tko 600 or t56 swap and whats involved?

did alot of looking when I bought my transmission and wound up buying a vipert56. I bought it because it was rated for 660FT# and had a .50 6th gear. The other t56 you see advertised in summit are only rated for around 400 horse and have a final gear that is close to a t5 no real drop in rpms in overdrive. I ran my t56 with 4.10 gears when its NA but i swap to a 3.27 when I have my turbo on so it makes my 6th gear kind of a waste. I could have run the tko600, but I didn't know at the time I would be running a 3.27 gear with my turbo. I like the tko600. some people say they are notchy to shift, but they are not bad. Either way you will need a 26 spline clutch for either one. I paid about 4000.00 bucks by the time I got my D&D viperspec in the car. kit,new clutch, changing the exhaust to fit, pro 5.0 shifter for it... My buddy got a used tko600 with everything he need to put it in for 1500.00 I have come across a few that are being sold for around that. Other wise I had sold my tremec 3550 as a kit with every thing bellhousing, clutch, drive shaft, shifter pro 5.0, crossmember for $1000.00 when I swaped and have seen 3550s for around that price in the classifieds.

Cost for a TKO 600 setup is going to be like $3000 if you go new, you need a new clutch, the trans, driveshaft yoke, and a bellhousing. I got an entire setup new a few years back from somebody that had to sell for 2 grand, but prices have escalated since then.

I can live with the notchyness, what i don't like is the 600's gear ratio's.
Hopefully now that i have some more hp on the way, the long first gear won't bother me anymore, even with 3.73's first gear feels like forever.
Gas mileage is comparable to a t56, because of the .64 overdrive.

For lower hp setups, i honestly think the ratios in the tko500 would be more fun on the street.

have you given any thought to a G force or aero A-5?

I was in the same boat too and torn between a TKO 5/600 and a T56. I went with the TKO600 because I really didn't like the short first and second of the tko500 which is similar to the T5 in gearing. I also went with the 600 over the t56 because I really couldn't justify the cost for the .8 5th gear. Cool factor is definately a plus but the viper spec was way out of budget... as was the tko600 but moreso. The 600 is also a boltin with just the modification to the crossmember. I went with the HPM crossmember for 100 bucks which made it even that much easier since it is made specifically for that application. Definately need some gears though... I drove with the stock rear 2.87 and it was a dog. 3.55 is a minimum depending on your power levels... idealy 3.73 i would say. T56 is definately cool and if I had the cash to do it I would have but I was looking at the non viper spec and for less I got a lot more transmission going with the 600... and it was a bolt in. The T56 takes a little more with the crossmember and speedo.
Kevin

Have a TKO 600 in a branc c cruiser and its awesome. Got the .66 ofd ratio, and with a 373 gear it still runs down the interstate very nicely.