Shudder form Rear Axle??

3655 Views 9 Replies 3 Participants Last post by TROOPY, Sep 7, 2003

TROOPY

Discussion Starter · Sep 3, 2003

:? Well the beast is a 89 Trooper with the problematic 2.6l motor. I had the motor replaced with a "new" 'remanufactured" longblock about a year ago and recently the head gasket went bad and I had that fixed last week.
Now the motor is strong again and I have driven it to work the past couple of days and I noticed a shudder! This shudder happens when I go up on an incline (hill) in 3,4 or 5th gear, this can happen at 3k rpm and up and at speeds from 30ish MPH to 60 MPH. I have been reading the posts about this problem but I dont think I have a LSD (REAR) in my model, Its a mnual 5speed. Last night I put Castrol Gear Oil in 80/90 made for LSD but it still presists today. The shudder will get worse with more acceleration applied but goes away when you let off of the gas or put the cluth in. Is there anything else that could cause this type of vibration? It seems like the engine is having a hard time transfrering power out of the rear wheels when it happens?? Any help with this kunundrum would be helpfull. I dont realy drive the truck that often but its great in the snow and for taking my 2 dogs to the park. Please help !!!!
:roll: Im in Baltimore Maryland. you can email me at [email protected] if you could help... thanks in advance and this board RULES when it comes to TROOPY...
PEACE

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Tad

· #2 · Sep 4, 2003

TROOPY said:
:? Well the beast is a 89 Trooper with the problematic 2.6l motor. I had the motor replaced with a "new" 'remanufactured" longblock about a year ago and recently the head gasket went bad and I had that fixed last week.
Now the motor is strong again and I have driven it to work the past couple of days and I noticed a shudder! This shudder happens when I go up on an incline (hill) in 3,4 or 5th gear, this can happen at 3k rpm and up and at speeds from 30ish MPH to 60 MPH. I have been reading the posts about this problem but I dont think I have a LSD (REAR) in my model, Its a mnual 5speed. Last night I put Castrol Gear Oil in 80/90 made for LSD but it still presists today. The shudder will get worse with more acceleration applied but goes away when you let off of the gas or put the cluth in. Is there anything else that could cause this type of vibration? It seems like the engine is having a hard time transfrering power out of the rear wheels when it happens?? Any help with this kunundrum would be helpfull. I dont realy drive the truck that often but its great in the snow and for taking my 2 dogs to the park. Please help !!!!
:roll: Im in Baltimore Maryland. you can email me at [email protected] if you could help... thanks in advance and this board RULES when it comes to TROOPY...
PEACE

Have you checked the carier bearing in the rear driveshaft? It is the rubber thing that supports the rear driveshaft half way between the transmission and the rear axle. Grab the shaft and try to push it up and pull it down. It should move a little, but not clunk into the crossmember that it passes through.

It is right where the driveshaft passes through this crossmember:

Also check the u-bolts that hold the axle to the leaf springs, and the leaf spring bushings. Something could be loose and causing the axle to vibrate. On the same line, check the engine/transmission mounts. Could it be the clutch slipping?

-Tad

-Tad

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TROOPY

Discussion Starter · #3 · Sep 4, 2003

Ill check that stuff out, It isnt the clutch, Im positive on that, its new from when the new motor went in. I appriceate your help, Ill let you know what I find when I crawl back under her after work.
PEACE
(thanks for the pic too :lol: )

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TROOPY

Discussion Starter · #4 · Sep 4, 2003

:lol:
Looks like my "carrier bering" hasd a crack in the rubber arround it, It moves considerable but no cland (i dont hear a clank with the shudder at hgighway speeds) Is this a hard to repace? How much do you think a shop would charge for this? Thanks for the pointer Tad!!! YOU RULE!!!!!!!
Ill let you know if this fixes the vibration/shudder after I A.) Do it myself
or B.) Pay my shop to do it.
Once again THANK YOU!!

PEACE

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rubo

· #5 · Sep 5, 2003

I think it's the right time to go to one peace driveshaft.
No more problems with that frigin bearring.
I think there is a place on the web you can get the bearring for about $70, but i think you will need to have a shop change it for you & it will run you at least another $100.
You can get an OPD made from around $100 to $200 (depends where you leave & the shop that you would go to).

Just my &.02

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TROOPY

Discussion Starter · #6 · Sep 5, 2003

found the bearing for 56 bucks at a local dealer (in stock) & this thng has never been chaged. Its the whole unit "bolt on" I think I can handle the install in my garage as long as I get out my air rachet. Has anyone replaced this part? & do they have any tips or tricks to make the job go more smoothly? I dont mind the 2 pc driveshaft (it gives awee bit more clearance I thnk :roll: ) Well anyhoo if you have any tips lemme know
PEACE

Keep on Troopin'

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Tad

· #7 · Sep 5, 2003

My advice, take it to be replaced. The new bearing is pressed onto the shaft, after you press the old one off. You might be able to do it at home, but I bought the bearing, then gave up and took the truck in.

-Tad

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TROOPY

Discussion Starter · #8 · Sep 5, 2003

:x Dealer wants $450 Bucks to install a carrier Bearing! Needless to say I will be attempting this on my own at these prices. I will take the shaft (not from the dealer) to a shop and have them press it in if needed. I think I can get a puller from pepboys to take the bad setup off the shaft if this is the case & maybe I can have them pull the thing off if I cant do it myself. I would rather pay 60 bucks for the part and struggle to do it myself than pay "flat rate" to a dealer that doesnt even want to cut me some slack on an older trooper. Once again if anyone has any pointers in doing this type of work please let me know. Thanks in advance

PEACE

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rubo

· #9 · Sep 5, 2003

Do you have any lift, or are you planning to get one?
If you do than i still advise you to get OPD.
If you have any lift (or plan to get one), you'll need a new carrier bearring in about 6 months.

Just my $.02

rubo

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TROOPY

Discussion Starter · #10 · Sep 7, 2003

New carrier bearing is in, you would have to be a complete spaz :shock: to not be able to repace one by yourself. Dont let the shops gouge you. It took me and hour and a half to do the whole thing, even with pressing the bearing on the wrong direction at first, pulling it of and turning it arround.The vibration is still there though, :evil: I think I has to do with the motor/tranny.
Whateva! The rubber on my old bearing was toast anyways..... Anyone out theree have probs with vibration /sputtering at 3K rpm in 3rd 4th of 5th? I guess I shhhhhould post a new topic.

PEACE

:lol: :lol: :lol: :lol: :lol: :lol:

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