700r4 RRRRRR's

Dinosport

G-Body Guru
Jul 20, 2015
557
85
28
Ct
#1
i might've asked before but I can't find it. I'm in the middle of swapping in a 700r4 on my small block Malibu. It has 308's in it now but I have access to a set of 373's. I have a 26 inch tire so I'm curious if anybody know what kind of rpm will nine looking at doing about 70 on the highway.
Thanks in advance
 

Dinosport

G-Body Guru
Jul 20, 2015
557
85
28
Ct
#3
Oh yes I forgot about those calcuators, Thanks. So it looks like Id be at roughly 23-2400 at 70. I can live with that. Ill bet it will be fun off the line too with those gears.
 

DRIVEN

Comic Book Super Hero
Apr 25, 2009
4,610
1,587
113
Owyhee County
#4
Its a good compromise. I went from TH200/2.29s to 200-4R/3.42 and had the same freeway cruise RPM with waaay better take off. Felt like a whole different car.
 

Dinosport

G-Body Guru
Jul 20, 2015
557
85
28
Ct
#5
Next thing Ill have to do once the 373's are in is see where speedo reads and find the gear for it to read right or close enough, Thanks
 

84cutspreme

Royal Smart Person
Jun 4, 2009
1,042
35
48
#6
hey just my opinion but i hate the 3.73:1 with my 700. 1st gear is just funky. I actually want to step down. take a look at this article: http://700r4.com/faq/ratiocmp.shtml
 

DRIVEN

Comic Book Super Hero
Apr 25, 2009
4,610
1,587
113
Owyhee County
#7
Valid point. The golden rule is 10:1 compound gearing. For a 700R4 a 3.23 would be ideal. Come to think of it, my brother's car has 3.73s behind a 4L60E and it does seem a bit short legged in first. He has pretty short tires too though.
 

Dinosport

G-Body Guru
Jul 20, 2015
557
85
28
Ct
#8
Well I was originally looking for 342's but I know somebody that has 373's and wants to trade for my 308's. He'll even do the job for free.
They need the 308's for circle track.
 

Dinosport

G-Body Guru
Jul 20, 2015
557
85
28
Ct
#9
So basically what where saying here is that the car under normal driving conditions going to roll off the light and shift pretty quick because of the 373's. probably not making it even through the intersection before it shifts into second
 

Kwik_Cutty88

Moderator
Moderator
Nov 22, 2011
1,034
247
63
Coastal North Carolina
#10
I have a 700R4 in my car. 28" tire, 3.73's. At around 60-65 mph with the converter locked, cruising RPM's are around 2100-2200. I've been very happy with it. At the track the spread from 1st to 2nd is manageable, I run on 26" tires at the track.

 

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