Originally Posted by 908ssp
Not the cheapest but the least likely to have vibration problems which is so common with all the other designs. The double universal joint requires precise alignment and if the splines loosen up you'll have vibration. Neither of those things are an issue with the PST for the Mustang. No splines used and only one universal joint the other end has a CV joint which eliminates both problems.
That seems like a simple fix to all the alignment issues. there must have been a good reason for Ford to use a 40+ pound double shaft and not this type of cv setup, maybe it was cost? if its worth fuel economy i'm surprised they didn't go for it.
what are the negatives of the PST part?