DRIVESHAFTSUPERSTORE

World Class Driveshafts

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800-845-6326 602-253-8006 

Customer Service for order status and repairs 888-222-8610

602-253-8208

FAX

602-252-5638

ADDRESS       

2417 WEST Lincoln St Phoenix AZ 85009

 

 

 

 

 

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World Class Driveshafts

SALES and TECH HELP
800-845-6326 602-253-8006 

Customer Service for order status and repairs 888-222-8610

602-253-8208

FAX

602-252-5638

ADDRESS       

2417 WEST Lincoln St Phoenix AZ 85009

 

Trouble Shooting
 

Most Common Symptoms and Solutions

All solutions assume that you have first checked wheels balancing and third member.

A.  Stock Vehicle

These are the more simple to find drive shaft problems since there hasnít been any changes to the frame or suspension.

We make any stock drive shaft for any vehicle. Usually, these drive shafts can be diagnosed by visual inspection and balancing. Many times, we find that the end yokes bolted to the transmission and/or the end yoke bolted to the differential are worn or loose and it is not the drive shaft. Worn end yokes allow the u-joints to have lateral movement that is not allowed in a good drive shaft. Rebuild the drive shaft and balance it.

B.  After Lifting a Vehicle

Some problems are induced into the performance of the vehicles due to the lift, change of engines, transmission, and/or transfer cases, differentials, etc . They are normally symptoms that our customers communicate to us and we learn the solutions by analysis or trial and error depending on the difficulty. Also, the theory of operation teaches us what to expect.

      Click on bullet (black dot) to unfold or collapse the list

  • SYMPTOM: Vibrations at low speed or high speed. U-joint vibrations are felt after 5 degrees and the higher the angle the more pronounce the vibration. The most common symptom after a suspension lift.

    • Solution (s): a) drive shaft may now be too short. B) Due to the lift the angles have increased causing vibrations. To Reduce the angles, a double cardan CV is used. The CV divides the angles in half and the angle at the rear u-joint must zero within three degrees by shimming the pinion with wedges or by adjustable torsion bars. So now the u-joints do not have a large angle to traverse, vibrations are gone and as a bonus, the u-joint life is extended. The knuckle with two u-joints in it is a performance unit used to lower the angle per u-joint thus reducing vibrations to very barable levels.
      Products: See the Wrangler kits, Blazer drive shaft, Tahoe CV front, SYEs. Look at these products and what they can do for you.

  • SYMPTOM: Drive shaft falls out when going over a hole where the wheels flex downward.

    • Solution (s): a) drive shaft is now too short and needs to be lengthened. B) The drive shaft needs longer travel (long yoke, extreme travel splines) so that it does not come apart when the suspension extends. See long yokes and long splines sections.
      Products: Look at our long spline drive shafts and or parts categories..

  • SYMPTOM: Drive shaft bolts up but the standard CV binds. A high angle CV performs the CV function plus allows you to operate at higher angles.

    • Solution (s): When a vehicle is lifted the angles increase at the transfer cases as well as at the pinion yoke.  High angle CVs are used to accommodate these higher angles. The pinion must be shimmed to be a straight line with the drive shaft within 3 degrees. Zero degrees at the pinion and half the angle at the transfer case and guess what! the angles have been reduced without reducing your lift. This is wonderful and vibrations are reduced to give you a smooth ride. 

    • Don't forget the laws of diminishing returns, as the angle increases  beyond the limits of the CV vibrations increase as a function of the angle. The higher the angle the bigger the CV used should be because the higher the angle the lower the torque rating. What we have to do is start with a higher torque rating CV to make up for the torque loss at a higher angle. And so that is why we make big CVs to handle the higher angle. We have done high angle CVs for 15 years and we have build some of our own and you can through anything at us and we probably have a solution.
      Products: See the 5 different types of high angle CVs. Click here for the big ones.

  • SYMPTOM: You have created a monster and no drive shafts fits it due to the high angles created by the lift. These are usually vehicles suspension lifted from 8 to 30 inches. Most vehicle lifted 8 and above inches usually required very custom drive shafts.

    • Solution (s): The Bad Boy CV, the ultimate non-daily driver CV and the other four high angle CVs from Drive Shaft Superstore. The Bad Boy Jr is a  non-daily driver CV or a Competition CV used for high angle and strength.
      Products:  See Super High angle CV category or click here.

  • SYMPTOM: You hear a clicking noise coming from a from under the vehicle or from the CV.

    • Solution (s): This is usually caused by the center  CV bearing. Rebuild CV and replace u-joints. The CV has a center bearing and usually non-greasable from the factory. All DriveshaftSuperstore.com centering assemblies are greasable. Greasable centering assemblies usually have a flat zerk and a special pointed attachment to the grease gun is required.

  • SYMPTOM: The output of the transfer case does not line up with the differential pinion input.

    • Solution(s): 1.Compound angle drive shaft with two CVs drive shaft.  However, the lateral angle must be greater than 3-5 degree to have any effect at highway speeds. So drive it first then decide.  2. Change the third member or the transfer case to align and only have a vertical angle on the drive shaft.

  • SYMPTOM: The truck canít keep a u-joint at the transfer case or at the pinion.

    • Solution(s): 1. You are probably using ďuĒ bolts and are over tightening them. 1310 20 ft-lbs, 1350 25 ft-lbs. maximum. Over tightening u-bolts will crush pin needles in the bearing and the u-joints burns up quickly.  2. the angles are too severe for proper u-joint operation. Extreme motor torque is required to turn a u-joint when a u-joint is lying down 15 degrees or so, as opposed to 5 degrees. So the u-joints and the parts that hold them wear a lot faster than usual. You need a CV in this case so that two u-joints to the job of one and a smooth transition through the angle occurs..

  • SYMPTOM: I have adjusted the angle at the top u-joint and the bottom u-joint to be within 1-2 degrees of each other and I still get vibrations.

    • Solution(s): Theoretically, 5 degrees is the maximum on a single u-joint before it creates noticeable vibrations at high speed. Angles higher than that require a CV for good performance at high speeds. Don't for get the laws of diminishing returns. If you put two people in you garden you may get a fair crop picked. But as you increase the number of people in your garden the harvest begins to diminish as the more and more people arrive and  begin to step or you crop instead of picking it. 

  • SYMPTOM: drive shaft wobbles when it turns.

    • Solution(s): a) check u-joints for excessive movement, B) check all u-joint clips that they are in their grooves, C) check for signs foreign object that may have hit the drive shaft and look for dents, E) have it straighten and balanced. In rare occasions, the output and input shafts of the TC or the Differential may be off center and cause a wobble. 

  • SYMPTOM: the CV ďHĒ yoke or the stud on the ball stud yoke has broken more than once.

    • Solution(s): A). the drive shaft is bottoming out causing the CV to break when pushed back. B) Shorten the tube to give the drive shaft more compression without bottoming out. B) The angle is too excessive for the CV and is over flexing. C) The angle of the CV is excessive and the high power on the vehicle is created a jump rope effect on the ball stud yoke causing the stud to break. And just once in a while, you have u-bolts holding the pinion u-joint and they are being over tightened crushing the pin needles to the journal. The will mess up the CV. 20 ft-lbs 1310 and 25 ft-lbs 1350.

  • SYMPTOM: The vehicle is used strictly for heavy duty rock crawling and I break a lot of CVs and u-joints and bent tubes.

    • Solution(s): a CV is the weak link to a rock crawling drive shaft. Get rid of the CVs; if you canít get enough angle, use larger yokes and u-joints at the transfer case that give you 35 degrees. However, sometimes you need a CV to make the angle, in which case get bigger and stronger CVs that can take more abuse. We make minimum breakage drive shafts with super tubes that wonít bend. See our drive shafts and end yoke upgrade  kits. 

  • SYMPTOM: I need long splines in the rear drive shaft and yet I need to travel at high speeds on the freeway. The extreme travel long splines are too loose of a fit for minimum vibrations at hi-way speeds.

    • Solution(s): A conventional long yoke 1.5 diameter 16 spline that yields 7 inches of working travel or total of  9Ē of spline. These have a tight fit for a vibration free ride.

  • SYMPTOM: When I break at a light or stop sign, and when I let go of the break, I hear a clunk. Itís like something stuck when breaking and letís go when I let the foot off the break.

    • Solution(s): 1.  Temporary fix is that grease be added to the spline so that the yoke doesnít stick. The yoke is sticking. 2. The drive shaft may be to short creating slop on the yoke and allowing it to stick when pushed. 

    • On two piece drive shafts, moisture might have gotten in the mid-ship yoke and spline and it is sticking. That happened on my 02 Super Duty. Take it apart and grease it and make sure the clamps are tight to not let the moisture in.
       

 

ANY UJOINT OF OURS BREAKS IN TWO WE REPLACE IT FREE OF CHARGE