Gearing Question
Thread Starter
|
Freshman User
Joined: Dec 2004
Posts: 47
Likes: 0
From: Mid Missouri
Gearing Question
Yes I did post this in the other section and so far I have not gotten a reply. But I figured you guys being Bronco owner also would know.
On my 95 Bronco, with a 302, automatic overdrive. Right now I am running 31's but will more then likely change to 32's. So far the only mods are a Flowmaster Delta Flow series 40, 3inch in, 2 1/4 dual outs, a K&N cone filter setup. 3 degree timing advance.
I am needing to know what would be a good axle gear ratio to run, to eliminate my take off boggy's and the down shift on long steep hills. I still want to keep it highway drivable. Right now it runs about 1700 rpm at 70 mph. So I know I have some room to play here.
Any help would be great, thanks in advance
On my 95 Bronco, with a 302, automatic overdrive. Right now I am running 31's but will more then likely change to 32's. So far the only mods are a Flowmaster Delta Flow series 40, 3inch in, 2 1/4 dual outs, a K&N cone filter setup. 3 degree timing advance.
I am needing to know what would be a good axle gear ratio to run, to eliminate my take off boggy's and the down shift on long steep hills. I still want to keep it highway drivable. Right now it runs about 1700 rpm at 70 mph. So I know I have some room to play here.
Any help would be great, thanks in advance
Posting Guru
Joined: Jan 2003
Posts: 1,388
Likes: 0
From: SE Texas
My question would be what is your current gear ratio? If it is 3.55, you would prolly have to go to the 4.10's to notice any difference. That ratio would be good for towing as well. If you want more highway usage, consider keeping the stock gearing and running a shift kit in the tranny.
Thread Starter
|
Freshman User
Joined: Dec 2004
Posts: 47
Likes: 0
From: Mid Missouri
My current gears are 3.55's. I would want it to be a combo of both highway ussage and towing. I am thinking about going to the 4.10 with a light shift kit. Maybe add a good cam later on also.
Postmaster
Joined: Dec 2002
Posts: 3,959
Likes: 9
From: USA
I would second the recommendation for 4.10 ratio gears.
3.91 gears would just about be an exact ratio correction from 3.55 gears for the increased 32" tire size.
32 / 29 = 1.103.
3.55 x 1.103 = 3.917
3.91 is not a common ratio though and may not be available for your axles. 4.10 is available and will yeild slightly more torque and slightly higher rpms than the 3.91's. In a truck used for off roading and towing, it's best to err toward the lower ratio (higher numerically).
3.91 gears would just about be an exact ratio correction from 3.55 gears for the increased 32" tire size.
32 / 29 = 1.103.
3.55 x 1.103 = 3.917
3.91 is not a common ratio though and may not be available for your axles. 4.10 is available and will yeild slightly more torque and slightly higher rpms than the 3.91's. In a truck used for off roading and towing, it's best to err toward the lower ratio (higher numerically).
Thread
Thread Starter
Forum
Replies
Last Post
B-Rad88
1994.5 - 1997 7.3L Power Stroke Diesel
34
Jan 15, 2017 12:55 PM
Krisverde
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
4
Aug 19, 2015 01:06 AM
