It's not hard at all, but you need the right tools. Don't try taking off the outer joint with a hammer, no matter what anyone else says. It's not worth your time. Do both boots at once.
Pull the whole axle and cut the boots off. I used a hammer and chisel to remove the clamps. Some people drill a hole through them. Then slide the inner cup joint off the tripod bearing. I used a 5 gallon bucket to hold it up. Remove the snap ring retaining the tripod bearing, then pull it off the splines. Clean the whole thing with mild soap/water and shop towels. I've seen some people say don't use brake cleaner, and some that say it's fine. Just get it clean. I also used shop air to blow out the bearings and joint.
Slide the new outer boot down onto the axle shaft to the opposite end to where the smaller diameter section fits into the groove, then clamp it. You need one of two types of boot clamp: the crimp style, or the pull tension style. I had to use both just because each boot came with either type. Inner was from NAPA and outer was from Beck Arnley. Fill the joint/boot with grease and then clamp the larger diameter side of the boot. Now you can flip the axle over and do the inner side.
You'll lose some gear oil pulling the whole axle, so now's the chance to inspect the fluid and top it off afterwards. For my manual gearbox, I had a noise every time I let off the clutch. After topping off with new Redline fluid, the noise went away. I guess it was underfilled to begin with and I wouldn't have known otherwise.
These are the exact tools I used:
Buy ABN CV Boot Clamp Pliers Tool for Ear-Type Clamp Crimping or Removal on VW, Audi, BMW, Mercedes, Honda, Mazda Vehicles: CV Boot Tools - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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IRWIN VISE-GRIP Convertible Snap Ring Pliers, 6-1/2-Inch (2078900) - Retaining Ring Pliers - Amazon.com
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I already had these tools. I paid $40 total for the boots and this was an OEM Honda axle with a torn outer and no clicking/noise from the joint. I wouldn't re-boot something with noise or slop in the joint. It took a couple of hours just because it was the first time I've taken apart the suspension on this car. Just make sure to keep everything clean and wear nitrile gloves to avoid contaminants. Anything else that you introduce can become an abrasive.
Some may ask why not just replace the whole axle. A NAPA axle is $150 for this car and a cheaper Trakmotive or Cardone is $70-80 with shipping. I already know this OEM doesn't cause unbalanced vibrations and I already know it works and fits the hub. I don't have time to dick around with an aftermarket part that might not work out and cause me twice the work. I always try to fix/reuse what I have when I can. I'm set to put at
least 25,000 miles on this car by summer, so I'll update this post later on.