Freeway driveline failure + aftermath

Lavender Steel

New member
Can't say I've been around this forum much since a Landcruiser entered into my life ... but I know we all love a good horror story so here you go:

Got on the interstate headed to work last week and felt a slight vibration at speed. I had just noticed an exhaust leak over the weekend and had parts on the way so I wrote it off as the rusty muffler finally shaking itself to bits. Next day I get back on the highway to work and it's clearly not the muffler - well I've got a big meeting at work and it'll have to wait.. Nope! a few more miles and it gets really bad. Luckily I had already started to merge toward the exit when the big bang happened. Clutch pedal sucked to the floor and the gear lever sunk in my hand. I knew it was bad when I got the shoulder and found my clutch fork 10 ft behind the car.

AZ4Un1V.jpg


Pretty easy to take out when the bellhousing has exploded off the block!
flc5bsL.jpg


Input shaft is toast (bearing retainer too)
nLbOTfg.jpg


One of the bellhousing bolt ears on the block broke off
9hWPFdS.jpg


Inside of the double cardan joint
Z7FMbvc.jpg


Based on what's broke and what isn't, my best guess is the double cardan failed at the ball/centering yoke and bound the rear drive shaft, pulling the back end of the transfer case off center and ripping the bellhousing and input shaft in half. This is the only explanation I can come up with to explain how the DC, input shaft, and bellhousing could fail so catastrophically without any damage to anything else :shrug:

No idea if this has happened to anyone here before, but I'll do my best to write up the rebuild process, if for no other reason than to provide some much needed reference material for the few owners of the 4 cylinder/5 speed 3rd gens :frog:

...more to come
 
Register to hide this ad
Any idea what the root cause was? May be good to post that so others can know what to check or look out for to hopefully avoid this. Glad it turned out the way it did, could have been much worse.
 
If I can ask -- do you grease your driveshaft often or not?

Not - I always thought u-joints were cheap so I'd just replace them if they went bad. You can bet I do from here on out though.

Any idea what the root cause was? May be good to post that so others can know what to check or look out for to hopefully avoid this. Glad it turned out the way it did, could have been much worse.

Pretty sure it was the DC joint. Input shaft failure doesn't explain the driveshaft, a bellhousing explosion could cause the driveshaft to bind but why does a bellhousing blow into pieces? I'll try to tear the DC apart and investigate further

bonus picture of the bellhousing pieces .. about 20% of it is still somewhere on the shoulder of i15
6cz66Ce.jpg
 
I appreciate your honesty in answering the driveshaft lubrication inquiry and wish you the best of luck with the rebuild process.
 
This may be the first of a DC failing on a driveshaft that I have read about, though the lack of grease couldn't have helped.

How many miles on your rig?
 
I believe this is the definition of a catastrophic failure....

Hopefully you can piece it back together. What is your plan for the engine since part of ear broke off, did you at least find the piece? Maybe weld it back on?
 
Not - I always thought u-joints were cheap so I'd just replace them if they went bad.

U-Joints are not replaceable in that DC joint. It's a new shaft from Toyota, a junkyard shaft, or a new custom built one. Makes a grease gun look like a pretty cheap investment.
 
U-Joints are not replaceable in that DC joint. It's a new shaft from Toyota, a junkyard shaft, or a new custom built one. Makes a grease gun look like a pretty cheap investment.

U-joints are replaceable in the DC, and said u-joints can be purchased from High Angle Driveline. I know others were able to source these u-joints from another company, but I can't remember the company.
 
Last edited:
Truck has 255k miles and change. Nothing indicates to me any maintainence was performed on the drive shafts. The ujoints I have removed so far moved freely and without play. I’ll disassemble the DC this weekend.

The noise was noticeable for at least 150 miles and I wrote it off as exhaust. Maybe I’m too used to driving a diesel rattlebox FJ40 or maybe I was just dumb and negligent - I think I’d go with a combination of both.

The current path forward is to swap the trans with a salvage unit with lower miles. Swap the entire rear drive shaft since everything I have read points to the DC being impossible to service. This will be a good opportunity to change out the clutch and rear main seal. Slave cylinder will also need to be rebuilt/replaced.

Welding the broken ear on the block is the only option I can see, unfortunately it’s not easy to get at. With the high mileage on the engine I’m tempted to pull it as well ... but that is a can of worms for later in life when I’m not renting a driveway in the city.

I’ll add some more pictures tonight
 
U-joints are replaceable in the DC, and said u-joints can be purchased from High Angle Driveline. I know others were able to source these u-joints from another company, but I can't remember the company.

Good to know. I have yet to read about anyone successfully doing this but good to know it can be done. Thanks. Any links to anyone who has had luck with it?
 
Make sure you get the right length - most of what you see available will be for a V6 Auto, which is probably a different length than what you need.

V6 auto and 4cyl MT share the same rear drive shaft part number. V6 MT and 4cyl auto have their own part numbers.

EDIT: Forgot to add this only applies to the conventional transfer case 3rd gens. Not sure when they switched over to full time 4x4, 1999?
 
Last edited:
V6 auto and 4cyl MT share the same rear drive shaft part number. V6 MT and 4cyl auto have their own part numbers.

EDIT: Forgot to add this only applies to the conventional transfer case 3rd gens. Not sure when they switched over to full time 4x4, 1999?
'99+ Limiteds and '01/'02 for all 4WDs.

-Charlie
 

Members online

Forum statistics

Threads
278,307
Messages
3,554,056
Members
248,016
Latest member
Advally Service

Trending content

Back
Top