Quote Originally Posted by Ruckus46gt View Post
yea they "do not require a break in", but will see the same rear end temps as a street driven car but will put more of a beating on the rear. So both rears will see the same temps, one will put way more of a beating on the ring but yet that one doesnt require a break in. Makes a lot of sense. Rear doesnt need a break in drive it normal go to the track you wont have any issues with it
A dedicated drag car is not worried about putting 50,000 miles on the ring and pinion. Second a trailer queen is not going to see the same rear temps as a street car. Drag cars need only an initial run-in since they are driven short distances and heat is not normally a problem with proper lube and backlash allowance.

Driving the car normally to the track is a break in cycle. I am glad to see you see the light.

You do not use synthetics on a new ring and pinion because of the break in requirments.