Broken transmission crossmember bolts - how I fixed it. | Ford Explorer Forums

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Broken transmission crossmember bolts - how I fixed it.

JakePSD

Well-Known Member
Joined
March 25, 2010
Messages
385
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City, State
Ohio
Year, Model & Trim Level
2003 Mercury Mountaineer
Figured I would contribute something to the forum that has given me ton of useful information. If there is a better section of the forum to put this, mods feel free to move it or even change the title if you think it'll get better views. As I'm sure all the experienced members here know, and some of you may find out if you ever decide to remove your transmission yourself, the bolts on the crossmember really like to break off. I learned this myself the other day. Here is how I fixed it.

1. Take a grinder and smooth off what's left of the bolt (if there is enough sticking out to do so).

2. Drill a smallish hole in the center. Doesn't have to go all the way through.

3. Take an air hammer with the pointy chisel and stick the end in the hole you drilled, the hole keeps it from bouncing everywhere and dinging up your frame while accomplishing nothing.

4. Hammer away. This may take a while depending on how good your air hammer is. Mine apparently sucks because it took a solid hour of hammering between all 4 bottom bolts. Your results may vary. I stopped periodically and beat them with a 3 lb hammer a few times, not sure if it helped any but it sure made me feel better releasing the anger that was building.

5. Eventually they will pop loose. Use your fingers and a magnet to fish the pieces out of the round hole on the outside of the frame.

6. Buy some M12 bolts, washers, and nuts. For the top (inside the frame rail) I used some 7/16" fender washers that just fit in the hole on the frame since my local hardware store didn't have any metrics the right size.

7. I had some 1/16" plate steel in the shop and cut some pieces to act like a factory type self holding nut. You can use whatever you like but this is what I had laying around, at least it'll give you some idea to go off of. I made them 3cm wide and 5cm long. Sorry for the metric but since everything on these mostly is metric anyway I just used my metric tape measure.

8. Drill a hole almost to the edge of one side. Slide it over the bolt, put on the large washer, and weld them up. You should have something that looks similar to this.

IMG_20160209_191914_055.jpg


IMG_20160209_194346_207.jpg

Forgive my awful fabrication skills. It gets the job done haha.

9. Fish them through the holes you took the old pieces out of and drop them though the frame.

10. Drink a beer.

11. Continue with transmission installation.
 



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I think you should redesign your plan. You've underestimated the power of #10 .

Repeated attempts of #10 will improve your success, and will often encourage friends to show up, and assist in the process. (Making this a win-win situation).

After everything is together, and checks out, I just put a couple of tack welds on the outside edge of the crossmember. (On the edge, so that I could grind them off later, should further repairs become necessary.)
 






I thought about making every 2nd step to drink a beer but then my welds would look even worse haha. Why the welds on the crossmemeber? I thought about tacking the bolts to the frame to keep from wiggling but figured I'd leave them loose so I can make some adjustments if needed.
 






I usually get the four bolts off, on the sides of the frame rail. I usually break 3-4 of the ones mounted on the bottom. That usually leaves me with only 4-5 bolts that actually hold the crossmember in place. I tack the edge of the crossmember afterwards, so they can be easily accessible IF I ever need to redo something later.
 






Do you recall how long your bolts were?
 






I don't recall but I just measured for ya. 4.5 cm from the bottom of the head to the tip of the shaft. That sounds really weird hahaha. They are a bit longer than needed, but it helps getting things lined up. You can go a bit shorter if you want, or even cut/grind them down after they are installed. A little shorter may help getting them down into the frame also.
 






I don't recall but I just measured for ya. 4.5 cm from the bottom of the head to the tip of the shaft. That sounds really weird hahaha. They are a bit longer than needed, but it helps getting things lined up. You can go a bit shorter if you want, or even cut/grind them down after they are installed. A little shorter may help getting them down into the frame also.

Thanks, Jake!
 












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