I have a 2011 Grand Sport MT and for the second time my shift **** will now rotate/spin on the shaft even though the set screw is tight.

Dealer replaced shift **** in 2012 under warranty and everything fine until car now out of warranty 6 months.

Any idea why the **** can rotate even though the torx retaining screw is very tight (dealer actually loctited'ed it previously)? If so, suggestion for repairing other than replacing with aftermarket or new2 OEM shift ****?

 

Is the set screw going all the way into the threads on the handle? That's the only way I could see it spinning with the set screw in place.

Perhaps put something in the threads and check to see if a mark is made when you tighten it, if not try to find a longer set screw that will work.

You could also make sure that the handle itself isn't somehow spinning by taking the **** off and sticking something through the set screw hole in the handle and attempting to rotate.

 

Start off by pulling the shifter boot down, and then with the **** in hand, see if its the **** that is rotating, or if it the entire shaft that is rotating instead.

Just need to watch this video for a min to get the shifter boot downward off the **** to start with.

If it's the **** alone, then remove the side bolt, and make sure that that the bolt is a counter sink bolt to begin with, and the side channel counter sink in the plastic is still in good condition. Put a drop of Blue loctite on the bolt and reinstall it, with the taper part of the bolt seated well in the counter sink part of the shift ****.

Hence, the bolt just came lose since it was not loctite in place, and what is allowing the **** rotation on the shaft (read something that you can fix yourself very quickly).

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If the entire shifter shaft it rotating and not just the shifter **** on the shaft ,

Then the shifter shaft and top plate are bad, hence the index pins of the plate, and the slots of the shifter shaft pivot ball have grooved, and the entire shifter shaft with top plate needs to be replaced,

Or,

The shifter shaft top plate bolts are not tightened correctly and the entire top plate is moving on the lower shifter housing.

Or

The shifter lower housing bushings are worn out, or the side T-40 bolts of the lower shifter housing have not been tightened down correctly and it the entire shifter assembly that is rotating on the torque tunel bolting brackets.

In any case, correcting any of the above will require that the shifter needing to re-indexed/re-aligned.

 

Shaft does not spin, just the ****.

Torx retaining screw is TIGHT and previously Loc-Tite'd.

 

Pull the side bolt,the **** and chase the threads of the shifter channel for the bolt with a tap to make sure that the bolt is threading in all the way (read far enough in to sister the **** taper to the bolt, and to the side of the shaft tightly).


If the **** is turning on the shaft, then either the taper section of the side bolt is not mating up to the counter sink in the sides of **** to lock it down tight against the shaft, or there is a miss fit between the bolt angle to plastic recess is fits into the side taper section for the bolt is oblong'd.

To check this, just put the side bolt into the **** off the shaft, and make sure that the fit is snug into the **** side socket, and you still have threads showing inside the **** inner channel. Same with screwing the bolt into the shaft without the bolt, to make sure that the bolt can be threaded deep enough into the shaft to secure the **** correctly to begin with.

If the bottom of the **** is holding steady at the bolt, and it's just the top part of the **** that is twisting, then pull the ****, break out some masking tape, and spiral wind build up the shaft upper under where the ***** sits so the **** on the shaft is tight fitting on the shaft, and not like a coffee can on a pencil instead .







To add, are you sure that it just the **** and not the shaft? The upper portion on the shaft is part of the isolator, and could be even the upper isolator portion of the shaft that is rotating on the lower shaft section.



P.S. If we can not still solve it, then maybe time to just chuck the entire shifter assembly, and upgrade to a MGW unit instead. Hence the stock shifter assembly is craptastic, even at it best and still brand new!!!!
http://www.mgwltd.com/corvette_short..._shifter.shtml

 

OK, issue resolved.

I removed the shifter boot so I could better diagnose the problem. Turns out the whole shaft was spinning because the 21mm nut that secures the shaft into the shifter was loose. I indexed the shaft to the correct position and then tightened the 21mm nut.

Intersting thing is that my shifter shaft is not shaped or black like the one detailed in your pics, its silver like the shaft base (without the black shaft) in the bottom most pic.

I purchased my Grandsport used. Is it possible that there is an aftermarket shifter installed that allows connecting the OEM shift ****?

 

That sounds like you have a short throw shifter installed. Since you are using the stock **** it may be an MGW. The MGW has replaceable shafts (one for oem **** and one for threaded *****) that are held in place with a nut like you describe.

 

Did you manage to get a photo of the shifter with the boot removed?

The C 6 shafts/ ***** are the slip in kind with the side bolt that holds them to the shaft.

The C5 shafts/***** for after market are the thread on ball kind with a lower nut that jams against the lower **** to keep if from rotating on the shaft.

Or, could be that someone split a C6 OEM shifter apart like the below photo, used the bottom part of the shaft (silver part to the left) and then threaded the shaft top and did a shaft extension on it instead. Again, photo would help.

 

Dano523 has provided a link to the MGW website above. Click on it and compare your shaft and retaining nut to it. Sounds like your shifter is an MGW.

 

Time for a MGW Shift set up.

 

Obviously an aftermarket stick. There is no 21mm fastener on the OEM

 

I am trying to remove the shift **** but my shifter does no have the screw below the handle. Bought the car brand new and have made no mods.

Dave K.

 

You have to lower the shift boot down to see the side bolt that retains the OEM shifter to the OEM shaft.

Watch the video and note how you have to turn the silver ring on top of the shifter boot ring counter clockwise to index it from the **** track slots first, to lower it down to see the side bolt on the shifter ****.

If you have a 05 to 07, then the top of the shifter boot will not have a silver ring and you just pull the top of the boot down past the retainer lip on the ****.
Early C6 shift **** for no silver ring top shifter boot,


C6 late model for the shifter boot that has the top silver top ring.




If you get the silver part of the boot down off the ****, or boot down on the older models and see no side bolt, Post a photo so we can see the shaft/****/boot to see if you do in fact still have the OEM shifter and **** to begin with.