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Old 10-13-2018, 07:39 PM
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Brand new 2018 JK . There’s a lot of small spots around on the frame of course the driveshaft , control arms are covered with surface rust . Bought a couple new TJ is and they were like this as well, maybe worse. But I don’t want it on the frame!

I was going to do the fluid film all over but I’m wondering if I should try to sand all the rust spots, apply a zinc coating off and paint it black maybe or maybe some rust oleum converter and then fluid film after it dries .

I didn’t do much for the TJs and after 12 years, the main reason I got rid of it it was the rust had spread all over pretty bad especially the paint . I want to take care of this one a lot better, cost a hell of a lot more !

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Old 10-13-2018, 07:46 PM   #2
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I went a little over board on mine. The day after I brought it home from the dealer I crawled under with a can of Rustoleum semi gloss black and a can of clear. Now three years later no rust except the drive shaft. I do hit the fasteners with fluid film to keep rust off the threads. Every now and gain I touch up from trail rash. Not only does it prevent rust but makes clean up after off roading much easier.

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Old 10-13-2018, 09:02 PM
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I went a little over board on mine. The day after I brought it home from the dealer I crawled under with a can of Rustoleum semi gloss black and a can of clear. Now three years later no rust except the drive shaft. I do hit the fasteners with fluid film to keep rust off the threads. Every now and gain I touch up from trail rash. Not only does it prevent rust but makes clean up after off roading much
easier.

I’m a little paranoid with the JLs recalled due to frame rust. This is a 2018 as well and they were made simultaneously. I don’t remember my TJs having rust on the frame. Is this just the norm?
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Old 10-14-2018, 08:43 PM   #4
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Iím a little paranoid with the JLs recalled due to frame rust. This is a 2018 as well and they were made simultaneously. I donít remember my TJs having rust on the frame. Is this just the norm?
Is the JL frame recall due to rust or improper welding?

My 2018 JKU was similar to the pictures you posted at the beginning of this thread. This seems to be the norm for Chrylser, but I find this situation disgusting.

I hand wire brushed the drive shafts and all the various rust spots on the frame, and then applied Krylon rust converter primer, followed by black paint.

As I live in an area where we have harsh winters and salt on the road, I covered the underside of my JKU with 4 gallons of rust proofing oil.

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Old 10-14-2018, 09:03 PM   #5
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Granted I wheel it, but go about 2 minutes into this video to see what a 4 month old JKU looks like underneath. I am just used to it I guess with having had three JKís. Donít keep them long enough for it to matter or itís not really an issue:

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Old 10-14-2018, 09:12 PM   #6
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I’m a little paranoid with the JLs recalled due to frame rust. This is a 2018 as well and they were made simultaneously. I don’t remember my TJs having rust on the frame. Is this just the norm?
The JL frame recall is due to improper welding. Apparently, the welding robot at the frame supplier was set up with the wrong specs.
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Old 10-15-2018, 07:17 AM   #7
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I've often wondered why drive shafts aren't coated right from factory, not just on jeeps but all vehicles.
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Old 10-15-2018, 07:35 AM   #8
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I've often wondered why drive shafts aren't coated right from factory, not just on jeeps but all vehicles.
I read in one thread that drive shafts are not coated as it would throw off the balance. Not sure that a coat of Rustoleum paint would have that much of an affect but I'm not a mechanic or engineer.
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Old 10-15-2018, 02:26 PM   #9
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My coworker has a 15 2 door Willys and was complaining about all the rust under it. Only 22k miles on it. I've looked at my 14 JKU and it has almost no rust whatsoever. We brought them both in to work to compare one day and his looks significantly worse. I have no idea if this makes any difference but I ordered mine and he bought his off the lot.
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Old 10-15-2018, 02:38 PM   #10
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Old 10-15-2018, 07:21 PM   #11
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I read in one thread that drive shafts are not coated as it would throw off the balance. Not sure that a coat of Rustoleum paint would have that much of an affect but I'm not a mechanic or engineer.
That is not true. I am an engineer. Rusted shaft will throw off the balance more that the paint.
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Old 10-15-2018, 07:27 PM   #12
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My coworker has a 15 2 door Willys and was complaining about all the rust under it. Only 22k miles on it. I've looked at my 14 JKU and it has almost no rust whatsoever. We brought them both in to work to compare one day and his looks significantly worse. I have no idea if this makes any difference but I ordered mine and he bought his off the lot.
Jeeps under chassis stays on the warehouse staging area for a long time depending on supply and demand. These warehouse are not temperature controlled. Some will wait in the outside loaded on trucks for dispatch. The area varies, throughout the USA from rainy humid weather to salty gulf of Mexico, to the Toledo Michigan winter salt. and so, there are lots of variables. After assembly, it goes back to the staging area for shipment. Then it sits on the dealership lots waiting for buyers. Lots and lots of variables. Dealers do not clean them just like you clean yours, and so, where do we bench mark?
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Old 10-15-2018, 08:04 PM   #13
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couple of things. the JL frames and JK frames are totally different and from what was stated not made in the same place. If you call Dana Spicer they will tell you that the knuckles and the drive shaft oxidation is actually a planned process and it actually is a protective layer of oxidation that prevents deeper rust or corrosion. I picked my recon up right off the truck and it was literally fresh out of the oven and it had rust in the usual places as have all my jeeps.
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Old 10-15-2018, 08:07 PM   #14
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That is not true. I am an engineer. Rusted shaft will throw off the balance more that the paint.
I was going to call BS on this, because all those aftermarket driveshaftsvsure do look pretty!
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Old 10-15-2018, 09:48 PM   #15
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Fluid film and done, like thread says. This one’s beating a dead horse
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Old 10-15-2018, 10:02 PM   #16
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If you call Dana Spicer they will tell you that the knuckles and the drive shaft oxidation is actually a planned process and it actually is a protective layer of oxidation that prevents deeper rust or corrosion.
Dana Spicer claiming that the rust on the components they manufacture is a planned process... This is the same company that is painting differential housings using some kind of dirty rags.

Unfortunately, the truth is that they simply don't paint components to save a dollar.

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Old 10-15-2018, 10:17 PM
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[QUOTE=Coachrhino11;33984797]Fluid film and done, like thread says. This one’s beating a dead horse[Quote]



I’m looking into either Krown or NHUO. Both oil undercoats. FF just stinks so awful. My rust isn’t that bad all of my Jeeps had rust on the control arms before I even drove it off the lot . It’s still sucks .
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Old 10-16-2018, 05:34 AM   #18
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I was going to call BS on this, because all those aftermarket driveshaftsvsure do look pretty!
I try to explain the off balance due to paint, that's all.
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Old 10-16-2018, 05:50 PM   #19
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[quote=Jeff Allan;33984833][QUOTE=Coachrhino11;33984797]Fluid film and done, like thread says. This oneís beating a dead horse
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Iím looking into either Krown or NHUO. Both oil undercoats. FF just stinks so awful. My rust isnít that bad all of my Jeeps had rust on the control arms before I even drove it off the lot . Itís still sucks .
Might stink, but thereís enough knowledgeable people on this forum that use it regularly that Iím going with it on mine. Smell goes away from what they say and most importantly, it works.
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Old 10-16-2018, 06:07 PM   #20
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What's the big deal with undercarriage rust? Crawl under any vehicle and you can find surface rust. Look at the brake rotors on one that has been road tested and sitting for a week; what will you see? Question just how long (years) do you think it would take for rust to perforate steel plate the thickness of the frame and control arms? Driveshaft? I get it, it doesn't look great but it is under the Jeep (Car & Truck).

FYI... Vehicles will take on the personality of their owner.. look for $_it and it will show you $_it; you've heard of people that had problems and it was still one of the best vehicles they ever owned and vice versa
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Old 10-16-2018, 07:17 PM
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What's the big deal with undercarriage rust? Crawl under any vehicle and you can find surface rust. Look at the brake rotors on one that has been road tested and sitting for a week; what will you see? Question just how long (years) do you think it would take for rust to perforate steel plate the thickness of the frame and control arms? Driveshaft? I get it, it doesn't look great but it is under the Jeep (Car & Truck).

FYI... Vehicles will take on the personality of their owner.. look for $_it and it will show you $_it; you've heard of people that had problems and it was still one of the best vehicles they ever owned and vice versa
I had to let my pride and joy TJ go due to rust. The frame wasn't that bad at all I used rust encapsulator and painted the inside of the frame, but every panel, seam, hinge, bumper. It was infected and no body shop wanted to work on it without charging thousands. Only 7 years old, and the driver's side fender had bubbled up with rust bad, that was in '13. Cost me $1450 to replace it. Soon after that, more spots kept showing up. Horrible. It had 33K miles on it!

It was garage kept, but I never did much to prevent rust. My fault, and I don't want to make that mistake again.
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Old 10-16-2018, 07:32 PM   #22
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What's the big deal with undercarriage rust?
It is a big deal when you live in an area where winter last several months, with the roads contently covered with melted snow and salt during this period.

The TJ, once plentiful on the roads, is now a rare sight. Yet, the last ones were built only 12 years ago. The YJ, are almost extinct.

These Jeeps were not taken off the road because they did not pass inspection; there is no mandatory inspection in the province where I live (and it is a large province, containing almost 25% of the population of Canada), these Jeeps were sent to the scrap yard because rust made them unserviceable.

Rust never sleep.

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Old 10-16-2018, 07:41 PM   #23
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I had to let my pride and joy TJ go due to rust. <snip>
Horrible. It had 33K miles on it!

It was garage kept, but I never did much to prevent rust. My fault, and I don't want to make that mistake again.
Was it kept in a heated garage? It seems that a heated garage promote rusting on a vehicle that is driven during the winter. The warm brine is more "active", and the inside of the garage is probably humid once the snow has melted off the vehicle.

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Old 10-16-2018, 09:44 PM   #24
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I had to let my pride and joy TJ go due to rust. The frame wasn't that bad at all I used rust encapsulator and painted the inside of the frame, but every panel, seam, hinge, bumper. It was infected and no body shop wanted to work on it without charging thousands. Only 7 years old, and the driver's side fender had bubbled up with rust bad, that was in '13. Cost me $1450 to replace it. Soon after that, more spots kept showing up. Horrible. It had 33K miles on it!

It was garage kept, but I never did much to prevent rust. My fault, and I don't want to make that mistake again.
Damn! That sucks. You are better than me, Iíd probably be done with Jeep after that.
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Old 10-16-2018, 09:59 PM
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[QUOTE=SkyMaster;33986099]
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I had to let my pride and joy TJ go due to rust. <snip>
Horrible. It had 33K miles on it!

It was garage kept, but I never did much to prevent rust. My fault, and I don't want to make that mistake again.
Was it kept in a heated garage? It seems that a heated garage promote rusting on a vehicle that is driven during the winter. The warm brine is more "active", and the inside of the garage is probably humid once the snow has melted off the vehicle.

<img src="https://www.wranglerforum.com/images/smilies/smile.gif" border="0" alt="" title="Smile" class="inlineimg" />

Nope. All the TJs were/ are rusting badly around here. I wanted to run that thing for another 10 years.. but rust, It’s what they do. We have winter 4 sometimes 5 months of the year. It sucks. I can store the jeep and wait for summer but the whole fun for me is driving the jeep in the snow.
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Old 10-17-2018, 07:00 AM   #26
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Reason I’ll be using fluid film
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Old 10-17-2018, 10:06 AM
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Reason Iíll be using fluid film

One good thing, in favor of JKs, I talked to someone who had both for a long time. and isn't biased. He said a ton of the latest TJs like '06 he'd look at were rusting badly, but the early JKs, were much better. I know it's a year younger but...maybe the process is better. TJ's rust badly.

But I don't want to take chances! On the Fluid Film thing, all the pro places insist that the rear lights and doors be done, tail lights removed and sprayed inside with the foam. I didn't see anything in the big FF thread saying to do all this.
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Old 10-17-2018, 11:30 AM   #28
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I’m not going that far, I’m not taking anything apart. I’m pretty much focusing on frame, driveshaft, etc... Major stuff
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Old 10-17-2018, 11:38 AM   #29
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One could try lowering their JK to a 2" ground clearance. This way, you can't easily see the rust.
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Old 10-17-2018, 11:47 AM   #30
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I know I’ve read rust eats frames from inside out. How the hell do I go about protecting inside frame? Only a few holes

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