pickups shift like cars...it's a truck, who cares if the shift is a little firm...I don't like slippin' it between gears. Wester's seemed to help some..but the slippage definitely still there. If anybody else has any ideas, I would greatly appreciate the help too.

 

Have also dropped the tranny pan, changed filter, inspected stuff...seemed alright. Next step is a bottle of Lucas to the trans fluid I guess...

04silverado1500 Enthusiast

04silverado1500

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i have to say maximas are sweet cars with great quality overall though plus it would be worth more but yea i had a flash done last week and then all seemed to be going good until today! now it does this everyonce in a while at random! this is pissing me off now

fourwheelinfool Enthusiast

fourwheelinfool

Posted
Posted

Well I'm assuming since you've talked to a tech that you've also checked your tranny fluid. Even if it still looks fine, if its the original fluid, I'd change it. Thats about the only thing you should do yourself.

 

If after changing the fluid the condition is the same, I would personally call as many dealer service departments that you can and talk to them about the problem and try to get a suggestion as to the problem. If I may, I would suggest calling SMALLER dealers as they often are in more need of work.

 

If you can narrow the problems down to a few suggestions then do some research on them and see if you can't define the problem. After that stroll (or clunk) into a smaller garage and chat with the staff about what you think the problem is.

 

Never let someone into your tranny without knowing EXACTLY what you and they think the problem may be. Identify it and make sure they call you if they think it's otherwise. Once your tranny is dropped you're screwed.

 

You could have a bad seal, solenoid, faulty sensors, any number of things. You could also have bad transmission fluid or a slow undetected leak. If you have never had tranny fluid chaged that would be the FIRST thing you should do. You need to check it properly and on a level surface.

Norseman Senior Enthusiast

Norseman

Posted
Posted
i have to say maximas are sweet cars with great quality overall though plus it would be worth more but yea i had a flash done last week and then all seemed to be going good until today! now it does this everyonce in a while at random! this is pissing me off now

 

I wouldn't say quality and Nissan anything belong in the same sentence. And hell don't even get me started on VW :)

04silverado1500 Enthusiast

04silverado1500

Posted
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that would be why my uncles friends maxima went 600k miles on two transmissions before he traded it that being the only major issue the entire time he had it besides regular maint. you cant say nissan doesnt have a little quality if this happened and vw's are built like tanks i would prefer to be in that toureg or jetta over an impala in an accident not saying there the best cars made and not that i am a chevy hater (i love chevy) but there are other things in the world that sometimes i have to admit to having just as good or better quality in my personal experiences and yes the maxima did have 600 and some miles on it not joking

Norseman Senior Enthusiast

Norseman

Posted
Posted
that would be why my uncles friends maxima went 600k miles on two transmissions before he traded it that being the only major issue the entire time he had it besides regular maint. you cant say nissan doesnt have a little quality if this happened and vw's are built like tanks i would prefer to be in that toureg or jetta over an impala in an accident not saying there the best cars made and not that i am a chevy hater (i love chevy) but there are other things in the world that sometimes i have to admit to having just as good or better quality in my personal experiences and yes the maxima did have 600 and some miles on it not joking

 

OK, my uncles anunt friends niece brother has a Impala with over 800 thousand miles on the original engine and only one trannie rebuild :idiot:

Krambo Enthusiast

Krambo

Posted
Posted

...Just going to add a little that no-one talked about yet. Do any of you with the 1-2 "slip" have the Torque Management completely removed? If you still have the same levels of TM from factory, it can feel like a slip at times when the PCM pulls the ungodly amount of spark advance at the shift and then returns it one second later. In a heavily modified truck, it will feel absolutely horrible. For example, if I do a WOT blast with factory levels of torque management, the front of the truck will actually dive down and then rear back once the spark advance is back. This will be less pronounce obviously with a stock or lightly modded truck.

the hammer Enthusiast

the hammer

Posted
Posted

You know, I have this same feeling and the dealer said it was fine, no problems. It is definitely a weird feeling as it feels like a pause and catch between first and second upshifting.

orviskid Enthusiast

orviskid

Posted
Posted

i'll bet the tranny is ok on the maxima and the VW. go with it. my 2001 sle slips every now and then. i did a write up already and the only ideas were already tried. it slips every once in awhile. once or twice a year i'll get to a stop light and press the gas to go and it will just sit there for a second or two.it happens right at 1st and 2nd. no fix in sight, had it in twice. tranny is a complicated thing,any issues, just rip it out, theres no easy fix.

04silverado1500 Enthusiast

04silverado1500

Posted
  • Author
Posted
that would be why my uncles friends maxima went 600k miles on two transmissions before he traded it that being the only major issue the entire time he had it besides regular maint. you cant say nissan doesnt have a little quality if this happened and vw's are built like tanks i would prefer to be in that toureg or jetta over an impala in an accident not saying there the best cars made and not that i am a chevy hater (i love chevy) but there are other things in the world that sometimes i have to admit to having just as good or better quality in my personal experiences and yes the maxima did have 600 and some miles on it not joking

 

OK, my uncles anunt friends niece brother has a Impala with over 800 thousand miles on the original engine and only one trannie rebuild :smash:

 

 

you might be making stuff up and thinking im funny but im not the one flaming about it....atleast it actually did and im not some 12 yr old screwing around on these forums....come on get some respect for people im pretty sure its a free country if they want an import let them have it.....i like chevys first and will always look to buy one (or an american car) but not if its not sensible at the same time (i have never owned an import)

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