R and P Ratio Question - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 02-25-2002, 08:22 PM Thread Starter
Pog
 
Join Date: May 2001
Posts: 365
Thanks: 0
Thanked 0 Times in 0 Posts
 
R and P Ratio Question

Anyone know the stock ratio for an 88 yj with an auto and one with a 5pd I have heard they are different. Just asking cause I switched to an auto and my rpms have increased in a major way. I used to be at 1200 rpms at 110 km but now I am at like 2400 It is really hurting my bank account it sucks back the petro rather fast I get maybe 9 mpg on a good day. Any suggestions I still have the other rears from the auto jeep maybe a swap would be in order?
THX James


Ride 'N' High
Pog is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 02-25-2002, 08:50 PM
I Might Just Know What I'm Talking About
 
Raduckal's Avatar
 
Join Date: Sep 1999
Location: Owensboro, KY
Posts: 1,905
Thanks: 3
Thanked 4 Times in 4 Posts
 
Re: R and P Ratio Question

I dont think switching to an auto should make that much difference at highway speeds. If so, get bigger tires[img]/wwwthreads_images/icons/smile.gif[/img]

I'm on here so much, I have carpal tunnel reader syndrone.
Raduckal is offline  
post #3 of (permalink) Old 02-26-2002, 07:23 AM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,504
Thanks: 15
Thanked 22 Times in 17 Posts
         
Re: R and P Ratio Question

That's too much difference to be accounted for by just the transmission swap, unless you took out an overdrive transmission and the auto isn't OD. Are you sure it's shifting into its top gear?

I might have been born at night, but it wasn't LAST night.
Jim_Lou is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 02-26-2002, 06:30 PM Thread Starter
Pog
 
Join Date: May 2001
Posts: 365
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: R and P Ratio Question

I went from a 5 sp to a 3sp auto and I can feel it switch into the third gear and it also has a new torque converter and is rebuilt. So the only thing I can think of is the rears????


Ride 'N' High
Pog is offline  
post #5 of (permalink) Old 02-26-2002, 07:43 PM
Keyboard Implanted
 
pontiac58's Avatar
 
Join Date: Jul 2000
Location: southern new jersey
Posts: 2,818
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: R and P Ratio Question

Look at the tags on the front rears. If it was 4cyl 5 speed the gears could be 4;10's. The auto probably has 3;07 gears. 100 points of gears ratio is normally around 1000 rpms. So that is what i am thinking.

Can someone please bring me a hammer my 33's just ate my fender again. Damn i need more lift.
pontiac58 is offline  
post #6 of (permalink) Old 02-27-2002, 07:34 AM
Moderator
 
Jim_Lou's Avatar
 
Join Date: Dec 2001
Location: Belleville, Illinois
Posts: 11,504
Thanks: 15
Thanked 22 Times in 17 Posts
         
Re: R and P Ratio Question

That 5-speed is an overdrive transmission, isn't it?

I might have been born at night, but it wasn't LAST night.
Jim_Lou is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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 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
Trackbacks are On
Pingbacks are On
Refbacks are On

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