I have a 2004 Disco II with a Terra Firma lift, custom front shaft, rebuilt rear shaft and flex joint, but I have vibration at 45+ Mph under load as well as no load. If I maintain speed, with no large load I have no vibration. Took it to my driveline guy and seems to think the lift is causing the vibration. I have read somewhere that the engine mounts can be a cause of this type of vibration. Has anyone had experience with this type of issue?
Vibration
- Thread starter Payson
- Start date
That was my first action, replace the mounts..... with a 2.5 3 inch lift, do I need a flex joint to u joint conversion?
I see a lot of people say this, but I've never had an issue with the rotoflex on multiple trucks with true 3" lifts. Both highway driving and challenging off-road use.
I carry a spare rotoflex joint all the time, but I've never needed it.
I ran the rotoflex on my 2.5" lift with no problems for several years.. It wasnt until I went to a 4" lift that I did the Ujoint conversion
Thanks for the responses.... I replaced the flex joint 7,000 miles ago when I rebuilt the rear shaft. I will start with checking the flex joints and then the engine mounts and go from there. Will let you know how it goes...
I prefere a rotoflex coupler too. I think I'm usually over 3inches of lift, but the truck I'm doing now will be a bit shorter. Not much but hopefully enough to run one.
Not on a DII because it has radius arms in the rear. The the driveshaft angle never changes at the diff pinion, so the rotoflex doesn't flex like it would in a D1. I'd rather have a rotoflex because if it fails it is way easier to replace than a u-joint on the side of the road.
Makes sense. I guess I never thought about it cause I would never own one. #series2sucks
I used to be in that camp as well until I started replacing rotos literally after every wheeling trip. Then I switched to a u-joint about 7 or 8 years ago and never looked back. It's highly dependent on how often, and at what level, the truck sees trails. I do love the ease of replacement that a roto offers, I just got tired exercising (and paying for) that ease every weekend.