Best axle gear ratio for chevy 350, TH350, 33" tires. - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier Great Lakes 4x4 Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old March 13th, 2013, 07:03 AM   #1
rubiconwrangler
JEEP350
 
rubiconwrangler's Avatar
 
Join Date: 09-13-07
Location: Taylor, MI
Posts: 224
iTrader: (4)
Mentioned: 0 Post(s)
Default Best axle gear ratio for chevy 350, TH350, 33" tires.

Its actually in a jeep but I figured id ask it here because of well being a chevy drivetrain.
Those of you running a TH350 or other auto trans without lockup convertor or overdrive, whats your axle gear ratio and how does it do onroad and ocassional offroad?

I have 4.10 now and when running at 70 its at 3,200 to 3,300 rpm.

Im making the truck my daily driver soo i want better on freeway but still want some performance.

Im doing a 8.8 axle swap now and in a few years when my tires wear down (there still like new now) ill probably be going with some 35's.

Soo whats your thoughts on this setup should I go with 3.55 or 3.73
rubiconwrangler is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old March 14th, 2013, 04:57 PM   #2
Iggy
Senior Member
 
Iggy's Avatar
 
Join Date: 01-02-12
Location: Traverse City, MI
Posts: 134
iTrader: (9)
Mentioned: 0 Post(s)
Default

Years ago my brother ran a 327 in a CJ7 with a TH350 and it had 3.42 gears and 33" tires. He used as a daily driver and wheeled it, fuel mileage was good and he never complained about power.
Iggy is offline   Reply With Quote
Old March 14th, 2013, 05:24 PM   #3
joe_jeep
welfare wheeler
 
joe_jeep's Avatar
 
Join Date: 03-03-06
Location: hazel park, mi
Posts: 5,856
iTrader: (37)
Mentioned: 2 Post(s)
Send a message via Yahoo to joe_jeep
Default

3000 rpm 3.55 is 79 mph
3000 rpm 3.73 is 74 mph
2500 rpm 3.55 is 65 mph
2500 rpm 3.73 is 62 mph

probably 3.55 is a good for you in my opinion.
3.23 or 3.42 would be great, but i dont think those are an option in the 8.8
google gear ratio calculator the first one is "grimm jeeper"
you can play with all kinds of number there.
you would like to be between 2500 and 2750 at hiway speed imho.
joe_jeep is offline   Reply With Quote
Old March 16th, 2013, 04:40 AM   #4
rubiconwrangler
JEEP350
 
rubiconwrangler's Avatar
 
Join Date: 09-13-07
Location: Taylor, MI
Posts: 224
iTrader: (4)
Mentioned: 0 Post(s)
Default

Ok thanks.
Im thinking since I have 4.10 now i would be almost pointless to go to 3.73 thats not much of a difference.
soo im thinking im going to go with the 3.55, got the bracket kit in the mail yesterday, now just to cut one out of a truck at the junk yard.
rubiconwrangler is offline   Reply With Quote
Old March 16th, 2013, 09:51 AM   #5
bdd1469
bdd
 
bdd1469's Avatar
 
Join Date: 04-12-10
Location: alto mi
Posts: 2,095
iTrader: (1)
Mentioned: 0 Post(s)
Send a message via Yahoo to bdd1469
Default

Sell your tires, buy some 35s.
Find a 8.8 with 4:10 ( very popular)
done.
Tires are exspensive but very sellable used. I can buy a 4;10 8.8 complete for $89.
bdd1469 is offline   Reply With Quote
Old March 16th, 2013, 02:42 PM   #6
vteckickin
Senior Member
 
Join Date: 12-02-10
Location: lansing mi
Posts: 1,033
iTrader: (1)
Mentioned: 0 Post(s)
Default

^
true
vteckickin is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:48 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.11731 seconds with 40 queries