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Thread: ProRock 44 Pinion nut torque and pre-load specs

  1. #1
    Nothing but a Thing NevadaZielmeister's Avatar
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    ProRock 44 Pinion nut torque and pre-load specs

    Heylo,

    So I notice that my front pinion yoke has a bit of play side to side (the pinion itself is fine). I have the Dynatrac ProRock 44 running 5.38 gears which is coupled to a JE Reel 1350. So I need to retighten the pinion nut. Does anyone know what the general range is for the pinion nut torque and also what the pinion torque to rotate?

    Any information would be appreciated.
    Last edited by NevadaZielmeister; 11-27-2017 at 12:42 AM.
    RubySky's Build:
    EVO Double Throw Down Front and Rear suspension with bypass system and EVO Lever
    EVO Extreme High Clearance Long Arm Upgrade
    Dynatrac ProRock 44 Front Axle with Pro Steer Ball Joints, G2 35 Spline Placer Gold Axles, ProGrip Brakes
    Dynatrac ProRock XD60 rear axle, full float with 5.38 gearing
    JE Reel 1350 drive shafts
    EVO Pro-Tek Skid Plate System
    PSC Extreme Duty Cylinder Steering Assist kit
    EVO Rear RockStops with King Air Bumps
    Nitto Trail Grapplers at 37x12.50x17

  2. #2
    Administrator wayoflife's Avatar
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    If your pinion has side to side play, you should be leaking fluid everywhere. Are you?

    On a new install, 160 ft. lbs. of torque is what you would tighten your front pinion nut to. Unless you removed your pinion nut in the past, there should be no reason why it would come loose.

  3. #3
    Meme King WJCO's Avatar
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    Torque it down and hope for the best. You'll need a yoke holder. As far as your question regarding turning resistance, I'm pretty sure it's 22-35 inch pounds for proper spec, but that can only be accurately measured with axles and carrier removed. It's extremely sensitive.
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  4. #4
    Old Timer fiend's Avatar
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    160 ft-lbs for the nut, as Eddie said. The pinion torque to rotate should be 10-20 inch-lbs, but you can’t check it without removing your axle shafts and differential carrier.

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  6. #6
    Nothing but a Thing NevadaZielmeister's Avatar
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    Quote Originally Posted by wayoflife View Post
    If your pinion has side to side play, you should be leaking fluid everywhere. Are you?

    On a new install, 160 ft. lbs. of torque is what you would tighten your front pinion nut to. Unless you removed your pinion nut in the past, there should be no reason why it would come loose.
    There is no fluid leaking. I just noticed the play while I have been trying to locate a clanking sound from somewhere in the front end. I yanked the front driveshaft back and forth and saw the play in the yoke in relation to the pinion shaft. I hope this is only a matter of tightening the pinion nut.

    As for the clank sound, I am going to check the torque on the front wheel spacers, since I cannot find anything else in front after spending about 15 minutes yanking on everything I could think of.

    Quote Originally Posted by WJCO View Post
    Torque it down and hope for the best. You'll need a yoke holder. As far as your question regarding turning resistance, I'm pretty sure it's 22-35 inch pounds for proper spec, but that can only be accurately measured with axles and carrier removed. It's extremely sensitive.
    Yeh, the funny thing, QuicksilverJK and I were testing this, but with wheels on but off the ground since his rig had the transmission out. We were reading about 35 inch pounds on average. With his gearing so close to mine, looks like around 30-35 inch pounds makes sense. And yes, it is very sensitive, in that it was 50 inch pounds to get the stream moving along and then the average above.

    Quote Originally Posted by wayoflife View Post
    Also, do you happen to know if your ProRock 44 was assembled with a crush sleeve eliminator?
    I am not sure and am going to call Dynatrac tomorrow to find out if their build sheet has that information on it. I really did not get a single sheet of paper from ORE when I picked up the vehicle.

    Thank you guys so much! HUGE help!
    RubySky's Build:
    EVO Double Throw Down Front and Rear suspension with bypass system and EVO Lever
    EVO Extreme High Clearance Long Arm Upgrade
    Dynatrac ProRock 44 Front Axle with Pro Steer Ball Joints, G2 35 Spline Placer Gold Axles, ProGrip Brakes
    Dynatrac ProRock XD60 rear axle, full float with 5.38 gearing
    JE Reel 1350 drive shafts
    EVO Pro-Tek Skid Plate System
    PSC Extreme Duty Cylinder Steering Assist kit
    EVO Rear RockStops with King Air Bumps
    Nitto Trail Grapplers at 37x12.50x17

  7. #7
    Administrator wayoflife's Avatar
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    Before you do anything, describe the sound you are hearing. Is it constant, intermittent, only when moving, only when turning??

  8. #8
    Meme King WJCO's Avatar
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    If you're referring to rotational play, that may be completely normal. Can you rock the pinion side to side without rotating it? That is not normal.
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  9. #9
    Nothing but a Thing NevadaZielmeister's Avatar
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    Quote Originally Posted by wayoflife View Post
    Before you do anything, describe the sound you are hearing. Is it constant, intermittent, only when moving, only when turning??
    Only when moving, intermittent, usually with certain bumps and/or road conditions. Kinda a clank and sometimes a rattle/clank. I rarely here it while off-roading. I get it sometimes with turning, sometimes not. I think I know what you were thinking, and I am hopeful it is NOT that problem.
    RubySky's Build:
    EVO Double Throw Down Front and Rear suspension with bypass system and EVO Lever
    EVO Extreme High Clearance Long Arm Upgrade
    Dynatrac ProRock 44 Front Axle with Pro Steer Ball Joints, G2 35 Spline Placer Gold Axles, ProGrip Brakes
    Dynatrac ProRock XD60 rear axle, full float with 5.38 gearing
    JE Reel 1350 drive shafts
    EVO Pro-Tek Skid Plate System
    PSC Extreme Duty Cylinder Steering Assist kit
    EVO Rear RockStops with King Air Bumps
    Nitto Trail Grapplers at 37x12.50x17

  10. #10
    Administrator wayoflife's Avatar
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    Quote Originally Posted by NevadaZielmeister View Post
    Only when moving, intermittent, usually with certain bumps and/or road conditions. Kinda a clank and sometimes a rattle/clank. I rarely here it while off-roading. I get it sometimes with turning, sometimes not. I think I know what you were thinking, and I am hopeful it is NOT that problem.
    If you know what I'm thinking, you're way ahead of me cause I haven't a clue as to what might be going on. Just trying to ask questions to get a better idea of where you should be looking and based on what you're telling me, your pinion is NOT where you should be looking. If it were, the noise you're hearing would be constant when moving.

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