Question about 2004 Chevrolet TrailBlazer
We have determined this is not a Transmission issue. We recently had the resignator taken off the muffler because it was cracked but that and the replacement of thermostat and coolent sensor is all we have tried.
I am afraid you have mis-diagnosed it NOT being the Transmission or I should say Torque Converter, TCC Solenoid. I would strongly recommend that you replace the TCC Solenoid in the 4L60E Transmission. Then see what happens. If you drive it with the TORQUE CONVERTER Button in the OFF Position on the Shifter, does it fix the problem?
Posted on Feb 13, 2014
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Posted on Jan 02, 2017
SOURCE: Chevy venture 2004 Transmission
Bring to tranny shop or repair shop, have it scanned for trouble codes, many electrical parts and solonoids in those trannys, possible it may just be a shift solonoid bad or needs adjustment, much cheaper than replacing tranny. good luck!
Posted on Feb 09, 2009
The Shift solenoids are located in the transmission oil pan. I would recommend replacing both shift solenoids while you're in there. Also replace the filter and pan gasket. The shift solenoids are located towards the rear of the valvebody and will be identical to each other. They are held in place by a retaining clip which is easily removed with a small screwdriver or similar tool. Care must be taken as parts may fly out of the bore when the solenoids are removed. Hope this helps.
Posted on Feb 10, 2009
Check the linkage at the transmission. Have somebody move the selector while you watch the linkage move. It might be out of adjustment for reverse, or be binding up.
Posted on Aug 21, 2009
you may be confusing the torque converter clutch engagement with o.d. this trans has a problem with the T.C.C. regulator valve wearing out the valve body bore. this will cause the converter clutch to engage only sometimes or not at all. this will set a P1870 code in the control module. when this code is stored in the controller, ( check engine light may or may not be on), it increases the pressure in the transmission causing the 1-2 shift to be harsh. ask a local tranny shop to scan the vehicle ( most will do this for free) if this is the problem they can either fix your valve body (sonnax parts) or replace it with an upgraded valve body. hope this helps
Posted on Dec 16, 2009
the are located behind the dipstick on the passenger side of the transmission, you must remove the retainer clips and pull straight out the same as to the radiator. You may beed to remove the heat shield on the side of the transmission to ease acces
Posted on Dec 30, 2009
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