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Unread 08-08-2010, 05:29 PM   #1
crzdmnky
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1977 CJ5 
 
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Installing SM420 into CJ5 - Pilot bearing Question

As the Title says I am installing my SM420 into my CJ5, I have a 258 I6. The guy I got the SM420 from had a 304, and he gave me several brass pilot bearings he had made for it. It has the Advance adapters bellhousing as well.

To begin off the SM420 shaft is shorter than most other shafts, and so it takes a special pilot bearing I suppose. Heres a pic of what mine looks like after installing the pilot bearing. This is not actually my picture, but one he sent me on how his was installed. Should give you an idea. Did anyone else do it this way?

I am actually having lots of trouble getting my transmission all the way installed. I am lacking a couple of inches, worked on it for over 3 hours yesterday and all I know is that I have the shaft in the clutch, but not the pilot bearing because the transmission is still able to be moved from side to side and up and down. Just frustrating and am extremely sore. Thanks for any advice.



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Unread 08-08-2010, 06:15 PM   #2
JeepnBlake
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Mine is similar to that. I have the SM420 with the AA bell and D20 adapter.

I ended up ordering a pilot bushing for a chevy truck. Once i got the bushing I actually put the chevy pilot into the brass one. My brass bushing also didn't go in quite as far to the crank.
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Unread 08-08-2010, 06:44 PM   #3
motiv8ya
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I have a new Novak SM420/465 to AMC engine front bearing conversion retainer/bushing/hardware kit that I'm not using if you're interested....
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Unread 08-08-2010, 07:07 PM   #4
crzdmnky
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Quote:
Originally Posted by motiv8ya View Post
I have a new Novak SM420/465 to AMC engine front bearing conversion retainer/bushing/hardware kit that I'm not using if you're interested....

I do not want to take this transmission back out and back apart for reasons that if this is a legendary transmission, and worked for this many years, I dont think there is any reason to change it. This transmission is probably one of the nicest, smoothest shifting, turning, and anything else transmission that i have ever dealt with. Including my own rebuilds that I have done in the past.
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Unread 08-08-2010, 07:17 PM   #5
crzdmnky
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Quote:
Originally Posted by JeepnBlake View Post
Mine is similar to that. I have the SM420 with the AA bell and D20 adapter.

I ended up ordering a pilot bushing for a chevy truck. Once i got the bushing I actually put the chevy pilot into the brass one. My brass bushing also didn't go in quite as far to the crank.
Thanks for the quick feedback, this is what I was looking for. Just wanted to know if it was the same setup as everyone else. So now with that answered, I guess its just holding my mouth right to get it stabbed. I am going to be so sore after tonight working on it. Wish me luck, and if anyone else has any other ideas or tips, please tell me.

IE. I have the AA adapter to a Dana 300 . Will have a 69 crawl ratio after all said and done. Better than the T-150 and Dana 20 and a total crawl ratio of 21!
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Unread 08-08-2010, 07:27 PM   #6
JeepnBlake
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My preferred trick for mounting transmissions to engines is use bolts that are and inch or 2 longer and then tighten them in a criss cross fashion. Think tightening a wheel. I do this until the transmission is close enough where I can use the normal length bolts. Just be careful not to put too much bind on anything and strip anything out.
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Unread 08-09-2010, 03:47 PM   #7
crzdmnky
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Thanks guys, I got it in, had to do what JeepnBlake suggested.
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