Last post on Feb 22, 2008 at 10:00 AM
You are in the Chevrolet Impala
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Chevrolet Impala, Auto Repair, Sedan
#38 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [gzbenhur]
Jun 29, 2006 (10:27 am)
This reminds me of the transmission on the Chevrolet Celebrity and the Chevrolet Lumina. It very well could be the Torque Converter Clutch (TCC) Solenoid, located in the outer casing of the tranmission of the driver's side. There is a gasket that goes bad, allowing fluid to leak into this outer compartment which is otherwise dry and allows the solenoid to work correctly. This outer compartment/casing ends up filling with fluid and subsequently shorting the TCC Solenoid. The end result is a shudder when decelerating off of the free way and the vehicle even dying at idle at a red light, etc.
To isolate this problem, simply unplug the TCC Solenoid, which usually has a connector going into the outer transfer case since it is electronically operated. The only thing you will miss out on is the economical mode the transmission provides above 55mph.
I have provided a couple of links to further explain this phenomena. The TCC solenoid from GM including the gasket are about $30-40. You can do it yourself but it can get messy as Transmission fluid will roll out of the case in order for you to repair and replace.
If you are feeling extremely lavish, you can always buy a new transmission but this isn't really necessary.
DTC P0742 TCC System Stuck On 3.8L
Go to http://www.NHTSA.gov for info on this problem found on a Malibu:
TSB #020730039E -- FIRM TRANSMISSION SHIFTS, SHUDDER/CHUGGLE, TRANSMISSION WON'T DOWNSHIFT ON DECELERATION, SERVICE ENGINE SOON LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE P0742 SET. *TT UPDATE. *TT (NHTSA ID #10004756, AUGUST 01 2005)
#39 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [larcone]
Jul 05, 2006 (4:59 am)
Thanks Larcone, you gave all the answer to this problem.
The Chevy dealer did diagnosis by Tech 2, found the TCC solenoid problem. The dealer wants $880 to replace the solenoid because the long hours to take the stuffs apart. It looks like a huge job to open the transmission side case cover after I read the service manual, cause you need some special tools to hold the engine and take transaxle apart.
Most of my driving is on highway so I still want to spend the $880. Impala is a nice car, good size and gas mileage, but the transmission is a pain in the ass.
#40 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [gzbenhur]
Jul 05, 2006 (7:54 am)
You can always just disconnect the TCC Solenoid by disconnecting the wiring harness on the outside of the vehicle. You won't get the super cruise energy efficiency at highway speed but you will eliminate the problem for the moment.
I just looked at all of the crap you have to do to replace anything in the side case cover. What a joke. Chevrolet has just officially turned into a joke. On the older Chevy's, you could have this done in under two hours with parts(TCC Solenoid & Case Cover Gasket) costing less than $50. If you have tools and are the slightest bit proficient, you can still do it yourself. I am and I would still do it myself. If you take your time and fully prepare you can save some real money. See my links below and good luck. Don't let them WIN!!!
For GM parts quotes and a live database and very competitive parts prices, go to http://www.rockauto.com
Lastly, and this is for the benefit of everyone reading this forum. I recommend you try any one the links below for a GM SERVICE MANUAL of your VEHICLE. It is such a small investment and a complete set offers about 4000 pages of information concerning your automobile from head to toe. It is detailed down to the last screw and how tight it should be tightened during reassembly. It has troubleshooting guides for everything. Unlike Haynes and Chilton's, these manuals are written is very plain English and come complete with illustrations. The used ones on eBay are great and all you need to do is one or two repairs to get your money back and from then on you can save lots of money.
1. There are three full manuals that make a COMPLETE SET of the IMPALA Service Manual from 2000 thru 2005. Make sure there are three books with any set that you buy on eBay.
2. All of the 2001 thru 2005 manuals are essentially the same with little or no changes between each year. The 200 Impala Service Manuals are white with ONLY two volumes and I use this for my 2002 Impala. It's great so far. Try to stay away from the GM Service Manuals on CDROM unless you are technically proficient on computers and have a decent system with higher than average resources.
eBay SEARCH STRING:
(shop,service) (2000,2001,2002,2003,2004,2005) impala
http://search.ebay.com/shop-service-2000-2001-2002-2003-2004-2005-impala_W0QQcat- - - - - refZC5QQfclZ2QQfromZR7QQfrppZ200QQfsooZ1QQfsopZ3QQnojsprZyQQpfidZ0QQsacatZQ2d1QQ- - - - - satitleZQ28shopQ2cserviceQ29Q20Q282000Q2c2001Q2c2002Q2c2003Q2c2004Q2c2005Q29Q20i- - - - - mpalaQQsofocusZbs
In the event that you must have a NEW service manual for your GM car, then go to http://www.helm-inc.com
#41 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [larcone]
by Mr_Shiftright HOST
Jul 05, 2006 (9:17 am)
Thanks for posting all the helpful info!
That helm link doesn't look right though.
#43 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [larcone]
Jul 06, 2006 (8:40 am)
">link titleHere is the service manual link:
Tried www.rackauto.com but could not find TCC solenoid. The Chevy dealer appointment is next monday. I really hope Larcone is running a garage near me. I tried to replace timing belt on my 2000 Camry, but failed to take off the crankshaft pulley bolt (22mm bolt). I am some kind of scared to do auto jobs.
#44 of 128 Re: DTC P0742 ON 2003 IMPALA 3.4L [gzbenhur]
Jul 07, 2006 (5:43 am)
First of all, it is http://www.rockauto.com and not 'RACKAUTO' so that no one else on the forum is misled to the wrong site.
Two, I just looked for the Solenoid and it says 'solenoid' in the parts selection tree, BUT it disappears after you select it. So the Rock Auto site is hosed for the moment.
CHEVROLET > 2003 > IMPALA > 3.4L > Transmission-Automatic > Solenoid
If you will call your GM dealership and ask for parts, you will find that the parts man can give you able price quotes for this part. The TCC Solenoid and the corresponding Transmission side case GASKET are all that is needed. I did this work on a Lumina as recently as a few years ago and these parts were about $38 or so.
Third, I agree that this job is not for the inexperienced. In years past, this used to be a lot simpler. To give yourself some time to decide, you can disconnect the TCC Solenoid by disconnecting the wiring harness for it just outside the Transmission case. I don't have the manual in front of me but this might not work in that Chevrolet has also two other solenoids inside this case area, that being the 1st-2nd shift and 2nd-3rd shift solenoids. So, even if you do get it apart, you may find that the TCC Solenoid is bad because of fluid contamination.....but that contamination may be a direct result of the one of the other two solenoids that will need replacing in order to prevent the dry side of the transfer case from filling up with fluid.
Noting your concerns, here is what I would do since you seem more predisposed to let a mechanic do it for you:
1. See if your car is still under warranty. After all, it is a 2003.
2. Ask the dealer for the Chilton hour-labor rating for this job. Chilton's make a manual that details what the labor rate should be for every job. This, combined with parts, will give you an idea of what the cost will be. I can't see more than 5 hours for this and parts are even less. You do the math.
3. I would be very reluctant to let any mechanic outside of a GM dealership do this work. The GM mechanics are well trained and they have the parts to get it all done right. You never said who gave you the quote but you might find a better deal at a dealership.
I'd be interested to know what you found out. I believe that $800 for this job is highway robbery but at least forces you to get two more price quotes to see if it is in line with the original quote.
#45 of 128 Intermediate Steering Shaft TSB
Jul 17, 2006 (6:50 am)
To those out there still having issues with the Intermediate Steering Shaft, GM has revised the TSB. I don't know if that automatically means they'll cover the repair but I thought I'd pass along the newest info.
Thu, Jun 8, 2006 Thu, May 25, 2006 01-02-32-001G Steering - Clunk Felt and or Heard From Front End on Turns
#46 of 128 Re: Intermediate Steering Shaft TSB [quietpro]
Jul 18, 2006 (6:51 am)
GM will not cover the repair if you are out of warranty. This issue started with the 2000 Impalas. They indicate that this is a maintenance item now for those with older Impalas. This is about their 4th attempt at trying to resolve this issue.
#47 of 128 Re: Intermediate Steering Shaft TSB [charts2]
Sep 13, 2006 (10:45 am)
Interesting, if this is a maintenance issue, why don't they mention in the manual as a service requirement every 10,000 mile. I have had the shaft greased twice and replaced one time and am still having the same problem again. I love this car, but GM does some stupid thing, such as not replacing a defective part or solving the problem. To claim it's a maintenance issue is why people don't buy GM again.