Dismiss Notice



Register Today It's free! This box will disappear once registered!

91 Vibration problems

Discussion in 'Modified 1991-1994 Explorers' started by 91Rustbucket, September 30, 2018.

^^Searches ExplorerForum.com^^
  1. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    The Blue Beast, formerly the rust bucket, has a new vibration problem.

    91 Explorer 4.0 4WD

    The problem: At any speed above 25ish I get a nice "VVVVUUURRRTTTT VVVVUUURRRTTT" vibration that I can both hear and feel. It goes in time with the vehicle speed, increasing almost to a steady humm at 60ish. I can feel it through the peddles and through the floor (I pulled the carpet and padding out awhile ago), and the passenger says that can feel it on their side as well.

    What's changed: About 8 months ago I did a skyjacker suspension lift 2" and changed out the sway bars to a beefier option (changing back to stock soon I'm not fond of them). Then 3 weeks ago I installed 32" tires on steel wheels. About a week and a half later the vibration started.

    What I've tried: I took the tires in and had them re-balanced (I knew the first place probably did a crap job) and they were wicked out of balance 2.75 on one tire, but that didn't change anything. I lubed up all of my fittings in the front, replaced the u-joints on the rear drive shaft, and checked my transmission fluid level (I'm getting desperate).

    The Blue Beast.jpg
     
  2. Support EF

    Join the Elite Explorers for $20

    Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.
  3. jmdirk

    jmdirk Active Member

    Joined:
    July 22, 2004
    Messages:
    238
    Likes Received:
    11
    Trophy Points:
    28
    City, State:
    Ottawa, Canada
    Year, Model & Trim Level:
    '93
    Is it more or less noticeable while coasting or under power? If there's a difference, good chance it's driveline related. Could also be related to wheel alignment. If the caster is out of spec it can cause vibration in the front end. The TTB is notoriously hard to align, especially when lifted. And with these you can't set camber independent of caster - it's kind of getting both as close to spec as possible. when you replaced the u-joints do you install the driveshaft in proper phase?
     
  4. roscoe 0202

    roscoe 0202 Elite Explorer

    Joined:
    February 3, 2014
    Messages:
    341
    Likes Received:
    72
    Trophy Points:
    38
    City, State:
    salt lake city utah
    Year, Model & Trim Level:
    1999 explorer sport
    put the transmission in neutral and climb under and see if you can the flange on the transfer case and rear end up and down or sideways could be a bearing in either
    roscoe
     
  5. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    Thank you so much for replying, I've been running out of ideas. I would say that it's a little worse under coast vs. under power, but to be honest that could be just me noticing it because the engine has quieted. When you refer to proper phase do you mean putting it back in with the alignment marks? I am planning on having it re-aligned after I do ball joints and wheel bearings this weekend.
     
  6. jmdirk

    jmdirk Active Member

    Joined:
    July 22, 2004
    Messages:
    238
    Likes Received:
    11
    Trophy Points:
    28
    City, State:
    Ottawa, Canada
    Year, Model & Trim Level:
    '93
    Based on that any your original post, I'd say it sounds driveline related. Somewhere between the transmission and the rear end. Drive shaft phase is that because these have a 2 piece drive shaft, if you separate the slip joint in the middle, you have to make sure that the ears on the yokes on either end are aligned when you put it back together. If you didn't take that apart, it's probably not that.

    It does sound kind of like a U-joint, but you said you replaced those already. U joints will get progressively worse until it fails and you spit the driveshaft out from under the truck going doing the highway at 60 mph :eek:

    The skyjacker lift in the back is what? Lift blocks? Shackles? Leafs? Did you have to undo the U bolts on the rear axle? Could be that they aren't tight enough and you're getting some axle wrap
     
    • Like Like x 1
  7. KurtECV

    KurtECV Surrender The Booty Elite Explorer

    Joined:
    November 1, 2017
    Messages:
    343
    Likes Received:
    148
    Trophy Points:
    43
    City, State:
    Lebanon MO
    Year, Model & Trim Level:
    93 Sport
    94 sport
    Feeling it in the seat and pedals sounds like rear half of the truck. If you could feel It in the steering wheel it would most likely in the front and.

    Have you checked and retorqued All your suspension componants after the lift?
     
    • Like Like x 2
  8. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    Also check pinion angle. 2" lift shouldn't change it but it may not have been correct to begin with. The pinion needs to be parallel to the output shaft of the transfer case. You can get leaf spring shims to adjust the angle.

    Where in Washington?
     
  9. roscoe 0202

    roscoe 0202 Elite Explorer

    Joined:
    February 3, 2014
    Messages:
    341
    Likes Received:
    72
    Trophy Points:
    38
    City, State:
    salt lake city utah
    Year, Model & Trim Level:
    1999 explorer sport
    pinion angle isn't as critical with double cardan joint
    roscoe
     
  10. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    First gen's don't have double cardan rear drive shafts
     
    • Like Like x 1
  11. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    Tearing apart the front end and I found my culprit, a bad wheel bearing. I was doing everything back to the ball joints. But I couldn't manage to get the passenger spindle axle out, I got stuck at the step where you knock it around with a hammer. While the driver's side came out alright, I gave up after 3 hours of knocking it around. Has anyone else had this problem?

    20181006_110909.jpg
     
  12. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    The passenger side inner shaft is held into the diff by a 'C' clip inside the diff. You have to pull the diff off the beam to get to it. Once it is removed there are several 'C' clip eliminator solutions. Just search for that on the forum.

    Unless you're talking about the spindle bearing? I have destroyed several during the replacement process.
     
  13. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    I'm talking about the outer bit that's held on by those 5 nuts, the Haynes says some persuasion with a rubber mallet will set it free, but I beat it on and off for 3 hours in all directions and got nowhere with it download_20181008_170020.jpg
     
  14. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    That's the spindle. Put a nut on the outer threaded part (so you don't bugger up the threads) and tap/hit on it from all angles. The spindle bearing on the back side might be seized to the axle stub shaft meaning you will have to try to pry out the outer axle stub shaft with the spindle. The Spindle has a very close tolerance fit. a lot of vehicle weight is on it.
     
    • Like Like x 1
  15. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    Where in Washington are you?
     
  16. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    Southwest Coastal Washington, by the river. Maybe there is some pry trick I don't know without messing up the shaft seal, cause I pryed it quite a bit too.
     
  17. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    No place to pry. Thread the bearing nut on and tap it all the way around many revolutions. It won't move much. Heat might help a little.

    'By the River' is that Long Beach/Ilwaco, West Port, Ocean Shores?
     
  18. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    If it still won't budge, put the rotor back on and bolt up a wheel to get more leverage.
     
    • Thanks Thanks x 1
  19. 91Rustbucket

    91Rustbucket New Member

    Joined:
    November 15, 2017
    Messages:
    29
    Likes Received:
    10
    Trophy Points:
    3
    City, State:
    Washington
    Year, Model & Trim Level:
    1991 Explorer XLT
    Long beach, and thanks, I will have to try that wheel trick. I hadn't thought of that
     
    • Like Like x 1
  20. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    I know the aera well. I was born in Ilwaco. You may have to use something harder than a rubber mallet, thats why i suggest putting the bearing nut on.
     
  21. Albino 94LTD

    Albino 94LTD Recovering from Moab 2016 Elite Explorer

    Joined:
    June 24, 2003
    Messages:
    3,878
    Media:
    1
    Likes Received:
    83
    Trophy Points:
    68
    City, State:
    Newcastle Wa
    Year, Model & Trim Level:
    White 94 Limited
    Callsign:
    KG7PKQ
    Wait, did you remove the ABS sensor and protection block? That may be holding it on. One of those little bolts is like 6.5MM. A weird size.
     






We Support Our Troops!