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Topic: What's Required to Remove 4 Sp Manual Transmission

in Forum: C3 Driveline Components


What's Required to Remove 4 Sp Manual Transmission

Posted: 11/26/09 8:05pm Message 11 of 20
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Oklahoma City, OK - USA
Joined: 4/1/2007
Posts: 432
Vette(s): 1972 LS5 Convertible,Auto.Targa Blue with Black Interior.
Did you solve the ticking problem? Just curious.


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What's Required to Remove 4 Sp Manual Transmission

Posted: 11/26/09 8:14pm Message 12 of 20
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Bloomfield Hills, MI - USA
Joined: 6/29/2008
Posts: 199
Vette(s): 1975 Corvette coupe, 4 speed manual, 383 ci 9.5:1,Edelbrock dual plane Air Gap intake, Alum Heads,Comp Cam, roller Rockers, PS,PB,Tilt
I'm not sure if I solved the 'ticking' problem. It is intermittent. I am suspecting that it is the parking brake cable vibrating on the exhaust. It's one of those things on the 'to do list' still.


What's Required to Remove 4 Sp Manual Transmission

Posted: 11/27/09 6:11am Message 13 of 20
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20218
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
I don't know how I missed this one! Embarrassed
Glad ya got it handled, tho.
One thing I would check, as far as the "ticking" noise....check to see that your distributor cap is fully seated on the distributor. Lot of times, when the trans is removed, the engine may hang down far enough for the dist. cap to bump/rub up against the firewall or wiper motor, knocking it a little off center. When you fire it up, the rotor will hit in the wrong places, and "tick" every revolution. Just a thought.



Joel Adams
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What's Required to Remove 4 Sp Manual Transmission

Posted: 11/29/09 8:55am Message 14 of 20
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Greensburg, IN - USA
Joined: 9/24/2003
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Vette(s): Previous: 1984 Coupe, 1988 Maroon Coupe, 1989 Coupe, 2001 Roadster Present: 1967 Stingray Roadster, 1976 Stingray Coupe, 1989 Roadster..
Brudder Joel I wudda never thought of that. I mightta strained for it on a Auto Tranny but wudda overlooked it on a speeder.

Ah guess dats why ya makes da BIG $$$! You Da Man...


What's Required to Remove 4 Sp Manual Transmission

Posted: 11/29/09 3:15pm Message 15 of 20
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Oak Creek, WI - USA
Joined: 5/21/2008
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Vette(s): 1981 Great White Shark. Red Interior, 350/190 hp. PS, PB (SS), A/C CC, T-Tops. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vettes Car Club. 175,000 Original miles!! Now own a 1998 C-5!
Joel, do you work in the automotive business??


What's Required to Remove 4 Sp Manual Transmission

Posted: 11/29/09 9:51pm Message 16 of 20
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20218
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
[QUOTE=dskopp]Joel, do you work in the automotive business??[/QUOTE]

Whatever gave you that idea?Confused
Actually, I'm a book-keeper in a whore-house....(can I say that here?)

Naw...really...I've been in da arotomobile repair business for....EVER....Dead I been doing trans-a-missions for aboot 30 years now, and tinker with the rest of it...



Joel Adams
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What's Required to Remove 4 Sp Manual Transmission

Posted: 1/6/10 2:42pm Message 17 of 20
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I just put together a basket  job 1978 4 speed  road tested it and it seems the trans is noisy in all gears except 4th. Is this normal or?


What's Required to Remove 4 Sp Manual Transmission

Posted: 1/6/10 9:12pm Message 18 of 20
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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
No! A 4 speed that makes noise in all gears BUT 4th has a bad bearing, or a damaged countershaft and/or input shaft.
It really depends on what kind of noise we're talking about.
Grind-growl-howl-squeal-squeek-,etc.

The one exception to this would be the Muncie M-22...nicknamed the Rockcrusher for the noise it makes...


Welcome to C3VR!!!
Adams' Apple2010-01-06 21:15:50


Joel Adams
C3VR Lifetime Member #56    

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(click for Texas-sized view!)
             NCRS

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

What's Required to Remove 4 Sp Manual Transmission

Posted: 1/6/10 9:38pm Message 19 of 20
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It's a howling noise, and is completely gone when I shift into 4th.
Thanks for your input,



What's Required to Remove 4 Sp Manual Transmission

Posted: 1/7/10 6:09am Message 20 of 20
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20218
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
Well...that's not good!
That will be one of two things...neither of which is fun. You may have a bad rear bearing on the mainshaft, or....more likely, the needle/roller bearings(all 100 or so of them) inside the cluster gear are bad, which would also make the cluster shaft bad.
To explain, the cluster gear is hollow, and has a shaft that runs thru it, called the cluster shaft. To keep the shaft and gear from rubbing, and wearing, there are a series of needle bearings around the shaft, that roll against the cluster gear. These bearings are basically free-floating, and have to be inserted individually into the cluster gear, and then the gear installed into the trans case, then the cluster shaft is inserted thru the case and the cluster gear.
When these bearings, or the shaft itself wears(over time, or due to rust), it allows the main gears and the cluster gear to separate and not run where they should, which increases the clearance between the gears. This is what makes the noise. The rear bearing on the mainshaft, if worn, will cause the same noise, since that also allows too much clearance between the gear sets.
The reason the noise goes away in 4th gear is due to 4th gear being "direct drive", meaning it is a straight shot from engine to differential, with no gear reduction. This keeps any pressure off of the cluster, so there's no noise when in 4th.
If you have a noise like this in all gears, it could be the input(front) bearing, since it has pressure in all gears.
Sorry to say, but your noise isn't going to go away...the trans need repairs... You might be able to drive it like this for a long time, and not have any problems, BUT....the damage will get worse, and more parts will be damaged...

One other thought...if the gear surface of either the input shaft, or the cluster gear is damaged(teeth broken, severe rust, etc.), it could cause a noise in all gears but 4th, also. Gear damage like that, however, usually is more of a grinding, clunky noise. The trans is still in need of repair, either way, imo.
Adams' Apple2010-01-07 06:16:22


Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

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

in Forum: C3 Driveline Components


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