WOW !!! WHAT A DIFFERENCE...........
Thread Starter
Racer
Joined: Feb 2001
Posts: 315
Likes: 0
From: Pensacola Florida
WOW !!! WHAT A DIFFERENCE...........
a new rearend can make. I just had the Richmond 3:70 installed in my '77. I had the original 3:08 in my automatic TH350, and was sick of the no power at takeoff. The car feels like I have a new engine.
I have only driven it once since the install, so I'm not quite used to the high RPM's cruising at 70 MPH. My mechanic assures me that going on out of town trips of around 300 miles will NOT hurt the engine!
I'm going to Easley South Carolina next month for the POKER RUN and don't want to have problems!!!!!!!!!!
Thanks for listening.
Larry :seeya
I have only driven it once since the install, so I'm not quite used to the high RPM's cruising at 70 MPH. My mechanic assures me that going on out of town trips of around 300 miles will NOT hurt the engine!
I'm going to Easley South Carolina next month for the POKER RUN and don't want to have problems!!!!!!!!!!
Thanks for listening.
Larry :seeya
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
Re: WOW !!! WHAT A DIFFERENCE........... (vettecor)
If you plan on taking a lot of freeway trips, 700R4 or 2004R is the way to go with that rear gear. Driving in 4th would be like driving in 3rd w/ a 2.59:1 ratio. I have 3.55s in my car, and I must say they probably do make the difference. Not much power in this car, but it sure feels quick.
-Steve
-Steve
Le Mans Master
Joined: Sep 2000
Posts: 6,036
Likes: 2
From: Westfield Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Cruise-In V Veteran
Re: WOW !!! WHAT A DIFFERENCE........... (vettecor)
I drove to from Indiana to Utah about 2+ years ago with my 79 with 3.70 rear gears and original 4-speed tranny. Just last year, I made the return trip. No problems either direction.
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Re: WOW !!! WHAT A DIFFERENCE........... (vettecor)
A performance rear gear ratio can be the best bang for the buck compared to the engine mods required to match. 3.70's are probably the best compromise ratio. I love my 3.90's and will not be freeway driving some more with the O/D installed this year. Enjoy! :cool:
Burning Brakes
Joined: Jul 2000
Posts: 1,067
Likes: 2
From: near VIENNA, AUSTRIA
Re: WOW !!! WHAT A DIFFERENCE........... (SmokedTires)
A performance rear gear ratio can be the best bang for the buck compared to the engine mods required to match. 3.70's are probably the best compromise ratio. I love my 3.90's and will not be freeway driving some more with the O/D installed this year. Enjoy! :cool:
On autobahn it´s not a good thing to run such a high gear with a 350.
RICERS EVERYWHERE!!!!!!
Melting Slicks
Joined: Jul 1999
Posts: 3,030
Likes: 17
From: White Pine / Dandridge TN
Re: WOW !!! WHAT A DIFFERENCE........... (vettecor)
See you at the Poker Run! Oh yea, bring lots of $$$ for all the gas your going to need with those gears. I have 3.55 and burn a tank quite fast.
Regards,
Jim
Regards,
Jim
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Le Mans Master
Joined: Mar 2002
Posts: 7,456
Likes: 2
From: Coming home from Luckenbach Texas
Re: WOW !!! WHAT A DIFFERENCE........... (C3Vettesrock)
I've been curious about which diff gears I have in my '79. I turn about 3250-3300 at 70 mph (normal freeway cruising speed around here :reddevil ). I've been told it's probably 3:73. Does that sound right?
Senior Member since 1492
Joined: Aug 2000
Posts: 87,927
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From: Just because I'm paranoid doesn't mean people aren't out to get me...
St. Jude Donor '09
Re: WOW !!! WHAT A DIFFERENCE........... (page62)
I've been curious about which diff gears I have in my '79. I turn about 3250-3300 at 70 mph (normal freeway cruising speed around here :reddevil ). I've been told it's probably 3:73. Does that sound right?
Len
Tech Contributor
Joined: Aug 1999
Posts: 15,173
Likes: 3,982
From: Connecticut, USA
Re: WOW !!! WHAT A DIFFERENCE........... (vettecor)
I'm interested to hear if you noticed any noise from the Richmond gears? I heard these gear sets are noisey from the factory,but there are a lot of them sold.
Gary
Gary
Melting Slicks
Joined: Aug 2001
Posts: 2,043
Likes: 1
From: Elkhorn WI
Re: WOW !!! WHAT A DIFFERENCE........... (gtr1999)
I'm interested to hear if you noticed any noise from the Richmond gears? I heard these gear sets are noisey from the factory,but there are a lot of them sold.
Gary
Gary
Pro
Joined: Apr 2001
Posts: 591
Likes: 0
From: Morinville Alberta
Re: WOW !!! WHAT A DIFFERENCE........... (page62)
I've been curious about which diff gears I have in my '79. I turn about 3250-3300 at 70 mph (normal freeway cruising speed around here :reddevil ). I've been told it's probably 3:73. Does that sound right?
Example
one rotation of the rear wheel with a 3.55 rear ratio, should trun the driveshaft 3 and 1/2 times approx and 3 3/4 approx for 3.70 and 4 + a bit for 4.11 ratio
any way you get the point.
I hope this helps
