Just change the whole drive axle and not the CV boot. www.raxles.com is the place. Call them (as no Volvo axles are on their site) and talk to Marty. I recently paid $150 for one for my front driver's side. Labor for the R&R was only $25 (but that was at my very good and very cheap indy mechanic...he said it only took him 20 minutes). That, compared to buying a CV boot kit (maybe $50 from an online parts place) about $100 from the dealer and about 1.5-2 hours of labor...so you do the math. I first tried the CV boot replacement, wasting money, as the repair would not make a shake in my steering go away. The axle replacement is a "for sure" fix. I'm totally satisfied with raxles...they have New axles with no rebuilt parts.
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1998 S70 T5 Emarald Green Metallic (125K), 2004 V70 2.5T Ruby Red (45K), Previous Owner of Black '94 850 Turbo Wagon (Sold at 140K and miss her). My cars have been running so well lately they've got me worried.