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#1
05-26-2013, 04:01 PM
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Shifting problem
I am new to this site and trying to pick brains for the problem I have with my car. 1970 LS6, M22, new Hurst comp plus (set up on bench on tranny ) Shifts perfect while driving. When coming to a stoplight, put in neutral and let clutch out , shifter will not move when you try to put it in gear?? Has all new clutch linkage, clutch, everything is new. took to tranny shop they cannot figure out why this happens.
Any ideas out there? thanks, Les, ( I have been driving BB Chevelles since 1967) 
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#2
05-26-2013, 05:53 PM
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Welcome, so do you have to shut the engine down to get it back into gear?
__________________
Ray 1970 SS Chevelle Van Nuys Built
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#3
05-27-2013, 07:12 AM
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Quote:
thanks for your reply, Les,
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#4
05-27-2013, 08:02 AM
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Almost sounds like clutch plate is still spinning, pressure plate not releasing but that should make a grinding sound when you try to put in gear.
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#5
05-27-2013, 08:29 AM
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If your pilot bearing is toast or the cheap type one installed, it can lead to tough shifting because it won't allow the input shaft to spin freely and may also cause an uneven clutch release. It may also lead to premature front input bearing failure, You also need to make sure that the pilot bearing is non magnetic. A magnet should not stick to it. For some reason the magnetic ones cause problems in these older cars.
What gear oil are you using in the trans? It should run GL4 oil...That's a big debate, not going to get into it. But GM specifies GL4. Supposedly, the GL5 is not brass or soft metal compatible and may eat the softer metals. Synthetic gear oils are usually too good and eliminate too much friction on the syncros, which may lead to tougher shifting. Bell housing alignment is important. If it's off, your pilot bearing or front main bearing could become toast. It can also cause uneven release of the clutch and vibration. It may also lead to premature front input bearing failure. How much free play is in your clutch pedal? It's not a set in stone figure, but 1-1.5" of free play in the clutch pedal is usually a good starting point My guess is it's the pilot bearing and the shaft is not running true on the trans.
__________________
Ray 1970 SS Chevelle Van Nuys Built
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#6
05-27-2013, 01:52 PM
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Welcome to the site, Les!
Ray has a handle on what could be the problems. Are you using a standard bell housing or a scatter shield? You have to make sure the run out on the scattershield is dead on or it can cause what you're saying.
__________________
Alan 1964 Chevelle SS Speed's expensive, how fast do you want to go?
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#7
05-27-2013, 07:15 PM
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Ray,
thanks for all the info. I have a new needle brg pilot in the crank, I had red line MT90 in the trans and drained it today and will put in GM gl4, have GM bellhousing #3899621 on the car, not sure about that, calls for 3884626 but don't know if it makes a difference. Shifter works perfect except for the stop light, put in neutral situation. I can live with it but it is just one of those things that drive you nuts. Car had a body off, nut a bolt resto 22 yrs ago and I have put around 20K on it since then. Took it to Pure Stock drag races in Michigan and it ran a best of 13.3 @ 108mph with NO traction until the end of 2nd gear. Shod with F70-14 Goodyear Polyglas,
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