TKO600---.64 or .82

427SnakeSC · #1 (**permalink**) 10-04-2006, 03:45 PM

It all depends on what your final drive ratio is. Have a look at the Best/Worst Decision for a SPF, thread.

xlr8or · #2 (**permalink**) 10-04-2006, 04:16 PM

Quote:

Originally Posted by 427SnakeSC

It all depends on what your final drive ratio is.

Ain't that the truth. For a big block car with a 3.31 type final drive TKO600 is a great gear spread on the 1-4 and much better than the 3550. The .82 works great with this combo and is very useful. I couldn't find a .82 when I needed the trans so I settled on the .64 and it's useless except for extended cruise mode.

Tony Aprile · #3 (**permalink**) 10-04-2006, 04:51 PM

I originally had a TKO with a .68 overdrive and the standard 3.73's, I didn't like the useless first gear and the 1000+ rpm drop from 4th to 5th.

I changed trannys to the TKO600 for the close ratio 1-4 and the .82 overdrive but felt if reved a bit too high at highway speeds with the 3.73's, so I went with a 3.27 gear and I feel this combination was a major improvement in driveability

Tony

jwd · #4 (**permalink**) 10-04-2006, 09:44 PM

After talking to everyone who would listen, and test driving/or riding in several cars with different combinations, I went with the TKO 600 w/.82 and 3:25 rear gears. This combination will give a usable first AND fifth gears.

turnpike boy · #5 (**permalink**) 10-05-2006, 04:46 AM

Quote:

Originally Posted by 427SnakeSC

It all depends on what your final drive ratio is.

This is the bottom line.

Went with a 3550 and .68 5th gear....but have 4.09's in the rear. With a 28" tall tire this works out to an equivalent 2.78:1 final drive ratio (in 5th), making for fine cruising on hiways, and dandy performance around town. 4th is good up to about 60 mph (around 3000 rpm).

All depends on your preferences - and on your final drive.

Naumoff · #6 (**permalink**) 10-05-2006, 05:55 AM

Quote:

Originally Posted by 427SnakeSC

It all depends on what your final drive ratio is.

And what engine you are using.
Cruising at 65MPH at 3000rpm is fine for me.

For most with a 4 speed I think a 3.31 and a wide ratio would be a better street trans.
The Close ratio in a parking lot you are on and off the clutch pedal as the 1st gear speed is pretty fast but I can live with it as the acceleration from a stop light is incredible. Long legs and they go all the way up.

I took the car to the 1/4 mile drag strip and made a few passes I was at the traps in 3rd gear at 6000rpm. I shifted but could of finished the 1/4mile in third gear as the engine was still pulling.
Not that this is a drag car.