Question about 2004 Chevrolet Silverado 2500HD
Cooler lines may need flushed out. Also check to make sure the radiator is clean on the front. If you have an extra cooler for the transmission make sure that is clean also. If you don't have the extra cooler, it would be a good time to add one.
Posted on Jun 08, 2014
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Posted on Jan 02, 2017
there is a solenoid that turns it on and off, it (the lock up part) works by pressure. There is not a magic switch or valve that will turn it off. Most of the time a new torque converter is the only fix, but not always. Allison is a different bird than the GM trans. GM let us fix that at the dealer Allison would have us pull it and replace it.
Posted on Jul 31, 2009
Make sure you have the proper amount of tranny fluild in it and get that Valvoline fluid out of it. Allison transmissons have there own type of tranny fluid and you want to use it. You can buy the right stuff from a Allison dealer. Most Detroit Diesel dealers are also Allison dealers. Look them up in your phone book and they will tell you the quanity and sell you five gallon pails of the fluid. Just get the serial number off of the side of the transmisson before you call. Change the fliters again too. Believe me, this is important. My company has Yard horses with Allison transmissions and you don't want to screw with the small stuff. Service them right and they work as hard as you want.
Posted on Aug 09, 2009
What kinda batteries do you got? Are the cables any good? Sounds to me like a power/ground issuse. Either that or you have to small of batteries to crank over a high compession enigne when it's cold, with the glow plugs, and heater grid pulling all of the power from the batteries.
And check the trans fluid level for your problem with the trans.
And you're gonna need to be a little more specific on the thunping noise.
Posted on Dec 10, 2009
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