TKO600 with 3.55 gears (26" tires)

 

3.90's with 28" tires and it brings a tear to my eye

 

TKO 600, 4.10's with 28" tires. 3400 miles later, still lovin' it, but maybe considering 3.55's.

 

3.36 and a 26" tire
TKO 500----3.27 first
That 1-2 shift happens REAL fast

 

You really have to determine how the car is going to be used. If you do ALOT of highway, I suggest 3.31/3.42/3.55. If your mostly around town with the occasional highway run, consider 3.73/3.90/4.11, so you can use 5th.

When I had 3.31's, I HATED it. But, the one time I was on the highway doing 70-80 it was sweet! But otherwise, I needed to be doing 65-70 minimum to use 5th - no good!

Now with 3.90's, I need to get up to 45 and I'm good. Coulda and maybe shoulda went to 4.11's, b/c right now I'm always bouncing back and forth between 4th and 5th. 5th still a tad too tall for the back roads, but I guess that's OK. Highway rpms are about 2100 at 70mph - perfect for me! Dont worry about 1st being too short...its supposed to be short, its first gear!

 

I am very happy with 4.10's and a .082 overdriven 5th gear :thumbsup:

 

.64 overdrive w/ 373's is perfect! Gets you out of the hole well and allows you to cruise at 80 mph at about 2200 rpm with 28" tall tires. If I had to chose anything else, it would be 3.90's.

 

.64 overdrive w/ 373's is perfect! Gets you out of the whole well and allows you to cruise at 80 mph at about 2200 rpm with 28" tall tires. If I had to chose anything else, it would be 3.90's.

sounds good to me :thumbsup: I cant wait to drive mine when its done :hurray:

 

TKO 600 and 3.89s. I had 4.10s, kinda wished I would have stayed that way.

 

TKO600 with 2.73 rear (26" tall tyres)
Trans upgrade preceded rear upgrade -- plan is to go with 3.55's since I run a good chunk of highway at 70+.
That said, my 307 doesn't have any problems launching even with the 2.73's (engine upgrade to follow rear upgrade....)

 

TKO 600 with 4.10s/26 inch tires. The only way to go if you want to drive on the freeway at anything over 2000 RPM.

 

396ci with 3:73. I like it.I could even stand to go to 4:11. At 60 im doing 2100 and at 70 its 2300.Also eveyone needs to check his speedo with a GPS.If you go by the calculation from tremec it will be wrong.The guy I bought my car from had the (what he was told was the right gear) wrong gear in the trans and the speedo was off by 10mph.Im now running a 23 tooth and Im right on.When I go from 26 tires to 28 I will be able to go back down.

 

.If you go by the calculation from tremec it will be wrong.

Really? What the CC5S calculator showed me was DEAD accurate as to what I'm really turning. with my 28" tires and 70 mph its 2100 rpms for me - and I love it!

 

I checked mine by going 60 on the highway and counted to 60 using mile markers. Pretty darn close for me too.

 

i dont know if its just me, but im having a heck of a time getting my new speedo gear in. I still havent got it in and im basically tearing apart my whole dash. So far this is the hardest part of the 700r4 to tko600 install, and its the last thing that i need to do

 

I know my 68 was a breeze, just reached up and threaded it onto the back of the speedo. Took me about 30 seconds... Are 71's different?

 

i guess so... i have to take apart the whole dash just to get to my guages.

 

TKO500 with 3.31 gears. A GREAT combination. Low 1st gear for acceleration and 2000 rpm at 80 mph. I shift into 5th around 50- 55mph.
Ron

 

Thanks guys, guess I'll Keep the 4.10 and rebuild it. Have a lot of fun with that ratio.:yes: Jb

 

Good move - you will be VERY happy.

 

TKO 600 28" tire 4.33 rear gear

 

I have been running the 4.10 for a couple of years. Rear needs to be rebuilt. Thats why I was thinking about going to maybe 3.73 or so. Yes first gear is really low with the 4.10, but is a lot of fun to play with and it still is fun to take long highway trips in.

 

i would like to add my own question to this thread because it is kinda along the same lines. i am wondering what gears to go with in my 71 chevelle. i will be running a 454 out of a 98 suburban with a turbo 400 trans and a 12 bolt rear (non posi) but i want to make it posi... any thoughts or recomendations? thanks in advance

 

I recommend a 3.07 if this a regular driver. If it is a weekend cruiser you could as high as 3.42 possibly. Depends on how much hwy you want to do.