Transmission module my 2000 blazer wont shift like it stuck in 2nd or 3rd changed shift silonoids and still same prob fuse is ok and getting power should there be power to the crank fuse or what should I do

SOURCE: 1995 jeep grand cherokee auto trans prob

sounds like the transmission is in "limp"mode it allows you to drive even though there is a problem with the transmission,the code 21 is probably a transmission manufature control code and not engine go to autozone and they can scan it for free,if you just had transmission fluid changed recently if you used anything other than what the manufature calls for like atf+4 then this is your problem,flush the system and do a fluid and filter change with correct fluid as by what the owners manual,or dealer calls for,don't rely on autozone to get it right.

SOURCE: transmission wont shift

check the kickdown/throttle valve cable. It may be bound up and stuck in the maximum position giving you extremely late shifts.

There ISN"T any modulators or vac lines on any Chrysler automatics

SOURCE: 4L60E won't shift to 3rd on 1993 Chevy Blazer 1500

Sounds like you have a bad shift solenoid. Not sure if the Chevys are a solenoid pack, or seperate, but it will need to be replaced.

Harvey N Tawatao

• 3854 Answers
• Posted on Aug 20, 2009

SOURCE: wont shift into 2nd gear revs high until it finally goes into 3rd

If there is a Auto Zone around your area, have the blazer scanned for any DTC codes that is related to the transmission issues. It could be a fault sensor, bad wires, or bad solenoid in the valve body. The scan should help indicate if there is an electrical issues or it's going to be mechanical. You can try adding a transmission additive to flush out the system and then replace the transmission filter and oil. Make sure you flush out all the transmission oil, it could be as simple as the 2nd and 4th solenoids are seized with dirt and not activating. Good luck and keep me posted. The solenoid is in the valve body and is not that expansive for the parts, you just have to find a good transmission shop that will fix this simple problem and not try to get you to put in a new transmission. 

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SOURCE: my 97 chevy blazer won't shift past 3rd gear

Drop the pan, odds are the shift solenoid is out, its located at the front of the trans on the driver side. I'm sure your check engine light is on that will comment about the timing/shift solenoid being bad. I had the same problem with mine. The solenoid had plastic coming out of the inside. To remove it you'll find a small C clip holding it in, just take a small screw driver and pull the clip out. The part cost me like $36 from my local dealership. And its a longer solenoid. I believe its the 3-2 downshift solenoid. I do have the part number if you need it.

Testimonial: "Thank you so much. I actually thought this was the problem, but i didn't know. Thanks again!! send me the part number"