Pilot Bushing

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cwkerr007

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Does anyone have a link to a pilot BUSHING to replace the magnum needle BEARING I have the adapter steel spacer you need for bearing to fit.
 
Thats tge part number of the bushing that I have and it is to large outside diam I froze it and heated the adapter and it would have destroyed the bushing trying to press it in
 
Never heard or seen something like that- bushings are usually inserted directly into the crank flange counter bore (if your crank was drilled for one), bearing adapters get set into the flange convertor bore... Are you sure you don't have this
1732925009706.png

and are just missing the roller insert?
 
I may be wrong, but it sounds to me like he has the roller bearing adaptor Professor Fate shows but wants a bushing in there vs a roller bearing.

Which may or may not exist, because the OD of that roller bearing might not match a bushing that has the correct ID for what the OP need.

There may be a different adaptor available, but I don’t know what the OP is trying to put this NV3500 in.

***edit***

If this is an NV3500 into something this needs an adaptor that fits a Mopar/AMC crank register, this may be the necessary bushing

AMC EXETENDED PILOT.750 ID
 
Last edited:
Professor Fate said:
Never heard or seen something like that- bushings are usually inserted directly into the crank flange counter bore (if your crank was drilled for one), bearing adapters get set into the flange convertor bore... Are you sure you don't have this
View attachment 1716333531
and are just missing the roller insert?
Click to expand...
That is what I have in the crank now, it was an auto motor out of 2000 3500van , the insert in your pic fits fine but I was informed that the pioneer bushing could be inserted to replace the bearing. So that is what I'm looking for is the bushing that will fit where the bearing is.
 
cwkerr007 said:
That is what I have in the crank now, it was an auto motor out of 2000 3500van , the insert in your pic fits fine but I was informed that the pioneer bushing could be inserted to replace the bearing. So that is what I'm looking for is the bushing that will fit where the bearing is.
Click to expand...

Yeah just skip that and order the Advance Adapters bushing I linked
 
72bluNblu said:
I may be wrong, but it sounds to me like he has the roller bearing adaptor Professor Fate shows but wants a bushing in there vs a roller bearing.

Which may or may not exist, because the OD of that roller bearing might not match a bushing that has the correct ID for what the OP need.

There may be a different adaptor available, but I don’t know what the OP is trying to put this NV3500 in.

***edit***

If this is an NV3500 into something this needs an adaptor that fits a Mopar/AMC crank register, this may be the necessary bushing

AMC EXETENDED PILOT.750 ID
Click to expand...
You are absolutely right I am looking for the bushing to repksce the bearing cause the outside diam is diff than the bearing. Or if there is a large bushing that will take the place of the spacer and bearing altogether
 
cwkerr007 said:
Sorry just read your last message and seen link. So this will fit in the magnum crank where the linked bearing and spacer would mount
Click to expand...

That AA adapter bushing is the same OD and ID of that rolling bearing adapter, so, if that’s what you’ve got now the AA adapter bushing will replace it completely
 
cwkerr007 said:
That is what I have in the crank now, it was an auto motor out of 2000 3500van , the insert in your pic fits fine but I was informed that the pioneer bushing could be inserted to replace the bearing. So that is what I'm looking for is the bushing that will fit where the bearing is.
Click to expand...
No such animal AFAIK, I suspect you were misinformed.
There's nothing wrong with the roller bearing, so I'm not really sure why you would want to revert to a bushing. The bearing I pictured is what was used by the factory...
 
Professor Fate said:
No such animal AFAIK.
There's nothing wrong with the roller bearing, so I'm not really sure why you would want to revert to a bushing. The bearing I pictured is what was used by the factory...
Click to expand...
Yes sir it is what the factory used and this is just a perdonal preference for me I've always used bushings without a single failure and with out fear of tweeking that edge of that needle bearing. I'm sure the factory had there reasons for the change to bearings but it wasn't because of prior bushing failure , more thsn likely it was assembly line cost but I'm happy with bushings I'll be long gone by the time it wears iut lol
 
Professor Fate said:
No such animal AFAIK, I suspect you were misinformed.
There's nothing wrong with the roller bearing, so I'm not really sure why you would want to revert to a bushing. The bearing I pictured is what was used by the factory...
Click to expand...

Ah I bet there’s a bushing somewhere with those dimensions, but you’d have to search it by dimensions and not application. Because that roller has those dimensions for a reason so there’s probably a bushing that fits the same dimensions. But actually finding it would be a whole different story.

cwkerr007 said:
Yes sir it is what the factory used and this is just a perdonal preference for me I've always used bushings without a single failure and with out fear of tweeking that edge of that needle bearing. I'm sure the factory had there reasons for the change to bearings but it wasn't because of prior bushing failure , more thsn likely it was assembly line cost but I'm happy with bushings I'll be long gone by the time it wears iut lol
Click to expand...

I get it, I prefer bushings myself. If the roller goes bad it takes the input shaft with it. If the bushing goes bad you just change the bushing.

The factory uses rollers because of tolerances, it seems like a better idea from an engineering standpoint because it’s easier to maintain nice tight tolerances. But yeah when the roller fails your input shaft is junk almost immediately. If the bushing starts to go and you drive it a long time you may eventually take out the input bearing or internal transmission stuff, but that doesn’t happen overnight like the roller taking out the input.
 
cwkerr007 said:
That is what I have in the crank now, it was an auto motor out of 2000 3500van , the insert in your pic fits fine but I was informed that the pioneer bushing could be inserted to replace the bearing. So that is what I'm looking for is the bushing that will fit where the bearing is.
Click to expand...
Make sure the counter bore is deep enough for the input shaft or it will need trimming /too long for a automatic drilled crank.
 
Back in the day there was an undersized bushing for the drilled but not honed cranks. the standard bushing had an OD of .940 and the undersize bushing was .915 OD. There is somebody on ebay that sells the .915 bushings. I just bought a box of 5 on Rock Auto and will have my machinist machine them down.
 
Also back in the day I made a mistake. Dorman used to market a heavy, one piece bushing that fit the converter bore and was in fact a stick shift bushing, much like the "Jeep" needle bearing one. This was in the 70's and I always thought it was a huge mistake on Dorman's part as I did not understand what it was for. Dorman of course, did not bother to explain. I have no idea, of course, what the part no. was or whether you could find them nowadays.

Nowadays, of course, it would take a fortune in oilite to manufacture them, LOL
 
cwkerr007 said:
Yes sir it is what the factory used and this is just a perdonal preference for me I've always used bushings without a single failure and with out fear of tweeking that edge of that needle bearing. I'm sure the factory had there reasons for the change to bearings but it wasn't because of prior bushing failure , more thsn likely it was assembly line cost but I'm happy with bushings I'll be long gone by the time it wears iut lol
Click to expand...
Most likely input drag reduction at cold temps, makes it easier to put in gear & shift during initial cold operation, and as You & Del alluded to.....Oilite bronze machined & finished may actually cost more than a mfr'd needle brg.,....crazy....I'll have to hit McMaster-Carr's site & see where that's at these days.
 
Well
teringer said:
Make sure the counter bore is deep enough for the input shaft or it will need trimming /too long for a automatic drilled crank.
Click to expand...
I'm 98% pos that magnums have the same recess in the crank if I'm wrong someone step in so if my other magnums use the spacer and roller bearing then the input shaft on the trans should be right for the bushing since it is a magnum nv3500hd . But I will check that! Just so someone reading this is aware that the input shaft problem that teringer is referring to does apply for all the la motors cause they were produced in different dimensions so the fix in this thread only applies to magnum engines and maybe some la's but NOT all
 
cwkerr007 said:
Well

I'm 98% pos that magnums have the same recess in the crank if I'm wrong someone step in so if my other magnums use the spacer and roller bearing then the input shaft on the trans should be right for the bushing since it is a magnum nv3500hd . But I will check that! Just so someone reading this is aware that the input shaft problem that teringer is referring to does apply for all the la motors cause they were produced in different dimensions so the fix in this thread only applies to magnum engines and maybe some la's but NOT all
Click to expand...
Just a side comment on magnums.........the old White Whale 3/4T 5.9 had NO, as in ZERO, stick shift pilot cavity. The crank recess ENDED at the converter recess
 
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