D1 vibration help...

[Lsmyth26]

What's up guys, I put a 2' lift on my disco 1 last night and now I am experiencing some pretty bad vibrations around 45-55. It only happens when I'm pressing the gas.

Could it be a strain on the front driveshaft, or is there anything I could have knocked around during the lifting process?

Any help is appreciated... Thanks


Logan

 

[singingcamel]

Pretty vague post, alittle more info may help.

 

[carlosz]

the newest d1 is at least a 98 so youre speaking some 15 yrs of surpension service, althou a 2inch lift is not much, check all your bushings specially panhard rod and do not overlook the front dive shaft u joints.

 

[p m]

What's up guys, I put a 2' lift on my disco 1 last night and now I am experiencing some pretty bad vibrations around 45-55. It only happens when I'm pressing the gas.

Could it be a strain on the front driveshaft, or is there anything I could have knocked around during the lifting process?

While what Carlos said is true, what you are describing is a classic case of driveline vibrations. Fix it, D1 with 2" of lift should not have it.
EDIT - it says 98 in your post.
Pull the front driveshaft first, and without checking and guessing replace both U-joints. As you're at it, check to make sure neither front yoke of the T-case nor front axle's pinion have much play in them.
If vibrations persist, repeat with the rear.

 

[Lsmyth26]

Sorry about that was trying to post at work.

What I got is I put a 2' lift (shocks and springs) on last night, I had stock tires on and put them back on after I got done until I buy new ones. Before the lift everything worked and ran great on the truck, now after the lift I am experiencing vibrations in the front end but only when I am accelerating.

Just wondering if anyone had any idea if it might be the front driveshaft or what?

 

[Mike_Rupp]

Have the ujoints ever been changed? I can't remember if the 98 has a rotoflex, but when a truck is lifted a worn rotoflex will vibrate even if it didn't before the lift.

 

[Lsmyth26]

Awesome thanks for the ideas I figured it was gonna be something with the driveline just wasn't sure what to look into first. I'll check all this out tonight

 

[Jake1996D1]

Have the ujoints ever been changed? I can't remember if the 98 has a rotoflex, but when a truck is lifted a worn rotoflex will vibrate even if it didn't before the lift.

No rotoflex but my bet is on front ujoints as well. Could also be drive line angles if you used a terrafirma HD 2" and dont have any extra weight on the truck. Did one on another d1 that didnt have any armor or bumpers and it yielded around 3" lift.

Dont replace them with cheap Chinese joints or you will be replacing them again soon.

 

[p m]

Dont replace them with cheap Chinese joints or you will be replacing them again soon.

That, unfortunately, is a difficult suggestion to follow. I get whatever Napa sells.

 

[singingcamel]

I would look at the front ball joints ,have someone move the steering back and forth and look for slop, it may be due to tires as well.Did you rotate them.
Grab the front drive shaft and check for play

 

[Lsmyth26]

I'll check and see if there is any play in the driveshaft joints, or wear on them. But will prolly replace them anyways, it still has the original u-joints sober will see. Any recommendations on where I should buy the u-joints?

 

[fishEH]

I'll check and see if there is any play in the driveshaft joints, or wear on them. But will prolly replace them anyways, it still has the original u-joints sober will see. Any recommendations on where I should buy the u-joints?

Some recommend the Neapco from Advanced Auto. Supposedly they're still made in the USA.
What brand springs/shocks did you install? Are you sure you didn't get the front and rear springs reversed(not trying to be an ass, its easy to do)?

 

[Jake1996D1]

That, unfortunately, is a difficult suggestion to follow. I get whatever Napa sells.

I should say dont buy duralast joints or the like. Napa sells Precision which I like and use but I have 1310's on mine and precision makes a ujoint with the fitting in the cap instead of the cross. This is why others prefer the neapcos for the 1300's although I have never seen a land rover break a U-joint at the cross (or T), grease fitting or not.

 

[Lsmyth26]

Like I said everything was driving fine with the truck until I put the lift on so I'm thinking it's the angle making the driveshaft vibrate or some part that's old as hell

 

[Lsmyth26]

Man I'm pretty positive I didn't get them backwards I called roversnorth to verify yesterday that I had them correct. I installed a procomp lift, hopefully those are fine or I will have to do some backtracking

 

[Jake1996D1]

Oooof You should never mentioned pro-comp haha here comes the flames..

You would know if you put them on backwards it would look like your truck was doing a wheelie.. or had hydraulics..

I'm willing to bet your u-joints are wasted. Probably never been greased prior to you buying it. Increasing the pinion angle/working angle was enough to set them off.

As others have said, take front shaft out, lock CDL and go for a spin and see if it's gone. Then since you have it out already replace the ujoints.

Good luck

 

[Lsmyth26]

Haha practically got it brand new for free, I know the flames are coming haha

I'll check it out tonight, thanks guys

 

[p m]

I would look at the front ball joints ,have someone move the steering back and forth and look for slop, it may be due to tires as well.Did you rotate them.
Grab the front drive shaft and check for play

His description matches the symptoms of driveline vibrations to a tee.

Grabbing the front driveshaft while it is in the vehicle and checking for play is not a conclusive testing. A dry and seizing U-joint bearing will not exhibit any play, but will cause the driveshaft to vibrate.

Also, I assume you meant steering joints, or tie rod ends, by ball joints; in proper terms, D1 does not have any ball joints except for the upper A-arm in the rear.

 

[Jake1996D1]

His description matches the symptoms of driveline vibrations to a tee.

Grabbing the front driveshaft while it is in the vehicle and checking for play is not a conclusive testing. A dry and seizing U-joint bearing will not exhibit any play, but will cause the driveshaft to vibrate.

Also, I assume you meant steering joints, or tie rod ends, by ball joints; in proper terms, D1 does not have any ball joints except for the upper A-arm in the rear.

hahaha this is true. I'm betting if you grab onto that drive shaft and check it for play it will clank around like crazy. Plus the only thing that changed with this lift is driveline angles.

 

[Lsmyth26]

Anything particular I need to know about replacing the u-joints? Not trying to sound dumb just don't want any major snags