I made some rear bump stops. what do you think?

[Plastics guy]

HA!! Not on your life. That there is my baby. I've had her for 25 years. Swapped in a 350 small block and SM465 about 23 years ago. She was my daily driver until about 5 years ago. She's a beastie. Plus, my wife of just under a year LOVES her. Power-nothing, drives like a tank, 8000 lb. Ramsey winch on the front.
The only drawback...parts are somewhat difficult to find. Was doing brake cylinders a while back. The rear cylinders crossed to a 59 International or some such, and the fronts were a 40 something Ford. She doesn't have new springs because you can't buy them; have to be custom made.
She's worth every bit of the P.I.A. of finding parts.

Sounds Badass! I love the older Jeeps...

I've had more than a few problems with a JK I have...
C.E.L. <---- Its a Jeep Thing...:nod:

 

[schmauster]

Looks good. I'd buy them if i had a use for them

 

[Rockdawg84]

I'm in! PM sent.:clap2:

 

[TonyB66]

AWESOME!! PM me a picture. I had a 64 Wagoneer for a bit. Great vehicle. Had to sell it. Also had a 73 J3000 for a few years. Was pretty much the twin of my 72, just in 3/4 ton.
Also PM about parts for your 63. We've got a shop here in town that is really good with old Jeep stuff.

No photos handy, and least digital ones. Not to sure when I'll have time for it as I'm looking-forward to working on the 4Runner more, after a house remodel is complete. I will most certainly contact you regarding parts though. Thanks much.

 

[theesotericone]

Got the front bumps in the mail yesterday. I've been a bit stressed for time lately but I managed to sneak in 10 minutes today to get them installed. I'll post wheeling feedback at a future date.

Fit and finish was great. Install was about as easy as you get. Everything is included, even that cute little one-use packet of loctite. I'll give a quick install guide here.

Step 1; Remove old bumps from rear of LCA with 11" Knipex Cobras. Channel locks will work fine too. lol

Step 2. Take a scraper and clean all the mud you forgot to clean off a few months ago from the LCA's..

Step 3: Drop bolt in new front bump and coat threads with loctite using the provided package.

Step 4: Install new bump in factory location with 14mm deep socket. Tighten loosely.

Step 5: Rotate bumps so the thinnest part of the casing is pointed towards the center of the rig.

Step 6: Tighten to desired torque. I used a 7" 3/8" drive socket and some muscle.

Step 7: Repeat on the other side.

That's all there is to it. It took me twice as long to type that then to actually do the install.

I've been wanting some one to do these for as long as I've had my rig. So thanks [MENTION=146407]Plastics guy[/MENTION] for stepping up and taking care of this. I'm looking forward to getting them some abuse soon.

 

[jkeith.w]

Thank you!!!

I couldnt agree more about [MENTION=28464]eimkeith[/MENTION]. I was fortunate to have jumped on board with his PCK's really early on(I think I was in the first batch). It was amazing watching him work his magic in the design. Very talented Man.

Its really cool being able to benefit from other members knowledge base. In the last couple weeks I even picked up a R&D engineer.
Its great partnering up and sharing our thoughts with others that know the language. My girlfriend can only stand so much of my geek...

Thank you again to everyone who has offered advice, comments and constructive criticism. Its really made this project fun for me.

you guys are making me blush.

so I'm just getting an chance to read through this thread and I'm all over it - when can I order a full set F/R with the shorter rears??

very nice stuff!

 

[Plastics guy]

you guys are making me blush.

so I'm just getting an chance to read through this thread and I'm all over it - when can I order a full set F/R with the shorter rears??

very nice stuff!

Im glad you had a chance to check out the thread. I am shipping out another batch of bump stops Tuesday 6-19. I believe I have two extra sets of bump stops, So one of those is yours!:bump::bump::bump:

I will double check this afternoon and shoot you a pm.

 

[Plastics guy]

Fit and finish was great. Install was about as easy as you get. Everything is included, even that cute little one-use packet of loctite. I'll give a quick install guide here.

Step 1; Remove old bumps from rear of LCA with 11" Knipex Cobras. Channel locks will work fine too. lol

Step 2. Take a scraper and clean all the mud you forgot to clean off a few months ago from the LCA's..

Step 3: Drop bolt in new front bump and coat threads with loctite using the provided package.

Step 4: Install new bump in factory location at the rear of the a-arm with 14mm deep socket. Tighten loosely.

Step 5: Rotate bumps so the thinnest part of the casing is pointed towards the center of the rig.

Step 6: Tighten to 25-30 in lb. I used a 7" 3/8" drive socket and some muscle.

Step 7: Repeat on the other side.

That's all there is to it. It took me twice as long to type that then to actually do the install.

LOL Yeah, Instructions.... Im good with plastics, not so much with instructions... I was the kid trying to build with Lego's and no instructions. It made for some interesting builds.

Thank you [MENTION=143526]theesotericone[/MENTION] for this wonderful instruction sheet. I'm going to print it out and send it out with my bump stop kits.

Really looking forward to what you think about the front bump stops after a couple of trail runs!

 

[theesotericone]

LOL Yeah, Instructions.... Im good with plastics, not so much with instructions... I was the kid trying to build with Lego's and no instructions. It made for some interesting builds.

Thank you [MENTION=143526]theesotericone[/MENTION] for this wonderful instruction sheet. I'm going to print it out and send it out with my bump stop kits.

Really looking forward to what you think about the front bump stops after a couple of trail runs!

Sweet. I've never been published before. Thanks

When I got my first set of Lego's they didn't have instructions. You built whatever you wanted. You just had to figure out how they snapped together. I built some cool stuff, sans instructions. This new wave of Lego's would confuse the crap out of me. lol

I'm really looking forward to what I think after a few trail runs. That was the whole point of my post way, way back up thread. Thanks again for taking this idea and running with it.

 

[Rockdawg84]

Got my set yesterday and man they are nice! I cant wait to get these on and try them out.:clap2::clap2::clap2:

 

[Pats98]

Installed mine yesterday, hitting the trail today for some "testing"

 

[Black798]

Been super busy lately but I installed mine in the front last Tuesday. I've tested them pretty extensively so far in a lot of high-speed sections and they are working very well. The suspension is much more controlled and doesn't bottom out really at all. It's very smooth.

The one concern I have, and [MENTION=146407]Plastics guy[/MENTION] you'll have to chime in on this if it's even an issue, but to me when rock crawling and stuffing the tire ALL the way into the fender well, it seems like the base of the bump stop might be cutting into the rubber. So far I haven't seen any evidence of this being an issue but it might affect the longevity.

<a data-flickr-embed="true" href="https://www.flickr.com/photos/147275993@N05/42108042494/in/album-72157697093590395/" title="IMG_8707"><img src="https://farm2.staticflickr.com/1735/42108042494_d5a4b48e51_b.jpg" width="1024" height="683" alt="IMG_8707"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
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[theesotericone]

Got a chance to test out the fronts on some high speed dirt and slow speed rock up in Coyote Flat today.

I'm extremely happy with how the performed. I know Coyote very, very well so I figured it would be the perfect litmus test. There's a stretch out by the old landing strip that allows for some high speed fun on, mostly, good dirt with some big woops.. With the stock front bumps 35 MPH was about the limit before it felt like I was going to break a shock.

With [MENTION=146407]Plastics guy[/MENTION] front bumps I was easily able to hold 45 MPH and still feel in control. I pushed it to 55 just to be an ass and that was probably too much. lol

To test the crawling performance I headed up to Baker Creek. There's a few spur roads out that way that I've taken some really hard bottom outs on. I still bottomed out coming off a few drops but it was way, way more mellow. It's a slower deceleration before the rock hard factory backup activates. I repeated that section a few times to try and break a bump. They still look and act fine.

I think he nailed it.

 

[Tyler James Inc]

Awesome to hear [MENTION=143526]theesotericone[/MENTION]! Wish I knew of areas around me I could hit at high speed. [MENTION=146407]Plastics guy[/MENTION] definitely does killer work.

 

[Plastics guy]

Been super busy lately but I installed mine in the front last Tuesday. I've tested them pretty extensively so far in a lot of high-speed sections and they are working very well. The suspension is much more controlled and doesn't bottom out really at all. It's very smooth.

The one concern I have, and [MENTION=146407]Plastics guy[/MENTION] you'll have to chime in on this if it's even an issue, but to me when rock crawling and stuffing the tire ALL the way into the fender well, it seems like the base of the bump stop might be cutting into the rubber. So far I haven't seen any evidence of this being an issue but it might affect the longevity.

Glad to hear how smooth they have been. I have not seen any evidence of the base cutting into the rubber at all. I don't believe that it will be a problem.
The bump stops I designed for the Tacoma's have a round base. I like the look of them a bit more, so I just might swap this design over to have a round base opposed to the hex shape.

As always, you find a way to break em and I'll find a way to make em!:thumb:

Got a chance to test out the fronts on some high speed dirt and slow speed rock up in Coyote Flat today.

I'm extremely happy with how the performed. I know Coyote very, very well so I figured it would be the perfect litmus test. There's a stretch out by the old landing strip that allows for some high speed fun on, mostly, good dirt with some big woops.. With the stock front bumps 35 MPH was about the limit before it felt like I was going to break a shock.

With [MENTION=146407]Plastics guy[/MENTION] front bumps I was easily able to hold 45 MPH and still feel in control. I pushed it to 55 just to be an ass and that was probably too much. lol

To test the crawling performance I headed up to Baker Creek. There's a few spur roads out that way that I've taken some really hard bottom outs on. I still bottomed out coming off a few drops but it was way, way more mellow. It's a slower deceleration before the rock hard factory backup activates. I repeated that section a few times to try and break a bump. They still look and act fine.

I think he nailed it.

Thank you, Thank you, Thank you, :lookout::dancin:

Thats a lot of skinny pedal! 55mph moving!!!

 

[theesotericone]

Thats a lot of skinny pedal! 55mph moving!!!

Yeah, moving too fast without long travel. I'll tell the full story.

That stretch I usually do 35 MPH through has two woops at the end that are fairly large. The stretch is about 2.5 miles long. You have to brake every now and again for rocks. So I'm listening to the new Perfect Circle and hitting it at 45 then slowing when needed. I am so stoked on how it feels.

After the last rock section there's a 1/2 mile flattish stretch. I put the skinny pedal down harder and the gears do there thing. 55 MPH on dirt and in control. Like really in control.

I'm having such a good time I forgot about those last two woops. Now, when your not driving like a jack ass, you can hit one and the front tire hits the downhill side of the next. Since I'm flying I realize that physics dictates that I will go further. I try to brake at the last second but my front tires are already in the first woop.

I do a quick brace for impact. The front tires come down hard on the uphill side of the next woop. I bottom out hard. Hard enough to not have the truck rebound off the woop. It keeps going straight and I stop.

I'm thinking something has to be broken. I get out and check both the front and rear end. Nothing is obviously broken. I get back in and drive like a normal person. Everything feels fine. I get out again at the Baker Creek turn-off to double check. Nothing is broken.

I can safely say that is the hardest hit those front bumps will ever take from me. So the moral if this little story is:

Just because you finally have new front bumps it doesn't mean you have a baja rig. lol

 

[octanejunkie]

Just cause you like baja style tacos doesn't mean you can Baja your Taco

Or however that saying goes [emoji895]

Sent from my Pixel XL using Tapatalk

 

[Black798]

Well I broke one. Actually two...

This weekend I got out on a good trip that really let me test out the bump stops. So friday night I took off to meet some friend for a night of camping. On the way to the camp site there is a section of road (10 miles or so) that is a mostly unmaintained gravel road that is always packed down very well but has some decent whoops and potholes in it. I was consistently doing 50 to 60 on this section, gps said the average was 53, admittedly this was a bit fast but the truck felt stable and controlled so I kept pushing.

About halfway through I hit a big rut with the passenger side tire and there was a massive bang and a slight thump but it didn't feel like I bottomed out, initially I thought I kicked up a rock and it hit a skid or something. I thought it was strange but continued on to camp and gave the truck a good once-over and didn't see anything broken or loose. Next day we did a pretty tough rock crawling trail that had the suspension cycling to the limits several times. Everything cycle smooth, I wasn't rubbing, and the truck went over everything so everything seemed to be business as usual.

Saturday night coming back through the same section of road from Friday I was pushing too keep up with my buddy in his 5th gen so again doing consistently 55. This time there was another large bang on a hit I know didn't bottom the suspension, but exactly like on friday, this time on the drivers side. I look everything over and I see nothing. Didn't even think to look at the bumpstops because I never felt like the suspension had lost any of the bottom out control. So I continued on.

Now onto the breakage. Today Im giving the truck a good once over and I see a shiny spot on the frame right above the bumpstop on the rear of the front lower A-arm.

You can see it here...
<a data-flickr-embed="true" href="https://www.flickr.com/photos/147275993@N05/42990087751/in/album-72157697093590395/" title="IMAG0163"><img src="https://farm1.staticflickr.com/883/42990087751_73daa3b674_b.jpg" width="768" height="1024" alt="IMAG0163"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>

I think "huh I must have bottomed it out and that bolt hit a few times." Out of curiosity I feel the bumpstop and Im surprised to find it split in half! I crawl over to the truck and check the other one. Same thing, split clean in half at the base along the edge of the A-arm.

I think what must have happened is when the suspension really bottomed out in the whoops that the mounting bolt must have contacted the frame causing all the load to be concentrated on that center point which was the bolt head and cast in place washer. It then transferred the force to the weakest point which was the outside edge of the washer that lies right on the line right where the bumpstop base overhangs the A-arm causing the base to fracture and tear the rubber. Im kicking myself now because I had thought of mounting my gopro under the truck to get a video of the bumps working but had forgotten to do so before the trip. I am confident though that the to bangs were the bumpstops rupturing.

More carnage...
<a data-flickr-embed="true" href="https://www.flickr.com/photos/147275993@N05/41180032480/in/album-72157697093590395/" title="IMAG0164"><img src="https://farm2.staticflickr.com/1775/41180032480_f897b8087c_b.jpg" width="768" height="1024" alt="IMAG0164"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
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You can see here how the bumpstop fractured and then rubbed on the A-arm...
<a data-flickr-embed="true" href="https://www.flickr.com/photos/147275993@N05/42940943352/in/album-72157697093590395/" title="IMAG0178"><img src="https://farm2.staticflickr.com/1817/42940943352_3810c20ff7_b.jpg" width="768" height="1024" alt="IMAG0178"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script>
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So what do you think [MENTION=146407]Plastics guy[/MENTION]? Im thinking the hardware needs to be more low profile inside the bumpstop, to prevent the bolt from contacting the frame and then possibly revising the base and using either a stronger material or one that in situations like this will flex more than what the current base is as it seems sort of brittle. or there needs to be a 3/16 steel plate that bolts under the bumpstop to give the plastic a solid surface to brace off of. Let me know what you think...

 

[theesotericone]

Well I broke one. Actually two..

That sounds like it was a good trip.

In light of your breakage I went out and gave mine a close look. The drivers side is fine and shows no signs of damage. The passenger side is broken at the base, exactly where it contacts the LCA. The break stops at the base and does not continue into the rest of the bump. Good catch man.

 

[Plastics guy]

[MENTION=121903]Black798[/MENTION],

My initial thought is that if you plan on doing 50+ mph you should pony up some cash and invest in gas bump stops that are built for higher speeds.

It is clear that you exceeded the ability of my bump stop as well as the OEM bump mounted on the front of the a-arm. :trophy:

I am surprised that the bolt contacted the frame. Your factory front bump stop should have stopped the up travel well before my mounting hardware could hit. So this leads me to thinking you exceeded the factory bump stops abilities.

My bump stop is only acting as a helper or booster. It does not actually stop the up travel at all.
My design is relying on the front bump stop to make the final "stop". So in theory, providing the front bump stop actually stops the up travel my mounting hardware could not make contact.

I can clearly see that the hardware blasted the shit out of your frame, no dispute there. I'm thinking that the speed you were traveling over the whoop simply kicked the front OEM bump stops ass and allowed for it to collapse far enough to allow my bump stops hardware to make contact.

I don't believe there is anything design wise that is going to handle 50+ mph. Like I've said many times I built these for my needs which is trails and light crawling. For the intended use there have not been any failures like this.

I have made a few minor changes to the design in the recent weeks. the base is now round in shape opposed to the Hex shape and the base is slightly thicker. Not thick enough to prevent what happened with you... but thicker.

I'm not really sure what to do here. I can give you another set but they will not handle 50 mph+ and I never claimed they would. Honestly the only solution to safety drive 50 + mph speed off-road is going to be gas shocks.

Providing this failure happened at a reasonable trail speed of say under 40 mph I would absolutely look into changing the design or materials to prevent failures.

How can I make this right??? I am very interested in getting this matter realistically reviewed and resolved. :sad:

edit: I know what to do now!!!! 3/16" steel plate being laser cut! You'll break something else before my bump stop.