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Old 03-29-2012, 09:42 PM   #1
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Rear tow hook bolts! Help!

Ok so I searched and found tons of threads about the bolt size but never actually got an answer on the actual size. So my questions are is the bolt that is in the rear bumper (that needs used) the right size for both holes? And I also noticed there a special thing that holds the nut still on the tow hook to tighten it and it hangs out of the frame do I need it? Do I need to have a nut as well? Last (I think) if the bumper bolt isn't the right size then what is? Any help is appreciated!!! Thanks!!!

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Old 03-29-2012, 09:47 PM   #2
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Are you talking about a tow hook that is mounted to the bottom of the bumper? If so, those aren't the best way to go since they can get hung up on the trail.

The below is a very good way to mount a tow hook if you're intending to really get into offroading.
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Old 03-29-2012, 09:55 PM   #3
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Originally Posted by Jerry Bransford View Post
Are you talking about a tow hook that is mounted to the bottom of the bumper? If so, those aren't the best way to go since they can get hung up on the trail.

The below is a very good way to mount a tow hook if you're intending to really get into offroading.
Yeah I was going to do that but desided I didn't want to drill any holes lol and I got the stock one for 5 bucks I don't do any extreme off roading so not to big of a deal as of yet
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Old 03-29-2012, 09:56 PM   #4
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You only have to drill one hole, since one hole is already there, through one side of the frame to mount it like that. That method is by far the strongest.
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Old 03-29-2012, 10:00 PM   #5
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You only have to drill one hole, since one hole is already there, through one side of the frame to mount it like that. That method is by far the strongest.
Ok well if I do end up doing that do I need nuts on the other end of the bolts (inside frame)? would it be wise to have one on both sides?
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Old 03-29-2012, 10:03 PM   #6
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Quote:
Originally Posted by fourty4magjr View Post
Ok so I searched and found tons of threads about the bolt size but never actually got an answer on the actual size. So my questions are is the bolt that is in the rear bumper (that needs used) the right size for both holes? And I also noticed there a special thing that holds the nut still on the tow hook to tighten it and it hangs out of the frame do I need it? Do I need to have a nut as well? Last (I think) if the bumper bolt isn't the right size then what is? Any help is appreciated!!! Thanks!!!
The bolt on the rear bumper should work just fine. I replaced mine with a standard bolt so I didn't have to mess with the factory torx bolt. That little thing with the nuts that go inside the frame is a plus but not needed imo. I had a body shop lose mine and not able to relocate a new one so I used a standard bolt, washer and lock washer. I was only able to use 1 bolt because getting the 2nd top bolt in was nearly impossible because of the lack of space to work with. It seems solid but I am sure it's not as solid as it would be with 2 bolts on the side.
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Old 03-29-2012, 10:06 PM   #7
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Ok well if I do end up doing that do I need nuts on the other end of the bolts (inside frame)? would it be wise to have one on both sides?
The washers and nuts are fished up inside the frame with your fingers via an opening that is already present on the bottom of the frame. It's good to have a tow hook on both sides of the frame but you an start with just one.

Be sure to only use Grade 5 or Grade 8 (Grade 8 is stronger than Grade 5) nuts and bolts for your tow hooks. Standard grade nuts and bolts are not strong enough for tow hooks or other recovery points.

Edit: One final comment... if you go with my recommended method, do not drill through both sidees of the frame and place the washers and nuts on the outside of the other side of the frame. The frame should not be compressed together like that, just pass the bolts through one side and place the washers and nuts up inside the frame.
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Old 03-29-2012, 10:09 PM   #8
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The bolt on the rear bumper should work just fine. I replaced mine with a standard bolt so I didn't have to mess with the factory torx bolt. That little thing with the nuts that go inside the frame is a plus but not needed imo. I had a body shop lose mine and not able to relocate a new one so I used a standard bolt, washer and lock washer. I was only able to use 1 bolt because getting the 2nd top bolt in was nearly impossible because of the lack of space to work with. It seems solid but I am sure it's not as solid as it would be with 2 bolts on the side.
I'm confused where there would be a top bolt lol? Also I'm sure that only using 1 bolt is unsafe...
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Old 03-29-2012, 10:17 PM   #9
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Originally Posted by Jerry Bransford View Post
The washers and nuts are fished up inside the frame with your fingers via an opening that is already present on the bottom of the frame. It's good to have a tow hook on both sides of the frame but you an start with just one.

Be sure to only use Grade 5 or Grade 8 (Grade 8 is stronger than Grade 5) nuts and bolts for your tow hooks. Standard grade nuts and bolts are not strong enough for tow hooks or other recovery points.
Ol so there is an opening big enough to tighten the nut down with a wrench? Sorry it's to dark for me to go check this stuff out lol.
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Old 03-29-2012, 10:33 PM   #10
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I'm confused where there would be a top bolt lol? Also I'm sure that only using 1 bolt is unsafe...
Maybe I am not sure if you are using the same tow hooks I am. Mine have a bracket that bolts to the frame, 1 bolt on the bottom and 2 on the side. The tow hook then bolts to the bracket with 2 big bolts. I only have 1 bolt in the side of one of them and 1 bolt on the bottom.

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Old 03-29-2012, 10:36 PM   #11
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Maybe I am not sure if you are using the same tow hooks I am. Mine have a bracket that bolts to the frame, 1 bolt on the bottom and 2 on the side. The tow hook then bolts to the bracket with 2 big bolts. I only have 1 bolt in the side of one of them and 1 bolt on the bottom.

Hahah yeah you have them fancy ones I just picked up a stock one that bolts to the bottom of the frame using two bolts. Got it for $5 couldn't pass it up and I made a new jeep buddy!
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Old 03-29-2012, 11:17 PM   #12
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Ol so there is an opening big enough to tighten the nut down with a wrench?
Yes, a combination box-end/open-end wrench fits fine up inside there.
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Old 03-29-2012, 11:19 PM   #13
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Yes, a combination box-end/open-end wrench fits fine up inside there.
Awesome thanks! Might end up doing that then instead guess I'll just be selling the tow hook that I bough lol
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Old 03-30-2012, 01:07 PM   #14
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Ahhh I don't even have the lower bolts on the rear bumper there non existent just holes there. I'd like to Atleast have those does anyone know what the size and thread patent those are?
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Old 03-30-2012, 01:35 PM   #15
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The right way to do this is to mount the hooks on with 2 grade8 bolts and nuts, and don't go threw both sides of the frame you actually put the nut inside the frame?
so like this -|*| < the star is the nut lol, and the | is the frame and the - is the bolt. ?
did I confuse you haha.
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Old 03-30-2012, 01:42 PM   #16
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^^^ that's correct. You drill one hole and put the nut inside the frame.
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Old 03-30-2012, 01:44 PM   #17
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Ok thanks, that should clear up most confusion! Any Idea on what size bolts too use? thanks btw!
I had 2 tow hooks laying around from my previous bumper that were going to waste maybe i'll throw them on during the weekend!
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Old 03-30-2012, 02:29 PM   #18
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Ok thanks, that should clear up most confusion! Any Idea on what size bolts too use? thanks btw!
I had 2 tow hooks laying around from my previous bumper that were going to waste maybe i'll throw them on during the weekend!
Yours didn't come with the bolts? I got 3 2 for the front and 1 for the rear and they came with nuts and bolts. But never put the one in the rear cuz I didn't want to drill a hole in the frame lol so I picked up a stock rear tow hook and don't have any of the bolts the ones in the bumper are missing. But if you don't get an answer soon I'll measure them and post it for you
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Old 03-30-2012, 02:37 PM   #19
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The correct size bolt is the biggest diameter Grade 5 or Grade 8 bolt that wil fit through the holes in the tow hooks. 1/2" if I recall correctly.
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Old 03-30-2012, 03:38 PM   #20
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Quote:
Originally Posted by Jerry Bransford View Post
Are you talking about a tow hook that is mounted to the bottom of the bumper? If so, those aren't the best way to go since they can get hung up on the trail.

The below is a very good way to mount a tow hook if you're intending to really get into offroading.
This is how I have mine setup. I inquired a while back about getting a used OEM hook. Everyone wanted at least $25 for it.
The #10k hook like Jerry has posted is $4 at 4wheel parts. The two grade 8 bolts, nuts, and washers are another $4 or so.

You end up with a tow hook as strong or stronger than the OEM hook, and it is tucked up out of the way.
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Old 10-08-2012, 11:42 AM   #21
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What size wrench are you guys using?

I have Grade 8 1/2in bolts, so they have 3/4in socket/heads. I have gone through 3 of my sets of box end wrenches and i can only get to 1 of the 2 bolts on each side.

Do they make low profile box end wrenches? Mine frame rail has a weird oval and then smaller circle on the bottom to access bolts.
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Old 10-08-2012, 12:08 PM   #22
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The only time I have heard of not being able to access both from inside the frame is if the tow hook was mounted at a different angle. You used the existing bolt hole and drilled one more right? I know both can be accessed if the tow hook is mounted like is shown in post #2 above.
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Old 10-08-2012, 01:31 PM   #23
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mine are exactly like that picture. I can't even get a wrench on the factory hole. Maybe i need a better offset wrench. I can get it in there and feel the bolt, I just can't get the wrench on the bolt, not a lot of wiggle room.
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Old 10-08-2012, 02:12 PM   #24
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IIRC I used an open end wrench on those nuts, installed a lock washer under the nut first, and then turned the bolt head to tighten it with a ratchet.
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Old 10-08-2012, 02:38 PM   #25
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Finally got it! Used lock nuts too. Had to install first nut bolt on factory holes. Once they were tight. Put in second hole which is right above the hole. Leaving the second bolt gave me just enough room to get the wrench in there.

I was trying with both bolts on there at first.

I used a stubby 3/4 and an offset 3/4. I wish I could have fit a 3/4 open end in there. All mine were to wide. I was about to grind down one of my china wrenches to see of I could fit.

Oh the "simple" projects that turn into an hour.
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Old 10-08-2012, 02:41 PM   #26
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you need to use one of the access holes under the bottom of the frame. I forgot which one of the holes I needed to drill. Do not drill both sides of the frame. The nuts need to be instide of the frame.

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