L3FTYZ06

My transmission on my Z06 Corvette is physically popping out of gear when you try and accelerate. All other gears work great, including 6th, it just pops out under load. If you hold it in it works. Any idea whats wrong?

MUSTANGBRKR02

iTrader: (91)

Could be a broke key in the 5/6 syncro.or a worn syncro.

L3FTYZ06

So you would need to replace the whole synchro then?

killagt

iTrader: (3)

Did you ever change out the fluid ?

L3FTYZ06

i havn't no. I just bought the car 10 months ago and parked it for the winter 7 months ago. So I've only put 2500 miles on it. The car has just about 100,000 miles on it tho.

killagt

iTrader: (3)

100k miles if it still factory fluid, its over due. When ever I bought a car, wat ever the last owner told me, I change it out anway, drain the fluid out the put in new fluid, hope you dont see any peice of syncro coming out. if it does, its a very bad sign.

MUSTANGBRKR02

iTrader: (91)

if it is poping out of gear it is likely that the syncro is or keys are broke. Fluid change will not do anything. Most likely the broke piece is stuck to the magnet.

killagt

iTrader: (3)

Change the fluid anyway, it really easy on a manual. might as well change out rear diff with red line gear oil too.

bigj2717

iTrader: (15)

A fluid change will not fix a broken syncro. You need to pull out the trans and replace the syncro

L3FTYZ06

K, so I've never done a tranny before...do you have to change the whole synchro then? Or just change out a gear or sumtin in the synchro?

MUSTANGBRKR02

iTrader: (91)

That is a waste of money. The problem needs to be found and corrected.

L3FTYZ06

K so if I take this whole tranny apart tho, do I need a whole new synchro or can I purchase like a synchro gear, or is there such a thing? Anything else that I would need while it's apart?

MUSTANGBRKR02

iTrader: (91)

If it is just 5th you want to fix then you could probably just remove the tailhousing and do a new 5/6 syncro which includes springs and keys. Then i would do the blocker rings. But if it is apart you might aswell build the rest of it.

LS123

iTrader: (11)

On Corvettes, the diff is attached to the trans. It will be a major undertaking (need to remove the rear cradle to remove the trans/diff together) to do this yourself. Have a shop do it for you unless you have done this before or mechanically inclined.

MUSTANGBRKR02

iTrader: (91)

Missed that. Assumed it was a f-body. Yes removing that cradle is a pain.