4.7 stroker question/flywheel and clutch question - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 10-30-2019, 08:50 AM   #1 (permalink)
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4.7 stroker question/flywheel and clutch question

Ok, guys, I hope someone can point me to the right direction. I am starting with a 4.0 engine from a 2001 XJ. I want to stroke it so I'm planning on using the 4.2 crank and rods. I will be mating it to a AX15 I have sitting in the shop from a 1989 XJ. I know there are different flywheels (internal vs. externally balanced) so which one should I use? Same for the clutch and pressure plate...Do I use the ones for the 2001 engine or for the 1989 AX15? I know I have to use the earlier pilot bearing because the shaft size is smaller. Just not sure with the rest of it. Thanks for any help.
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Old 10-30-2019, 09:55 AM   #2 (permalink)
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You want the FW from the 2001. It has the notches for the crank sensor whereas the 4.2 does not. Clutch would be the 4.0 external slave also. 94ish up.

You might want to check further. The 4.2 crank yes but the shorter 4.2 rods no.

Head over to jeepstrokers.org and post up. You will find plenty of good info on building your stroker right.

The Guru is Russ Pottenger. He has the parts and knowledge you want.
https://www.facebook.com/Bishop-Bueh...8948051907539/

His contact info is all over strokers if your not a FB fan.
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Old 10-30-2019, 09:57 AM   #3 (permalink)
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Old 10-30-2019, 10:10 AM   #4 (permalink)
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Thanks, I really appreciate it. I'll check him out. Just to clarify on the clutch though you're saying I should use the 94 up clutch even though my AX15 is 89 with internal slave? Thanks again, I'll head over to jeepstrokers and FB to check him out.
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Old 10-30-2019, 10:18 AM   #5 (permalink)
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My bad, thought the bellhousing/clutch was same vintage as the engine. Reread and your using the 89 Internal slave. seriously consider upgrading to external.
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Old 11-01-2019, 07:51 AM   #6 (permalink)
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Thanks,
I've looked at that. I may go ahead and do it. I was going to keep the internal setup because the OEM mopar units seem to have a good track record and the cheap ones crap out really quick. Since no one seems to carry the mopar unit anymore I think I'll just save face and change to external slave.
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Old 11-01-2019, 09:35 AM   #7 (permalink)
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You got a point. I carry a spare in the truck along with fluid. Knock on wood so far.
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