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Chevrolet Blazer GMC Jimmy Transmission Problems

382 messages,  Last post on Apr 12, 2013 at 10:12 AM

You are in the Chevrolet Blazer Forum.

What is this discussion about? Chevrolet Blazer, Transmission, SUV

Messages Page 23 of 39

#217 of 382 Shifting problems by joe_h1

Nov 27, 2009 (2:38 pm)

My 1996 Chevy Blazer's check engine light came on and read for the shift solenoids. So i dropped the pan and replaced all of the solenoids along with the Manifold Pressure Switch, Internal Wire Harness, all Check balls, and put a new transmission filter kit and now it will not shift into any gear at all. If anyone has any idea on what i could of hooked up wrong can you let me know. And i am pretty sure i hooked up the shift linkage right and never touched the clutch

#218 of 382 Re: Shifting problems [joe_h1] by pocity

Nov 27, 2009 (4:38 pm)

Replying to: joe_h1 (Nov 27, 2009 2:38 pm)
If you changed the torque converter lock-up solenoid too then you possible installed it 180deg out or you put one of the check balls in the wrong place.

#220 of 382 Re: Shifting problems [pocity] by joe_h1

Nov 28, 2009 (10:48 am)

Replying to: pocity (Nov 27, 2009 4:38 pm)
OK thanks i will have to try the torque converter lock up solenoid i am sure all the check balls are in the right place have a map of the vavle body that shows where they go

#221 of 382 Re: 1998 S-10 Blazer [bbarner] by kinnaird83

Nov 29, 2009 (5:31 pm)

Replying to: bbarner (Sep 11, 2009 6:25 pm)
I dont know if you received an answer yet but i had this same problem with my blazer... mine was parked for about 3 months because the motor blew up. Anyways there is a SPS shift position sensor on the transmission that goes bad and cause it to do this. Mine did the same exact thing yours is doing.

#223 of 382 97 Blazer No Fwd or Reverse; Tranny Just Swapped and suspected to be good. by 2manytoyz

Dec 12, 2009 (12:20 pm)

Engine, Transmission, Transfer Case, and PCM from a Totaled (rolled a few times) 1997 (red) Blazer, have been swapped over to another 1997 (brown) Blazer. The Transmission had a remanufactured sticker on it, so I suspect it was lower mileage and in good condition. It certainly had clean fluid in it, when pulled. The truck was driving on the highway when rolled.
 
The engine would not start on the Brown Blazer and was found having low compression on a couple cylinders, which is why the swap was performed. After several headaches and setbacks, I was able to get the engine started yesterday. However, the truck will not move in forward, or reverse. Another (minor) setback; the shifter will not shift out of Park, without depressing the bypass switch physically located on the shifter assembly (thanks to whomever identified that in a previous post).
 
So, I can; start the engine, run up to 4000, or so, rpms, bypass the shift lock and enter all gears. The truck goes no where, the engine doesn’t seem affected by any gear shifting. I can tach 3500 rpm and shift thru all gears with absolutely no movement of the truck, or hesistation of engine rpms. It feels like the engine isn’t even connected to the tranny. I suspect the tranny, torque converter, wiring harness to the -transmission, or –PCM, Vacuum Issue, or perhaps something else to be the culprit. Anyone know what causes this tranny to engage in gear?
 
Yes, there is plenty of tranny fluid and it looks good. Yes my brake lights illuminate when depressing the brake pedal, I hear a relay under the dash or console, when I step on the brake and try to get out of park, but the button won’t fully depress. I don’t think this and the lack of tranny movement are related, but not sure if there’s some switch in there that could cause this to happen. No relevent PCM codes. (I think one was for an O2 sensor, the other was engine related, but I'll have to double check).
 
It's to my understanding, to get a transmission trouble code, it must complete a bunch of requirements, such as send 12v, and ground, and so forth. If not all these requirements are met, then no trouble code will be issued. If I have a broken wire, I suspect all the requirements might not be met, and the truck will not throw a code. I'm not sure though. I've had very little luck accessing any diagrams. (free, via link, or whatever). I have a Chilton, but that's sorta helpless at this stage.
 
A previous set-back, was a pinched wire harness going down to the transmission. I reconnected all those wires with butt connectors and that fixed one of my problems (couldn’t crank engine; neutral safety switch wire was pinched). Tranny also, has a new neutral safety switch.
 
Also have a mystery wire off the PCM that’s been cut (brown blazer), with speaker wire spliced into it. Not sure what it was, were it went, or anything else about it, but it’s been disconnected. I’ve reconnected it, but still that helps nothing. The truck was like that when I purchased it, so I don't know if this could be a preexisting problem.
 
Does anyone have a diagram available, of the PCM wiring? Transmission Wiring? Can a wiring issue prevent my transmission from locking up (if that’s the technical term)? Does anyone know what wires coming off the PCM go to the tranny?
 
Suggestions anyone? Thanks

#224 of 382 Re: 1995 S10 Blazer 4wd Tranny problem [blazeher] by starterguy

Dec 12, 2009 (8:46 pm)

Replying to: blazeher (Jun 23, 2008 8:25 pm)
HI I have the same problem can you tell what fixet your blazer.
 
         Thank You

#225 of 382 Re: blazer wont move [bethrad] by starterguy

Dec 12, 2009 (8:50 pm)

Replying to: bethrad (Aug 13, 2008 3:44 pm)
HI Can you tell me what was wrong what your blazer my blazer is doing the same thing.
 
           Thank You

#226 of 382 No FWD or Reverse Not Fixed Yet by 2manytoyz

Dec 12, 2009 (9:55 pm)

I just posted that today. I'm not in a hurry, but I'll get it fixed sooner or later. If you get yours figured out, holler back. let me know.
:o)

Messages Page 23 of 39

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