Replacing Pilot BUSHING with Pilot BEARING?

'64 F100, 2wd, 292, 3 spd.

The truck originally has a pilot bushing, but I have a brand new pilot bearing that, according to AdvanceAuto's computer, and my measurements, will replace the old one without a hitch. Is this okay to do, to switch from a bushing to a bearing?

 

where does it go?

 

its normal. Is the old one bad?

 

The pilot bushing or bearing sits in the center of the flywheel. The tip of the input shaft of the transmission sits in the bushing. It's just used to support the clutch ***embly and transmission input shaft.

 

It's pretty common but the Br*** generally last many times longer then a bearing. Once the bearing goes out you have a real problem. The bushing wears slowly and never causes a Major problem. Personally I stay with Br***.
The Wizzard

 

If the bushing was in good shape I'd leave it. If it looked questionable, I'd replace it with the bearing. But switching between the 2 poses no specific risk.

 

How much longer does a bushing last compared to a bearing? Does either have any advantage over the other?

 

funny how different regions call stuff different names ..anyway "always heard called a guide bushing or carrier bushing.. Bearing should work fine, just make sure you pack it well (unless its a teflon).

 

Pack it? These are sealed bearings. Stay with the bushing except for high load applications (like HD trucks) where a bearing is the only option.

 

Another disadvantage of the needle bearings is that when poking the ****** back into the clutch, the input shaft can dent the end of the shell of the bearing, which if bad enough will prevent the needles from rolling. You'll never know until it roaches the end of the input shaft enough to lock the shaft to the bearing. Can't happen with bronze.

 

Be careful putting to much grease on the pilot bearing/bushing; you could end up with a hydraulic condition when installing the transmission. In other words, if you put to much grease in the bearing/bushing installing the transmission will push the bearing/bushing out of the end of the crankshaft; which is the way we remove them.

 

How can I tell if the original bushing is no longer any good? What kind of tolerances are exceptable? I think I'll stick with the bushing if its still good. I'll just lube it up some. The thing is currently bone-dry.

Should I use high-temp grease?

 

many types of bearings friend, have seen sealed, thrust type and omni-directional for carrier bushing replacements

 

Bronze bushing is best. They are durable where bearings may wear out or fail.

 

I thought the old bronze bushings were acutally berillium?(spelling?)

 

Could be berryllium. My spelling may be wrong also.

 

Just got done replacing the bearing in my truck with a bushing. Bearing went bad and almost ook out the input shaft on a muncie. Put a bushing back in. I've never heard of a bushing failing.

When I dropped out the trans the rollers just fell out of the shell. I've had 4 different ******s in this truck and always lubed the bearing when it was out.I will never use one of the bearings again.


jerry

 

How can I tell if the original bushing is worn out or not? It's still in the flywheel, and I dewon't replace it now if I don't have to.

 

I agree with Jerry. If a bearing goes bad it can take out your input shaft. A bushing is every bit as good as a bearing and won't damage the shaft.

Terry

 

A pilot bearing did take out my Muncie. The 283 and 4 speed in my 55 Chevy had been together since 1970, when my older brother first put them in his 57 Chevy (with a pilot bushing). I never had any problems until I put a bearing in, (in 1998). In less than a year it completely screwed up 3rd & 4th gears.

 

Bushings should last a long long time, since the crank and input shaft turn together when clutch is engaged, meaning most of the driving time.

A good practice is to soak the sintered bronze (or berylium) bushings in a cup of engine oil for at least 24 hrs. The oil will be soaked up by the bushing.

 

Sorry, but what do you mean by 'sintered'? Should I take the old one out and soak it? Just tonight I was under there fixing some other stuff and I put some grease on the inner wall of the bushing. Figured it will lube it nicely. I don't know whether it needs to be replaced or not, however I don't think it does...

 

A bushing is more forgiving and less likely to have a catastrophic failure if there is trouble.

 

Sintered bronze is a porous bronze which has enough porosity to absorb oil. This is what most repair manuals say to do when replacing the bushings. I myself would just get a oil squirt gun and shoot enough oil into the center (and behind) the bushing so that it will absorb some oil. Grease will probably just leak out and may even dry up faster than just putting oil. I never greased them.

 

Br*** and bronze will have traces of beryllium as impurities, but are definitely not composed of beryllium, which is toxic to human beings.

 

If you have a spare input shaft use the pilot portion and see how much play there is. Should be able to slide in easily but not be able to move very much side to side.


jerry