The most notable difference between the input shaft used in the t 56 and the tr 6060 and magnum is the bearing hardware which is much larger in the tr 6060 and magnum. The magnum is shown at left and the t 56 is on the right.
Gm Ls T56 Magnum Race Transmission
T56 vs t56 magnum. Compared to the torque curve of a 2jz with a big single turbo i would assume the t56 magnum would handle it quite well. The tko also handles 600ftlbs vs the 700ftlbs of the magnum. Chances50 new member established member. Tremecs aftermarket upgrade for the t56 the magnum essentially a tr6060 is about 15 inch longer than an f body. Feb 19 2009 location. As you can see the t56magnum gearing is a good bit lower than the v160 so to get v160 style gearing requires a higher rear gear.
Anywhere from 400 430 would mate up perfectly to this transmission. The magnum also shifts better than the tko does. Here is a comparison of the t56 magnum gearing vs the toyota supra getrag v160. I would only go tko 600 if cost was a factor wanted to run old school linkage and didnt really drive on the free way. This is tremecs web page for the transmission t 56 magnum this is an image off the tremec site of a regular t 56 magnum. The original t 56 transmission has been superseded by the current t 56 magnum that offers all the original t 56 features plus the 700 ftlb torque rating.
Tko600 vs t56 magnum discussion in road side pub started by chances50 jun 17 2012. Cd009 i have seen some running 1200whp through it but there is no official number on torque rating for this gearbox. Page 1 of 2 1 2 next jun 17 2012 1. T56 magnum is rated at around 700ftlbs and has been proven behind v8s which put out lots of torque. All input shafts on the magnums are 26 spline. The good news is that since the gto and f body use the same tailhousing you.
Notice the magnums 4th gear is equivalent to the supra 5th gear.