Grinding going into reverse???

[waterboy1976]

Had my M20 rebuilt last year while doing the job on the baby. Now that it is done, we are breaking her in and when I shift into reverse, it grinds pretty harsh just going in....Once its in, its fine. 1,2,3,4 gear are all fine........any suggestions????

 

[GTR1999]

Engage 2nd gear first, then go to reverse.

 

[magoo]

Sounds like the clutch is not properly adjusted. 1,2,3,4, won't grind because they are synchronized. Your clutch is not disengaging even when the pedal is all the way in. Are you familiar with how to adjust it?

Mike

 

[srs244]

while i agree that the clutch could be adjusted improperly, it could also be that you are trying to engage reverse quickly after depressing the clutch. all the gears in the transmission are spinning with the trans in neutral and the reverse gear doesn't have a syncro ring. try depressing the clutch and waiting a few seconds before trying to engage reverse gear. if there is still grinding, chances are the clutch is out of adjustment. if it engages rather smoothly, there isn't anything wrong with the adjustment and you can use the 'second gear first" trick to stop the gears from spinning. my 69 350/350 always used to kind of clunk into reverse unless i waited a couple of seconds after depressing the clutch to move the shift lever to reverse and that was with a properly adjusted clutch.

just another suggestion before you start messing with the adjustment.

steve

 

[waterboy1976]

I will check the adjustment....The only adjustment I know of is the rod underneath the master cylinder. I know it is adjusted pretty far out right now, but Ill check it for more play. Any other adjusting areas?? Ill also try the 2nd to reverse mode as well as waiting a couple of secs. It used to kinda "clunk" before, now it grinds......Thanks guys....

 

[lucky76]

Had my M20 rebuilt last year while doing the job on the baby. Now that it is done, we are breaking her in and when I shift into reverse, it grinds pretty harsh just going in....Once its in, its fine. 1,2,3,4 gear are all fine........any suggestions????

I've had this kind of problem before and it was the clutch. Is it slow to enter 1st from neutral with the engine running. If it is then the main drive never completly stops when the clutch is depressed.

 

[waterboy1976]

ok, I looked everything over last night and it seems I dont have too much adjustment left on the Z bar.........what now???......tried 2nd gear to reverse.....it still grinds.....also depressed cllutch pedal waiting like 20 secs and then put into reverse...still grinds......what about that Z bar if Im almost at the end?????

 

[TWINRAY]

Are you at idle speed or a fast idle?

 

[magoo]

Remember, you can't just keep lengthening the rod. You are going to need "free play" at the top. Is there any adjustment on the rod from the z bar to the clutch arm? Has the clutch been replaced recently? It may have recieved the wrong pressure plate or throw out bearing? Or there could be a problem with the pressure plate. I have even seen the welds crack where the arms are welded to the tube on the z bar. Then the arm will flex instead of pushing the rods when you push the pedal in? Good Luck.

Mike

 

[steves1980]

I read where you need to go from first to reverse, i didnt know that on my M-22 and always got the grinding, after i read that, i when from first to reverse, after waiting a few sec. for RPMs to drop,. never grinded if i did it that way. hope it helps.

 

[waterboy1976]

Idle speed for me is around 1100 rpms...no choke on my car........

Clutch has been replaced...as the whole car has just gone through a 2 year hiatus replacing everything....clutch is a Ram Powergrip.....flywheel machined and balanced and everything looked good......

 

[SR'71]

I can't remember idle speed cold , think arround 700-800RPM . Warm is 650RPM

 

[waterboy1976]

UPDATE........Grinding is gone...between adjusting the clutch and waiting a second in between going to reverse shes quiet as a mouse.....


Thanks for all your help now if we can get the vibration in the driveline figured we'd be good.....cya

 

[Billybeau1]

I can't remember idle speed cold , think arround 700-800RPM . Warm is 650RPM

1973 350 Manual Trans 900 rpm
454 Manual Trans 600 rpm

 

[like2drive]

How'd you "adjust the clutch" if it was at the end of the rod? I have the same problem but no room on the rod to adjust...the end nut is only on about 2 threads! I have seen more threads welded on but this is too much of a "Bubba solution" to me. jim

 

[waterboy1976]

I actually had about 3/4 inche left to goo...and thats all it took for mine to quit grinding....I also wait a second or two once I depress the clutch to let everything quit spinning before going into reverse...

 

[zgator]

Go into first or second first and I think your problem will go away