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View Full Version : Shifting issue in higher RPM's in 07 Mustang


USMCPONY
10-18-2011, 10:07 PM
Around 4k rpm's and above it is nearly impossible to shift. Tranny is stock with the exception of Spec stage III clutch, pressure plate and aluminium fly wheel. Every so often while I'm at a dead stop the tranny won't go into reverse. I've never had an issue like this on any of my Mustangs. Has anyone had this problem? If so how did you solve it.
svtmofo
10-18-2011, 10:16 PM
How long has the new clutch and flywheel been installed? Does it grind like a syncro would or like the clutch isnt even engaged?
USMCPONY
10-18-2011, 10:24 PM
It's been in for about 3k miles. MD did the install. It doesn't grind it just won't go into gear. For example If I shift from 2nd to 3rd it will just go into neutral and won't allow the shifter to engage any farther. It almost feels like something is blocking the shifter from going into gear. Once this happens I have to leave it in neutral until the rpm's drop to idle wait a few seconds and it will allow me to put it into gear.
blown96cobra
10-18-2011, 10:51 PM
Sounds like a clutch adjustment issue or the bellhousing bolts are loose.
USMCPONY
10-18-2011, 10:55 PM
Modular depot did the install. I'm assuming they did everything right. Or would the clutch need a readjustment after 3k miles?
Mista Bone
10-19-2011, 03:28 AM
sprung or unsprung?
USMCPONY
10-19-2011, 05:31 AM
sprung or unsprung?

Im not sure what you mean by that.
bobtsgt
10-19-2011, 06:54 AM
sounds like the clutch since you have to wait for the RPMs to drop. Check your shifter to see if the positive stops backed out any. Also try shifting while driving from 1st to 2nd to 4th (with the clutch in) then to 3rd.
cstreu1026
10-19-2011, 07:39 AM
After seeing all the issues 05YellowGT had with his car I would say the problem is likely in the hydraulic system for the clutch.
svtmofo
10-19-2011, 09:36 AM
After seeing all the issues 05YellowGT had with his car I would say the problem is likely in the hydraulic system for the clutch.

Thats what I was gonna suggest as well. Possibly the throwout bearing
05yellowgt
10-19-2011, 09:47 AM
How does the pedal feel? What shifter do you have? Do you have stock motor mounts? Does the car lurch forward when at neutral with your foot not on the brake when you put the car into 1st gear?
USMCPONY
10-19-2011, 03:48 PM
Stock shifter and motor mounts. Tranny feels perfect except during high rpm's. This is under slightly heavy acceleratation. Clutch pedal feels like it was before upgrading the clutch. Car doesn't pull at all while clutch is engaged. I can shift into any gear flawlessly (except reverse sometimes) while stopped or normal driving.