Xnke Posted October 17, 2008 Share Posted October 17, 2008 I'm looking for strength of transmission, and highway fuel economy. Its' possible that I could find a 3.7 or 3.9 diff at the local yard, but it'd probably cost 300-400$. there's only one 280ZX, and two Z31's out there, one of which is a turbo model. Hopefully, it's all still there. Here's the plan 200-220 crank horsepower L28 240SX trans, bellhousing swap, speedo swap 3.545 R180 differential, or 3.7 R160 LSD. The R160 needs new bearings and the LSD was clumsily removed by the PO and has lots of broken off bolts and two stripped out threaded holes. I.E., It's garbage, but I may repair it later on and use it. We'll see. Should put me crusing in 5th at 70mph and 1700RPM or so, if my math is correct. Good for milage, and when you drive 250 Miles to see the lady, gas adds up fast... Quote Link to comment Share on other sites More sharing options...
TrumpetRhapsody Posted October 17, 2008 Share Posted October 17, 2008 What numbers are you using for the sx 5th gear to calculate that? I usually cruise around 2400rpm in 5th with my early sx trans and 3.5 rear. Quote Link to comment Share on other sites More sharing options...
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