Jeep wrangler 1989 5th gear top speed 55 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-10-2015, 09:17 AM
Thread Starter
  #1
Newb
 
Join Date: Apr 2015
Posts: 10
Jeep wrangler 1989 5th gear top speed 55

Hi Everyone,
I'm new to Jeeps but jumped right in with a 1989 Wrangler. i love this car (my first car).
I have what some have refereed to as a Govern problem. My car will go up to 70 mph in 4th gear but put it in 5th and it 55 mph max.
I need to know how to disconnect this device.
I have read a lot of great posts on this forum, thanks for sharing.
StevieJr

StevieJr is offline   Quote
Old 04-10-2015, 11:06 AM   #2
Jeeper
 
Dave Meyers's Avatar
 
Join Date: Mar 2015
Posts: 260
What size tires do you have?

Dave Meyers is offline   Quote
Old 04-10-2015, 12:30 PM   #3
Supporting Member

WF Supporting Member
 
Tom95YJ's Avatar
 
Join Date: Sep 2013
Location: SLC, Utah
Posts: 2,831
Quote:
Originally Posted by Dave Meyers View Post
What size tires do you have?
this


If you 33 or larger You need to regear. People who never had a properly regeared jeep will never dispute this fact
__________________
1989 YJ : Lifted/ Armored Tom95YJ's The Smurf Build Thread
1999 XJ : Lifted/Locked/Armored
Tom95YJ is offline   Quote
Sponsored Links
Advertisement
 
Old 04-10-2015, 12:56 PM
Thread Starter
  #4
Newb
 
Join Date: Apr 2015
Posts: 10
I have 33" tires. But why would that make a difference in 5th gear and not in 4th gear? In 4th i can go 70 +.
StevieJr is offline   Quote
Old 04-10-2015, 01:35 PM   #5
Jeeper
 
Twojump36's Avatar
 
Join Date: Jul 2013
Location: Oregon
Posts: 459
What motor?
__________________
2.5'' Rough Country, ARB Air Locked, 31'' BFG AT's
Twojump36 is offline   Quote
Old 04-10-2015, 01:44 PM
Thread Starter
  #6
Newb
 
Join Date: Apr 2015
Posts: 10
4.2l Five speed Laredo
StevieJr is offline   Quote
Old 04-10-2015, 02:01 PM   #7
Jeeper
 
Twojump36's Avatar
 
Join Date: Jul 2013
Location: Oregon
Posts: 459
Unless you have had your speedometer calibrated

At 70 mph you are actually doing.... 83.4
At 55 mph you are actually doing.... 65.5

I would not drive my jeep at 83 mph...

But to answer your question... I have no idea why your "car" (we call them jeeps) will go 70 in 4th but only 55 in 5th.... unless you have a problem with something else... I've not heard about "governed" jeeps...
Clutch good? You should have enough motor...
__________________
2.5'' Rough Country, ARB Air Locked, 31'' BFG AT's
Twojump36 is offline   Quote
Old 04-10-2015, 02:15 PM   #8
Jeeper
 
youjest88's Avatar
 
Join Date: Sep 2013
Location: Chicago area
Posts: 81
Are you trying to go uphill?

My 5th gear is useless too, but I don't know that it's actually slower than 4th.
youjest88 is offline   Quote
Old 04-10-2015, 02:32 PM
Thread Starter
  #9
Newb
 
Join Date: Apr 2015
Posts: 10
I have not had my speedometer calibrated. I am going to have this checked, thanks.
My clutch is good.
when in 5th gear at 55 it hits a wall. i can have my foot all the way down on the peddle and it stays at 55 mph and the RPM doesn't change. But in 4th i can go faster than 55 mph.
StevieJr is offline   Quote
Old 04-10-2015, 02:54 PM   #10
Jeeper
 
RednekYJ's Avatar
 
Join Date: Feb 2007
Location: LITH IL
Posts: 1,633
You are not in the "powerband" in 5th gear. This is why. The only way to fix it is to re gear the front and rear.
RednekYJ is offline   Quote
Old 04-10-2015, 03:07 PM   #11
Jeeper
 
mijeeper80's Avatar
 
Join Date: Mar 2014
Posts: 2,016
I need to regear mine because I have 33's but even with a 4 banger I can easily do 70 "on flat ground of course"

Seems that gears wouldn't be the issue, if I was doing 70 in 5th and dropped it into 4th I would be lucky to hit 60 without blowing the engine
mijeeper80 is offline   Quote
Old 04-10-2015, 03:56 PM   #12
Jeeper
 
Twojump36's Avatar
 
Join Date: Jul 2013
Location: Oregon
Posts: 459
The last time my jeep saw 70 was when it was being delivered to the dealership on the back of a semi-truck....
I do use 5th regularly as an overdrive... 4th has more power hit's the magic spot... 5th is a dog.. but it does work and pulls.
I have the 2.5... 5-speed with 4:10's
__________________
2.5'' Rough Country, ARB Air Locked, 31'' BFG AT's
Twojump36 is offline   Quote
Old 04-10-2015, 05:30 PM   #13
Jeeper
 
RawhideClab's Avatar
 
Join Date: Nov 2013
Location: Floresville, TX
Posts: 348
When you shift into 5th how fast are you going? You may not have enough power to take it from 55 up to say 70. Try using 4th to get up to 70 then shift into overdrive. If that is what you have been doing and having this problem I apologize for misunderstanding
__________________
1989 Base 2.5Low Output,
5SPD trans, 2" Body lift, 235/75R15 AT's
Fondly named by my wife: Latisha (in the spirit of the Dolly Parton's song "Jolene")
Do what you can where you are with what you have. ~ Theodore Roosevelt
RawhideClab is offline   Quote
Old 04-10-2015, 09:40 PM
Thread Starter
  #14
Newb
 
Join Date: Apr 2015
Posts: 10
Good thinking,but it was actually the first thing i tried. I took it to 70 in fourth and then threw it into fifth. then it slowly went down to 55.
StevieJr is offline   Quote
Old 04-10-2015, 11:12 PM   #15
Supporting Member

5-Year WF Supporting Member
 
CyndiB's Avatar
 
Join Date: Jul 2011
Location: Inland Empire, CA
Posts: 1,536
I have the same setup as you, 4.2 with a 4" lift and 33s, only it's a 90. I never use 5th gear. My speedometer shows 9 miles an hour slower than I'm actually going, so if it says 70, I'm actually doing 79. You don't need to calibrate your speedometer, if you have a smart phone, you can download a free app that uses gps to display your actual speed. I tested the app on my car first, then used it on my jeep.
CyndiB is offline   Quote
Old 04-11-2015, 10:54 PM   #16
Jeeper
 
justice22's Avatar
 
Join Date: Dec 2013
Location: Mississippi Gulf Coast
Posts: 145
I have the 4.2, with a 4 inch lift on 32's. I shift into 5th gear at any speed above 45 mph and have plenty of power and acceleration. If you can't get above 55 mph in 5th something is off. I couldn't use 5th gear either when I first got mine. I thought it was the "tires with original gears". A friend adjusted my carb and set my timing (it was way off). Jeep runs like a champ now in all gears, including 5th.
__________________
1988 Jeep Wrangler 4.2
Nutered and Weber Carb
4" Pro Comp Lift
32x11.50 Cooper Discoverer STT
justice22 is offline   Quote
Old 04-12-2015, 11:39 AM   #17
Supporting Member

WF Supporting Member
 
Tom95YJ's Avatar
 
Join Date: Sep 2013
Location: SLC, Utah
Posts: 2,831
Quote:
Originally Posted by justice22 View Post
I have the 4.2, with a 4 inch lift on 32's. I shift into 5th gear at any speed above 45 mph and have plenty of power and acceleration. If you can't get above 55 mph in 5th something is off. I couldn't use 5th gear either when I first got mine. I thought it was the "tires with original gears". A friend adjusted my carb and set my timing (it was way off). Jeep runs like a champ now in all gears, including 5th.
I can get mine to cruise at 70 in 5th with a 4.2l on 35's with stock gearing.
__________________
1989 YJ : Lifted/ Armored Tom95YJ's The Smurf Build Thread
1999 XJ : Lifted/Locked/Armored
Tom95YJ is offline   Quote
Old 04-12-2015, 12:18 PM   #18
Jeeper
 
Matroshka's Avatar
 
Join Date: Jul 2014
Location: Raleigh, NC
Posts: 81
I have an 87 with a 4.2, stock gearing, a 4 inch lift and 32s, and I have the same problem. I can hit 70mph or higher IF I shift into 5th from 65mph and I'm going downhill. However, it's such a pain in the ass I usually just keep it in 4th on the highway and ride between 55 and 60mph. I try never to ride above 60mph in 4th unless I plan on moving into 5th. I also don't feel like it's safe to drive it over 65mph regardless.
__________________
1987 Wrangler, 4.2l I6, Weber carb, BA10/5 5spd, 32in BFG's, 4 inch body lift w/ 4 inch shackles, bedlined interior. His name is Tank

My To-Do List:
https://www.quadratec.com/mygarage/w...hka%40live.com
Matroshka is offline   Quote
Old 04-12-2015, 12:24 PM   #19
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 4,119
No mention of what rearend ratio you are running but if you have the 3.07s 5th will be useless. I ran that for 10 years and never used 5th gear. Only way to make 5th gear useable is with a regear or smaller tires.
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 04-12-2015, 12:26 PM   #20
Jeeper
 
billiebob's Avatar
 
Join Date: Jun 2014
Location: Kootenays, British Columbia, Canada
Posts: 4,119
Gear Ratio Calculator

Go here to see what ratios do to speed/rpm/power
__________________
My Uncles first Jeep was Government issued in 1944..
When all Jeeps were Government issued.
billiebob is offline   Quote
Old 04-12-2015, 04:47 PM   #21
Jeeper
 
Dave Meyers's Avatar
 
Join Date: Mar 2015
Posts: 260
I agree that the problem is not being in the power band in 5th gear with 33s. Axle ratios make a huge difference. I had this issue with a 1985 Bronco and 1997 TJ 4 banger. Both were fine with 31s, but 33s turned them both into dogs in overdrive. I regeared the Bronco from 3.55 to 4.10 and the power returned. With the TJ I didn't lose enough power to switch back to 31s, I just didn't use 5th gear much at all.
Dave Meyers is offline   Quote
Old 04-12-2015, 08:57 PM   #22
Jeeper
 
RawhideClab's Avatar
 
Join Date: Nov 2013
Location: Floresville, TX
Posts: 348
I'm thinking gear ratios maybe a major part of you problem, but I would double check that your carb is dialed in.

__________________
1989 Base 2.5Low Output,
5SPD trans, 2" Body lift, 235/75R15 AT's
Fondly named by my wife: Latisha (in the spirit of the Dolly Parton's song "Jolene")
Do what you can where you are with what you have. ~ Theodore Roosevelt
RawhideClab is offline   Quote
Reply

Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off






All times are GMT -5. The time now is 01:31 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.