Front drive shaft broken

bamanuke · Sep 19, 2024

just noticed, Eibach USA has added the following statement to their 2.5 lift spring description.
Tested with factory dampers. Recommended to pair with Eibach Pro-Truck Reservoir Shocks. Damage could occur to factory drive shaft with change in ride height. Consult instruction manual for proper installation.

C-Mack · Sep 19, 2024

bamanuke said:
just noticed, Eibach USA has added the following statement to their 2.5 lift spring description.
Tested with factory dampers. Recommended to pair with Eibach Pro-Truck Reservoir Shocks. Damage could occur to factory drive shaft with change in ride height. Consult instruction manual for proper installation.

A real vote of confidence when a manufacturer states out in the open their own plausible deniability. Do we need anymore evidence that big lifts on a Grenadier should be avoided at this stage until more engineering is done to the vehicle?

bamanuke · Sep 19, 2024

I just double checked. The statement is in the description for ALL of their Grenadier lift springs.

bamanuke · Sep 19, 2024

one more, A search on their website indicates the referenced shocks are not available for the Grenadier!

TCMColorado · Sep 19, 2024

Standard boiler plate for any aftermarket suspension. Nothing surprising about the disclaimer.

bamanuke · Sep 19, 2024

TCMColorado said:
Standard boiler plate for any aftermarket suspension. Nothing surprising about the disclaimer.

wasn't there until this week, otherwise I would have purchased the shocks when I got the springs in April or either not purchased them.

TCMColorado · Sep 19, 2024

No shocks, either OEM, Eibach or from another aftermarket manufacturer will do anything to change the issue regarding the drive shaft. And if those shocks are longer than the OEM spec then they will only exacerbate the issue.

The bottom line is that suspension modifications on any vehicle, Ineos, Jeep, Toyota or otherwise involve compromises to reliability and durability regardless of whether this happens to be called out in a fine print disclaimer.

Mountain4x4 · Sep 20, 2024

2k for a complete shaft with cardans, vs 164.00. Seems to me its worth a shot with the High Angle CV for now.

LeeroyJ · Sep 20, 2024

C-Mack said:
A real vote of confidence when a manufacturer states out in the open their own plausible deniability. Do we need anymore evidence that big lifts on a Grenadier should be avoided at this stage until more engineering is done to the vehicle?

The thing is in other vehicles (like Jeeps) a 2.5" lift is a tiny lift.

bamanuke · Sep 21, 2024

here ya go
From what we have seen, there is an inherent design issue on the Ineos, as there have been driveshaft failures with the stock suspension. We have added notes to our instructions that specify not to loosen the track bar or control arms, and to not pull down on the axle when trying to remove the OE springs or to install the new Eibach Pro Lift springs. Failure to follow the instructions can possibly pinch or bind the boot causing a failure. In the instructions we specify to use a spring compressor to remove the springs, as well as use the spring compressor to install the lift springs. This is the method we use here and we have yet to see a failure on any of the vehicles we have tested here.

Commodore · Sep 23, 2024

undert0e said:
I'm running a Mickey Thompson 255/85/r17 (34 x 10) on stock steel wheels and stock suspension without rub. I ran the IG from Lake city to American Basin last weekend without issue on this setup.

I’m looking at installing these today. Any issues with the gearing?

PNW_IG · Sep 23, 2024

Commodore said:
I’m looking at installing these today. Any issues with the gearing?

Seems to be fine. I really don't notice much difference. Spedo is actually closer to correct and it uses 8th on the freeway no problem.

Commodore · Sep 23, 2024

PNW_IG said:
Seems to be fine. I really don't notice much difference. Spedo is actually closer to correct and it uses 8th on the freeway no problem.

That is the information that I'm looking for. Thank you!

undert0e · Sep 23, 2024

Commodore said:
I’m looking at installing these today. Any issues with the gearing?

nope

300chris · Sep 25, 2024

255/85/17 are a fantastic combo with this truck. Running the Eibach 2.5”/1.7”
About 3000 miles on this set-up so far. Obviously will keep an eye on the CV joints, but no isisues this far (OWL did the install and disconnected the driveline prior to install). Most miles are lower speed (mostly off-road), so heat is not an issue. Have stuffed the suspension multiple times, and there is never any contact with the wheel wells.

Migs · Sep 25, 2024

Just as FYI:
I'm putting on the TeraFlex Rzeppa High Angle CV joints today/tomorrow morning. I'm replacing the two "middle" CV joints (one on each driveshaft where they meet the transfer case), as those had the most extreme angles. I'll be doing some highway driving and offroading this weekend (traveling about 70 miles each way on highway (70-80 mph)) with these new CV joints, so can reply if there are any issues.

Side note: I talked with John Brindell (from Agile Offroad) today, who was super nice and helpful. He's had the same Rzeppa High Angle CV on his Grenadier for over a thousand miles, of both highway driving and pretty rough (not extreme) offroading where he said he really stretched out the suspension. He said his are holding up great, he has had no issues.

C-Mack · Sep 25, 2024

Migs said:
Just as FYI:
I'm putting on the TeraFlex Rzeppa High Angle CV joints today/tomorrow morning. I'm replacing the two "middle" CV joints (one on each driveshaft where they meet the transfer case), as those had the most extreme angles. I'll be doing some highway driving and offroading this weekend (traveling about 70 miles each way on highway (70-80 mph)) with these new CV joints, so can reply if there are any issues.

Side note: I talked with John Brindell (from Agile Offroad) today, who was super nice and helpful. He's had the same Rzeppa High Angle CV on his Grenadier for over a thousand miles, of both highway driving and pretty rough (not extreme) offroading where he said he really stretched out the suspension. He said his are holding up great, he has had no issues.

Let us know if there is any driveshaft droning or vibrations after you switch them out especially at highway speeds. I would assume each driveshaft is balanced as a complete assembly with both stock joints in place and I’m curious if switching out a joint is enough to take it out of balance… hopefully not. (Just a thought but maybe put witness marks on your old joints and shafts before you take them apart in case you have to put them back in and maintain their relationship to each other for balance purposes)

Migs · Sep 26, 2024

C-Mack said:
Let us know if there is any driveshaft droning or vibrations after you switch them out especially at highway speeds. I would assume each driveshaft is balanced as a complete assembly with both stock joints in place and I’m curious if switching out a joint is enough to take it out of balance… hopefully not. (Just a thought but maybe put witness marks on your old joints and shafts before you take them apart in case you have to put them back in and maintain their relationship to each other for balance purposes)

Drove it on highway (75mph) with new cvs. It actually got rid of a slight harmonic/vibration i had between 65 & 70 mph that started after the bigger eibach springs were put on. So in an initial test drive, its smooth as butta'
Will follow up if anything changes after saturdays trail runs.

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