Replace Moulding, Quarter Window--the trim at the front of your rearmost window (1 Viewer)

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mdcoa

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1.5 banana job, takes probably 2 hours for the first side, and less for the second, although you'll kind of need to do both at once before your adhesive hardens. Here's the symptom:
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Tools needed: 14 mm socket for removing rear seatbelts, phillips head screwdriver, torx (T25?) for removing trim around third-row seatbelts), deep socket 10mm (for nuts inside C Pillar).

1) order part numbers 75642-60021 and 75641-60021. And a tube of 3m window weld. And a caulk gun if you don't have one.

2) use a sharp screwdriver or the like to chisel/pry your old trim off while the windows are still mounted--sooo much easier than with the window off, which I did on the first side I attempted, not realizing the trim is held held on with a very, very serious adhesive.

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3) while doing this be aware there are two metal clips that wrap around the front of the windows on each side that you don't want to pry out with the trim, but if you do you can bend them back with pliers or vise grips
4) Remove lower and upper interior trim--see FSM. Involves removing interior trim above tailgate ( can pry it down with fingers), lower tailgate hinged trim thingmo (Phillips head screws x 5), upper and lower bolts (14mm) on both 2nd and 3rd row seat belts, 3rd row grab handles (phillips head), and third-row seatbelt lower trim (T25, IIRC), then removing lower trim, followed by upper trim--down and then out to free it from the stuff at the top of the C pillar.
5) remove two bolts (10mm) by the window motor and two insanely cool nuts (10mm deep socket) at the front of the windows (inside the C pillar at top and middle), unplug window motor (and antenna lead on the passenger side) remove the window.

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6) razor blade off all the old adhesive and clean things up.

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6.5) do steps 1-6 with the other side, since window weld is freaking expensive (~$30 per tube) and you will need two tubes if you don't glue up both sides within a couple minutes.
7) test fit the new trim
8) Put on some latex or nitrile gloves so your hands don't look like mine after this job
9) Run a pretty thick (1/4" ish) bead of window weld down the leading edge of each window and a thinner one along the front outside edge. Spread that thin one out with something other than your fingers
10) press and hold trim in place until the outer edge no longer pulls away from the window--you can kind of move back and forth between both.
11) at some point before reinstalling windows, pull your window seals and check for rust under them (found some--curses!) and clean up all that dirt that's gotten stuck around the seals over the decades
11) assembly is the reverse of disassembly.
 
Finished product:
IMG_5778.jpg
 
PS, also forgot to mention—when you remove the upper seatbelt mounts, put a chip clip on your seatbelts to prevent the violent retraction/ seatbelt lockup thing that I pulled off a couple weeks ago....

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Thanks for this thread. The trims on both sides are cracked on my 100. I don’t think I’ll be able to prioritize this in the near future so...

What would be the consequences of leaving it alone indefinitely?

Here are mine. The crack seems a little bigger than the OP. I was thinking maybe fill it with black epoxy for plastic.

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Thanks for this thread. The trims on both sides are cracked on my 100. I don’t think I’ll be able to prioritize this in the near future so...

What would be the consequences of leaving it alone indefinitely?

Here are mine. The crack seems a little bigger than the OP. I was thinking maybe fill it with black epoxy for plastic.

View attachment 2614634View attachment 2614635
No consequence at all—as far as I can tell having torn into it they’re purely cosmetic and completely separate from the opening and sealing mechanisms. I suppose the cracks could cause wind noise, or, if they were missing altogether, let the wind drive rain against the leading edge of the seal, but I cannot imagine just living with the crack causing any problems.
 
@mdcoa, thank you for the quick response. I figured it would be fine given how strong you said the adhesive is.

I guess this will go low on the priority list. But you did say you found rust under the seals. Would you happen to have photos or at least share how bad it was?

Also the photo of your new trim looks narrower than the original. Is that true or just an optical illusion?

Thanks for posting up all this good stuff. I don’t quite understand why that trim cracks but at least it’s not a major issue!
 
Yeah, it is pretty funny that it all seems to crack. Also funny that the little cracks drove me so crazy, when my belt moulding looks like dog poo and it only bothers me a little bit.

I did find some rust hiding under the seal on the right window, at the bottom, near the rear of the opening. I have no idea why it was rusty there--must have been a small paint defect under the seal that got moist and then got worse and worse as it formed its own channel for water to creep up and over.

I dremel sanded all the rust off, then hit it with some Eastwood rust converter / primer stuff (which was super weird--I had to hold the can very close to keep it from drying while on its way to the target--was getting bizarre and powdery buildup initially). Was very glad I happened to peek under the seal while I was in there, even though I wasn't planning on replacing it (I did replace it with new genuine once I found the leak/rust).

Probably an hour job per side, including trim removal, if you want to pull the windows and check under the seals, but probably a pretty unusual fault, so I wouldn't bother if there are no symptoms.

Also pretty sure I held the new bits up to the ones that were on the truck before getting started, and they were the same, so I think the apparent width difference must just be an illusion.

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Thanks again for documenting all this for those coming behind you! Good stuff for those of us short on time and/or don’t have the desire to blaze our own trails!
 
Thanks for this thread. The trims on both sides are cracked on my 100. I don’t think I’ll be able to prioritize this in the near future so...

What would be the consequences of leaving it alone indefinitely?

Here are mine. The crack seems a little bigger than the OP. I was thinking maybe fill it with black epoxy for plastic.

View attachment 2614634View attachment 2614635
Mine look just like this too. Funny enough, they are in the exact same spot on both sides and from a few feet away almost look like they are supposed to be there. Leaving them for now until I can figure out a way to do it without removing the windows.
 
Nice write up, I took the lazy many way out and pumped a little crazy glue in there and then a small bam of black permatex for added seasoning.
 
Mine are cracked, too. I thought it was a victim of Arkansas summer heat but maybe more of a qc thing.
 
Mine are cracked, too. I thought it was a victim of Arkansas summer heat but maybe more of a qc thing.
Thanks so much for the great write-up.
My 06 has had the same two cracks on both sides for several years now.
It seems like standard equipment, not an option.
 
Probably just age…they don’t have any obvious stress points and the cracks were in different, apparently random, places on both sides.
 
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