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This is a replacement part upgrade for the high fail plastic part in earlier Dodge, Jeep, and any other vehicle that uses a similar window regulator setup. If something is going to fail you have a 99% chance it's going to be this part. This is also an upgrade as it was designed to be stronger than the original and last quite a bit longer. I've replaced all 4 of mine in both my '98 Durango and '01 Grand Cherokee 3 years ago and haven't had one problem with them. If you are just trying to replace one that broke, I recommend getting 4 (or maybe a few more just in case) to upgrade them all at once. They are also quiet. You don't hear vibration from playing music or anything like that because it's a tight fit.
You will also need a cotter pin for it and you will probably have to drill out the hole to a larger size to accommodate the pin. I may release another model later that doesn't require this, but this works for now and it's easy. I will get the size of the cotter pin needed, but you could take the part to a hardware store and get one that will work.
I will warranty these parts against defects for 1 year from the date of purchase. Buyer will not hold seller liable for any damages incurred by modifying the window regulator.
1) Remove the window regulator - Most parts stores have manuals that should suffice or there are plenty of youtube videos. Take pictures of the position of the regulators to prevent hooking them up backwards (the worst that will happen is the motor will be backwards and you won't be able to install it) 2) Remove the regulator from the track - This can be a little tricky if the regulator was all the way up or down because it may need to be moved up or down a little to remove it. If replacing on a window that isn't working, I recommend removing the cover where the spool is for the cables because it likes to bind up in there when there's no tension. 3) Inspect for damage - If a cable is broken, the plastic spool is damaged beyond repair, or something else is broken you may just want to get another regulator. Alternatively, you can get a good one at a local salvage yard and do the upgrade on it saving you money and increasing the life of the window regulator. 4) Remove old plastic piece - I do this using a vice and 2 sockets (there are inexpensive vices that work well). One larger than the plastic piece and one that will fit through the hole. The little one presses the plastic piece into the larger socket. It will break the plastic piece. 5) Slide the new upgraded part into position and lock it in with a cotter pin - The hole can be drilled a little to accomidate the cotter pin. The original cotter pins are slightly different from the ones you can get at home depot in a variety pack. Other hardware stores may have more. 6) Reinstall the cables - This can be tricky and would help to have a helper although not necessary. I normally leave the white clip near the half circle that attaches the cable the to track for the end. That seems to work best. Those springs can be frustrating to keep compressed. NOTE: There may be 2 locations the clip can go in which is why pictures are a good thing or you can always reference the opposite side (from what I've seen) if you didn't take those pictures. 7) Reinstall the window regulator assembly into the door - Connect it and test it out prior to fully installing the door.