breaking u joints

supraboymk3

supraboymk3

New Member
Sep 29, 2008
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Oakland Ca
Ok guys this has happend to me twice now last night I broke the u joint on the rear end. wtf its not even a few mouths old, I mean sure i was trying to do a burn out and all but still>:naughty: . Im I doing something wrong here or is this something that happends alot when you do things your not suppost to lol. I have a r154 with 1pc steel shaft, Anything would help

thanks all
 
FullNelson

FullNelson

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Sep 17, 2007
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postpics.gif
 
GrimJack

GrimJack

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Dec 31, 1969
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I think he's right, too. For instance, Duane ripped the heads off the flywheel bolts at the 1000hp mark. The U-joints were fine. He shattered a carbon fiber driveshaft at the 700hp mark. The U-joints were fine.

Care to describe how you are doing smoke shows? Are you starting in reverse? And what tires are you using? And did you buy your U-joints from Toyota, or out of the back of a pickup truck selling discounted automotive supplies?
 
bioskyline

bioskyline

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Oct 21, 2010
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powell river bc
ive rarely broken a toyota unjoint, even on a lifted toy 4x4. broke way more axles vs ujoints.

when installing it are all the needle bearings standing up?
 
supraboymk3

supraboymk3

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Sep 29, 2008
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Oakland Ca
sorry for late reply guys but iv been trying to work on this issue, So here is what i did and what i found. I took the Driveline to get it serviced, got new U joints and both front and rear yokes, Took it home put it one, drove the car. There was more noise and vibration than even before wtf, took it back got it check and the driveline guys told me there was play on one of my u joints. They fixed it and today i got the driveline back installed it just now and guess what.... same o same o, lots of vibration coming from the rear area so now i really think that it hast to be my diff right? it dose have alot of play, I mean if i rotate the tires back forth, back forth it clicks hard and everytime i take off or do anything it clicks I know the click is coming from the diff what should I do.

thanks

---------- Post added at 09:44 PM ---------- Previous post was at 09:42 PM ----------
GrimJack;1669722 said:
I think he's right, too. For instance, Duane ripped the heads off the flywheel bolts at the 1000hp mark. The U-joints were fine. He shattered a carbon fiber driveshaft at the 700hp mark. The U-joints were fine.

Care to describe how you are doing smoke shows? Are you starting in reverse? And what tires are you using? And did you buy your U-joints from Toyota, or out of the back of a pickup truck selling discounted automotive supplies?
Click to expand...
No start in reverse just high rev, 265, 18's rear
 
mkiiichip

mkiiichip

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Sep 10, 2007
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There is a reason so many of us stay with a two piece DS. Vibrations. May not be your issue, just some food for thought.
Has it been checked for balance?
 
supraboymk3

supraboymk3

New Member
Sep 29, 2008
99
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Oakland Ca
mkiiichip;1671928 said:
There is a reason so many of us stay with a two piece DS. Vibrations. May not be your issue, just some food for thought.
Has it been checked for balance?
Click to expand...

yes got it back today. checked balanced new u joints new yokes

---------- Post added at 11:43 PM ---------- Previous post was at 11:37 PM ----------

so it still shakes alot just took her for a spin, im just guessing diff, like I said shakes from the rear and makes noise I dont think its the driveline I mean basically everything is new on it besides I dont think this place I took it to would be dumb enought to get it wrong twice.

---------- Post added at 11:47 PM ---------- Previous post was at 11:43 PM ----------
GrimJack;1671958 said:
How high is the RPM when you do this? What kind of tires? Are you sidestepping the clutch, or lifting off - gently or hard?
Click to expand...

4K to 5k ill say just and these are NEXEN tires. 265, 35Z, 18R

---------- Post added at 11:49 PM ---------- Previous post was at 11:47 PM ----------
GrimJack;1671958 said:
How high is the RPM when you do this? What kind of tires? Are you sidestepping the clutch, or lifting off - gently or hard?
Click to expand...

o yes and i would say lift off clutch hard
 
TurboStreetCar

TurboStreetCar

Formerly Nosechunks
Feb 25, 2006
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Long Island, Ny
Take the drive shaft out or put it in neutral, pull the parking brake so the tires dont turn, then twist the pinion back and fourth, there shouldnt be much of any backlash. If it moves more then 1/8 inch thats alot.

If thats excessively loose, It could be why your breaking u-joints. The driveshaft is gaining momentum in that slight amount of play, and then bieng shocked to a stop. The traction and weight of the tires and wheels on one end, and the weight of the flywheel and power of the engine on the other. It could be problem for u-joints but i would hate to see the ring and pinion teeth at that point.

Also look at the driveshaft closely. The u-joints should line up in the same rotation from one end to the other.
 
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