Best all-around gears ???

[mopar-or-no-car]

I Have 3.55's in my 73 rally with a 340 auto I also have a shift kit in the tranny! I am running stock tires.  I feel the 3.55's are great for both street and freeway.  They are great for light to light and in the 80's I use to drive 140 mph on the freeway with no problem! (and I always seemed to win the races on the street!! ) It is also an 8 3/4 rear end and I have a 727 tranny!! just my 

[1 Wild R/T]

I Have 3.55's in my 73 rally with a 340 auto I also have a shift kit in the tranny! I am running stock tires.  I feel the 3.55's are great for both street and freeway.  They are great for light to light and in the 80's I use to drive 140 mph on the freeway with no problem! (and I always seemed to win the races on the street!! ) It is also an 8 3/4 rear end and I have a 727 tranny!! just my 

140 MPH with 3.55 gear & a 27" tire requires 6500+ rpm....You wouldn't drive 140 for long...

[Madmax440]

Thanks for all of the input Guys. I will probably be going with the 3.23 gear, I don't drive 55 mph that much but do so enough. I would prefer to go with the 3.55 so that I don't lose my edge, but am afraid that I will practically be in the same position that I am now if I don't. 

[Jacksboys]

140 MPH with 3.55 gear & a 27" tire requires 6500+ rpm....You wouldn't drive 140 for long...

[mopar-or-no-car]

140 MPH with 3.55 gear & a 27" tire requires 6500+ rpm....You wouldn't drive 140 for long...

REALLY??? I Could swear I Drove all the way down the freeway at 140 mph!!!!!(approx 30 miles) and I know I got home REAL fast!!! AND without a ticket!!

[Oldschool]

What RPM's are you doing on the hiway? I have the 8 3/4 rear, 489 casting, and 3:23 gears. At 60 MPH, I do about 2600 RPM. Not too bad. A shift kit in my tranny allows me to delay my shifting too. 


  Mike

I am running a Dana with 4:10's in it.  I am also turning 2600 @ 60 mph, but I am running 31.5" tall tires.  That makes the 4:10 a little more comfortable on the highway.................       

BTW---- I think 3:55's are great all round gears for the performance enthusiast...............

[1 Wild R/T]

90 mph with 3.55 gear & 27" tire is 4200 rpm's at that speed 30 miles takes around 20 minutes...
120 mph with 3.55 gear & 27" tire is 5600 rpm's at that speed 30 miles takes 15 minutes, assuming the engine stays together...

BTW 150 mph is 7,000 rpm...

[4Cruizn]

I have 3.55's in the hardtop for cruisin' around town and 3.23's in the convert for the highway!  Both gears are sweet!   

[Madmax440]

Will I thought that I had my mind made up - LOL.

[Bullitt-]

I have an Excel spread sheet that is intended to find speedo gear size but could be used to determine what gear ratio you would want, say at a given speed/rpm with different tire sizes, anyone want I will email to you. 

[Moparal]

Can you email it to me? I could use a copy...moparal@   msn .com.

[Bullitt-]

Can you email it to me? I could use a copy...moparal@   msn .com.

on its way, let me know if not received

[r15303]

I'm at that point too.  Please e mail to   mark@kemcor.com
Thanks

[Bullitt-]

I'm at that point too.  Please e mail to   mark@kemcor.com
Thanks

commin at ya

[Chryco Psycho]

I have an Excel spread sheet that is intended to find speedo gear size but could be used to determine what gear ratio you would want, say at a given speed/rpm with different tire sizes, anyone want I will email to you. 

Can you figure out exactly which speedo gear is needed for a 3.55 gear with 28" tall tires ?