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Strange transmission behavior- Help me diagnose

 
Old 04-30-2018, 07:35 AM
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Default Strange transmission behavior- Help me diagnose

After being parked for a couple of weeks I drove the car to the parts store (no boosting) and noticed when leaving it was difficult to get into gear. This was rolling backwards slowly down an incline and trying to get it into first. I immediately thought it was a leaky clutch master or slave cylinder since these are somewhat common on our cars. I pumped the clutch and stopped the rearward motion and it went into gear. Later in the evening I went to move the car in the driveway and noticed again it was difficult to get into forward or reverse. Messing with it, I determined that with it in neutral and the clutch released it seemed to be trying to push the car forward still. I'm suspecting the input shaft is trying to spin some other pieces within the transmission. I'm going to drop the trans oil and replace it and see if there is any extra metal. I can't recall which oil I used last because it's been awhile.

Has anyone seen this previously? Is this a failing internal bearing or bent fork issue?
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Old 04-30-2018, 08:28 AM
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Originally Posted by sixshooter View Post
After being parked for a couple of weeks I drove the car to the parts store (no boosting) and noticed when leaving it was difficult to get into gear. This was rolling backwards slowly down an incline and trying to get it into first. I immediately thought it was a leaky clutch master or slave cylinder since these are somewhat common on our cars. I pumped the clutch and stopped the rearward motion and it went into gear. Later in the evening I went to move the car in the driveway and noticed again it was difficult to get into forward or reverse. Messing with it, I determined that with it in neutral and the clutch released it seemed to be trying to push the car forward still. I'm suspecting the input shaft is trying to spin some other pieces within the transmission. I'm going to drop the trans oil and replace it and see if there is any extra metal. I can't recall which oil I used last because it's been awhile.

Has anyone seen this previously? Is this a failing internal bearing or bent fork issue?
Reminds me of this:

Edit: You can skip the first 2 minutes.
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Old 04-30-2018, 10:26 AM
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Yes, that sounds exactly like what is happening. Theoretically, I should be able to disassemble the transmission, push those two pieces back together with a press, and resolve the dragging issue. I wonder if there is a spot where a tack weld might be placed that wouldn't interfere with other parts and not remove the temper from the metal of any important surfaces?
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Old 04-30-2018, 10:37 AM
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I recall it being slightly more difficult to change gears at Road Atlanta in December. Nothing since then, but I've only driven it a little.
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Old 04-30-2018, 11:58 AM
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Originally Posted by sixshooter View Post
Yes, that sounds exactly like what is happening. Theoretically, I should be able to disassemble the transmission, push those two pieces back together with a press, and resolve the dragging issue. I wonder if there is a spot where a tack weld might be placed that wouldn't interfere with other parts and not remove the temper from the metal of any important surfaces?
Think so. Not sure how long it would hold (w/o a weld) if it's already come loose once. I guess you gotta pull it at least, so might as well start there and see where it leads you if you open it up?
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