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#840478 - 10/08/07 10:09 PM Driveline Vibration - Propellor Shaft Assembly?
Honger Offline
Rock Warrior
Registered: 04/28/02
Posts: 664
Loc: Indianapolis, Indiana
Still working on my driveline vibration issue... (see my quoted original post below). Quick question:

If it is the bearing in the double cardan then I have to replace the entire rear propellor shaft don't I? As I'm looking at the FSM it sure looks like the double cardan is not serviceable. All the other u-joints seem to be serviceable by disassembly of the spider bearing. Can anyone confirm? Has anyone done any of this work?

Quote:
I have vibration when I get to the 55 - 65 mph zone. When I'm on the gas it isn't as bad, but when I let off I can really feel the vibration. If I get above 65 it lessens... and when lower than 50 it hs hard to detect.

I'm leaning toward a driveline issue... and after inspecting it seems all the u-joints are snug. I can move the driveline up and down inside the center bearing about a half-inch. Is this bad enough to replace?

Has anyone here replaced their Center Bearing before and found that replacing it fixed problems? I searched the archives and couldn't find any "after replacement" testimonies.

Thanks,
Joel
_________________________
1998 Toyota T100 SR5 ExtraCab 4WD
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#840479 - 10/09/07 02:53 AM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: Honger]
eleet Offline
Mudrunner
Registered: 06/18/05
Posts: 447
Loc: Orange, VA
Did you change the centre bearing?

It's possible that a driveshaft shop would be able to work on the cardan joints. If you price out the Toyota parts, they cost about as much as a down payment on a house.
_________________________
97 T100 4x4
97 328i
95 540i restoration project
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#840480 - 10/09/07 10:46 AM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: eleet]
ErikB Offline

Toyota Moderator
Registered: 02/23/00
Posts: 4160
Loc: Auburn, NorCal
Toyota considers the double cardan joint non-servicable, but driveline shops will service them and NAPA carries the joints to DIY. Its more difficult than a standard u-joint replacement though. This article shows how to disassemble it:

http://www.4x4wire.com/toyota/tech/cvmod

You should be able to tell if it needs work w/o taking it apart though!
_________________________
'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik
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#840481 - 10/09/07 11:54 AM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: ErikB]
Honger Offline
Rock Warrior
Registered: 04/28/02
Posts: 664
Loc: Indianapolis, Indiana
Quote:
Toyota considers the double cardan joint non-servicable, but driveline shops will service them and NAPA carries the joints to DIY. Its more difficult than a standard u-joint replacement though. This article shows how to disassemble it:

http://www.4x4wire.com/toyota/tech/cvmod


Thanks for the pointers... good info.

Quote:
You should be able to tell if it needs work w/o taking it apart though!


How? What exactly am I looking for? I get under the truck (while in park but no parking brake on) and try to wiggle to no avail. The only place there is give is in the center carrier bearing.

When I back up there is a "squeak, squeak, squeak" that is proportional to speed.
_________________________
1998 Toyota T100 SR5 ExtraCab 4WD
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#840482 - 10/09/07 12:42 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: Honger]
tomr98t Offline
Need a Spot
Registered: 10/09/07
Posts: 1
My mechanic recently solved what I was convinced was a driveline vibration/noise on my '98 T. I was absolutely sure the vibration/noise was coming from the left rear wheel. My mechanic has a set of microphones which he attached to various places. Then he put on a set of headphones and drove the truck and operated switches to listen to each microphone. He didn't hear anything unusual in the driveline. For no logical reason, he attached the mics near the front wheels and found the vibration/noise was coming from the left front wheel. There was a ridge of rust on the very outer-most edge of both brake discs, where the brake pads don't contact them. But only the left one was causing the problem. He machined the rotors, replaced the front brake pads and the vibration/noise is gone. Something to think about before you spend big bucks replacing driveline components. Good luck.
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#840483 - 10/09/07 03:04 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: Honger]
ErikB Offline

Toyota Moderator
Registered: 02/23/00
Posts: 4160
Loc: Auburn, NorCal
Quote:

When I back up there is a "squeak, squeak, squeak" that is proportional to speed.


Description sounds like a bad u-joint, but its kinda hard to tell over the interweb. <img src="/forums/images/graemlins/smile.gif" alt="" />

Its much easier to inspect the u-joints and double cardan (aka CV) if you remove the driveshaft. Then you can work each joint back and forth and feel for play and/or resistance. Usually its pretty obvious. About the only thing you can do on the truck is make sure everything is in neutral (no tension in the driveline), and grab each side of each joint and twist back and forth and try to find play. A dry u-joint making a squeak is nearly impossible to find this way, until it wears down so badly that there is play. The needle bearings get pulverized into dust.
_________________________
'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik
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#840484 - 10/09/07 03:23 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: ErikB]
Honger Offline
Rock Warrior
Registered: 04/28/02
Posts: 664
Loc: Indianapolis, Indiana
But if it has gotten to the point of squeaking it needs replacing right? Re greasing it might eliminate the squeak but won't get rid of the driveline vibration I'm assuming.

Joel
_________________________
1998 Toyota T100 SR5 ExtraCab 4WD
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#840485 - 10/09/07 04:18 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: Honger]
ErikB Offline

Toyota Moderator
Registered: 02/23/00
Posts: 4160
Loc: Auburn, NorCal
Yes, most likely. Assuming that is the source of your squeak and/or vibe.
_________________________
'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik
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#840486 - 10/23/07 08:22 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: ErikB]
Honger Offline
Rock Warrior
Registered: 04/28/02
Posts: 664
Loc: Indianapolis, Indiana
Quote:
Description sounds like a bad u-joint, but its kinda hard to tell over the interweb. <img src="/forums/images/graemlins/smile.gif" alt="" />

Its much easier to inspect the u-joints and double cardan (aka CV) if you remove the driveshaft. Then you can work each joint back and forth and feel for play and/or resistance. Usually its pretty obvious. About the only thing you can do on the truck is make sure everything is in neutral (no tension in the driveline), and grab each side of each joint and twist back and forth and try to find play. A dry u-joint making a squeak is nearly impossible to find this way, until it wears down so badly that there is play. The needle bearings get pulverized into dust.


It was indeed a bad u-joint... the one at the rear differential flange. After removing the driveline I found that I couldn't even move that u-joint with my hands. Removed it and found rust, partially-pulverized needle bearings. GREASE YOUR FITTINGS!!!

I replaced the center carrier bearing while I was under there...

I held off on replacing the front flange u-joint (though I had the part). Partially out of impatience, partially out of (if it ain't broke, don't fix it).

Any tips on driveline greasing frequency?
_________________________
1998 Toyota T100 SR5 ExtraCab 4WD
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#840487 - 10/23/07 08:46 PM Re: Driveline Vibration - Propellor Shaft Assembly? [Re: Honger]
kewlynx Offline

Toyota & Classifieds Moderator
Registered: 10/06/02
Posts: 15887
Loc: Fairbanks, Alaska *****
Follow the interval in your owner's manual, or more frequently if you're a mudpuppy.
_________________________
http://www.walkablecommunities.org/

Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote.

**ubi apis- ibi salus**
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