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#1
02-08-2005, 09:18 PM
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Shift problems
My 97 silverado has been shifting really super hard after i drive it at freeway speeds for more than 15 minutes or so. But if I shut the truck off for 15-20 seconds, and start it right back up again it will shift perfectly fine.
Any Ideas? 
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#3
02-09-2005, 04:17 PM
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Re: Shift problems
Quote:
I as afraid that would be an answer. Fluid levels are fine. Just hoping there was something fixable that was causing this problem. Thanks
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#4
02-09-2005, 07:59 PM
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Re: Shift problems
Quote:
There was a recall on the 97's for a ground wire on the trans. If that wasn't done it could be the problem. Most likely it is the lock-up solenoid hanging up in the valve body. It is common and cost around $300-500.00 to fix. If the truck has a lot of miles then you may want to consider having the trans gone through. If it keeps acting up don't try and drive in overdrive, Leave it in drive or you will burn up the trans for sure. The reason it shifts hard is because the computer senses slippage and it raises the pressure in the trans to try and overcome it. If you have the computer scanned for codes you will most likely find a P1870 code. It may be there even if your SES light isn't on in the dash. Shutting the truck off and restarting it actually helps because the computer has to sens the slippage again before it will up the pressure. I guarantee it is one of the things I told you. Most likely the TCC solenoid hanging up in the valve body. If you haven't driven it a lot with it slipping then just fixing the valve body will correct it, However if there is a lot of miles on it I strongly suggest a rebuild. The reason is because you can spend several hundred dollars to fix the valve body and have the rest of the trans go out ( especially if you drove it a lot with the converter not locking up) and the money you spent on the valve body will have been wasted because all that gets replaced again when the trans is rebuilt. If money is tight then maybe you can't swing the money for a rebuild and have to just fix the valve body. Either way don't keep driving it if it is acting up and if you have to drive it don't use overdrive or you will burn the trans up, Use drive because in overdrive if the converter isn't locked up it will overheat the trans. Good luck with whatever you decide. Last edited by Thunderbolt; 02-10-2005 at 09:57 PM.
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#5
02-09-2005, 08:18 PM
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Re: Shift problems
Don't drive it till it breaks. If something's mechanically wrong, it could be MUCH more expensive than if you fix it now.
It sounds like it might be a sensor... it seems like it would go away immediately if you turn the key off and back on. You may want to try that in an empty parking lot while you're rolling. Also, have you tried shifting into park (while you're stopped, of course) and then through all the gears to see if that does anything?
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#6
02-10-2005, 10:01 PM
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Re: Re: Shift problems
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I edited my previous post because I forgot to say why shutting the truck off and restating it makes it go away.
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#7
02-10-2005, 11:17 PM
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Thanks for all your feedback.
The truck has 135,000 now. So maybe it's time for that rebuild. Come to think of it. Not very often but every once in a while when on the freeway, I do smell something burning. Also when I do turn it off and restart it, it turns very slow. Possibly the starter heating up from the tranny? The engine is at normal temp. But anyway I think i'm going to start price shopping. Thanks Again
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