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Topic: M20 transmission popping out of 4th gear

in Forum: C3 Driveline Components


M20 transmission popping out of 4th gear

Posted: 5/3/06 6:58pm Message 11 of 25
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
I will check my linkage as it seems to be too far forward when in R, 1 & 3rd. Actually rests against the console front... is it particularl hard to adjust. I guess there have been posts on this before... Mine I believe is a M21... much difference than M-20 as far as adjusting?2 cruzn38840.7931018519


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M20 transmission popping out of 4th gear

Posted: 5/3/06 7:10pm Message 12 of 25
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Ray, if your shifter is going too far forward in R-1-3, then the whole thing is out of whack, as far as the neutral position. Those three gears use one each of the 3 linkage arms! If it was only in one of the positions, then the adjustment of that one linkage would probably fix it. It sounds like your shifter is not aligned properly in neutral, and all of the forward shifter positions are off. Bummer!
Does the shifter not go to the rear as far as it does forward?
If you need help with the adjustment, and you do not have a service manual(shame on YOU!!), send me a P/M or e-mail, and I'll send you a page out of the manual for the adjustment procedure. It's not really all that difficult, but you will need the car up off the ground a ways(safely!) to get to the linkages, and the shifter.



Joel Adams
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M20 transmission popping out of 4th gear

Posted: 5/3/06 11:08pm Message 13 of 25
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Australia
Joined: 5/6/2004
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Vette(s): 71 Coupe Black on Black
Or just buy a Hurst shifter and bolt it to the box and get rid of the sloppy original.


M20 transmission popping out of 4th gear

Posted: 5/4/06 4:43am Message 14 of 25
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Duncanville, TX - USA
Joined: 11/8/2003
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Hey, stranger!!! Long time no see!!


Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

M20 transmission popping out of 4th gear

Posted: 5/4/06 7:23am Message 15 of 25
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.

[QUOTE=Adams' Apple]
Does the shifter not go to the rear as far as it does forward?
If you need help with the adjustment, and you do not have a service manual(shame on YOU!!), [/QUOTE]

It may travel the same distance, but it touches the console in R,1. I do have  a shop manual and the Haynes manual too (wouldn't be without them or this group).. just getting my trailing arms back in and will work on the shifter next ...

2 cruzn38841.3211226852


Lifetime Member #86

USN 1966-1970

WestPac 67-68 Tet I&II


Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"



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M20 transmission popping out of 4th gear

Posted: 5/5/06 6:18am Message 16 of 25
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Gloucester, VA - USA
Joined: 1/29/2005
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Vette(s): 1979 T-Top, Metallic Green ZZ4 350/355 hp 405 ft/lbs torque Dual Spal Fans 700R4 4 Spd O/D Transmission 2004 Z06 Commemorative Edition

Ray,

 I guess your leg must be doing better ??




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M20 transmission popping out of 4th gear

Posted: 5/5/06 3:40pm Message 17 of 25
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Australia
Joined: 5/6/2004
Posts: 535
Vette(s): 71 Coupe Black on Black

[QUOTE=Adams' Apple]Hey, stranger!!! Long time no see!![/QUOTE]

 

G'day Mate.  I've been busy with the wife's MGB (engine rebuild) and haven't even touched the vette for ages.  Got all my guages replaced with reliable electronics and couldn't get the engine to idle right so did my compression test and found oil and water coming out of #3.  Pulled the head on that side and found a 2" crack in the bore.

That's where I'm at at the moment, waiting to pull the engine and get it repaired.

Been pretty busy at work too.

Chips5838842.6534953704


M20 transmission popping out of 4th gear

Posted: 5/5/06 7:03pm Message 18 of 25
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Poquoson, VA - USA
Joined: 11/20/2004
Posts: 1023
Vette(s): 73 Conv, Blue-Green/White Top - 454, M21 - Dark Saddle Leather, Power Windows, A/C, Tilt/Tele, AM/FM St. (orig. and sounds like it too).#2 -- 2007 Coupe,3 LT package, Z51 option, Victory Red, Ebony Int. Clear Top.
[QUOTE=JimG]

Ray,

 I guess your leg must be doing better ??

[/QUOTE]

Possibly off crutchers in 2 weeks, but will still have the boot for a while i guess. Fortunately the work on the vette (trailing arms etc) i can do from the floor, sitting/laying down. Once I'm able to drive I want to have it ready to go. I have everything ready to go back in , but i forgot to order new bolts... you *&%# believe that. Oh well they will be here Monday..  Hope your back is better these days?




Lifetime Member #86

USN 1966-1970

WestPac 67-68 Tet I&II


Featured in Corvette Enthusiast Aug 2007 "Shark Attack"
Blue Green *** 454,4 Spd, Dark Saddle Leather, A/C, AM-FM St. (orig), PW, Tilt -Tele Wheel"



(click to see a bigger image)


M20 transmission popping out of 4th gear

Posted: 5/6/06 4:06am Message 19 of 25
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Fayetteville, NC - USA
Joined: 2/13/2005
Posts: 244
Vette(s): 1968 Corvette Convertable, 4 spd, 350 SB, Daily Driver

My transmission was hard to shift and kicked out of 3d on deceleration.  I had it rebuilt by a professional shop, $200 plus $500 in new parts.  Now it works great, even the old whine is gone and it sounds much better.  Mine needed two gear cogs, two shifter forks, a counter shaft and a small parts rebuild kit, stuff like bearings, bushings and gaskets.  He also repaired mine with some newer style srynchros that shift smooth and wear lomger.  Good luck finding a good tranny shop.

JR 




M20 transmission popping out of 4th gear

Posted: 5/15/06 6:45pm Message 20 of 25
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ROCK HILL, SC - USA
Joined: 8/23/2002
Posts: 17
Vette(s): 1978 Light Beige, 2000 Light Pewter Metallic convertible

Just to add one more bit of information -- I put a pilot bearing (not bushing) in and apparently damaged it when installing the transmission. The damage consisted of pushing the bearing completely out of the race, so effectively there was no bearing or bushing. In that configuration, my tranny would quietly slilp out of 4th gear when decelerating. The only indication was a drop in engine noise as it went down to idle speed.

Not knowing what the problem was, I took the car to a local repairman who eventually found the problem. He noted that, with the tranny pulled but the clutch in place, just looking through the clutch the remnant of the bearing (the race) looked just llike a bushing. It was only when I told him it was a bearing that he figured out the problem.

Again, this only happened when in 4th gear and decelerating.




in Forum: C3 Driveline Components


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