[SPF1061]

Originally Posted by Anthony

the tko600 is really like a wide ratio tranny with an overdrive, gear ratio's similar to a wide ratio toploader, but with an overdrive. If you would run a wide ratio toploader, you can run a 3.07 rear ratio, and then in 4th, you would not need an overdrive. With a close ratio toploader,you need to run about a 3.54 rear ratio. I think the toploader is simpler, durable, maybe easier to fix.

If you want a race-like tranny, get a close ratio, either a toploader, richmond 5spd,etc. which have gears spaced about 23% i think. If you want a tranny for economy, i'd just get a wide ratio toploader with a 3.07 rear. Yes, you can get a tko600, but i'd get the 0.82 5th. If you already have the toploader, you can do a gear change.

Any of them will be fine.

Anthony -
I found your post pretty misleading. The TKO600 is NOT NECESSARILY a wide ratio transmission with an OD. It can be had as an overdrive with the .64 or as a road race with a true 5th gear at .82. Simple as that. Shifting issues, torque capacity, blah, blah, blah may all be factors to consider.