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4spd Tranny installation
#936478 Wed Apr 17 2013 05:08 PM
Joined: Jul 2012
Posts: 163
B
Shop Shark
I had to replace the clutch, and I have the new clutch and pressure plate installed on the flywheel and attached to the engine. I tried my best to line the clutch in the center, but I am still unable to get it to mate to the transmission. Anyone have any tips?


1950 Chevy 3600
Re: 4spd Tranny installation
Bradw1876 #936508 Wed Apr 17 2013 07:19 PM
Joined: Dec 2001
Posts: 1,249
W
Shop Shark
You almost have to use a clutch alignment tool, when you install the clutch, either that or an input shaft from a junk transmission of the same (3 or 4 speed).
Best to make 2 "bolts" with the heads cut off and screw into the clutch housing, to help support the tranmission while installing. You may need to turn the out put shaft back or forward a bit to allow the splines on the tranmission input shaft to align with the splines in the center of the clutch disc.

John

Re: 4spd Tranny installation
Whitelightning #936514 Wed Apr 17 2013 07:31 PM
Joined: Jul 2012
Posts: 163
B
Shop Shark
can i get a clutch aligmnent tool locally? autozone etc..


1950 Chevy 3600
Re: 4spd Tranny installation
Bradw1876 #936520 Wed Apr 17 2013 07:41 PM
Joined: Mar 2002
Posts: 9,111
'Bolter
I have a cheap one and it works great. It has a plastic cone that centers the disc.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
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Re: 4spd Tranny installation
Bradw1876 #936522 Wed Apr 17 2013 07:43 PM
Joined: Feb 2002
Posts: 12,860
F
Extreme Gabster
I thought all clutch kits came with the plastic alignment tool included now headscratch

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
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Re: 4spd Tranny installation
Bradw1876 #936526 Wed Apr 17 2013 07:55 PM
Joined: Dec 2001
Posts: 1,249
W
Shop Shark
I don't know if they would have a clutch alignment tool you can buy or rent that would fit or not. Seems like Chevy used the same basic clutch for a long time.....
John

Re: 4spd Tranny installation
Whitelightning #936553 Wed Apr 17 2013 09:43 PM
Joined: Apr 2008
Posts: 503
Y
Shop Shark
I had similar issues a few years back. The issues I had Dealt with were the centerline of all the parts, but also the tilt of the trans from front to back. Once that was resolved I had a slight issue getting the pilot bearing and the shaft on the trans to go together the rest of the way. I ended up putting an extremely light coat of high temp grease on the tip to get it to slide into the bearing.

Taking the two bolts and cutting the heads off to make guide pins for the trans are worth their weight in gold for me. Allows me to focus on alignment rather than lifting and alignment.

Good luck.

Last edited by Yelostn78; Wed Apr 17 2013 09:44 PM.
Re: 4spd Tranny installation
Yelostn78 #936556 Wed Apr 17 2013 09:49 PM
Joined: Jul 2012
Posts: 163
B
Shop Shark
yeah all of the 6 bolt clutch kits came with a clutch alignment tool, but mine is a nine bolt and i had to order it all in pieces from chevsofthe40s...


Can you explain the bolts with the heads cut off a little better... how long should the bolts be? the tranny is only able to get like 4 inches away from the mounting holes due to the splines not lining up.


1950 Chevy 3600
Re: 4spd Tranny installation
Bradw1876 #936560 Wed Apr 17 2013 09:59 PM
Joined: Apr 2008
Posts: 503
Y
Shop Shark
Assuming you can get things a little more lined up, I found bolts that had matching threads to the bell housing/trans mount. I made sure I could thread them in far enough by hand to support the trans. I then used a cut off wheel to cut the head off. I ground off the sharp edges and then threaded them into the bell housing. Then when I lift the trans, I hang it on the "studs" and slide it forward. If you cannot find an alignment tool, I have used a deep socket, as well as a Dowl rod before, just have to be careful. If I remember correctly, I put the throw out bearing in place and then had someone push the clutch while I lined up the components. Be careful! Best practice is to get the alignment tool, but I have made this work. I got the idea for the cut off bolts/studs from the 48-51 truck manual transmission install section.


You know you only truly love your old truck or tractor after the point at which you are ready to push it off a cliff, but you suck it up, get it running, and get it back into service...... The 3rd time

1949 Chevy 4400 Big Red
1949 Chevy 3600 Bob's Truck
1949 Chevy 3100 The Investment
1949 Chevy 3800 the Won Ton

Re: 4spd Tranny installation
Bradw1876 #936561 Wed Apr 17 2013 10:01 PM
Joined: Apr 2008
Posts: 503
Y
Shop Shark
One other thing, while you have the torque tube/drive shaft off, it is a good time to replace the torque tube seals and carrier bushing. Denny Graham has pics of the process. Parts are fairly inexpensive.


You know you only truly love your old truck or tractor after the point at which you are ready to push it off a cliff, but you suck it up, get it running, and get it back into service...... The 3rd time

1949 Chevy 4400 Big Red
1949 Chevy 3600 Bob's Truck
1949 Chevy 3100 The Investment
1949 Chevy 3800 the Won Ton

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