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Click on image for the lowdown. 
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| | | Forums66 Topics128,034 Posts1,055,540 Members48,425 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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| | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | i just received a pilot bearing for my 59-235 and need to give it to my builder to install for me. one end is flat and the other is beveled. my thought would be that the beveled end faces the tranny. but does it so i can pass on to the builder. | | | | | Joined: Mar 2006 Posts: 1,703 Shop Shark | | Shop Shark Joined: Mar 2006 Posts: 1,703 | yes, bevel towards trans. | | | | | Joined: Jan 2008 Posts: 4,961 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,961 | Pilot bearings have the taper to make stabbing the transmission easier. Its bad enough with the taper. Every time someone tells me they are having trouble stabbing a transmission, I tell them to look at the bearing before they proceed. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Taper on the outside.
Outside or inside, it took me 30 years to figure out how to easily slide a transmission into place: cut off the heads of two long bolts and place the studs/stems into the top two transmission mounting holes in the clutch housing. Then lift the transmission up to the bolts and slide the transmission home (rotating the main shaft as needed to mate the splines on the front shat into the clutch). This procedure makes this job a cake walk - taper on the outside or on the inside.
This technique makes the installation of even an SM420 an easy one-person (plus a cheap-jack) job.
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Many years ago when I worked on school busses, I had a winch rigged to go through the side door to lift the transmission and rotate it out of the way. Romoving the floor pan above it made it easy access.
Little harder when having to do the work under the truck, but the bolt idea works very well. | | |
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