2.5 down to 1.7

[Gajep71]

I went with the 2.5, installed properly, at a reputable shop. I watched the CV joints for about a month with no problems. It's currently at the dealer getting its first service, and they sent me a pic of my split-open boot. I had not inspected it after going off-road the last time, so I'm guessing that's when it occurred.

My question is, has anyone had shaft problems with the 1.7 front lift? I have searched and have not found anyone so far who has had problems with the 1.7 installed. I'll go to 1.7 if it eliminates the problem, but if the problem still exists at 1.7, I might as well leave it where it is.

Thanks

 

[Tenac]

The more I dive deep into this, I think the conclusion is the boot itself being a problem. I have the 2.5 boot doing fine still been 6k miles and off roading A lot even Moab once. So far so good.

 

[derek0343]

For me the issue is not about the lift. It's the factory pinion angel and the meterial of the factory boot.

 

[C-Mack]

Plenty of threads on the driveshaft boot failures around the forum. I’m curious if there is some vendor issues with either the boot material itself or how the driveshaft is assembled?

Could for instance, the boot be installed and clamped onto the shaft too far down the shaft putting the boot under stress/tension before it even gets installed on the vehicle? Couple that with suspension lifts, off-roading, mud/sand stand sticking to the boot, high speed cruising plus the odd pinion and caster angles put more stress on an already stress boot making the whole thing worse?

Maybe a comparison between a recently failed shaft and one that is still in-tact with comparable miles might reveal something? Probably not, but failures at different mileage suggests something must be different about the failed units.

Lots of variables and vehicle usage patterns to consider as well but for sure the pinion being pointed more directly at the transfer case would help immensely if it didn’t screw up caster angles. I’m betting IA will quietly introduce some geometry changes in the front axle before long then all hell will break loose with early adopters wanting a new front axle.

 

[parb]

Wouldn't this be a safety recall at some point?
It's there an nhtsa investigation on this?

 

[C-Mack]

I hope this doesn’t turn into the airline industry “Tombstone Engineering” scenario where it takes some poor soles being injured before action is taken. I’ve had a rear driveshaft u-joint fail before on an older vehicle at speed and it can be quite frighting and cause considerable damage. Fingers crossed IA is looking seriously at this issue as it seems to be a common enough complaint from owners.

 

[avidtest]

My boot failed after 1.7" lift at 13.5K miles (about 1K miles after lift was completed). My assumption is that the boot material had already begun the process of failing though.

 

[Commodore]

My boot failed at 12k miles on stock suspension. The boot is the problem. At this point it really is a consumable item.

 

[Dokatd]

My boot failed at 12k miles on stock suspension. The boot is the problem. At this point it really is a consumable item.

Sadly the boot is not replaceable on the stock joint, but it is on the Terra joint. You just have to catch it before you eat up the joint.

 

[Commodore]

Sadly the boot is not replaceable on the stock joint, but it is on the Terra joint. You just have to catch it before you eat up the joint.

I’ll add this link to a less expensive CV. Don’t know if it is as good as the Terraflex one but I’ll venture it is the same as OEM.

Crown Automotive 68272524FRK

Free Shipping - Crown Automotive 68272524FRK with qualifying orders of $109. Shop CV Joints at Summit Racing.

www.summitracing.com

 

[DaveB]

Wouldn't this be a safety recall at some point?
It's there an nhtsa investigation on this?

Surely it is the responsibility of the company doing the lift install to ensure it works with the factory equipment, or replace that as part of the lift kit??

 

[parb]

Surely it is the responsibility of the company doing the lift install to ensure it works with the factory equipment, or replace that as part of the lift kit??

Sure, but since it happens in stock vehicles too it suggest that the problem is in the design of the boot itself. The lift may accelerate the conditions of the fault, but it appears that it's present in the stock design. How can an lift installer fix a design problem from the factory?

 

[DaveB]

Sure, but since it happens in stock vehicles too it suggest that the problem is in the design of the boot itself. The lift may accelerate the conditions of the fault, but it appears that it's present in the stock design. How can a lift installer fix a design problem from the factory?

It is a common problem that vehicles have an inherent flaw that is corrected by aftermarket manufacturers.
The 70 series Landcruiser has a wider track in the front than the rear.
Toyota has never corrected it but aftermarket conversions have.
If a lift is known to cause/accelerate a problem with the factory boot then it should not be fitted.
Until Ineos fix the problem, if they are going to.
The only issue with that is, if they fix it to work with a 2” lift someone will then try a 2.5” or a 4” and then expect Ineos to make a vehicle to suit.
We have a lot of dual cab utes with snapped chassis just behind the cab.
Owners blame the manufacturers for not making the chassis strong enough.
That could be part of the problem, but in reality the aftermarket is just hanging too much weight out the back