My truck shakes at 90 MPH - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 11-27-2013
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My truck shakes at 90 MPH

So i was taking my 2004 Ford Ranger Edge out for a drive and when I brought it up to 90 MPH it shook and it was slow to gain more speed. Anyone know what this problem may be from?
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Old 11-27-2013
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The factory speed limiter in your 2004 PCM is set at about 92 MPH. It is limited for powertrain protection.
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Old 11-27-2013
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Id say it's limited more so because of tires and driveshaft. I've been over 100 mph in my truck and the motor/trans isn't screaming at redline. Powertrain can handle it.

Driveshaft and tires On he other hand, won't hold up to sustained speeds like that. My old tires were rated for 112 mph so I decided to see if the truck could actually do that. And it did lol. Was sketchy, but it did it.
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Old 11-27-2013
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Honestly doubt more than a handful of people here have got there truck up to 90. Mine barely does 70
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Old 11-27-2013
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My truck shakes at 90 MPH-image-2531313922.jpg
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Old 11-27-2013
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I’d say don’t drive it 90 and it will not shake… lol !

Sorry had to !
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Old 11-27-2013
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Originally Posted by Scrambler82 View Post
I’d say don’t drive it 90 and it will not shake… lol !

Sorry had to !
This...drive slower :)

Mine has a shake around 68-70 now. I replaced the U-joints and that got rid of the 60 mph shaking, but the tires have a slight cupping and have been rotated. After the rotation, that's when it started, so I've been playing with the air pressure to help wear in the tread. So far it's worked fairly well.
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Old 11-27-2013
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Quote:
Originally Posted by 6.2 View Post
Id say it's limited more so because of tires and driveshaft. I've been over 100 mph in my truck and the motor/trans isn't screaming at redline. Powertrain can handle it.

Driveshaft and tires On he other hand, won't hold up to sustained speeds like that. My old tires were rated for 112 mph so I decided to see if the truck could actually do that. And it did lol. Was sketchy, but it did it.
His truck probably has the factory limiter. Mine had it until I turned it off with the tuner

Have you ever had yours removed?
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Old 11-27-2013
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His truck probably has the factory limiter. Mine had it until I turned it off with the tuner Have you ever had yours removed?
Yep. I had mine removed. I have it back on now though since my new tires are only rated to I think 99. So I don't wanna be tempted to go over 100 again lol.
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Old 11-27-2013
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Quote:
Originally Posted by rwenzing View Post
The factory speed limiter in your 2004 PCM is set at about 92 MPH. It is limited for powertrain protection.
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Originally Posted by 6.2 View Post
Id say it's limited more so because of tires and driveshaft . I've been over 100 mph in my truck and the motor/trans isn't screaming at redline. Powertrain can handle it.
Ranger speed is limited specifically to control driveshaft whip. The driveshaft is part of the powertrain.

A number of years ago, Ford had to issue a recall on the AWD Aerostar vans because of driveshaft, u-joint and transfer case failures caused by driveshaft whip at high vehicle speeds. They seem to have learned their lesson.
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Old 11-27-2013
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I thought the driveshaft was part of the drivetrain..... Not the Powertrain, no?
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Old 11-27-2013
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The powertrain should include torque converter or clutch, transmission, transfer case, driveshafts, differentials and drive axles. Many, including Ford, define the engine as part of the powertrain as well.

The term drivetrain is often used interchangeably with powertrain. It probably should not include the engine though.

There can be some variability in these terms, especially when it comes to things like a new car "Powertrain Warranty". Best to read the fine print carefully.
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Old 11-27-2013
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1. you have a 3.0 and it'll be slow to gain speed as is (i've had 2)
2. its a ranger w/ a factory limited speed
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  #14  
Old 11-27-2013
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I have no idea, as my 2.3 tops out at 85
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Old 11-27-2013
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With my old goodyear tires, the truck would start to shake at like 110 mph (the one and only time i went above 90ish
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Old 11-28-2013
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You were going 90 why?


The idiocity of youth....
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  #17  
Old 11-28-2013
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Vehicle shake...

Jesus Christ, Gentlemen...I went out of town for Thanksgiving. Some of the Interstate and most ALL of the major Texas highways are limited at 75. I have larger tires and am just too frickin' lazy to figure it out mathematically. Quick calculations...with 31" tires, which are about three inches taller than stock...figures, roughly an 8-10% speedometer error. I judge my speed by way of my GPS. When the GPS reads 80...I set the cruise control. GPS don't lie. if it says you're going 80...you're going 80 no matter the speedometer reading. I can only remember one time I ever took my truck over about 85. But i gotta hand it to those of you that flirt with 100 mile speeds...my ***** just ain't that big, I guess.

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Old 11-29-2013
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wait.. first.. your yelling us that your factory tires were 28 inches tall? its an edge right? that doesnt seem possible.. my factory tires on my sport wer like 30-31... also.. why were you going 90 in a ranger. they suck at 75.. also search before posting a question thats been aske 90000 times
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  #19  
Old 11-30-2013
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Rebuttal...

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Originally Posted by FordTough2007 View Post
wait.. first.. your yelling us that your factory tires were 28 inches tall? its an edge right? that doesnt seem possible.. my factory tires on my sport wer like 30-31... also.. why were you going 90 in a ranger. they suck at 75.. also search before posting a question thats been aske 90000 times
Chris,

Before we even leave the blocks let's get on the same page, Partner...I never asked any question nor did I ever claim to have pushed my truck over 85...and that was with stock tires.

First off, I was NOT yelling at anyone. Nor did I use any words that could possibly be construed as being derogatory. My exclamation was a reaction to the idea that anyone would push a Ranger to the limits claimed. And my words were something to the effect I had pushed my truck to 85 only a time or two..

Second, the stock tires (as per the sticker on the door jamb) were 235/75/15's. By my calculations those numbers work out to describe a tire that is nine and one quarter inches wide and just a hair over twenty eight inches tall. Now those are Ford specifications for my truck, a 2002 Ranger with the Edge package.

I replaced my stock tires with 31X10.50X15's. That makes the tires I have now three inches taller than stock. Now, according to my mathematical calculations (and I freely admit I'm no Rhodes Scholar) the stock tires being 90% of the height of the tires I have now gives a speedometer error of 10% (i.e., my speedometer is indicating only 90% of my actual speed). Therefore, in a perfect world, when my speedometer reads 70 MPH, my actual speed is 77 MPH. When GPS tells me I am running 80 my speedometer reads just under 72 MPH. I suspect the fact that my speedometer reads just a little over the 10% figure I eluded to earlier is due to the tires growing a fraction of an inch due to centrifugal force acting on my tires at highway speeds.

I apologize if my post was mis-construed...I assure you that was not my intention to seem like I was making remarks that chastised anyone...ANYONE.

So perhaps it might be you that is misreading the posts in this forum.

Hope you had a nice Thanksgiving and I hope you have a nice day.

JEG

Last edited by RazorEdge; 11-30-2013 at 12:47 AM. Reason: Misinformation
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Old 11-30-2013
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I think you are correct with 10% on the edge trucks... That's around what I experienced when I had 31s. You can calculate it pretty close using mile markers on the hiway and resetting your trip odometer, then calculate the % difference.
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Old 12-02-2013
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What's even dumber than trying to go 100mph in a Ranger? Taking pictures of your speedo while doing it. Stupid.
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  #22  
Old 12-02-2013
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What's even dumber than trying to go 100mph in a Ranger? Taking pictures of your speedo while doing it. Stupid.
No *****. This one has no ***** at all.
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Old 12-02-2013
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Originally Posted by powerranger262 View Post
What's even dumber than trying to go 100mph in a Ranger? Taking pictures of your speedo while doing it. Stupid.
Came across this kid on Instagram that has like a BRAND SPANKIN NEW Ranger. Gutted interior, "racing seats", and I'm not kidding you his headliner was replaced with random stickers. The thing is pretty tacky like a 16yr old would do to a truck his parents bought him. But if he likes it.....it's not my truck. He's got vids of 40-150? I'm guessing KPM....still stupid.

Really slick grille on this truck though.
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  #24  
Old 12-17-2013
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i can drive and get it up to 90 mp/h with no problems. it has an air intake kit and i took out the tailgate to avoid air resistance. so i can kick your azzes anytime
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  #25  
Old 12-17-2013
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Originally Posted by TxRanger99 View Post
i can drive and get it up to 90 mp/h with no problems. it has an air intake kit and i took out the tailgate to avoid air resistance. so i can kick your azzes anytime
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