: 4th to 5th problems



charheep
12-26-06, 07:38 PM
Anyone has this issue? During "spirited" driving on empty roads, sometimes with a M3 falling behind me, I run out in 4th gear and then try to shift into 5th gear and the transmission just grinds. And I let out the clutch, which seems really really lite, and try again, and 5th gear still grinds. I coast for 10-15 seconds and everything works fine. Thankfully each time this has happened the race was over. I dont want to tell my dealer unless its something major. Any ideas or suggestions?

Thanks.

2005 V

BLACK_CTSV
12-26-06, 07:52 PM
You sure you're not hitting reverse? I've done that in the same situation...:hmm:

heavymetals
12-26-06, 09:02 PM
Reverse lockout solenoid was the problem with mine.

CTS-V420
12-26-06, 09:29 PM
I have hit that problem like 4 times. It sucks. In order for it to go in it seems like you have to granny shift it into gear. I havn't hit 130 in a lil so next tim I do it will be with the UUC. .. . Maybe that will delete the problem?

BLACK_CTSV
12-26-06, 09:38 PM
I have hit that problem like 4 times. It sucks. In order for it to go in it seems like you have to granny shift it into gear. I havn't hit 130 in a lil so next tim I do it will be with the UUC. .. . Maybe that will delete the problem?

I've got the UUC - still hit it.

heavymetals
12-26-06, 10:00 PM
I've got the UUC - still hit it.

I have the UUC also.

The shifter has nothing to do with reverse lockout.

Dennisscars
12-27-06, 01:00 AM
Were you over 100+ mph? I still contend that the reverse lock out is a two digit field so HAL sees x03 and opens the reverse gate.

Still waiting for Luna to test theory.. :showoff:

heavymetals
12-27-06, 01:11 AM
Were you over 100+ mph?

I was downshifting from 6th.

So no, not over 100.

I believe the lockout is supposed to work at any forward speed over a certain range, but I really don't think that it disables itself over 100 mph.

Dennisscars
12-27-06, 03:53 AM
Heavy, I thought yours was hardware failure so I would expect yours to have been "open" at all speeds.

I've found mine to be more likely to go into the reverse gate at over 100 (top of 4th at WFO) or between the speed at which you can go into reverse minus 100. However this is based on wild speculation.

Redline CTS-V
12-27-06, 07:03 AM
From the service manual:


Reverse Lockout

A reverse lockout system, consisting of a reverse lockout solenoid which operates a reverse lockout mechanism, is utilized to prevent shifting into REVERSE gear when the vehicle is moving forward at a speed of 5 km/h (3 mph) or more.

heavymetals
12-27-06, 01:55 PM
From the service manual:

There you are.

See if it locks out reverse at about 20mph.

If it doesn't, it's broken.

charheep
12-29-06, 04:20 PM
Thanks for th replies.
I have tried to shift into reverse during normal driving and cant. Havent tried at 100+ mph though. The clutch gets really light, so I thought maybe the stress and heat of a WOT run in 4th did something. I will run up to 100+ and see if granny shifting grinds the same way. I will let you know.

DILLIGAF
12-29-06, 11:32 PM
Thanks for th replies.
I have tried to shift into reverse during normal driving and cant. Havent tried at 100+ mph though. The clutch gets really light, so I thought maybe the stress and heat of a WOT run in 4th did something. I will run up to 100+ and see if granny shifting grinds the same way. I will let you know.
I used to have this same problem,solution?Treat 4th to 5th like 2nd to 3rd,I was scared shitless to miss 5th at high speeds.As it turns out, my apprehention was the problem.Hit it!,it will be there.Guaranteed!:cool2: