LS1DER

iTrader: (6)

Since we've been getting colder weather my M6 has starting grinding when I try to shift to 5th. If I drive the car for 10-15 minutes then it will shift fine. I'm assuming the transmission just warms up. So my question is, why can I not shift into 5th, without grinding, when it's cold?

RE AND CHERYL

iTrader: (31)

My LT1 T56 used to do that a little bit going into 2nd. I figured it was just worn syncros being that the trans had 110k+ on it.

89Formulaws6

iTrader: (52)

mine does that only going into 5th aswell, weird...

jared1993

iTrader: (2)

Me too with the 5th........ Same symptoms. Only started since it's been getting colder out and after some driving it's back to normal. Deff weird Or maybe a part is on it's way out?

red_ryderSS

iTrader: (1)

Don't mean to hijack, but if I shift to fifth, keep the clutch engaged and put it back in fourth, it grinds like a sumbitch and makes me go back to fifth. Only 66xxx miles too.

cam

iTrader: (9)

Mine grinds fourth EVERY single time for the first shift of the day and sometimes two or three. After a few minutes warm up its fine. Not that it takes much warmth its mighty cold up here. Toasted syncros my guess

LS1DER

iTrader: (6)

I think that's what I'm leaning towards too. I changed the slave cylinder fluid, because it looked like oil, and this weekend I'm going to change the tranny fluid just to see if that helps.

LS1DER

iTrader: (6)

well I changed the tranny fluid this past weekend and it still grinds. It does seem to shift smoother though. I'm assuming synchros going bad?

Ws6man2000

iTrader: (24)

ya thats exactly what it is.... i just did a heads and cam swap on my car and the tranny/clutch are dying does the same exact thing regardless of temp.. Do you hear any type of bearing noise coming from the console?

Zero4488

iTrader: (10)

Mine grinds 2-3-4 when it's cold....and putting it into first can be a hassle as well....

thesource

iTrader: (60)

I've seen several cases where cold weather effects the shifting issues or clutch issues with standard transmissions . I would start with a fluid change and bleeding the clutch . If that does not fix it , you will probably need the transmission looked at or replace the slave cylinder depending on what the issue is .

prelude_93vtec

try changin the tranny fluid. if a lot of you are having teh same problem, it might be the factory gear oil.

BlackScreaminMachine

iTrader: (17)

39k miles, Original gear oil. A lil notchy in 3rd and 5th when really cold as soon as the car goes about a few miles down the road its fine. I short shift anyways so i dont ever really see 3rd and 5th but I have noticed a diff.

LS1DER

iTrader: (6)

No I don't hear any noises out of the ordinary.

I have changed the fluids.

I guess it's time to take it somewhere and get it looked at.