Eco diesel Suspension bottoming out on normal roads

Gruffid

Well-Known Member
First Name
Jay
Joined
Sep 4, 2020
Messages
185
Reaction score
130
Location
San Antonio, TX
Vehicle(s)
2020 JLUR 3.6L; 2021 JTR EcoDiesel
Build Thread
Link
Is anyone else experiencing their JT bottoming out on roads that other cars (trucks, JL Rubicon, anything else really) don’t have problems with?

It happens even with undulations in the road, not just pot holes and railroad tracks.

I have a JTDR, stock suspension.
Advertisement

 
Last edited:

Moe_Fugga

Banned
Banned
First Name
Jason
Joined
Jan 1, 2020
Messages
817
Reaction score
1,294
Location
GA
Vehicle(s)
2020 Gladiator
Bad shocks probably? Are you carrying crazy weight like steel bumpers, RTT, winch, etc.?

Post photos. Are you sagging on level ground?
 

sdk131

Well-Known Member
Joined
Jul 27, 2020
Messages
295
Reaction score
434
Location
Calvert County, MD
Vehicle(s)
2021 Gladiator Sport S w/ Max Tow - Sarge Green
Bad shocks probably? Are you carrying crazy weight like steel bumpers, RTT, winch, etc.?

Post photos. Are you sagging on level ground?
exactly...we need some more info here...but no, it would not at all be normal for it to bottom out in stock form under "normal/average" road undulations with no major load.
 

Renegade

Well-Known Member
First Name
Zac
Joined
Sep 11, 2017
Messages
3,370
Reaction score
4,178
Location
Signal Mountain, TN
Vehicle(s)
2020 JT
Build Thread
Link
When you say bottoming out, do you mean that the jounce bumpers (rubber bump stops) are fully compressing in their cups, allowing metal on metal contact? It's normal to have contact between the jounce bumpers and the pads inside the lower coil on big bumps.
 
OP
OP

Gruffid

Well-Known Member
First Name
Jay
Joined
Sep 4, 2020
Messages
185
Reaction score
130
Location
San Antonio, TX
Vehicle(s)
2020 JLUR 3.6L; 2021 JTR EcoDiesel
Build Thread
Link
I don’t have any heavy upgrades yet. Just a couple of KC lights and a radio currently.

I think it’s the bump stops hitting, but it hasn’t happened on my previous vehicles or our JL.

B5CB8EED-DCBD-4754-8392-DB062ECB0ABC.jpeg


A746E146-51E1-4578-B8D9-254A1B3CD7E1.jpeg


B791CEA2-631B-4CFA-8D39-5266867FBE3C.jpeg
 

CerOf

Well-Known Member
Joined
Jan 1, 2021
Messages
1,035
Reaction score
1,105
Location
Dallas
Vehicle(s)
‘21 JTRD
It’s the extra weight of the diesel.
My JTDR will hit the bump stops on things the wife’s QX just soaks up.

the diesel adds, what, ~400lbs more?
 

Mac Attack

Well-Known Member
First Name
Mac
Joined
Feb 27, 2020
Messages
350
Reaction score
310
Location
PA
Vehicle(s)
Will be buying Jeep Gladiator
Occupation
Whatever you want...I can supervise!
I don’t have any heavy upgrades yet. Just a couple of KC lights and a radio currently.

I think it’s the bump stops hitting, but it hasn’t happened on my previous vehicles or our JL.

B5CB8EED-DCBD-4754-8392-DB062ECB0ABC.jpeg


A746E146-51E1-4578-B8D9-254A1B3CD7E1.jpeg


B791CEA2-631B-4CFA-8D39-5266867FBE3C.jpeg
How many inches between the bottom of the bump stop and where it hits?
 

OP
OP

Gruffid

Well-Known Member
First Name
Jay
Joined
Sep 4, 2020
Messages
185
Reaction score
130
Location
San Antonio, TX
Vehicle(s)
2020 JLUR 3.6L; 2021 JTR EcoDiesel
Build Thread
Link
I was thinking it was the extra weight of the diesel too, but didn’t they put heavier duty springs and shocks to make up for that extra weight?

my F-150 3.0L diesel didn’t hit bump stops on the same road.

I guess what I’m I hearing you saying is I need an aftermarket suspension lift?
 

Hardhead

Well-Known Member
Joined
Jan 2, 2021
Messages
60
Reaction score
39
Location
Brigantine, New Jersey
Vehicle(s)
06 Ram Diesel, 95 Jeep Wrangler, 21 Jeep Gladiator
The diesel I test drove did the same thing. This is why I went with the gas engine
 

sdk131

Well-Known Member
Joined
Jul 27, 2020
Messages
295
Reaction score
434
Location
Calvert County, MD
Vehicle(s)
2021 Gladiator Sport S w/ Max Tow - Sarge Green
That is pretty pathetic if it is bottoming out on just normal/average road undulations with no extreme weight in (or added to) the vehicle. I have read that the diesel added about 400 pounds to the front end but you would think they installed heavier springs to offset this. Perhaps there were/are some screw ups on the early models and the wrong springs were installed? It would be interesting to have another diesel owner (that hopefully has not observed this issue) take the same pics and measure the distance between the bumpstops and the "pad" they hit.
 

CerOf

Well-Known Member
Joined
Jan 1, 2021
Messages
1,035
Reaction score
1,105
Location
Dallas
Vehicle(s)
‘21 JTRD
Mine does not bottom on simple road road undulations.

It will only hit bump stops on dips where the sign says “20mph” .
I can go 25 just fine. 30mph and I touch bump stops.

wife’s QX is 30. My kids Xterra is 30+, but I lifted it. :)
 

Moe_Fugga

Banned
Banned
First Name
Jason
Joined
Jan 1, 2020
Messages
817
Reaction score
1,294
Location
GA
Vehicle(s)
2020 Gladiator
I was thinking it was the extra weight of the diesel too, but didn’t they put heavier duty springs and shocks to make up for that extra weight?

my F-150 3.0L diesel didn’t hit bump stops on the same road.

I guess what I’m I hearing you saying is I need an aftermarket suspension lift?
I’m no expert, but those photos look like the coil is compressed under the weight of the diesel. I don’t have stock suspension anymore or I would check the length of my springs for you to compare to a gasser. That’s got to be the wrong coils for that model....
 

Renegade

Well-Known Member
First Name
Zac
Joined
Sep 11, 2017
Messages
3,370
Reaction score
4,178
Location
Signal Mountain, TN
Vehicle(s)
2020 JT
Build Thread
Link
I’m no expert, but those photos look like the coil is compressed under the weight of the diesel. I don’t have stock suspension anymore or I would check the length of my springs for you to compare to a gasser. That’s got to be the wrong coils for that model....
You can tell that the factory installed the wrong springs on his Jeep by looking at a photo of a tape measure which isn’t even placed so that suspension ride height can be accurately measured?
 
OP
OP

Gruffid

Well-Known Member
First Name
Jay
Joined
Sep 4, 2020
Messages
185
Reaction score
130
Location
San Antonio, TX
Vehicle(s)
2020 JLUR 3.6L; 2021 JTR EcoDiesel
Build Thread
Link
Renegade, how would you suggest I place the tape measure?
 
Advertisement

 
Advertisement
Top