Cv joint grease

im replacing cv boots on 1970 246. I understand I should use moly grease. My local parts store sells a cv grease that says moly blend’ or moly added. Is this the acceptable grease or is there a percentage of moly I should look for?

 

Grease is not all the same, moly content or not.

I only use Swepco 101 or Redline CV joint grease. Both are easily obtained on Ebay, Amazon etc.

 

CV grease does come in different formulations, not all which can be mixed. So use one, and stay with one in the event you repack in the future. Redline seems to have a following and is readily available and priced fine so that's what I would stick with. It uses a red moly compound rather than a black moly compound, hence is colour. More spec here...https://www.redlineoil.com/cv-2-grease

Some CV joints have more load than others (inners verses outers for example), and there are different greases for different applications. The tradeoff seems to be that some greases will cause the joint to be quieter in motion, while others offer very high load protection. Some OEM's use the low noise grease on the outer and high load on the inners. As they are viewed as "sealed for life", they don't worry about mixing up greases down the road.

All CV greases have moly for high load protection. In higher speed bearing applications, the moly can be too slippery and the bearing roller will not rotate fully and can flat spot over time. So a moly grease is not necessarily a "better" grease, depends on the application.

 

On re-assembly check the CV boot mounting flange / plate is not distorted i.e out of shape, otherwise you will not get a good seal on the new boot, also would recommend using the Oetiker type wide band clamps instead of the original band. If you are stripping down the CV joint make sure each ball bearing fits into the same part of the cage. Most of the boots come complete with the correct amount of grease needed, from memory I thinks its about 140g

Tony