Hard shift to first
Thread Starter
Instructor
Joined: Nov 2007
Posts: 239
Likes: 19
From: Tuscumbia AL
Hard shift to first
Recently bought a '93, my first vette. It's a 6 speed manual. Sometimes when I shift into first it doesn't shift all the way and I get a grinding noise. I'll re-do the clutch pedal (release, shift to neutral, depress clutch again) to see if it will "reset". Sometimes it works and sometimes it takes more fiddling around.
Anyone experienced this? ALso, the manual says I don't need to change the tranny fluid. I would like to change out all fluids since I just bought it so I'll be able to mnitor conditions. Has anyone else changed the tranny fluid? Is there fluid up at the shifter?
Anyone experienced this? ALso, the manual says I don't need to change the tranny fluid. I would like to change out all fluids since I just bought it so I'll be able to mnitor conditions. Has anyone else changed the tranny fluid? Is there fluid up at the shifter?
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
First off check your clutch's hydraulic fluid. The reservoir is located under the PCM.
Yes, you can change the tranny fluid. You will need a 17mm hex wrench and 3 qts of oil. The trans has a fill plug located on the side and a drain plug located on the bottom. Remove the fill plug first.
Yes, you can change the tranny fluid. You will need a 17mm hex wrench and 3 qts of oil. The trans has a fill plug located on the side and a drain plug located on the bottom. Remove the fill plug first.
Safety Car
Joined: Oct 2007
Posts: 3,816
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From: :45 minutes from everywhere / E-I-E-I-O
Maybe don't change the fluid yet, without checkin' the clutch hydraulics, and the tranny shift linkage, tranny mount, and a few other visuals.
It doesn't seem likely that gear fluid is the problem (although possible) - but I'm guessin' synchros...
That's my
It doesn't seem likely that gear fluid is the problem (although possible) - but I'm guessin' synchros...
That's my
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
There is no tranny mount. But, it is bolted to the driveline support beam.
As for shifter linkage. There is only one non-adjustable shaft.
For trans oil. Some use the GM 5W30, some use BMW Castrol 10W60, Amsoil and a few other also make trans oil for our ZF6's. I'm currently running the BMW 10W60, but would like to try the Amsoil.
As for shifter linkage. There is only one non-adjustable shaft.
For trans oil. Some use the GM 5W30, some use BMW Castrol 10W60, Amsoil and a few other also make trans oil for our ZF6's. I'm currently running the BMW 10W60, but would like to try the Amsoil.
Melting Slicks
Joined: Dec 2004
Posts: 3,284
Likes: 51
From: Jacksonville, FL
St. Jude Donor '08 thru '26
just a thought....
......I would say to go to zfdoc.com and read up in the Q & A section. Your description is fairly typical of an issue with the clutch hydraulic system.
Try to keep the vette parked till you start work on the project. The noise you hear is the dog teeth on the synchros.....not good to use the car in this condition.....JMHO.
You probably have enough fluid in the system, but the seal on the slave piston and / or the seal in the clutch M/C is worn out and you loose hyd pressure....if you pump the clutch pedal sometimes you can work up enough to get the fork to move enough.....if you find that you are low on fluid, then you need to find the leak. Refill the M/C reservior in that case but plan on buying parts anyway. It's probably about $300.00 by now for the hose, slave & M/C and a pint of GM fluid.
This isn't a hard job but it's time consuming....alot of tight places that you have to work in is what makes it tedious. Bleeding the system will proly take longer than swapping out the parts. If you need a step by step on this post up and we can give you the low down on this repair.
Tom
Try to keep the vette parked till you start work on the project. The noise you hear is the dog teeth on the synchros.....not good to use the car in this condition.....JMHO.
You probably have enough fluid in the system, but the seal on the slave piston and / or the seal in the clutch M/C is worn out and you loose hyd pressure....if you pump the clutch pedal sometimes you can work up enough to get the fork to move enough.....if you find that you are low on fluid, then you need to find the leak. Refill the M/C reservior in that case but plan on buying parts anyway. It's probably about $300.00 by now for the hose, slave & M/C and a pint of GM fluid.
This isn't a hard job but it's time consuming....alot of tight places that you have to work in is what makes it tedious. Bleeding the system will proly take longer than swapping out the parts. If you need a step by step on this post up and we can give you the low down on this repair.
Tom
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Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
AMSOIL Synthetic Synchromesh Transmission Fluid (MTF)
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