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Originally Posted by JohnnyR17
Id say there is a problem with the transmission. 
Check the fluid level with the transmission warm and the engine running.
Other than that, drive it till it breaks, then fix it! |
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.