u-joint help .....

Discussion in 'Other Repairs' started by catfisherman369, Mar 11, 2009.

  1. catfisherman369

    catfisherman369 Floyd

    Messages:
    4,944
    State:
    Nashville Il.
    I have a 91 camero rs . Just put in a 700r4 tranny and now it keeps breaking the rear u-joint , broke the first one so i replaced it with heavy duty one . Made it 5 blocks stopped at stop sign and went to take off and broke the new one . I do alot of mechanic work , but this has me stumped . Any ideas ?
     
  2. JimmyJonny

    JimmyJonny Well-Known Member

    Messages:
    4,059
    State:
    sc
    Where is it broke at? The yoke ?
     

  3. smokey869

    smokey869 New Member

    Messages:
    966
    State:
    frederickt
    what trans did you take out of the car ? was it a 7004r or a 3 speed ? check the lengths of both trans old and new id bet new one is longer at the tailshaft, may be out of a truck, thats the only thing i can think of would do that, unless something is binding in the differential
     
  4. catfisherman369

    catfisherman369 Floyd

    Messages:
    4,944
    State:
    Nashville Il.
    The tranny I took out was the same thing 700r4 .

    Its breaking the fingers off the u-joint that mount to the rear end .

    I think I will just change the whole damn thing . I have a 283 with 425 horses and a tci tranny I been thinking of throwing in it ....
     
  5. westvirginiacatfish

    westvirginiacatfish New Member

    Messages:
    511
    State:
    Ronceverte
    I would just go with the 283 and the TCI transmission . In my opinion those 700R4 transmissions are junk. also you check to see if the drive shaft needs balanced.
     
  6. biga

    biga Well-Known Member

    Messages:
    2,112
    State:
    evansville
    nothing wrong with 700r4s.. its how they get used that kills them 1st killer is heat... they need an external cooler.most ungines that run 700s behind them have an operating temp of around 200 degrees and that is at the high end of the range for a 700. 2nd killer is tv/detent cable adjusted wrong... other than that they are great trannys. i can show videos of my malibu with the front weels hanging 2foot in the air running a 700with very minor mods behind a bigblock and i have never had a problem with it . now for the ujoint is it crushing the needle bearings to pieces or just snapping the cross?
     
  7. westvirginiacatfish

    westvirginiacatfish New Member

    Messages:
    511
    State:
    Ronceverte
    you can have the 700r4. I've had two and they both were junk . I 'll stick with my straight drive transmissions. Now in a car they my be a different story don't know never owned a car. Everything I've owned has been 4-wheel drive Chevy's or jeeps. Now as far as your Malibu pulling wheel stands 2-feet off the ground I think that's awesome. I wasnt trying to p!ss anyone off I was just voicing my opinion and trying to offer some advice. P.S. I'll RACE YA!!!! :wink:
     
  8. catfisherman369

    catfisherman369 Floyd

    Messages:
    4,944
    State:
    Nashville Il.
    It is snapping the cross .

    I was hoping to put my 283 back into a nova but finding a nova body is getting tuff around here .
     
  9. biga

    biga Well-Known Member

    Messages:
    2,112
    State:
    evansville
    even in a 4x4 they arent bad as long as they run cool... if you think about it both you have had probably started slipping [from heat] they rarely break hard parts ..
     
  10. westvirginiacatfish

    westvirginiacatfish New Member

    Messages:
    511
    State:
    Ronceverte
    I do haul a lot of wood and the tranny was under alot of stress. I just give up on the automatic tranny. I like a straight drive it's cheaper for me to replace the clutch than have an automatic rebuilt.
     
  11. trnsmsn

    trnsmsn New Member

    Messages:
    1,214
    State:
    Missouri Originally Now I
    Is the long bar that bolts up to the tailshaft housing that goes to the differential in place ?:confused2:
     
  12. cantstopgrandma

    cantstopgrandma New Member

    Messages:
    955
    State:
    MD
    700R4 isn't the best tranny in stock form, but i'm guess your car doing wheelstands doesn't have a stock one. Its a decent tranny, but not the best. My s10 has a 4L60E, which is just an electronic 700R4, and its taken its fair share of abuse....they cant be all bad. Another thing, when hauling or towing heavy objects, dont put it in overdrive. Drop the selector to 3.....overdrive is pretty weak in these trannies. I've found that by dropping it out of overdrive i have more power available without downshifting, and it also adds the breaking effect when slowing down.
     
  13. Mike81

    Mike81 Well-Known Member

    Messages:
    4,211
    State:
    Alabama
    For it to break a new joint in that short of a distance it must have something to do with either the drive shaft length is now too long and putting rearward force on the joint as the suspension works or else the axle is wrapping up to an angle to joint can't handle. Like someone said, is the torque control arm from the rear end to he trans on it?
     
  14. rythymroach

    rythymroach New Member

    Messages:
    465
    State:
    United States
    Worked for years in a big truck spring shop, everytime we seen that occur from an individual putting on in was generally because they drive shaft was 180 degrees off from where it was removed. balance is key with them we were always taught to mark each end with a yellow chalk to insure it was re installed just the way it came from the factory. I would say over a 4 year period I saw half a dozen jobs like that where mostly grain trucks were snappin them after an installation by a farm hand or owner.
    That's just one of them little tricks we learn along the way, does'nt mean you did it wrong, just may not have realized the importance of alignment of the shaft in regards to it's original position.
    Hope this helps ya. if it breaks again try rotating it, may solve the problem!
     
  15. rythymroach

    rythymroach New Member

    Messages:
    465
    State:
    United States
    let me add to this, if you just install a u joint at the rear differential and leave the yoke at the end of the tranny attached that's where the real problem will occur, when reinstalling the u- joint at either end we all tend to twist and turn the drive shaft as we are installing it, when this occurs it creates a serious out of balance problem and all the torque is unleashed on the new u joint causeing dang near immediate failures.
    Just wanted to add that to my post. Always mark the ends of each with an alignment marker on the dif or the trans to be sure you dont spin on end around thus creating the 180 dgree out of balance problem.
    hope this helps rather than confuses ya!
     
  16. catfish kenny

    catfish kenny New Member

    Messages:
    6,064
    State:
    Iowa
    I am out thanks today and as some you all know I am a back yard specialist -ya just taught me some valuable info THANK YOU !
     
  17. slimdaddy

    slimdaddy Well-Known Member

    Messages:
    2,603
    State:
    Nelsonville, Oh
    Name:
    Keith
    i would say there to tight when you drive the cups in and put the clips in you should take a punch and drive the cups back out to the clips but hit it on the cross not the cups its self and that lets them work free if you dont do this and the cups are in to far it binds it up and wont work free and causeing them to break