Notices
1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage
Sponsored by:
Sponsored by: Auxito

Speeding up and slowing down

Thread Tools
 
Search this Thread
 
Old Nov 9, 2007 | 09:25 AM
  #1  
BURNSTOUGHFORD's Avatar
BURNSTOUGHFORD
Thread Starter
|
Posting Guru
Joined: May 2006
Posts: 2,486
Likes: 0
From: Iowa
Speeding up and slowing down

This might be related to my untuned computer, so i dont know ...see what you fellas think...

With the cruise set and going up and down hills..... as im going down a hill at lets say 65mph it will fluxuate up and down....like slow down and speed back up, or speed up and then slow down...what ever....kinda pulsing really... its really weird.... only does this once and a while...not every hill.... but only on the down hills..

Any ideas
 
Reply
Old Nov 9, 2007 | 10:02 AM
  #2  
ajbeiler's Avatar
ajbeiler
Senior User
Joined: Dec 2006
Posts: 136
Likes: 0
From: Lima Ohio for college
my truck was doing the same thing. i found out my rear axle spiders are worn out so bad that the backlash is incredible. that was my problem. good luck
 
Reply
Old Nov 9, 2007 | 10:17 AM
  #3  
BURNSTOUGHFORD's Avatar
BURNSTOUGHFORD
Thread Starter
|
Posting Guru
Joined: May 2006
Posts: 2,486
Likes: 0
From: Iowa
Did your truck also make wierd noises like a differential clunk when hard turning.... its not the Limted slip problem that people have.... it something completely different...
 
Reply
Old Nov 9, 2007 | 07:14 PM
  #4  
superdutymj's Avatar
superdutymj
Elder User
Joined: Jun 2004
Posts: 883
Likes: 2
From: La Crosse, Kansas
maybe your cruise control cable is getting bound up somehow. I had to replace mine because of similar symptoms and the cable had worn into the casing and was getting bound up. take your tb cover off and twist the throttle bracket and see if the cable snaps back or just kind of hangs out there for awhile.
 
Reply
Old Nov 9, 2007 | 07:19 PM
  #5  
ajbeiler's Avatar
ajbeiler
Senior User
Joined: Dec 2006
Posts: 136
Likes: 0
From: Lima Ohio for college
i have not noticed any noises from it when i turn just way to much back lash and side to side movement. if you have heard about a different problem with the 8.8 ls rear end please let me know im going to rebuild it soon as i get the parts
 
Reply
Old Nov 9, 2007 | 08:00 PM
  #6  
Phillip Guidry's Avatar
Phillip Guidry
Posting Guru
25 Year Member
Joined: Jun 1999
Posts: 1,525
Likes: 1
Does it accelerate while trying to go up a decent hill ?....Keep in mind that cruise control tries to keep the speed constant without your control.......some decelerating and accelerating is normal while going over hills and over pass'es
 
Reply
Old Nov 9, 2007 | 08:17 PM
  #7  
BURNSTOUGHFORD's Avatar
BURNSTOUGHFORD
Thread Starter
|
Posting Guru
Joined: May 2006
Posts: 2,486
Likes: 0
From: Iowa
yes i know...its only when going down hill...its fine all the time except going down hill...and this only till recently
 
Reply




All times are GMT -5. The time now is 05:49 PM.

story-0
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-1
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-2
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-3
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-4
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-5
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-6
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-7
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-8
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-9
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE