This may be a dumb question, but I’m not a clutch expert by any means. Looking for some advice before we dig into this.
My son has a 87 GMC 1-ton with a 350 and 4-speed. We put a new motor in it last year and replaced the clutch at the same time since the motor was out. It’s a hydraulic clutch.
He’s put a few hundred miles on it with no issues since we did the motor swap. Last night when he was driving to our house he was going to downshift for a corner and it wouldn’t go into gear. He ended up leaving it at our place and getting a ride home.
Here’s what it’s doing, when the engine is not running you can push in the clutch and easily shift in any gear. When it’s running it will not go into gear like the clutch is not disengaging.
Before we push it in the garage to look at it, is it possible that the slave cylinder is shot and not disengaging the clutch? Why is it only doing this when the engine is running? What else should we be looking for?
Years ago I had a 85 S-10 with a 350 and Muncie 4-speed with a hydraulic clutch that had similar problems and it ended up being the slave cylinder. But, I could still get it in gear when the slave cylinder went out and limped it home. This thing absolutely will not go into gear when it’s running.
Any advice? We’ll probably dig into this tomorrow or Sunday.
My son has a 87 GMC 1-ton with a 350 and 4-speed. We put a new motor in it last year and replaced the clutch at the same time since the motor was out. It’s a hydraulic clutch.
He’s put a few hundred miles on it with no issues since we did the motor swap. Last night when he was driving to our house he was going to downshift for a corner and it wouldn’t go into gear. He ended up leaving it at our place and getting a ride home.
Here’s what it’s doing, when the engine is not running you can push in the clutch and easily shift in any gear. When it’s running it will not go into gear like the clutch is not disengaging.
Before we push it in the garage to look at it, is it possible that the slave cylinder is shot and not disengaging the clutch? Why is it only doing this when the engine is running? What else should we be looking for?
Years ago I had a 85 S-10 with a 350 and Muncie 4-speed with a hydraulic clutch that had similar problems and it ended up being the slave cylinder. But, I could still get it in gear when the slave cylinder went out and limped it home. This thing absolutely will not go into gear when it’s running.
Any advice? We’ll probably dig into this tomorrow or Sunday.