Hello, I have a 2005 Vette / Z51 package 6 speed, when I speed shift, and it doesn't have to be a full power shift, there is, hard to explain, a clunk felt in the shifter. As a result an easier shift first to second becomes hard to do, missing the gear has happened. Has anyone had this problem or know if an adjustment has to be made? Any Help Please! would be appreciated, Thank You

 

With that minimal info my first thought goes to a loose, shifter alignment issue, likely the shifter box and likely worn shifter box bushings and/or the bushing the shift rod/rail moves through in the torque tube.

You don't say how many miles on the car but worn shift box bushings with changing shifter alignment is somewhat common. Those things do wear out and everything loosens up.

Only a possibility. If you have more descriptive detailed info on the symptoms post them. Wait and see what others say.

Just for info here is a discussion about a shifter that actually got real loose:

http://forums.corvetteforum.com/c6-t...er-wobble.html


And just for more info, here's a video from MGW showing how to replace the shifter box with their new improved unit but it is a good education so you know what people are talking about:

 

The vette has 18,000 miles, the shifter does not fell lose, not sure what other info is needed.
Thank You

 

I know this is obvious but do you have a skip shift elimiator installed? Almost sounds like you're forcing past the 1>4 override.....

 

Thank You so far that sounds like the best guess! Need to find out if I can shut it off, it came stock with car.

 

you should take the shifter box out and inspect it. it may be out of alignment, bushings melted, torn .... DO NOT force it or BAD THINGS WILL HAPPEN if you miss a gear. you may also want to practice shifting while at home.

 

it CAN be shut off,,,dynot tuners can do it for you...I too have an 05 manual, and from time to time it gets tricky to shift...sometimes it helps put it in 3rd gear first and then to 1st..idk why but works for me when stopped at a red light..

also, i saw major improvements when i changed my tranny and differential and clutch fluids...i went with RedLine products

 

Cags 1to4 shift bypass can be resolved at the fuse block under the hood.

http://xse.com/leres/z06/cags.html

Next, check the color of your clutch fluid in the reserve tank. If its not clear or a very light amber, then change it out. Although the clutch is self adjusting, if the fluid is contaminated, it can cause the clutch to not fully disengauge when you have the pedal all the way down.


From there, although the trans is sync'd, it will still take a few milisconds for this to happen. Here, change the trans fluid out to something like Redline fluid, which will smooth out the shifting a great deal.

Lastly, pull the center consoul and check the shift linkage. Start with the rubber bushing to make sure that they are not cracked and causing too much box movement during a shift, and then readjust the shift linkage as well.

The down and dirty to shift linkage adjustment, loose the two large torque bolts on the right hand side of the box, put the shifter in to neutral, then push the front center pin down to lock the shifter shaft in place. Now take a look at the location of the torque bolts to the center of the bushing. If the bolts are too far forward or back, then loosen the shifter shaft bolt that connects the box shaft to the trans shaft linkage, move the entire box forward or back, tightening up the shaft linkage bolt, then tight up the box torque bolts.
Note, don't forget to pull the indexing pin back up to unlock the shifter.

Also to point out, the stock shifter leaves a lot to be desired with all it free play. If you are going to trouble of getting that deep into the shifter, would be a good time to change the shifter out with a MGW shifter instead.

 

Put an MGW in it. The mount bushings on your stock box are probably fried by now from age and heat (common problem) allowing misalignment of the shifter. Spend the money on an MGW; you'll never regret it.