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#1 |
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I have a bracket car with a Jerico that I drive on the street. I know most of you have dedicated race cars but probably the most amount of manual transmission experience out of any drag racing class. So I was hoping to ask if anyone experiences release issues after your drivetrain gets good and heated after driving an hour or so? It's a mild grind and can be stopped easily by easing into gear. I also hold the clutch in for five seconds or more to let everything spin down. When I had the Jerico pilot bearing it would grind so bad I had to turn the car off and then put into gear. I currently run a GM bronze bushing and its night and day improvement. My bellhousing is aligned to perfection both parallelism and concentric. I don't believe it to be an air gap issue either. I'm thinking that it takes so little power to turn these transmission that my pilot shaft may be dragging.
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#2 |
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usually that is a sign of the clutch dragging a bit. check and make sure the disc slides easily on the input splines. Maybe a bit more air gap
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Mike Pearson 2485 SS |
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#3 |
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Sounds pretty normal to me. Thats just the way all of mine have been. I'm sure the clutch isn't disengaging all the way ,but I just dealt with it.
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5664 AA/SA 1970 NOVA |
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#4 |
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Pilot bushing could be dry and dragging or too shallow and catching on the input shaft. It is normal to grind if the clutch air gap is not wide. I used to put in low gear, use syncro's to stop clutch and transmission insides from spinning and then go to reverse.
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Adger Smith (Former SS) |
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#5 |
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What type of clutch are you using? A bronze pilot bushing will not last very long with a sintered iron disc, like a McLeod Soft Lok. The dust from the clutch disc is abrasive, and will chew up that bronze bushing pretty quick, and allow the input shaft to wobble around.
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NHRA 6390 STK M/S 85 Mustang |
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#6 |
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#7 |
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Thanks for the feedback, yea I dealt with it with my last combo for ten plus years. This combo is much better. I think removing the Jerico pilot bearing and going back to a bronze bushing made the difference. Sounds like it's pretty common.
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#8 | |
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Last edited by Weekiman; 02-23-2023 at 06:57 AM. |
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#10 |
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I know this is Hijacking the thread, But...I think the OP has his answer.
Has anyone used a 10,000 RPM brand multi disc metallic clutch with diaphragm? Looks like you shim the stand height to get it set up. (no instructions) I have a new one that came to me as a spare when I bought all of a buddies racecar Estate. Is it something usable or just old junk?
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Adger Smith (Former SS) |
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