New pilot roller bearing install?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
I always put the open side out for the flange of the nut that tightens upon it pushing the balancer on. I don't know if it really matters that's just how I always do it.
Thread Starter
Burning Brakes
Joined: May 2007
Posts: 1,150
Likes: 14
From: LaMoille Illinois
You understand that i was reffering to the rear of the crank that the jack shaft slides into from the trans right ? NO nuts to tighten just the shaft holds it in when trans and motor are mated.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
No I guess I was assuming you were calling the bearing install tool the pilot and were referring to installing the balancer.
Sorry, disregard my post then.
Melting Slicks
Joined: Sep 2004
Posts: 2,412
Likes: 3
I really don't know for sure, but I remember one side of the bearing was tapered around the hole. I think I faced that side out, towards the trans. I compared it to the pilot bearing that was in my old motor and just copied what I saw. Even though my old bearing was not a roller and my new one was, I remember one side being tapered on each.
If no one else knows, I can go in my garage and take a picture of the bearing in my old motor.
Just let me know.
If no one else knows, I can go in my garage and take a picture of the bearing in my old motor.
Just let me know.
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Thread Starter
Burning Brakes
Joined: May 2007
Posts: 1,150
Likes: 14
From: LaMoille Illinois
That's the way I installed it on the 427 CI in my 68 for the T56 Viper tranny.
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Eddie
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
I can attest. Had a roller bearing fail in a Muncie in a Camaro. Couldn't figure out why my fairly new clutch was seemingly shifting weird and making a roaring sound. Took it all apart and needle bearings were falling on me.
I've no idea why it failed but it did. Brass bushings for me going forward.
I've no idea why it failed but it did. Brass bushings for me going forward.
Melting Slicks
Joined: Nov 2001
Posts: 2,659
Likes: 7
From: Katy (Houston) TX
CI 7-8 Veteran
The explaination I've heard, from Lars actually, was that the tolerances on older transmissions like the Muncie aren't very tight and the pilot will see a lot more perpindicular forces. A roller bearing has a higher failure rate in this scenario and when it fails....not good. A bronze bushing isn't really going to fail, so to speak. It might open up a little but the input shaft is still going to spin freely.
Now in a newer transmission like a Tremec the input shaft tollerances are a lot tighter and the end of the shaft isn't going to move around as much. That's why they can get away with a roller bearing. In fact, I've heard that running a bushing in one of these newer trannies can cause the reverse....the input shaft bearing can prematurely wear or fail because of the lack of tight tollerances compared to the roller pilot bearing.
Hope that makes sense. I don't speak from experience though, it's just what I've been told by those that know a lot more than me. I've since always run a pilot bushing in my muncies.
Now in a newer transmission like a Tremec the input shaft tollerances are a lot tighter and the end of the shaft isn't going to move around as much. That's why they can get away with a roller bearing. In fact, I've heard that running a bushing in one of these newer trannies can cause the reverse....the input shaft bearing can prematurely wear or fail because of the lack of tight tollerances compared to the roller pilot bearing.
Hope that makes sense. I don't speak from experience though, it's just what I've been told by those that know a lot more than me. I've since always run a pilot bushing in my muncies.
Pro
Joined: Apr 2001
Posts: 605
Likes: 0
From: las vegas
If you insist on converting to a roller bearing you must index your flywheel housing and get the runout to less than four thousands. I also read that the older transmission input shafts were not real hard and you will see excess wear on the input shaft from the use of a roller bearing. Vegas
