What's in this Barracuda?

I haven't tried that. To be honest I'm not keen on testing the limits of this little 7 1/4 differential. When I was cruising really slow around the neighborhood and I switched it from 2nd to D it really struggled like when you upshift from 1st to 3rd on a stick. I thought switching from 2nd to Drive on an auto, the transmission would select the proper gear..

Those 7 1/4" axles are not very strong... I broke 3 of them in 4 years behind a mild 318 with 9.2 compression, a stock 340 cam, 600 vac secondary carb and dual exhaust on a daily driver....

I went to an 8 3/4" axle after that and never broke that one in over 5 years and 150,000 miles...