Having problems with your 1999 Chevrolet Silverado 1500 ?

After 45 minutes of driving my transmission changes rough

\015 When i drive my 2003 impala for about 45 miniutes the transmission gears start to change rough also i feel the the car losses power at 60 mph at this time also,before this 45 miniutes driving the car runs fine can anyone help also there is no overheating or check engine light turning on milage is at 96000,\015 Posted / edited by AnonymousUser on : 01-03-2021

Answers :

These transmissions were known for having PCS(Pressure Control Solenoid) problems with the higher miles I would agree on a complete trans flush and filter change.The Pressure control solenoid sarts to hangup causing high pressure when not commanded which will cause hard shifts.
One thing I have to say, any-ones get close to 100k on domestic transmission 4 and 6 cylinder got their money worth. Life expectancy on domestic 4 and 6 cylinders transmission usually my opinion its about 60k to 75k miles although I have seen some with good luck 100 to 150+ but rear on domestic cars. I would take it to a GM dealer and have them do a transmission flush and change transmission filter, that should solve some of your problems. If you a second owner 99% of the time no one have change fluid or filter. If you the original owner than you know its time to take it in and get it service. having nearly 100k mile pay close attention to it, change your oil every 3k miles and don't ride it hard, all the seals is old from your transmission to the rear main seals. Once a month fill it up with 93 octane and mix a can of fuel injectors cleaners keeping problems free with your injectors and your valves. Hope that help some
Repair Help & Product Troubleshooting for 1999 Chevrolet Silverado 1500

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