Fair comment Doug although Les does have a 3.7 Roadster. The universal factory manual for the runout Classics makes a distinction for them in that the thinner rear axle oil is recommended. I understand the Plus 4's also have a BTR axle albeit higher numerical ratio and was told at least some came with LSD
. TBH the fact that the Redline is full synthetic likely compensates and you have the advantage of less drag. I will stick with what works for me and continue to recommend it for Roadsters.
