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tracking down an 1987 MJ 2.5l flywheel

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Old 05-24-2023 | 11:27 AM
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Unhappy tracking down an 1987 MJ 2.5l flywheel

Greetings, I'm fresh out of the water here in hopes of locating a flywheel for my truck (which is currently sitting gutted in the driveway). 87 MJ Renix. The Mopar part number is 33002408. I cannot find one anywhere so I'm checking here at the advice of a redditor to see if anyone has a source or one sitting around. I'm desperate.
Old 05-24-2023 | 01:22 PM
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Rock auto has a replacement ring gear for the flywheel. Possibly something a machine shop could do, or the old favorite junk yard diving....

Last edited by BruceB; 05-24-2023 at 01:28 PM.
Old 05-24-2023 | 05:20 PM
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Originally Posted by BruceB
Rock auto has a replacement ring gear for the flywheel. Possibly something a machine shop could do, or the old favorite junk yard diving....
Problem is finding a Renix MJ in this area, but do you think a machine shop could take an entirely different flywheel and cut it to work?
Old 05-24-2023 | 08:02 PM
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That's the right part number. Likely XJ and maybe even YJ as long as it's a 2.5.

What's wrong with the current one? Sometimes they can be surfaced like brake rotors.
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Old 05-25-2023 | 07:06 AM
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The flywheel triggers the CPS so it will have to come from an 86 to 90 Renix motor.

Again, why do you think it needs replacing?
Old 05-25-2023 | 07:51 AM
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Originally Posted by cruiser54
The flywheel triggers the CPS so it will have to come from an 86 to 90 Renix motor.

Again, why do you think it needs replacing?
I thought I read that the CPS is triggered by a missing tooth on the flywheel...is that correct?
Old 05-25-2023 | 08:00 AM
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Not a ring gear tooth or teeth.

4 triggers on a 4 cylinder and 6 triggers on a 6 cylinder. Part of the flywheel.
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Old 05-25-2023 | 09:03 AM
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Originally Posted by cruiser54
The flywheel triggers the CPS so it will have to come from an 86 to 90 Renix motor.

Again, why do you think it needs replacing?
I left that part out for a reason. I bought a clutch kit with a new flywheel and tossed the old one before realizing it was a mismatch. This was over a week ago and I am still hanging my head in shame. If I had a time machine I would use it to beat my own ***.
Old 05-25-2023 | 09:42 AM
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He was the victim of an eBay that claimed the clutch kit fit all years. The clutch itself is, but the flywheel was not. It doesn't help when even reputable sites like Quadratech claim the crown brand 4.0 flywheel is the same as the 2.5l flywheel. Even worse, he didn't realize the error until it was all buttoned up and wondering why it wouldn't start.

***
The electronics nerd in me is starting to wonder how hard it would be to make a board to convert the Crank signal to allow a later flywheel/flexplate. That would be a lot harder than the board I made to allow a newer AW4 to work with an older tcu. That one just used a simple circuitto drop it from 4 pulses per rev to 1 pulse. This would have to synch to the newer signal, and create a new one. On the plus side, you could make it more sensitive to work with weaker sensors and even adjust timing on the fly. Hmmm. If I only had time and an extra engine and flywheels to play with.
Old 05-25-2023 | 10:30 AM
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I can only suggest going to Car-part.com. Enter the details and it will list salvage yards that report having it in stock. If you put your zip code in, it will list them in distance order. Then contact the yard to verify they have it and fitment.

https://car-part.com/index.htm
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