88mancheman Posted March 28, 2019 Share Posted March 28, 2019 I feel like this is another dumb question, I’ve searched high far and wide and haven’t seem to come up with a definite bolt sizing for the flex plate to torque converter bolts, I’m replacing my flex plate over the next couple days(hopefully have all the parts todo such job) and plan on replacing the torque converter bolts for piece of mind while I’m down there but I cannot seem to find the correct size for them, are these just universal torque converter bolts I can grab at my local parts store? Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 28, 2019 Share Posted March 28, 2019 There will be absolutely no peace of mind offered to you for replacing those. Link to comment Share on other sites More sharing options...
Dzimm Posted March 28, 2019 Share Posted March 28, 2019 Yeah just reuse them. Loctite is your friend. Link to comment Share on other sites More sharing options...
88mancheman Posted March 28, 2019 Author Share Posted March 28, 2019 Awesome thank you guys for the quick reply’s I’ll just reuse them and put some blue lock tight on Link to comment Share on other sites More sharing options...
88mancheman Posted March 28, 2019 Author Share Posted March 28, 2019 Does anyone know the torque specs for the flywheel bolts? Link to comment Share on other sites More sharing options...
Eagle Posted March 28, 2019 Share Posted March 28, 2019 1 minute ago, 88mancheman said: Does anyone know the torque specs for the flywheel bolts? Flywheel (flex plate) to crankshaft, or torque converter to flex plate? Link to comment Share on other sites More sharing options...
88mancheman Posted March 28, 2019 Author Share Posted March 28, 2019 Flywheel (flex plate) to crankshaft, or torque converter to flex plate? I hate to be that guy but both would be kinda helpful I’m finding varying specs from site to site Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Eagle Posted March 28, 2019 Share Posted March 28, 2019 2 minutes ago, 88mancheman said: I hate to be that guy but both would be kinda helpful I’m finding varying specs from site to site Sent from my iPhone using Tapatalk So what engine, what transmission, and what year? Link to comment Share on other sites More sharing options...
88mancheman Posted March 28, 2019 Author Share Posted March 28, 2019 So what engine, what transmission, and what year? 1988 Comanche 4.0 6cyl with an AW4 (out of a 93 Cherokee if it matters) :) I really appreciate everyone’s help too it’s made this go effortlessly so far Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 I need to remove the spacer plate first but so far I don’t see any major cracking.... are those small crack lines normal for a old 4.0? Link to comment Share on other sites More sharing options...
gogmorgo Posted March 29, 2019 Share Posted March 29, 2019 What crack lines? Are those radial lines cracks? If they're actually cracks, whether "normal" or not, you don't want them there. When mine cracked it was in a jagged ring right around the edge of the washer, just outside the bolt circle. Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 They seem to be small radial cracks it’s honestly very hard to tell, I’m going to pull the flexplate right now and update you on how it looks once it’s out one odd question though, my buddy mentioned to me that the flexplate and torque converter only mount up one way is this true?! Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 @gogmorgo you where right the cracks where hiding under the odd spacer plate, off to the parts store to get a new flex plate Link to comment Share on other sites More sharing options...
Eagle Posted March 29, 2019 Share Posted March 29, 2019 Check previous discussions of this. Apparently what most of the parts stores sell as a Renix flex plate doesn't work. Compare the new one closely to your old one before you install it and button everything up. I think the issue is (going from memory) that the teeth on the perimeter that trigger the CPS are positioned and/or spaced incorrectly. Link to comment Share on other sites More sharing options...
88mancheman Posted March 29, 2019 Author Share Posted March 29, 2019 Unfortunately you where right Eagle the timing slots where about 40 degrees off so left it with them, where should I end up sourcing one from? Jegs can overnight me one tomorrow by crown but I’m not sure the crown flex plate will work aswell Link to comment Share on other sites More sharing options...
88mancheman Posted March 30, 2019 Author Share Posted March 30, 2019 Ok so after hours of frustrating phone calls to parts departments who wouldn’t help me I walked into my local dealership and turns out the flex plate for Renix era Jeeps is discontinued from the dealership, but they gave me this website to search on as they told me this website buys all of Chrysler’s old parts when they are discontinued so after alittle more searching I think I’ve found it https://www.vintagejeepparts.com/index.php?route=product/product&product_id=4176After alittle more searching I also found what I believe to be the same part from JEGS for about $15 cheaper https://www.jegs.com/i/Omix-ADA/440/16913.11/10002/-1Hopefully this can help other people who are having the same problem as me Link to comment Share on other sites More sharing options...
DirtyComanche Posted March 30, 2019 Share Posted March 30, 2019 There isn't any consistency on the aftermarket flex plates, if you took that one back and exchanged it for another there would be a good chance it would be okay. Also, I don't trust Omix parts. They use OEM P/Ns to imply the are OEM parts. They are not. Often they will throw the cheapest Chicom junk in their box and send it out. BE WARNED. Link to comment Share on other sites More sharing options...
Dando Posted March 30, 2019 Share Posted March 30, 2019 I’ve been in the same situation and sadly I’m currently in it again. The aftermarket ones from advance autozone etc are not made right. I used an oem from a member here last time but I’m falling short on that this time. If you order the omix please report if it’s made corrrectly. Thanks Link to comment Share on other sites More sharing options...
Eagle Posted March 30, 2019 Share Posted March 30, 2019 Considering the widespread problem with the aftermarket flex plates, I periodically wonder if the cracked originals could be saved by TIG welding. In the case of one such as in the photos in this thread, the center section is badly cracked but hasn't fallen out yet. Could a good welder run a bead long the length of the crack (perhaps on both sides), then grind it down flush with the surface? Or: weld the reinforcing ring to the flex plate. Maybe even have a new reinforcing ring made up, slightly wider so it overlaps the cracked area, and then weld that to the flex plate? Link to comment Share on other sites More sharing options...
Jeep Driver Posted March 30, 2019 Share Posted March 30, 2019 4 minutes ago, Eagle said: Considering the widespread problem with the aftermarket flex plates, I periodically wonder if the cracked originals could be saved by TIG welding. In the case of one such as in the photos in this thread, the center section is badly cracked but hasn't fallen out yet. Could a good welder run a bead long the length of the crack (perhaps on both sides), then grind it down flush with the surface? Or: weld the reinforcing ring to the flex plate. Maybe even have a new reinforcing ring made up, slightly wider so it overlaps the cracked area, and then weld that to the flex plate? Yes and I was going to suggest that............just didn't want to confuse matters. In fact, that is exactly what I would have done if need be. Also have the machine shop check balance and balance if necessary. Link to comment Share on other sites More sharing options...
gogmorgo Posted March 30, 2019 Share Posted March 30, 2019 I'd be concerned about welding and reusing a flex plate. The reason they crack is due to metal fatigue, so even if you did do an excellent job welding it up, I don't know how long it would last. It could easily just crack again in short order right next to the weld. For me there was only one way it would go on, IIRC the spacing of the bolts prevented it from lining up incorrectly, as in they're not a perfect circle. I did however make note of how it was positioned in the vehicle when I pulled it. On the HO the timing windows look like they'd line up three ways and be correct, but I had couldn't get it lined up the first way I tried. I'm not positive how the timing windows are on a Renix, though, but the crank bolts will be the same pattern. The flexplate to torque converter bolts don't matter. They line up however they're rotated. Clocking between the crank and trans input isn't critical to function. Link to comment Share on other sites More sharing options...
Eagle Posted March 30, 2019 Share Posted March 30, 2019 Correct, it can only go on one way. I am aware of the potential for future cracking with a welded solution but, if we can't find new replacements that have the CPS teeth in the right location, ya gotta do something. My view is that it's an old vehicle, I'm not going to be hammering the throttle pedal, so any solution that gets it back on the road is better than leaving it up on blocks with no transmission in it. If I were going it, I think I would go for redundancy -- I'd have the flex plate crack(s) welded up and ground smooth, and then I'd have an oversized ring made up and weld that to the flex plate. I would prefer to use a new flex plate, and the only one I've repaired (a 1988 XJ) was done long enough ago that I was able to buy a new replacement from my local Jeep dealer. In retrospect I now wish that I had saved the old flex plate, but I can't turn the clock back by 15 years and retrieve it out of the trash. Lesson learned -- the auto makers don't produce parts for discontinued models forever, and the aftermarket is a crap shoot insofar as quality and functionality ar concerned. Link to comment Share on other sites More sharing options...
88mancheman Posted April 4, 2019 Author Share Posted April 4, 2019 Sorry for the late reply all but I didn’t quite want to report back till I was 100% sure on my findings, so here they are I ordered the omix ADA flex plate for 87-90 Cherokee from jegs speed parts, P/N 440-16913.11 on jegs website here is the link to it: https://www.jegs.com/i/Omix-ADA/440/16913.11/10002/-1 Annnndd.... They are a match!! It’s seems that omix ADA still makes a flex plate for our Renix CPS!! I can’t tell y’all how relieved I am to be able to find a flex plate that match!! Now for the fun stuff.... to install and make sure everything works correctly, I used some hex wrench’s to hold the flex plate in place when taking pictures and all the cps marks line up, 20 squares in between the large rectangle for the cps on all 3 sides just like the stock one :) even after lightly bolting it up to check for clearance and positioning it fits right into the exact spot my old one came out of and all 6 bolt holes line up! Here are some more photos of the omix ADA flex plate next to my “stock” one Forgot to mention above when I called the dealership they told me that not only the flex plate but MOST dealer Renix parts have been discontinued...BUT there is a company out of Texas that buys all of Jeeps discontinued and overstock parts and resells them on there website here : https://www.vintagejeepparts.com After a bit of searching I found the flex plate: P/N 33002675 (note use that P/N with discretion as that part number on other sites will reference the wrong flex plate) Here’s the link: http:// https://www.vintagejeepparts.com/products/33002675_Flexplate%2C-87%252d90-Jeep-Cherokee-%28XJ%29.html I know i I kinda solved my own problem in a way but Hopefully this can help someone else who has the same problem as me and doesn’t have to go through the fiasco I did to get a new one, BTW thank all off your for the advice, I will say I was leaning toward having a matching shop weld it up If I couldn’t find a new one I’ve heard of it done before successfully in odd ball cases but I figured it was just best to hunt down a new in hopes of solving this issue for others aswell :) Link to comment Share on other sites More sharing options...
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