C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failure - NCRS Discussion Boards

C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failure

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  • Richard M.
    Super Moderator
    • August 31, 1988
    • 11302

    C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failure

    Should you carry a jack in your C6(or later), even with Runflats?

    The other day was my wife's birthday. We decided to take the 1+ hour drive along the Florida East Coast Rte A1A in my 2007 Automatic Transmission Coupe to get takeouts from our favorite Italian restaurant, return home, and have a nice celebration dinner at home.

    Well, timing was off and the C6 Corvette Shifter Cable Satan got me at the wrong time. 5 minutes away from our destination, but thankfully over a hour before our scheduled pickup time, I decided to stop at a gas station to get some bottled water. We were going to go further south for a continued half hour cruise along the Intracoastal waterway after crossing back over to the mainland, then turn around and back north to pickup the food.

    I Pulled in the gas station parking spot and put it in reverse to get better alignment. When I put it back in Drive...... nothing. Shifter was flopping loose. I was stuck in Reverse!

    After a few expletives I settled down and set the E-Brake. I was not going to allow this situation ruin her day. I know how to fix this as I had the same "stuck in gear" problem a few years earlier and had the repair knowledge. Either the Shifter end or the trans end cable was disconnected. I wasn't sure at this point. I dared not shut the engine off. If I did, since not in Park or Neutral, I knew it would not allow restart and would be stuck where it sat, in the hot sun.

    I decided to back up back onto A1A, guided by a landscape guy who was there working the grounds, and I did a loop back into the lot and put it in a spot that had shade. It was 90* and humid out. I set the E-Brake and got out. Here you can see the reverse lamps still lit up, and if it let go, a big barrier to stop it from moving as safety insurance.


    I had a plan, using my jack to change gears. I carry this jack, a breaker bar and lugnut socket, a tire repair kit and a 12V air compressor and a can of flat-fix. My tires are not run-flats. Little did I know the jack would come in handy for another purpose. I would have to get under the car to manually shift the car into Drive to get back on the road. I went to open the trunk via the dash button and button above the rear license plate to get my jack and tools, but since in Reverse, it wouldn't open, only allowed in Park. I used my key to open the trunk at the key slot above the license plate and got my needed items. If I didn't have a key I'd have had to crawl in from the cabin and hand her the items.

    I had safety in mind as a priority. I told her I was going to jack it up so I started looking around for wheel chocks and safety stands/blocks to put under the car. She noticed a group of broken concrete curbing nearby so I grabbed several large pieces. I put one in front of the front tire. I took my electric jack and placed it under the rear jackpoint where the puck normally resides. Ran it up high enough and put another block under the rear diff framework as a safety stand.


    Now....... I then shut the engine off and planned to shift to Neutral for a subsequent restart. But "Shift to Park" on the DIC cannot be done so car is still powered with engine off. It gets its signal from the transmission AND the shifter. BTW, there is no automatic power-off timeout in this scenario. The battery will go dead if left this way for a long while, as I found out years ago when the shifter jammed in Drive due to a faulty shifter Brake pedal interlock pawl fault. At least when that happened the car was drivable to get home. I thought it would auto-off then, but it didn't.

    Checking the jack and my borrowed safety blocks were all good, I got under the car and saw the culprit. The cable bushing to the transmission lever pivot ball had disintegrated and was gone. With my long breaker bar I gave the lever one "click" forward to put it in neutral. When facing the lever, far right is Park, then one click forward is Reverse, then Neutral, Drive, Sport for each detent click.

    Here is the trans shift lever area above the left exhaust pipe. You can see the end of the cable between the left pipe and left fuel tank support shield.(photo taken later on lift for better view)


    Here is the lever and cable end. There should be a bushing in the open end, attached to the pivot ball.


    I got out from under the car. Now with her on the brake pedal and ebrake still set, she started the engine, now in Neutral. I then took my long breaker bar and from the rear of the car I reached under and located the lever. I gave it a light push one click forward. Now it was in Drive. She stayed put while I lowered the jack, put everything back in the trunk. She then let her foot of foot brake, car still stayed put with ebrake, then she got out. I got in, she got in on the other side, I released the ebrake, and we drove off.

    We made it over to pickup the food right on time. She got in Driver side and foot at brake pedal while I got the food but had to key open the trunk again, then we seat swapped again and took the hour drive back home without incident, albeit stuck in Drive, hoping no need for reverse. At home we unloaded the food and I drove into the garage properly positioned for the lift rise the next morning. I shut the engine, disconnected the battery Negative terminal and went into the house.

    We had a nice dinner to celebrate her birthday, while reviewing the entire escapade of our "nice" getawaydrive along the coast.

    The next morning I raised the car on the lift and replaced the cable bushing.


    All fixed. I used a 2x4 between the shield and pipe to open the area as it's pretty tight in there to work. I set the shifter and trans in Park to give the closest proximity for repair. The bushing attaches to the pivot lever ball stud first, rounded end out, then the plastic cable open end snaps over the bushing locking both in place. I used a bit of silicone grease on the inside and outside of the bushing to make it easier to snap them together over the ball stud. A pair of wide flat pliers and a small piece of thin wood against the plastic cable end side was used to protect the end.
    0917201042_Burst01_resized.jpg


    0917201043_resized.jpg


    Note the orientation of the cable end and orientation of the bushing with the small rounded end facing away from the lever.
    0917201047_Burst01_resized.jpg




    Here are 2 kits I had. I got these as spares several years ago when I had the shifter bushing problem(Link HERE). The Napa kit comes with 2 for the Corvette application. The Dorman kit only includes 1 for the Corvette application, shown at the bottom corners of each package in the photo below. Both kits have extra pieces for other makes/models.
    0917201007_Burst01_resized.jpg

    I'm thinking of adding two "safety" wires to the trans lever pivot end and tie them up under the car at hands reach for future cable fault "incidents". This would cover a fault at either end of the cable.

    Rich
    PS Unsure if the Manual trans cars use a similar cable bushing arrangement. If so, those apply here too.
    Attached Files
  • Frank D.
    Expired
    • December 27, 2007
    • 2703

    #2
    Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

    You're something else Rich; all that pressure on wifey's birthday, working with a Rube Goldberg jacking setup, doing a "gravelback"adhoc repair under a running car and fighting the vehicle's "smart" safety computer brain and STILL took pictures. My hat is off to you guy...

    Comment

    • Duke W.
      Beyond Control Poster
      • January 1, 1993
      • 15610

      #3
      Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

      I'm glad I don't own a modern car. All those "safety nannies" are just ridiculous. How long did it take you to get the new bushing, and I wonder how long they will be available? A broken ten cent plastic part should not disable a car!

      Duke

      Comment

      • Richard M.
        Super Moderator
        • August 31, 1988
        • 11302

        #4
        Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

        Frank, I had to. You know the drill.


        Duke, I had the bushings. I keep one in the car and another kit at home. Most auto parts stores have them under the Dorman name. Napa also has their own too. If the shifter end bushing broke, I could fix it in a short time as I've done it before, but back home. One could keep a Phillips and Torx driver for the console/glovebox removal, and socket for the shifter mount in the car to make the repair and get back on the road. The console and radio/hvac panel pops off and with some finesse that bushing can be changed. Probably a hour or 2 job for a rookie. Less for me as I've done it before. Or do what I did shifting manually and deal with the repair later.


        The rear cannot be done unless you have plenty of room under the car either on a lift or jackstands. I cannot see trying to do that one while stranded especially when the exhaust is so hot.


        I feel this is a design flaw. Terrible idea using plastic bushings that are exposed to heat, especially the rear at the trans which is directly above the left exhaust pipe. The cable ends are also plastic but it appears more tolerant to heat. My car was built in November of 2006 so these are now nearly 14 years old. BTW in order to change the entire cable, the exhaust and heat shield below the prop shaft tunnel(apx 40 screws) must be removed to access the cable, as well as removing the pieces to get at the shifter end.


        Rich
        PS edited the original post with info on the kits and their part #'s.

        Comment

        • Peter H.
          Very Frequent User
          • April 1, 1980
          • 223

          #5
          Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

          Rich. Check With Your Local Chevrolet Dealer To See If There Is A Quiet Recall . The Blue Oval Store Has A Recall On Their Shifter Bushings
          I Hope My Memory Chip Is Working Properly . Retired Now For A Couple Of Years !
          Great Initiative Doing The Roadside Repair . We Need Guys Like You On Our Road Tours .
          Peter

          Comment

          • Terry M.
            Beyond Control Poster
            • September 30, 1980
            • 15573

            #6
            Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

            Outstanding job in both the field repair and documentation. I am in awe of your skills.
            Terry

            Comment

            • Tom E.
              Very Frequent User
              • June 1, 2019
              • 448

              #7

              Comment

              • Richard M.
                Super Moderator
                • August 31, 1988
                • 11302

                #8
                Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                Peter, Great advice. I checked online but unfortunately nothing for the Corvette. It should be though! Next week I have a appt at my new GMC dealer for our 2010 Acadia to do a recall and special repair. I'll ask the Service Manager to inquire within.

                For the record, Chevrolet should have had a good-faith recall on this cable/bushing issue and a design change for the bushings. IMO it really is a safety hazard. Plus it was quite embarrassing when we broke down. Several people at the gas station complemented us on the really "Nice Corvette". I had to say.... "Thanks but it's broken, stuck in REVERSE"!

                BTW, Just to go a tad OT. The GMC Division is really coming through for me on the Acadia on a HID(High Intensity) Headlight issue, and I'm quite happy about it. They use a 3157 bulb for the Daylight Running Lights(DRL). Well, the DRL plastic housings have been melting from bulb heat and causing a open circuit on the bulb wires. In 2015 GM extended their coverage for 10 years/120K miles from delivery date. I just found that letter. I was angry at myself that I forgot about it.

                They're going to replace BOTH HID Assemblies for a reasonably low cost deductible. It would have been $0 but I took delivery 10 years and 2 months ago so just out. They could have flat out just said NO, "Sorry Too Late". Normally it's a $2,700 job. Each assembly lists for apx $1,200. The entire front fascia, bumper, grille, front wheels and inner fenders must come off to replace them. The Service Manager went to bat for me and got GM approval to cover it even though it's a bit beyond the date.

                Terry, Thanks

                Rich

                Comment

                • Richard M.
                  Super Moderator
                  • August 31, 1988
                  • 11302

                  #9
                  Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                  Rich,



                  Thanks Tom
                  Thanks Tom... Interesting you had similar issues on the 911. Maybe the same designer transferred between companies!!!

                  So, the tag letters are just randomly generated by the state and nothing specific. I have much respect for all of those that the tag represents and wanted to show it.

                  Comment

                  • Terry D.
                    Extremely Frequent Poster
                    • May 31, 1987
                    • 2690

                    #10
                    Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                    Like Tom I like to try and figure out license plates definitions. Yours?

                    Comment

                    • Ed D.
                      Very Frequent User
                      • December 1, 1990
                      • 329

                      #11
                      Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                      Does anyone know if Chev improved this plastic connection on later C6?
                      Ed DiNapoli
                      CNJ Chapter Past Chairman/Co Founder

                      1972 Targa Blue Coupe, Original Owner,
                      Duntov Award, Sam Foltz Award,
                      Founders Award, NCRS Gallery VIII
                      2011 Corvette Convertible
                      NCRS Presidents Award 2014

                      Comment

                      • Frank D.
                        Expired
                        • December 27, 2007
                        • 2703

                        #12
                        Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                        I would think that would be a recall or a service bulletin which can be researched, but I'm betting there's nothing about it..

                        This reminded me of the many times I've had a manual shifter "hang up" on my Dad's trade-ins on his used car lot where I laid under the car on a test drive working the shifter linkage from underneath by hand to get it unjammed.

                        As to modern car designs, I got a chuckle about the C8 hoods opening at moderate speeds and GM implying its a "user error"...and there is some contentious debate about it.

                        Comment

                        • Glenn B.
                          Frequent User
                          • June 4, 2008
                          • 76

                          #13
                          Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                          GOOD JOB Richard, can you share a picture of your jack and where you purchased it.
                          Glenn

                          Comment

                          • Richard M.
                            Super Moderator
                            • August 31, 1988
                            • 11302

                            #14
                            Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                            Originally posted by Terry Deusterman (11486)
                            Like Tom I like to try and figure out license plates definitions. Yours?
                            Terry, See post#9. Random for the state. But maybe we can make something up.

                            Originally posted by Ed DiNapoli (18386)
                            Does anyone know if Chev improved this plastic connection on later C6?
                            Ed, If they did something different there is no way to know because the bushing is not available in service. Dealers replace the entire cable when a bushing fails. I also don't think there would be a way to know if the cables now include any upgraded bushings as the part# would likely be the same. Only the print/spec of the cable would show it.

                            Originally posted by Glenn Butler (49107)
                            GOOD JOB Richard, can you share a picture of your jack and where you purchased it.
                            Glenn
                            Glen I don't recall exactly where I got it and when, maybe when I bought the car in 08 with 30k miles and it had non run flats then. Here is a photo. The case fits perfectly into a cargo net I have in the rear cargo area. BTW, other than testing it years ago this was the first time is got "functional" use.
                            0918200928b_resized.jpg

                            If you search the internet there are likely many others available.

                            Rich

                            Comment

                            • Richard M.
                              Super Moderator
                              • August 31, 1988
                              • 11302

                              #15
                              Re: C6 - You may need to carry a jack but not for tires, Auto Trans Shift Cable Failu

                              I have been researching information available regarding this (2007) GM Shift Control Cable. It appears there have been several variations over time and unsure what these variations consist of. There have been 3 different part numbers for the cable, most recent is GM Part# 20782446.

                              My research has indicated it is used on 2006 to 2013 Corvette(6 speed Auto Trans).
                              The 2005(1st year of the C6) uses a different cable as it is a 4 speed transmission. For reference I find 10352529 is the 2005 cable part#.

                              My research shows that 20782446 is superseded from 15888331 and 10347393. The part# change may mean some form of change in the specification for the cable itself, or possibly a part added, like a shipping retainer clip which can be seen below. I am guessing.

                              Here is a file photo of a cable found on ebay. Note that the red piece is just a shipping retainer for the adjustable end piece. This according to my 2007 CSM. It gets removed when installed on the car.
                              s-l1600.jpg

                              Here is another on ebay, which shows the box label. I was able to zoom in on the label. "Made in China"
                              s-l1600.jpg


                              Several of the online GM dealer based parts websites show different availability of the 20782446. A few below....



                              1 - gmpartsdirect shows availability of 20782446 but notes: "Special Order Part".

                              https://www.gmpartsdirect.com/oem-pa...cable-20782446



                              2 - gmpartsgiant shows no availability of 20782446 - "Discontinued".






                              3 - gmwholesaledirect shows only 1 left in stock.

                              https://www.gmwholesaledirect.com/oe...cable-20782446




                              4 - gmpartsprime shows no availability of 20782446 - "Discontinued".

                              Save on genuine GM 20782446, Automatic Transmission Range Selector Lever Cable Assembly for just $46.92 at AutoPartsPrime. We offer wholesale prices and lightning-fast shipping for your convenience!






                              It is possible that GM stock is running out and that the aftermarket has been taking over. The cable is available from many other suppliers now, but all of them show it as a "GM" part. I suspect that GM has sold the rights to the other manufacturers and has been licensed to use the GM label.

                              Websearch 20782446 cable Ebay, Amazon, even Walmart, but not Rockauto for some reason.

                              Rich

                              Comment

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