Pilot bearing question

[Ryjedavis]

Hi all. Quick question. I have a 2000 TJ 4.0 with the NV 3550 transmission. I just bought a reman engine. When I look at my old crankshaft, it looks like the pilot bearing is in a sleeve installed in the outer, larger diameter recess. I bought a pilot bearing off rockauto, and it’s just the bearing with no sleeve, and it looks like it fits in the new crankshaft in the inner, smaller diameter recess. The FSM doesn’t mention anything about a sleeve for my year. Is it ok to install as is into the inner, smaller recess or should I find a bearing with the larger sleeve? I included photos of the new crankshaft and the old one with the pilot bearing/sleeve installed. Thanks!!!

 

[macleanflood]

I know with my stroker crankshaft on my 97 with an AX-15 it was National FC69907.

What part and number are you trying?

-Mac

 

[Ryjedavis]

I got National SCE1295. It’s the bearing only. After doing some more research I “think” I need the one with the sleeve. Rockauto has the one you used, but it’s called “Manual trans; includes bearing sleeve repair kit”. I don’t know why the FSM doesn’t mention a sleeve, unless it’s just assumed the sleeve and bearing are one unit.

 

[GATORB8]

There are two pilot bearing in the 2000 parts manual. Unsleeved for the 2.5 and sleeved for the 4.0. The P/N @macleanflood references is the national equivalent of the 4.0 part number:

2.5:

National 65446:

4.0:

National 69907:

 

[Ryjedavis]

Thanks! I didn’t have the parts catalog - I was trying to figure it out from the FSM which wasn’t clear. Thanks again super helpful!!

 

[GATORB8]

Thanks! I didn’t have the parts catalog - I was trying to figure it out from the FSM which wasn’t clear. Thanks again super helpful!!

You can download it here: https://wranglertjforum.com/threads...ice-manuals-fsm-technical-documentation.4618/

 

[Rickyd]

Hi all. Quick question. I have a 2000 TJ 4.0 with the NV 3550 transmission. I just bought a reman engine. When I look at my old crankshaft, it looks like the pilot bearing is in a sleeve installed in the outer, larger diameter recess. I bought a pilot bearing off rockauto, and it’s just the bearing with no sleeve, and it looks like it fits in the new crankshaft in the inner, smaller diameter recess. The FSM doesn’t mention anything about a sleeve for my year. Is it ok to install as is into the inner, smaller recess or should I find a bearing with the larger sleeve? I included photos of the new crankshaft and the old one with the pilot bearing/sleeve installed. Thanks!!!

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The question you need to be asking yourself is how do you put the pilot bearing at the same depth in relation to the flange on the crank that is found on the old motor. If you sink it into the little hole it won't hold the end of the input like it is designed to. Get the correct pilot/sleeve combo for your jeep and move on to the next problem.

The 258 crank used on strokers is totally irrelevant. It isn't from a 4.0l.