1983 CJ7 Gears - Ford Powerstroke Diesel Forum
Off Road Motorsports ATV's, Dirt Bikes, Everything OffRoad

 2Likes
  • 1 Post By mattastic13
  • 1 Post By 2MANYPROJ3CTS
 
LinkBack Thread Tools Display Modes
post #1 of 5 Old 03-23-2018, 12:16 PM Thread Starter
Compression Ignition Addict
 
mattastic13's Avatar
 
Join Date: Oct 2014
Location: Corpus Christi, TX
Posts: 167
Thanks: 35
Thanked 10 Times in 10 Posts
Mentioned: 1 Post(s)
Quoted: 16 Post(s)
Feedback Score: 1 reviews
1983 CJ7 Gears

Alright guys, since this is a much friendlier forum, I figured I'd ask here.

I am rebuilding my 1983 CJ7. It has a 5.0L Ford V8, A T177 Jeep 4spd tranny mated to a Dana 300. It will also have a 14bolt rear end and a Dana 60 front. I'd like to run 40" tires.

I've been looking at 5.38 gears, but don't know if those will be too deep.

Any thoughts?

2012 F250 King Ranch 4x4
Ready Lift 1.5" level kit front/Custom 1" block rear/Fox 2.0s/Nitto Trail Graps 295/65/R20 on stock King Ranch rims No Limit delete pipe with Gearhead tunes on a SCTx4, EGR block off plates
No Limit Stage 2 Intake
Sweet Gipsy Danger Sticker
mattastic13 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 03-23-2018, 02:02 PM
Premium Member
 
lonestarcj7's Avatar
 
Join Date: May 2007
Location: Kingwood, TX
Posts: 89
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 0 reviews
I am running 4.56's with 40's and Dana 60's. I wish I was a closer to 5.38's. I typically turn off the OD running highway speeds just because it boggs the Jeep down. Jeep LJ with 4 speed auto tranny. My guess is you will be fine, especially with the 5.0.

2017 F-350 SRW Platinum Crew Cab FX4 Short Wheel Base
lonestarcj7 is offline  
post #3 of 5 Old 03-29-2018, 10:14 AM
Compression Ignition Addict
 
2MANYPROJ3CTS's Avatar
 
Join Date: Feb 2010
Location: Sneads Ferry NC
Posts: 187
Thanks: 3
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 18 Post(s)
Garage
Feedback Score: 0 reviews
Quote:
Originally Posted by mattastic13 View Post
Alright guys, since this is a much friendlier forum, I figured I'd ask here.

I am rebuilding my 1983 CJ7. It has a 5.0L Ford V8, A T177 Jeep 4spd tranny mated to a Dana 300. It will also have a 14bolt rear end and a Dana 60 front. I'd like to run 40" tires.

I've been looking at 5.38 gears, but don't know if those will be too deep.

Any thoughts?
Check out the grimmjeeper gear ratio calculator. Just google it. it will allow you to compare different gear sets with drivetrain/tire combos. I use it all the time. awesome tool.

T-17X series trans are solid transmissions but in my opinion are geared a little tall & making a differential gear change more desirable. That's why I ditched my T-176 and adapted in the Ford NP435 (wide ratio) to the D300. In doing so, I was able to run tall gears for the highway and have plenty of bottom end for the trails... 71:1. Pretty good for no doubler or 4:1 kit and just some stock junkyard **** I rebuilt and bolted together. This was with 4.10's and 37's. I was only running built Waggy D44's.

I'd think about what your end goal its. Wheeler/DD (mine was) or trailer queen that rarely sees pavement.
I loved being able to stay under 2500 RPMS and go 70mph with no issues and still have great crawling gears.

I'd be looking at 5.13's. you'll have plenty of power to push it without dogging it. You'd be hitting 3000Rpms at 70mph in 4th gear (1:1).
The 2.61:1 reduction of the D300 (stock) without a 4:1 kit would get you about a 51:1 final drive in 1st/ 4Lo.
With a 4:1 kit, your looking at a 78:1 1st gear/4Lo final drive. Pretty good bang for your buck.
4.88's are another option but are going to feel a little tall in the lower gears on the street.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Semper Fi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Daddy's truck- '02 F250/7.3/6spd/4x4/6"lift/35's/Procomp traction bars/K&N intake/4" Banks turbo-back/aftermarket turbo/Hydra
Momma's truck- 01 Excursion/7.3/Auto/4x4/AFE stg 2 intake/walker Big Truck Muffler/BD Thruster II turbo/ TS6 /295x70's/F350 springs
2MANYPROJ3CTS is offline  
The Following User Says Thank You to 2MANYPROJ3CTS For This Useful Post:
mattastic13 (03-29-2018)
Sponsored Links
Advertisement
 
post #4 of 5 Old 03-29-2018, 05:06 PM Thread Starter
Compression Ignition Addict
 
mattastic13's Avatar
 
Join Date: Oct 2014
Location: Corpus Christi, TX
Posts: 167
Thanks: 35
Thanked 10 Times in 10 Posts
Mentioned: 1 Post(s)
Quoted: 16 Post(s)
Feedback Score: 1 reviews
Awesome!

Thanks guys!
2MANYPROJ3CTS likes this.

2012 F250 King Ranch 4x4
Ready Lift 1.5" level kit front/Custom 1" block rear/Fox 2.0s/Nitto Trail Graps 295/65/R20 on stock King Ranch rims No Limit delete pipe with Gearhead tunes on a SCTx4, EGR block off plates
No Limit Stage 2 Intake
Sweet Gipsy Danger Sticker
mattastic13 is offline  
post #5 of 5 Old 03-30-2018, 10:24 AM
Compression Ignition Addict
 
2MANYPROJ3CTS's Avatar
 
Join Date: Feb 2010
Location: Sneads Ferry NC
Posts: 187
Thanks: 3
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 18 Post(s)
Garage
Feedback Score: 0 reviews
no prob brother. I'm super nerdy about old jeeps. Just sold my 86 CJ7 a couple months ago. I miss it bad but we outgrew it. I'll probably go back to an FSJ in the future.
mattastic13 likes this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Semper Fi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Daddy's truck- '02 F250/7.3/6spd/4x4/6"lift/35's/Procomp traction bars/K&N intake/4" Banks turbo-back/aftermarket turbo/Hydra
Momma's truck- 01 Excursion/7.3/Auto/4x4/AFE stg 2 intake/walker Big Truck Muffler/BD Thruster II turbo/ TS6 /295x70's/F350 springs
2MANYPROJ3CTS is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome