Question about 2004 Chevrolet Silverado 1500 Crew Cab

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Tech recommended a transmission flush?

Have rec'd differing opinions on flush vs. replacing trans fluid.

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A flush involves putting an input on the transmission and an output.Then while the car is running or not put new fluid in while the old fluid is forced out. Replacing the tranny fluid is just removing the lower pan and gasket and replacing the filter. When this is done you lose only a fraction of the fluid in your transmission (usually just a 1/3 of the fluid the other 2/3 is still the old fluid). the flush also includes replacing the filter and gasket as well. The flush is a more thorough cleaning job of the transmission fluid. Im sure what you are concerned about is that is it really neccessary? the answer is : Most cases..no. However, If you get a transmission filter change have them show you the pan and magnet that is in the bottom as well as the transmission fluid. Normally there is a light dusting of metallic "sand" around the magnet..(it catches the tiny parts with the magnet). Now if there is metal shavings... thats bad. and the transmission isnt going to be saved even with a flush. Now have them bring some "Fresh new" transmission fluid so you can compare these two. Most transmission fluids are red of various shades, When transmission fluid goes bad it is usually "Burnt" the red then looks more Brown. It also smells very diferent (it will smell burnt) thats when a flush would really do your tranny some good. Transmission Fluid is actually Hydrualic fluid. It doesnt get broken down like engine oil does Instead it works until it is overheated. The filter catches most debris and the magnet catches the iron that the filter misses.If the new tranny fluid is more clearish than red but now its much darker then you can make an asumption that it is burnt. I hope this helps you in your decision making. Knowledge is POWER. dont be afraid of learning about your car. 8-)

Posted on Jun 04, 2009

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I think that fluid replacement, is always better, especially if you have a drain plug on the torque converter, remove the inspection cover and look at the converter, should be a small plug next to one of the torque converter mounting bolts, you may have to rotate the engine to find it, this allows you to remove practically all of the fluid, and you change the filter at the same time, its better for the transmission. Your owners manual will give you a refill capacity. Just like your engine replacing oil with a filter is better.

Posted on Jun 04, 2009

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