CV Boot Replacement Guide for the 1995 Polaris Scrambler 400 4X4 4x4 ATV
Shop parts for a 1995 Polaris Scrambler 400 4X4 ATV.
Why CV Boots Fail on a 4WD ATV
The CV boots on the 1995 Polaris Scrambler 400 4X4 protect the constant-velocity joints on both the front and rear axles from the contamination and grease loss that end joint life. On a 4WD machine, both axle sets are driven simultaneously, meaning all four boot positions—inner and outer at each end—flex constantly through suspension travel and steering movement. The boot at the front outer position sees the combined stress of both suspension compression and full steering lock, while the rear boots handle the sustained torque loading of drive under acceleration. Both ends are equally vulnerable to failure.
The two main failure paths are UV-related rubber degradation and physical impact damage. Rubber that ages without replacement eventually hardens at the fold lines, where it flexes most with every suspension stroke, and cracks open. A boot that feels supple in warm weather may split during a cold morning ride when the compound is at its stiffest. On the Scrambler 400 4X4, physical damage from rocks and debris is equally common—the inner boots at the differential ends of both axles sit close to the ground and take direct impacts from trail debris.
As a 4WD machine, the Scrambler 400 4X4 has CV boots on both the front and rear axles. The inspection and replacement procedure is the same at both ends—service all boot positions in the same visit so nothing is left unattended.
Spotting a Failed Boot Early
The clearest sign of a boot failure on the 1995 Polaris Scrambler 400 4X4 is grease on a surface near either axle. The spinning axle distributes CV grease onto the inner wheel face, the rotor, the caliper, or the frame adjacent to the axle—front or rear. CV grease is thick, dark, and adhesive. A clicking or popping noise from the front axle during turns under power, or from the rear axle under acceleration, indicates joint wear has begun and the boot failure is not recent. Either symptom warrants an immediate inspection before more riding.
With the Scrambler 400 4X4 on jack stands and the wheel removed, work each boot by hand while rotating the axle. Look and feel for tears, cracks, clamp gaps, and grease on the boot exterior. The fold lines and both clamp zones are the highest-wear areas. A boot that shows surface crazing or has hardened at the folds is near failure and should be replaced before it opens. Front boot failures on the Scrambler 400 4X4 often show up as noise during parking-lot-speed turns; rear boot failures tend to produce sounds under load during acceleration.
On the Scrambler 400 4X4, both the front and rear axles are driven and both carry CV boots. Check all four boot positions—inner and outer at each end—during the same service session.
Tools and Parts for the Job
For the 1995 Polaris Scrambler 400 4X4 boot replacement, have ready: floor jack and two jack stands; axle nut socket in the correct size for the Scrambler 400 4X4; torque wrench; snap-ring pliers; boot clamp pliers or crimp tool; and shop rags. The CV boot kit for each end must include the replacement boot, both clamp bands, and the correct CV grease. CV joints run at high contact pressures between their precision bearing balls and races, and the molybdenum-based compound in CV grease is what maintains the lubricating film under those conditions. Standard grease formulations don’t provide equivalent protection at those pressures.
Set a drain pan under the axle before starting. Contaminated grease from a torn boot is abrasive and must be completely removed from the joint before new grease goes in. MotoSport.com stocks CV boot kits and axle assemblies for the Scrambler 400 4X4.
Removing the Axle and Old Boot
Raise the 1995 Polaris Scrambler 400 4X4 on jack stands and remove the wheel on the side being serviced. Remove the cotter pin and axle nut. Separate the outboard axle spline from the hub by pushing the shaft inward—use a hub puller if the Scrambler 400 4X4 has a tight spline fit. Release the inboard end by compressing the snap ring at the differential with snap-ring pliers and pulling the axle free. Lay the axle on a clean surface, cut both clamp bands, and slide the damaged boot off. Clean the clamp groove areas on the shaft and differential housing before fitting the new boot.
Checking the CV Joint Condition
With the boot removed from the 1995 Polaris Scrambler 400 4X4, clean old grease from the joint and work it through its full articulation—compression, extension, and full steering rotation. A serviceable joint moves smoothly throughout. Roughness or grinding at any point means bearing wear that repacking won’t correct. Test for play by holding the shaft and pushing the outer housing in non-articulating directions. Any clunking or excess movement on the Scrambler 400 4X4 outside the designed articulation range indicates bearing clearances past their limit—the axle needs replacement rather than a new boot over a worn joint.
Repacking and Installing the New Boot
Clean the CV joint completely on the 1995 Polaris Scrambler 400 4X4—every internal surface free of old grease and contamination—before adding fresh compound. Slide the new boot onto the shaft before reconnecting the joint end. Work the CV grease from the Scrambler 400 4X4’s kit into the joint by hand, filling the bearing pockets and rotating the housing to distribute it evenly. Use the full quantity from the kit. Seat the new boot with both ends in the clamp grooves, crimp both clamps to full engagement, and verify neither rotates with a light tug. MotoSport.com stocks CV boot kits for this ATV.
Reinstallation and Verification
Push the inboard axle end into the differential on the 1995 Polaris Scrambler 400 4X4 until the snap ring seats positively—a hand-pull should confirm it’s locked. Guide the outboard spline into the hub, install the axle nut, and torque to the Scrambler 400 4X4’s specification. Install a new cotter pin or re-stake the nut as appropriate. Reinstall the wheel and torque the lug nuts. Lower the Scrambler 400 4X4 and cycle through full steering and suspension travel to verify the boot clears all surrounding components. A brief test ride through a full-lock turn in each direction confirms the axle is fully seated and the boot is holding.
Related Shopping Categories
Shop CV Joints for a 1995 Polaris Scrambler 400 4X4 ATV.
Shop Axles for a 1995 Polaris Scrambler 400 4X4 ATV.
Shop Lubricants & Solvents for a 1995 Polaris Scrambler 400 4X4 ATV.
Shop Wheel Bearings for a 1995 Polaris Scrambler 400 4X4 ATV.
Shop Skid Plates for a 1995 Polaris Scrambler 400 4X4 ATV.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your ATV's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.