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post #1 of 8 Old 07-04-2020, 07:51 AM Thread Starter
Wilsonasantos
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Pilot Bushing Install

I’ve got a 75 CJ5, AMC 304, T15 trans.

Installing a new pilot bushing. I pounded it in carefully with a wooden dowel and it is about 1/4” proud of the hole. Not flush. It doesn’t want to budge anymore, the dowel is cracking. Does it need to be fully flush? Any recommendations?

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post #2 of 8 Old 07-04-2020, 08:07 AM
222Doc
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did it seat? was it the right part. meaning it matched what you pulled out?< might be the most important. If the whole was clean should go in rather easy. if the old one did not stick out sounds like the wrong part if its seated.

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post #3 of 8 Old 07-04-2020, 09:14 AM Thread Starter
Wilsonasantos
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Thanks for the quick response. I can’t post pics to this response from my phone.

It’s definitely seated. As for the old part, about 1/3 of it has a flat taper. The first 2/3 is a thicker OD and the last 1/3 is a slightly smaller OD. I thought this was from wear and the bushing just wore down. Maybe that was a bad assumption. They both have the same ID and length.

The bushing I bought from crown said this would fit my motor and trans. It has a consistent OD throughout.

Maybe I need to call Novak and talk to someone.
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post #4 of 8 Old 07-04-2020, 09:37 AM
222Doc
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well if it sticks out more then the other did. It may work i cant say, it may not. dont sound right. I have done enough of these not on a 304 amc. My older jeeps i had one was a buick 235 and the other 47 flat head 4 pop and a BB chevy . You could test its fit but that means installing the clutch and being sure nothing interferes. You do not want that bushing pushing on the input shaft it would kill the in put bearing trans could even shove the crank forward and FUBAR its thrust bearing. or both.

OD. and ID and length are the same? yes the pilot hole can wear making it look larger. you can mic the snout on the input shaft to be sure. But if the old one say sat flush and its length is the same as the one you installed but that one sticks out more? something dont add up. Maybe im not seeing this understanding it well enough, well im at a pc so yea.

I know the many have done over my life the bushing have always looked exactly the same,less wear. If that trans is real old they can wear on the snout too.

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post #5 of 8 Old 07-06-2020, 05:48 AM Thread Starter
Wilsonasantos
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Ok, in front of my computer now so I attached some pictures for reference.

Also, I noticed that inside the crank where the PB is installed, there is a tiny "lip" where the new PB gets caught on and where the old PB seems to fit nicely with. I can feel the tiny ridge in the crank with my fingernail.
Attached Thumbnails
OldvNew1.jpg   OLD.jpg   NEW.jpg   OldvNew2.jpg  
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post #6 of 8 Old 07-06-2020, 07:06 AM
LumpyGrits
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Did you check fitment on the transmission input shaft?
Did you soak it overnight in oil?
HINT-Never buy anydangthing from Crown. Crown=China junk.

Have'n you along, is like loose'n 2 good men
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post #7 of 8 Old 07-06-2020, 07:17 AM Thread Starter
Wilsonasantos
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Quote:
Originally Posted by LumpyGrits View Post
Did you check fitment on the transmission input shaft?
Did you soak it overnight in oil?
HINT-Never buy anydangthing from Crown. Crown=China junk.
Yes, it fits well around the input shaft - no play and spins well.

I'll be soaking the new part from Novak in oil and freezing it overnight.
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post #8 of 8 Old 07-06-2020, 12:09 PM
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So the new pilot bushing sits out the length of the recess in the original pilot bushing, which is also a smaller diameter that is machined into the crank end about 2/3rds of the bushing length into the crank?

I would have the new bushing machined down to fit like the old one as this off set could cause the new bushing to "wobble" in the crank shaft end. Or find a bushing like your old one.

1972 CJ5 304 V8, 3 speed manual trans
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