Quote:
Originally Posted by kkaleher
I was also running the 3.9 j30 diff and wasn't a fan of cruising at 70mph in 6th at 3kish rpms. I swapped in the 97-01 q45 3.6 now its at 75-80mph at 3k in 6th and 1st gear is much easier to deal with.
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I'm picking up a KA-T car with a cd009 but has a stock 4.08 rear end. What's the preferred or best diff to match this transmission? J30, Q45 or Z33? It'll be a daily driver with occasional sprinted mountain drives and highway runs. I can pick up a Z33 for $100 at the moment but worried about axle fitment... any suggestions would be greatly appreciated. Tons of good info in here! The speedo isn't working at the moment but I believe I've nailed that portion reading through all these pages!