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I also think the 42RLE is a good little trans. It was on TJ's back to 2003 before our JK's. I find them simple but effective and easy to work on.

And we're done! Happy to have this one behind me. Now to put everything back together.

Final prep complete and now bonded in. I'm going to let it sit 3-4 days under load since it's in the upper 50's here. Hoping to have paint on by the end of the week than the exhaust/new cats can go back in.

I'm no metal guy but I'm pretty happy with this. Still a little bit of metal work to do, and I need to sand down a few painted areas. But I feel good that I cut out all rust, and that was the primary objective. It feels very solid without the structural adhesive.

You can actually buy a replacement floorboard, so it has the same ribbing and drain holes as OE. But as it will come to me it's much bigger than the space I need, so I'll cut it down to a size that is basically whatever point I find clean metal after I grind off paint and rust. For attaching...

Got some cutting done today. Waiting until I can get some flap wheels tomorrow to clean up paint and rust. Grinding wheel too slow and air grinder I think I have the wrong grits. The panel bond seems very particular about clean metal so I'm just going to keep moving up and out until I have...

Exactly my thoughts. The rest of the entire interior floor is great, so is the bottom all around. Makes me think the drivers side T-top was off often with rain. Drives me crazy because the plugs are there for a reason, use them!!!!

Then it's your lucky day. Here's one data point. Truth be told, it's actually pretty solid quite a ways up there. But obviously with that surface rust forming and the rust inching that way up it was only a matter of time before it got there and ate it all up. The plan is to cut it out, get down...

That's the opinion I needed to hear, thanks guys. I pulled the heat shield off the passenger side and that manifold is fine. So at least for now, because I want to get this thing back together and not turn it into a total money dump (replacement cats were included with the sale of the vehicle)...

Last time I checked I don't think cracks were a design future of exhaust manifolds. 🤣 I have the cats removed for replacement and I thought I had an exhaust leak, so that's how I got here. Two questions then; 1) would any of you all try to weld repair this or do I just need to buy a new one...

If anyone needs it in the future here's what the 08 Rubicon has available for OBD2 monitoring. Additionally, the B1S1 O2 sensor every 6 seconds drops out on voltage to something like .005 V. I'm assuming that's my circuit slow response but will investigate if we buy the Jeep.

Both banks under efficiency thresholds and (likely) a sluggish O2 sensor. I'll do some reading on both courses once home.

Yep, that's the point of my test drive. Going to pull codes then watch fuel trims and all that good stuff. I agree cats are a more rare failure mode. It does have the sway bar and locker buttons on it so I suspect it is a Rubicon but I will verify front and back Dana 44s and that the buttons work.

Thanks!! I've only owned TJ's so thanks for the clarification. That's how the owner listed the ad, but the hood says Rubicon so let's go with that.

Hey all, I'm looking at a 2008 JKU Rubi Sport (edit: thanks to u/speartip for model clarification) tomorrow and there's speculation from the seller that the cats are bad. I'd like to monitor pre-cat O2 sensors to see if the engine itself is fine to get a feel for fuel burn independent of the...