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Chevrolet Blazer GMC Jimmy Transmission Problems

221 messages,  Last post on Nov 29, 2009 at 4:31 PM

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#167 of 221 1998 Chevy Blazer tranny problem by mkc716 Sep 03, 2008 (10:40 am)
About 2 months ago, I had a spring replaced in my tranny. The problem was it was shifting hard between 1st and 2nd. That seemed to fix it. However, Just today it started doing it again. I was wondering if I should take it back to the shop that fixed it and ask them to replace the control valve body this time ??
#168 of 221 Re: 97 and 2000 blazer [countr1000] by mchnhd2 Sep 03, 2008 (12:45 pm)
Replying to: countr1000 (Aug 21, 2008 7:03 am) May sound stupid and simple but check the Trans fuse. That's what my sister's turned out to be. If the fuse is ok maybe check inside the wiring connectors for corrosion or check wiring harness for damage?
#169 of 221 98 Blazer by ghovatter Oct 26, 2008 (10:09 am)
I have been asked to work on this unit. When it was droped off with me the unit was very hard starting. I did get it started and got it in the driveway but it sounded like there was something broke in the engine. It has sat for the summer in the drive way. I went to move it to the garage last week and it will not move. The noise is a knocking hammering noise by the bellhousing. The engine will run good and smooth at mid throttle niosy but smooth it will stall at idle and shack the whole car when in gear. In park the unit will idle and the noise is not as pronounced. I have removed the engine belt to make sure it was not a bearing out on a pulley. What would you say to look at first engine or transmission.   Thanks Greg Replies to this message: pocity (Oct 26, 2008 10:28 am) ghovatter (Oct 27, 2008 5:52 pm) pocity (Oct 27, 2008 6:00 pm) and 1 more...
#170 of 221 Re: 98 Blazer [ghovatter] by pocity Oct 26, 2008 (10:28 am)
Replying to: ghovatter (Oct 26, 2008 10:09 am) Sounds to me like it is either the Torque Convertor or the TCC Solenoid if it only does this when in gear. Replies to this message: ghovatter (Oct 27, 2008 5:52 pm) pocity (Oct 27, 2008 6:00 pm) ghovatter (Oct 31, 2008 5:33 pm)
#171 of 221 Re: 98 Blazer [pocity] by ghovatter Oct 27, 2008 (5:52 pm)
Replying to: pocity (Oct 26, 2008 10:28 am) Thanks, I will pull the trans this week end, oh joy. Replies to this message: pocity (Oct 27, 2008 6:00 pm) ghovatter (Oct 31, 2008 5:33 pm)
#172 of 221 Re: 98 Blazer [ghovatter] by pocity Oct 27, 2008 (6:00 pm)
Replying to: ghovatter (Oct 27, 2008 5:52 pm) Before you drop the tranny disconnect the electrical harness going to it and see if it still shudders. If it sounds normal than it is the TCC Solenoid. No need to drop the trans just drop the pan and change the internal harness and TCC Solenoid. If it didn't change than it is the torque convertor. Either way I would replace the solenoids and harness. Replies to this message: ghovatter (Oct 31, 2008 5:33 pm)
#173 of 221 Re: 98 Blazer [pocity] by ghovatter Oct 31, 2008 (5:33 pm)
Replying to: pocity (Oct 27, 2008 6:00 pm) I will do that.   Thanks Greg
#174 of 221 is it a tranny problem? by cargirllearnin Nov 06, 2008 (12:20 pm)
Hi, I'm a girl and know nothing about cars. So, that said, my 98 blazer just started lurching when I need to go forward after a stop sign, etc. It bucks and is uncomfortable to me and the kids. Plus, it won't get up to highway speed anymore. It's an automatic that feels like the gears haven't shifted and it's runnign too low. I just had the oil changed at the dealership, and they topped the fluids. Could they have overfilled something? Is it a transmission problem? (It idles fine when not actually moving.) I've also been told it could be a clogged fuel filter. What do y'all think? As I said, I'm a total girl about this: I knwo nothing! I nee dto have some idea before I take it somewhere so I don't get reamed by a shop. Any help is MOST appreciated! THANKS! Replies to this message: pocity (Nov 06, 2008 12:35 pm) jlflemmons (Nov 06, 2008 8:36 pm)
#175 of 221 Re: is it a tranny problem? [cargirllearnin] by pocity Nov 06, 2008 (12:35 pm)
Replying to: cargirllearnin (Nov 06, 2008 12:20 pm) It sounds to me like it is your transmission valve body. There are a couple of solenoid valves that wear out on these tranny's and causes your type of problem. Do you have a check engine light? If so have the codes read at an auto parts store. If you have a 1860 code then it is more than likely these solenoids. If that is your problem have the valve body replaced along with the wiring harness inside the trans.
#176 of 221 Re: is it a tranny problem? [cargirllearnin] by jlflemmons Nov 06, 2008 (8:36 pm)
Replying to: cargirllearnin (Nov 06, 2008 12:20 pm) If this problem began immediately after you had the car serviced, take it back and have them carefully look for displaced hoses, electrical connections, that sort of thing. There are numerous sensors that are feeding information to the drivetrain computer, and a bad connection can really cause havoc.   Based on your description of the symptoms, the first place I would look would be on the MAF connection in the air intake. They would have pulled this apart to check the air filter and may have dislodged the connector.

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