UZZ30-Québec
New Member
- Messages
- 488
- Location
- St-Jean sur Richlieu, Québec, Canada
MY friend has a stock MK3 supra turbo differential. (dunno if it's a 3.9 or 3.73)
What he told me is that if the internals of a MK3 supra Diff and LS400 diff are the same, he could build me a LSD differential for my LS400.
For my work, i bought a closed trailer 5X8' that I haul with my LS.
The problem is that I would like to change the stock 3.9 ratio for a 4.10 or 4.30 so the engine would rev a little more on highway cruises actually I drive with the trailer on the cruise @ 105km/h wich gives about 2100-2200RPM torque locked. Since the UZ doesn't have a lot of torque at these RPM I would like to make it rev a little more so the torque wouldn't lock/unlock/lock/unlock constantly, or downshift for nothing. Also the acceleration would be a little better and effortless for the engine but this point is really not a problem.
The real thing is when you haul it to a Tundra to really understand the difference in low torque between the 1UZ and 2UZ VVT-I. The 2UZ has a LOT more low-end torque. (and top end also! 325lbs/ft VS 260)
So, are the internals swappable? or is there a 4:10 or 4:30 diff I could fit on my LS400?. The LSD option is because Open diff with trailer in winter is not really cool. Open diff on stock LS sucks, i can't imagine with something to haul!. I know Non-turbo manual supras came with a 4:30 gear. 1JZ supra came with 4:10 gears, manuals are 3.9 and 3.73, automatics are 3.9. (i think all A34X-E diffs are 3.9)
What he told me is that if the internals of a MK3 supra Diff and LS400 diff are the same, he could build me a LSD differential for my LS400.
For my work, i bought a closed trailer 5X8' that I haul with my LS.
The problem is that I would like to change the stock 3.9 ratio for a 4.10 or 4.30 so the engine would rev a little more on highway cruises actually I drive with the trailer on the cruise @ 105km/h wich gives about 2100-2200RPM torque locked. Since the UZ doesn't have a lot of torque at these RPM I would like to make it rev a little more so the torque wouldn't lock/unlock/lock/unlock constantly, or downshift for nothing. Also the acceleration would be a little better and effortless for the engine but this point is really not a problem.
The real thing is when you haul it to a Tundra to really understand the difference in low torque between the 1UZ and 2UZ VVT-I. The 2UZ has a LOT more low-end torque. (and top end also! 325lbs/ft VS 260)
So, are the internals swappable? or is there a 4:10 or 4:30 diff I could fit on my LS400?. The LSD option is because Open diff with trailer in winter is not really cool. Open diff on stock LS sucks, i can't imagine with something to haul!. I know Non-turbo manual supras came with a 4:30 gear. 1JZ supra came with 4:10 gears, manuals are 3.9 and 3.73, automatics are 3.9. (i think all A34X-E diffs are 3.9)