[Rory McNeil]

Not sure if you have a lube issue, but I have a Dana 60 in my low 10-high 9 second 4 speed bracket car, and have used 3 different ratio Richmond Pro gears (4.56, 4.88, and currently 5.13s), since I converted the car to a 4 speed over 20 years ago. I use Redline Heavy Shockproof gear oil, and although I haven`t had the cover of the rear since I changed to the 5.13s about 5 years ago, I can say the other 2 gearsets still look great great after 7-8 years on each set. Now my cars about 500 pounds lighter, but over 20 years of 6000-6600 RPM clutch drops and zero gear issues makes me a believer in the Shockproof oils.