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Discussion Starter · #1 ·
Hello, could someone please advise on repair or replacement of the front axle For the above cab.
Am refurbishing the front end, and so far have;

-Fitted new shocks
-Front wheel bearings
-Powered coated the front strut assembly
-Replaced sway arm bushes

Also planning to replace their control-arm bushes.

One of the CV boots has a small hole, which has allowed grease to fling out.

Question: is it ok to replace the boots if the joints are in good condition, or would a better repair be to replace the entire axle and be done with it ?

Regards Dave
 

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If you don't have vibration already, I'd pull it and inspect. If it looks good, new boot and go. A really small hole that only vented grease out, not dirt in, isn't a worry. These days you have to buy "rebuilt" axles since the Chinese new axles are junk. The rebuilt won't be better than what you have if you don't have problems.
 

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Discussion Starter · #3 ·
Hi Bobsaabit its a small pinhole - that’s a big help thank you, will refurbish when its needed.

It’s a RHD car, the axle on the RH seems to have an extender that goes back to the transmission, will it seperate at that midpoint so axle can be removed for inspection?
 

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Yes, that's called the companion-shaft (although Saab's catalogs use that name in error so ignore the formal part names in parts listings).

Assuming you've done the other work to pull the axle, the axle just slides right out of that inner shaft once you pull the clamp off the rubber boot on the big end. Nothing holds it in except the boot. Once you get under there you will see why... the outer axle needs to slide in and out of the companion shaft as the suspension moves. But it can't slide out completely in operaton because the lower control arm won't let the strut move... and the strut keeps the outer axle from moving out. So it's captive. That makes disassembly easy.

Once you pull the axle, you will need to get the boot off. You need to undo a circlip, pull the tripod bearing off the axle, replace the boot, press tripod back on, replace the clip. I haven't done that part, so someone else may guide you better. Or, buy a rebuilt axle that comes with a new boot already installed. Just be sure to inspect the rebuilt to make sure the tripod bearing has no wear or rust. Quality on them is questionable since they don't actually rebuild them... just clean, reboot, and grease.

Replacing the big end clamp when done is difficult if you don't pull the whole axle because the subframe is in the way... but that's a much bigger job. Some of us have used high quality (nylon, not plastic) 1/4" wide industrial zip ties to substitute for the clamp on reassembly. Easy to do, seems to last. Or you can play with the clamp under there for a couple hours. Been there.

Don't wait too long. Once grit gets in there, you're done and you need that inner piece. Unless you luck out finding a used one, they are $$$ new. Sometimes you can find the entire assembly - outer axle with CV joint and Tripod bearing along with the Companion shaft as a rebuilt unit. But, then you have a larger job to do. Don't be tempted by "new" axle assemblies - they are junk and die in a year.

If you don't have the WIS, download it. It will guide you: WIS and EPC for Windows - SaabCentral Forums
 

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Discussion Starter · #5 ·
Yes, that's called the companion-shaft (although Saab's catalogs use that name in error so ignore the formal part names in parts listings).

Assuming you've done the other work to pull the axle, the axle just slides right out of that inner shaft once you pull the clamp off the rubber boot on the big end. Nothing holds it in except the boot. Once you get under there you will see why... the outer axle needs to slide in and out of the companion shaft as the suspension moves. But it can't slide out completely in operaton because the lower control arm won't let the strut move... and the strut keeps the outer axle from moving out. So it's captive. That makes disassembly easy.

Once you pull the axle, you will need to get the boot off. You need to undo a circlip, pull the tripod bearing off the axle, replace the boot, press tripod back on, replace the clip. I haven't done that part, so someone else may guide you better. Or, buy a rebuilt axle that comes with a new boot already installed. Just be sure to inspect the rebuilt to make sure the tripod bearing has no wear or rust. Quality on them is questionable since they don't actually rebuild them... just clean, reboot, and grease.

Replacing the big end clamp when done is difficult if you don't pull the whole axle because the subframe is in the way... but that's a much bigger job. Some of us have used high quality (nylon, not plastic) 1/4" wide industrial zip ties to substitute for the clamp on reassembly. Easy to do, seems to last. Or you can play with the clamp under there for a couple hours. Been there.

Don't wait too long. Once grit gets in there, you're done and you need that inner piece. Unless you luck out finding a used one, they are $$$ new. Sometimes you can find the entire assembly - outer axle with CV joint and Tripod bearing along with the Companion shaft as a rebuilt unit. But, then you have a larger job to do. Don't be tempted by "new" axle assemblies - they are junk and die in a year.

If you don't have the WIS, download it. It will guide you: WIS and EPC for Windows - SaabCentral Forums
Thanks Bobsaabit, i really appreciate the help, and your time with such a detailed reply.
 
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