A Public service announcement for 4-speed owners

Engine, Trans & Driveline

  1. Ceedawg

    Ceedawg Well-Known Member

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    They repaired mine, thrust surface, it was their crank too. Very nice job but I didn’t know they went through that whole process. Feel even better now. $200 to fix $50 up and back
     
  2. eldubb440

    eldubb440 more miracles than Jesus FBBO Gold Member

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    hold the phone....... if pushing in the clutch moves the crank forward, then pressure would be on the front face of the bearing, not the rear face.....the pics and description show the rear face torn up
     
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    • Richard Cranium

      Richard Cranium FBBO Gold Member FBBO Gold Member

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      Nope, the pressure is on the rear of the bearing. I even had submit in the car press on the clutch with me underneath the car, and the crank pushes forward into the rear face of the thrust bearing.
       
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      • 4mulas

        4mulas Well-Known Member

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        Not quite right. The bearings are stationary in the cap and the block, as the crank moves forward the crank applies pressure to the rearward facing thrust surface.
         
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        • 4mulas

          4mulas Well-Known Member

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          Do you call your wife submit? Lol lol
           
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          • eldubb440

            eldubb440 more miracles than Jesus FBBO Gold Member

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            my bad.... I was still on my first cup of jo, and I knew I was right :jackoff:

            I deserve a red X
             
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            • eldubb440

              eldubb440 more miracles than Jesus FBBO Gold Member

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              second cup of coffee creates clarity :fool:

              I need to get back in my lane and stay there
               
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              • Fran Blacker

                Fran Blacker FBBO Gold Member FBBO Gold Member

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                You can file the oil grooves deeper to add oil to thrust surface. Just don't go to the outer edge and increase oil loss. Need a center main might have an extra but mine are RB/Hemi.
                 
              • mopar 3 B

                mopar 3 B Well-Known Member

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                Anyway that bearing does not spin or is not supposed to. It is cradled in the block and locked in place. Rapid hard acceleration and deceleration continuously will cause the same bearing failure. I have seen the same condition also with cars with automatic transmissions.
                If the clutch in 33,000 miles caused a crank thrust bearing failure, just have to wonder how many clutch release bearing the previous owner went threw. Must have all been Cali rush hour freeway miles. I would also be concerned about differential slop ring and pinion clearances.
                 
              • Richard Cranium

                Richard Cranium FBBO Gold Member FBBO Gold Member

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                I can count on one hand the amount of time's I doled out a red X and this doesn't rise to the occasion. But I'll be watching you.

                tenor.gif
                 
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                • Richard Cranium

                  Richard Cranium FBBO Gold Member FBBO Gold Member

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                  As I said in my initial post, I would tend to believe that it was most likely caused by over-cranking an engine that has sat for long periods of time with the clutch depressed.
                   
                • Michael_

                  Michael_ FBBO Gold Member FBBO Gold Member

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                  I dunno why one would want to press the clutch on cranking? Especially if this is taking longer...
                   
                • zyzzyx

                  zyzzyx FBBO Gold Member FBBO Gold Member

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                  I noticed that you're not using a 360 degree grooved main bearing set. The rods only get oil
                  when the cross-drilled holes are in the grooved area of the bearings. No oil for 180 degrees!
                   
                • Cranky

                  Cranky Banned Staff Member FBBO Gold Member

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                  Don't know if anyone mentioned this before sticking the trans in neutral while sitting at a light is a good idea too....heck, I even do that with slush boxes.
                   
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                  • Richard Cranium

                    Richard Cranium FBBO Gold Member FBBO Gold Member

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                    That was the factory bearing.
                     
                  • mopar 3 B

                    mopar 3 B Well-Known Member

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                    Factory bearing and perfectly fine for its intended use.
                     
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                    • mopar 3 B

                      mopar 3 B Well-Known Member

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                      Things called safety switches and idiots that could not take their vehicles out of gear would be the only reason I can think of. If the government had their way it would have been mandatory that one be seated and your seat belt fastened also. Something if I remember correctly almost happened with 74 model year vehicles.
                       
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                      • Charger Dana

                        Charger Dana Well-Known Member

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                        Once.
                         
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                        • Cranky

                          Cranky Banned Staff Member FBBO Gold Member

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                          Haven't drove a new stick vehicle in a long time but you have to press the brake pedal before the starter will engage with an automatic. Do you have to depress the clutch and the brake on the new stick shift junk before the engine will start??
                           
                        • Richard Cranium

                          Richard Cranium FBBO Gold Member FBBO Gold Member

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                          Yes.
                           
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