Great input from others experiences.
it seems if you go down the oem rebuild path.... there's 4 things involved. 1) joint condition, 2) spline wear, 3) axle straightness, 4) boot longevity.
Im arrested development of just the 84-87 civic crx's. Conditions are: DD. I don't beat on them. Don't race them. But take 1000-5000 mile road trips. So I get really long joint life staying w oem core axles. And my experience is w this one 1987 car owned since 1993.
where my problem has been is boot life....... my first axle outers went 100k ( original axles installed from the factory). I've rebooted that same set of axles every 38-55k miles since until I removed from service at 260k. That set of axles never clicked, just getting really sloppy w rotional backlash.
I've been using nos Honda boots probably manufactured in the 1990's. I had thought the rotational backlash twisted the boots more and caused premature boot failure. That latest set of boots tore after my joint rebuild ( near new w minimal backlash). So I know my stock of nos boots yields 40k per life cycle
it appears from the posts above, you guys are highlighting which manufacturer possible uses the best boots??? And this might be a major key to axle longevity.
we all know the outer boots fail first on fwd Hondas. I've never had an inner boot fail as I'd replace the inner same time as the outer. The last 2 rebootings, I reused the inner boot and just replaced the outers to see how long the inners will last. So far the inner boots are still going strong.
So I need to find a really good brand of outer boots that will last 100k like the first set did made back in 1987 from the factory
Flat4_5sp and kb58, if you guys are ever able to take a pix or get the manufacture numbers off ur boots, that would be great and post them. This would tell us the brand raxle used only lasts 4 year and the other brand lasts from The Driveshaft Shop. From experience, 1990's manufactured Honda nos boots last and average of 4yrs/ 40-45k today in 2024. But lasted 10 yrs/100k back in 1987.
im going to start looking at modern Hondas built since 2020's and up. See if I can get some of those outer boots to fit my 1980's outer joint. In hopes to get new/fresh material from Honda that can get me back to a 100k/10yr service life like the original 1987 axles did.
appears if you keep with a really good oem core and reboot quickly upon a tear, you can get decades of service life out of them like I did. I larger car, or one raced... I'll assume the joints will wear out much faster do to more stress/strain.
a side comment on the rebuilders... after calling some, they all perked up and told me to send several of my cores to them so they could rebuild the best. After that sunk in, I just decided to do it myself and keep all those parts for future spares. My collection of cores came from junkyards w old, old axle stock sitting since the 1990's. I'd have them text me a pix of the boots and boot bands. I could tell they were original, unmolested Honda factory axles and bought as many as I could. This gives the best source of rebuildable cores. FYI, Honda boots have the part numbers molded into the boot. Easy to see if it came from the factory as a "first pass" core.
last note, I have rotational backlash measurements taken off my axle stock in that link attached earlier. I have a few Honda nos nib axles measure as comparison. I recall a brand new Honda axle is like .7 degrees per shaft. My worn, but usable shafts were like 2.8 degrees. I was targeting 1 degree backlash So you can use this range as a reference when you work on yours to help you understand if it's toast, or need another core
hopefully others can help to id boot brands that last a long time!
having 9 crx's, (5 fully assembled and 4 parted in my storage), I beat many horses to death drilling down on these topics as I plan to drive these cars for the next 30 years. My opinion is very one dimensional.