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Old 05-28-2013, 01:27 AM   #1
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Frame Rust

So when I bought my Jeep last April my knowledge of Jeeps could fill a thimble. After havering my Jeep for a year my knowledge can now fill a shot glass.lol anyway I am in the process of hunting down a transmission/ drivetrain leak and I have removed the skid plate that covers the muffler and transmission parts. Upon removal and just getting up under her. I have noticed that the frame is a tad rusty. Everything seems solid, but I am wondering how much is too much. My plan is to power was the undercarriage and POR 15 or something to it. This Jeep has a lot of sentimental value now and I want to keep her for a while. Advice?

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Old 05-28-2013, 02:08 AM   #2
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Are you sure you weren't up and under my rig instead? I noticed the same things today changing my oil and tranny fluid. Everything looks solid but is definitely a bit rusted over.

In to see recommendations.

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Old 05-28-2013, 06:00 AM   #3
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Originally Posted by EnglishBulldog1 View Post
So when I bought my Jeep last April my knowledge of Jeeps could fill a thimble. After havering my Jeep for a year my knowledge can now fill a shot glass.lol anyway I am in the process of hunting down a transmission/ drivetrain leak and I have removed the skid plate that covers the muffler and transmission parts. Upon removal and just getting up under her. I have noticed that the frame is a tad rusty. Everything seems solid, but I am wondering how much is too much. My plan is to power was the undercarriage and POR 15 or something to it. This Jeep has a lot of sentimental value now and I want to keep her for a while. Advice?
Several very good recent threads on here on how to treat your rust issue. I will not reinvent the wheel, but if you search a bit you will find a step by step of what needs to be done to keep your Jeep frame in top shape.
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Old 05-28-2013, 06:32 AM   #4
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google search ultraeverdry
I'm currently prepping for coating the frame.....
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Old 05-29-2013, 01:05 AM   #5
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Was thinking of using Chassis saver from monstaliner. I am buying a kit to monstaliner the tub what the heck why not order more. Lol tried POR 15 and was not happy with results. I might be stressing to much but this Jeep has a lot of sentimental value now.
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Old 05-29-2013, 06:43 AM   #6
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Sad to say,because these frames corrode from the inside out.More rust isn't visible.Prevention is only as good as the preparation before paint.Check inside frame for build up.Very important that has to go also.
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Old 05-29-2013, 06:56 AM   #7
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Everything seems solid, but I am wondering how much is too much.
On Jeeps, there almost is no frame rot / rust that is to much. Yours sounds like it is just a bit rusty so a little sanding and painting will go a long way however as someone else said, these tend to rot from the inside out. Mine was rotted so bad that the transfer case actually fell out. Auto Rust Technicians (Safe T Cap frame repair kits) sells replacement frame pieces if yours ever gets to that point.
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Old 05-29-2013, 08:28 AM   #8
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Pics of the rust would probably help us ease your fears.......and probably save you some work!

I'm in New England and know my way around TJ frame repairs!
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Old 05-29-2013, 09:41 AM   #9
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I got all the visible rust off two years ago with sandpaper and a drill with a wire wheel and put two coats of self etching rustoleum primer and two coats of black hammered rustoleum over that. Its held up well, not chipping or scratching but the rust is starting to come through again. I just bought some duplicolor rust fix it yesterday and starting to repaint my frame. Seems to coat well, but I cannot say how it holds up, but heard it is a good product...we will see
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Old 05-30-2013, 05:16 PM   #10
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Here are some pics of the frame. The rust bolt hole is from the transmission skid plate which is off while I track down a leak. Is the jeep safe to drive (on Pavement at least) with the skidplate off? Thanks
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Old 05-30-2013, 05:31 PM   #11
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Here are some pics of the frame. The rust bolt hole is from the transmission skid plate which is off while I track down a leak. Is the jeep safe to drive (on Pavement at least) with the skidplate off? Thanks
No!!! The skid plate is the trans case support. You'd be lucky if you even could drive it.

This is what a bad rusty frame at the trans case skid can look like.



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Old 05-30-2013, 06:18 PM   #12
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You need to support the tranny bell housing even when parked. You can't drive like that or leave your rig parked.
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Old 05-31-2013, 02:12 AM   #13
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O crap! My Jeep has had the skid plate off since Monday. How much damage have I done leaving it sit like that? I just jacked up the transfer case to reduce the sag.
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Old 05-31-2013, 04:00 AM   #14
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O crap! My Jeep has had the skid plate off since Monday. How much damage have I done leaving it sit like that? I just jacked up the transfer case to reduce the sag.
You should be fine as long as you where not bouncing around in the jeep or driving it. Hopefully no bolts were bent from the transmission to transfer case I would check just in case also check the linkage on your t-case to the t-case shifter.

Hope this helps.
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Old 05-31-2013, 05:18 AM   #15
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When I find it inconvenient to support the trans/tcase with a jack I use a ratchet strap. Raise the trans slightly higher than stock, position strap under trans mount, attach to each frame rail, tighten strap, slowly lower trans until mount rests on strap. Obviously do not drive in this condition but you can move by hand and work under easier.
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Old 05-31-2013, 11:32 AM   #16
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Thanks! I have not been in the jeep yet I will just check for and bending. Now I will get the plate back on ASAP. so I take it the rust situation is no big deal? Just clean is up and cover up with rust neutralizing pain?
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Old 05-31-2013, 06:10 PM   #17
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Thanks! I have not been in the jeep yet I will just check for and bending. Now I will get the plate back on ASAP. so I take it the rust situation is no big deal? Just clean is up and cover up with rust neutralizing pain?
Are you going to use por 15 over the rust . I have had that on my tj for over a year now and no rust is penetrating thru and no chips or cracking..
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Old 06-01-2013, 12:42 AM   #18
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Will either use POR or something similar. Rust looks just like surface rust how.
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Old 06-01-2013, 05:27 AM   #19
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Just got 4 cans of eastwood inner frame coating, will pick up chassis saver when that's done. Pressure wash -> sanding w/ 120 (I have no rust) -> pressure wash and scrub -> acetone -> chassis saver
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Old 06-04-2013, 02:22 AM   #20
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I think it might be a seal. I wiped away then dripping fluid and will check before work. Will post a pic soon of the suspected cause. However since the skid plate is off I thought of painting it to match my Jeep (Yellow) any thoughts?
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Old 06-05-2013, 05:10 PM   #21
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It looks to be comming from above the part on the jack. The puddle keeps getting biger. I think I might have a bigger problem!
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Old 06-05-2013, 10:53 PM   #22
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Anybody? I want to get her running again!
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Old 06-06-2013, 08:23 AM   #23
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Just got 4 cans of eastwood inner frame coating, will pick up chassis saver when that's done. Pressure wash -> sanding w/ 120 (I have no rust) -> pressure wash and scrub -> acetone -> chassis saver
Will be interested in knowing how this stuff works... The inner frame coating that is.. Of course it's pretty darned hard to look up in there unless you have a borescope.

OP, check the fluid level of your rig while it is sitting level. If it was over-filled, that may be the reason for the leak. Most leaks are from the rear seal at the driveshaft yoke. You have to remove the driveshaft, then pry out the old seal, clean up the mating surfaces and carefully drive the new seal into place using either a seal driver or piece of tubing to just mate to the perimeter of the seal. I have used PVC fittings from Menards / Home Depot many times for this.

Make sure you carefully clean up the yoke of the driveshaft. I use a fine crocus cloth or 1000 grit sandpaper to polish the yoke surface that contacts the seal.
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Old 06-06-2013, 08:25 AM   #24
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One more thing.. Make sure you put a little grease on that yoke before reinstalling and a little grease on the sealing surfaces of the seal. If you don't lubricate that seal, it will burn up in a couple of miles and you'll be right back where you started..

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