Eco diesel Suspension bottoming out on normal roads

[PackMule]

Ok…. So if the springs are the same part between 21 and 22….. and the coils are the same length (stock rubicon coils 21 and 22) the space difference could only be 2 things.

The new coils have not started sagging yet, or there is a different spring isolator above that he 22 coils. Like a spacer…???

It appears that on stock springs, '21 and '22, the spacing between the strike-plate on the axle and the metal lip of the coil retainer tower/tube has been pretty consistent at about 2.5" or so. (Ref: OP's measurements, my measurements, and 22EcoD's on stock springs)

Once you put the Mopar lift in, that expands to 3.5"+ (ref: your measurements and SargeDiesel)

And if the Coil retention tower/tubes are the same length at 6.25, then really the only difference is the gray poly collar around the bump. That seems to be the "fix" for '22

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[portalgun]

Thought I'd share an update on my 21 JTRD. Called my service center and talked to the guy who does all of their lifts and specialty projects. He pulled up the star case and then talked to their Jeep rep when he was at the shop last Friday. Said that they won't approve the Mopar lift as a fix because they have one in the works that will be approved within the next month or two. This was all in a vm so I will call back Monday to get more details as to what that fix is expected to be.

I'm also going to ask if they can put a dollar value on what the repair would be so that I could apply that amount and pay the difference to go to the Mopar 2" diesel lift if desired. My guess is that won't be an option, but worth it to ask.

I do like the ride height mostly where it is at as any higher and I'd have to figure out a step up situation as my kids wouldn't be able to climb up in as they can now at the current 33" wheel stock ride height. On the other hand, I'm definitely going with 35" tires at some point in the future and it sounds like stock ride height has the possibility of rubbing on trails with those size tires.

 

[PackMule]

Thought I'd share an update on my 21 JTRD. Called my service center and talked to the guy who does all of their lifts and specialty projects. He pulled up the star case and then talked to their Jeep rep when he was at the shop last Friday. Said that they won't approve the Mopar lift as a fix because they have one in the works that will be approved within the next month or two. This was all in a vm so I will call back Monday to get more details as to what that fix is expected to be.

I'm also going to ask if they can put a dollar value on what the repair would be so that I could apply that amount and pay the difference to go to the Mopar 2" diesel lift if desired. My guess is that won't be an option, but worth it to ask.

I do like the ride height mostly where it is at as any higher and I'd have to figure out a step up situation as my kids wouldn't be able to climb up in as they can now at the current 33" wheel stock ride height. On the other hand, I'm definitely going with 35" tires at some point in the future and it sounds like stock ride height has the possibility of rubbing on trails with those size tires.

You list you have a Rubicon, so apart from this bottom out issue, you would be fine going to 35's with stock suspension, no rubbing for lite wheeling. You WOULD need to watch your breakover and departure angles, but rubbing shouldn't be an issue.

I don't think the dealers, nor JeepCares know yet what the "fix" will include. But if we are using the '22's as a reference point, it seems to just be a different bumpstop with a collar that wouldn't be more than $100.

 

[22EcoDs]

What I also know is that I have approximately 1 3/4" from bump stop to contact point on axle. That dowel is 1 3/4" long.

You def have a different bump stops than me.

 

[Free2roam]

You def have a different bump stops than me.

21 Sport S Ecodiesel

 

[Courtsm3]

I added my 2.5” lift and kept my teraflex 1.5” bump spacers. Basically gave my an additional 1” of jounce space. Seems better so far without hitting an FSR yet.

 

[yrwins]

Hey guys I just pick up my rubicone diesel 2022 and I can confirm, I doesn’t bottoming out.

 

[DenverBob]

Hey guys I just pick up my rubicone diesel 2022 and I can confirm, I doesn’t bottoming out.

Not bottoming out? Oh cool thanks. Waiting for delivery of JTRD so watching the ‘22 reports closely. Can you provide info on the speed and type of roads with no issues… potholes….speed bumps… FSRs? Steel winch capable or ‘plastic’ stock bumper?

 

[Free2roam]

So... a Bad News update on my end...

JeepCares declined doing Mopar lift, stating its too close in time to when the TSB fix is coming out. Bummer for me, as I've been waiting over a year with this problem, and am worried after 25k miles on the truck I might have incurred collateral damage from the hits, even after babying this thing for a year.

Per your request, I inquired with Ben the Service Advisor at Lithia of Reno and was advised that the fix for the STAR CASE: S2102000011 has not yet been approved by corporate. The remedy is not yet available, and unfortunately I am unable to have the lift kit installed, as per previous decisions, per management. Until a fix comes out, there is not currently an approved remedy for the bottoming out issue on your vehicle.
I never actually asked for a lift kit. It was more for the fix. Would have a lift kit been good? Yeah it would have. Do they owe us that? No. But the fact is it still needs to be remedied. I hope it's not another 6 months.

 

[OrangeCJ]

I know that that there has been some hot posts on if Jeep Owes us something... I am not looking for a blank check, or a refund, I want the rugged, top of the line Jeep I paid for. I want it to NOT bottom out going over speed bumps, at the Speed Limit. I want what they sold me.

.

I think it should perform as advertised. Maybe that is a magical Mojave in the video, but again, I am not bombing through the desert, I am going through a School Zone at the posted speed.

Russell asks "Are you not entertained?" and based on the experience of the last months of going back and forth, I must say, I am NOT.

Just frustrated... Needed to vent

 

[am1978]

I know that that there has been some hot posts on if Jeep Owes us something... I am not looking for a blank check, or a refund, I want the rugged, top of the line Jeep I paid for. I want it to NOT bottom out going over speed bumps, at the Speed Limit. I want what they sold me.

.

I think it should perform as advertised. Maybe that is a magical Mojave in the video, but again, I am not bombing through the desert, I am going through a School Zone at the posted speed.

Russell asks "Are you not entertained?" and based on the experience of the last months of going back and forth, I must say, I am NOT.

Just frustrated... Needed to vent

I guess they knew better than to release the Mojave with the diesel.

 

[Suho]

I have a 21 JTRD that has been bottoming out on dirt roads/speed bumps/expansion joints/etc. This past weekend I installed a teraflex 1.5 leveling kit with sumosprings front bump stops. I left the bumpstop extensions from the leveling kit out since I don't want to limit uptravel more than stock, I think if you want to install larger tires the extensions would be necessary.

Anyway, since the install I haven't been able to bottom out hard (metal on metal) like I had been before. Obviously the axle now contacts the sumosprings but it doesn't seem harsh at all to me. Now that it's winter I haven't been able to test on dirt roads at all and I can't test articulation easily but for on road driving and speed bumps my problem is solved. Total I spent ~$300 so it might be worth a try.

 

[PackMule]

I have a 21 JTRD that has been bottoming out on dirt roads/speed bumps/expansion joints/etc. This past weekend I installed a teraflex 1.5 leveling kit with sumosprings front bump stops. I left the bumpstop extensions from the leveling kit out since I don't want to limit uptravel more than stock, I think if you want to install larger tires the extensions would be necessary.

Anyway, since the install I haven't been able to bottom out hard (metal on metal) like I had been before. Obviously the axle now contacts the sumosprings but it doesn't seem harsh at all to me. Now that it's winter I haven't been able to test on dirt roads at all and I can't test articulation easily but for on road driving and speed bumps my problem is solved. Total I spent ~$300 so it might be worth a try.

I've been considering these, but wondering how much spacing would be needed to accommodate the increased length of the sumo spring. Your pics really help out, so basically they'd install with a 1.5" spacer. ?

Per the manufacturer, these are supposed to compress 85%, which would be right about at the top groove. If I were you, i'd want to test full articulation before I did any serious trail whomping, but I think you're probably ok for normal stuff.

How much of a gap do you have between the tip of the sumo and the stock bump plate?
Did you use shock extenders with the 1.5" spacer lift, or is everything still stock with the shocks?

 

[Suho]

I've been considering these, but wondering how much spacing would be needed to accommodate the increased length of the sumo spring. Your pics really help out, so basically they'd install with a 1.5" spacer. ?

Per the manufacturer, these are supposed to compress 85%, which would be right about at the top groove. If I were you, i'd want to test full articulation before I did any serious trail whomping, but I think you're probably ok for normal stuff.

How much of a gap do you have between the tip of the sumo and the stock bump plate?
Did you use shock extenders with the 1.5" spacer lift, or is everything still stock with the shocks?

I have about a 1 inch gap between the stock bump plate and the sumo spring. I don't know where my tape is but you can get an idea from the pictures.

The teraflex kit didn't come with shock mount brackets and I don't really think they will be necessary. I still have the same total travel I just sit higher in the travel when stationary. The only risk I can think of is topping out with an extra 1.5 inches of preload on the spring, but I expect the shocks will handle the extra forces just fine.

So far testing speedbumps at ~25mph is just fine with no bottoming out, though at that speed it seems too fast anyway.

Pics are of driver and passenger sides.

 

[PackMule]

I have about a 1 inch gap between the stock bump plate and the sumo spring. I don't know where my tape is but you can get an idea from the pictures.

The teraflex kit didn't come with shock mount brackets and I don't really think they will be necessary. I still have the same total travel I just sit higher in the travel when stationary. The only risk I can think of is topping out with an extra 1.5 inches of preload on the spring, but I expect the shocks will handle the extra forces just fine.

So far testing speedbumps at ~25mph is just fine with no bottoming out, though at that speed it seems too fast anyway.

Pics are of driver and passenger sides.

T

Thanks!
The philosophy on these is that you want at least 1/2 or 3/4" before engaging the bump so that you have a stock ride for normal driving. Looks like you've got at least 1", so it looks like someone could get by with 1-1.25" spacers and still be good.

Good to hear also that these are not too harsh in cold weather (upstate NY). Another member posted that a competitive product the material got too stiff when cold and was harsher than hitting the metal lip. So he removed it. So good to hear this could be an option even in cold weather with at least 1-1.25" lift.

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