Thanks J. A.Son. I never liked drive train lash and after few rebuilds due to premature wear on front center shaft and front diff input while rest was absolutely fine I thought maybe cvd boots and graphite grease would help so after some research I found those https://www.fastrax-rc.com/index.php?_route_=fastrax-8th-scale-silicone-cvd-joint-cover, it make wr8 less noisy for sure.
Few years ago I found that shop https://www.shapeways.com/shops/kalle-racing?section=hpi+WR8&sort=
with some nice 3d designs for wr8 but it was expensive after they add all extra costs so I've contacted designer and he agreed with me that it is expensive while designer getting penuts so he put them here https://i.materialise.com/en/shop/designer/mr-uueekend it's cheaper here but you need to spend minimum 30£ so bought two (cheaper than one on shapeways but well I got two cars😁) white print was cheapest so I've decided to painted myself, really good design and quality print, snug fit easy to install, only cutting required is small cut to battery tray that's close to spur gear. Hopefully this mod will extend service intervals. One thing to mention when using cvd boot standard size servo may not fit.