from 3.73 to 3.23?

[Loa]

Hello,

Last fall I bought a 73 Challenger with a 340 and automatic transmission. The previous owner put a 3.73 in the rear.

Would going from that 3.73 back to a 3.23 be a *very* significant performance drop? How about fuel consumption?

Thanks

[Chryco Psycho]

Yes it will be significant , you can calculate the RPM change here http://vexer.com/automotive-tools/speed-rpm-calculator
the response will suffer as the E body is relatively heavy & the 340 is not a torque monster but loves RPM but milage will definatly improve the best of both worlds is an OD trans such as the 518

[blown motor]

Can the mods sticky that link somewhere? That's really cool.

[Chryco Psycho]

I thought it was in the archives ?

[Oldschool]

I thought it was in the archives ?

I found it. It is "stickied" in the "Suspension, Wheels/Tires and Brakes" section.

http://www.cuda-challenger.com/cc/index.php?board=18.0

 

[blown motor]

I knew I had seen it before, just couldn't remember where. I do a lot of  . Thanks Oldschool. I'll make a note of where it is and then next time I'll try and remember where the note is ..... if I remember that I made one. Oh boy, this is getting worse 

[72cudamaan]

I knew I had seen it before, just couldn't remember where. I do a lot of  . Thanks Oldschool. I'll make a note of where it is and then next time I'll try and remember where the note is ..... if I remember that I made one. Oh boy, this is getting worse 

What's gonna happen when you get old Murray? 

[Loa]

Hello,

Thanks for that great link, but it's hard to believe there's only a 500 RPM difference between 3.73 and 3.23 at 70mph.

And yes, an OD tranny would be best! Maybe next year's project! 

Loa

[blown motor]

What's gonna happen when you get old Murray? 

I take that to mean you think I'm still young. Thanks Andy!