Bad Shake at Take Off - Ford Truck Enthusiasts Forums



1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Bad Shake at Take Off

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 07-31-2011, 08:31 AM
binghamtonF150 binghamtonF150 is offline
New User
Thread Starter
 
Join Date: Jul 2011
Posts: 4
binghamtonF150 is starting off with a positive reputation.
Question Bad Shake at Take Off

I am new here and hoping that someone can help me out on this one. Not long ago I started having a sever shake in my 1994 F150 with the 4.9l and a 5 speed manual. Well it only shook when I would start from a dead stop on level ground or going up hill, down hill I would let it roll a little then let the clutch out and it was fine. There is no shaking at any other time. It shook so bad that it broke the tranny so I just replaced it while I had the tranny out I replaced the clutch disk, slave cylinder and hydro line, new tranny mount and new U-joints in the rear driveshaft, havent hooked up the front yet. It got all back together and it started doing the same thing again, so I just replaced the motor mounts, they where busted too. That didnt stop it either. Can someone point me in the right direction??

Thanks for any help on this one.
Reply With Quote
  #2  
Old 07-31-2011, 08:41 AM
bashby's Avatar
bashby bashby is offline
Post Fiend
 
Join Date: Nov 2005
Location: Charles Town, W bygod Va
Posts: 7,357
bashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to all
It could be a missfire in the engine, usually a miss under load is caused by plug wires or other ign components.
Reply With Quote
  #3  
Old 07-31-2011, 09:42 AM
Conanski's Avatar
Conanski Conanski is offline
Post Fiend
 
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 24,197
Conanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant future
You may simply be getting too much axle wrap at launch which puts the rear driveshaft U-joint at an angle which will translate into a shudder or shake. Weak or broken leaf springs will cause this so maybe have somebody repeatedly put the drivetrain under load while you watch the rear end to see what it is doing.
Reply With Quote
  #4  
Old 07-31-2011, 09:56 AM
binghamtonF150 binghamtonF150 is offline
New User
Thread Starter
 
Join Date: Jul 2011
Posts: 4
binghamtonF150 is starting off with a positive reputation.
Thanks for the in put guys, I am doing a tune up today or soon, so I will see how that works, but I think if it was a bad plug or wire that I would feel it when pulling hills and it does just fine a the bigger hill by my house.

The axle and leafspring makes sense too, I replaced the rear spring mount on the passenger side but havent got the drivers side done yet, maybe that is where the shake is coming from.
Reply With Quote
  #5  
Old 07-31-2011, 10:19 AM
KC92F150 KC92F150 is offline
Senior User
 
Join Date: Oct 2004
Location: Las Vegas
Posts: 264
KC92F150 is starting off with a positive reputation.
Quote:
Originally Posted by binghamtonF150 View Post
I had the tranny out I replaced the clutch disk, slave cylinder and hydro line, new tranny mount and new U-joints in the rear driveshaft,
The only thing I can thing of that will cause a shake like that is oil on the clutch disk. You say you replaced the disk. Did you replace the pressure plate and resurface the flywheel?

Since you replaced the slave cylinder can we assume that it was leaking and that was a source of the oil. If that wasn't the source then maybe your rear main seal is leaking.

When isntalling a clutch, the disk, pressure plate and flywheel must be kept clean and free of oil. Even greasy finger prints will cause a problem.

Hope this helps.
Reply With Quote
  #6  
Old 07-31-2011, 10:27 AM
bashby's Avatar
bashby bashby is offline
Post Fiend
 
Join Date: Nov 2005
Location: Charles Town, W bygod Va
Posts: 7,357
bashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to allbashby is a name known to all
Quote:
Originally Posted by KC92F150 View Post
The only thing I can thing of that will cause a shake like that is oil on the clutch disk. You say you replaced the disk. Did you replace the pressure plate and resurface the flywheel?

Since you replaced the slave cylinder can we assume that it was leaking and that was a source of the oil. If that wasn't the source then maybe your rear main seal is leaking.

When isntalling a clutch, the disk, pressure plate and flywheel must be kept clean and free of oil. Even greasy finger prints will cause a problem.

Hope this helps.
This sounds more like what your symptoms are pointing to, what did the flywheel look like? Hot spots?
Reply With Quote
  #7  
Old 07-31-2011, 10:33 AM
binghamtonF150 binghamtonF150 is offline
New User
Thread Starter
 
Join Date: Jul 2011
Posts: 4
binghamtonF150 is starting off with a positive reputation.
I was loosing fluid in the clutch so when I replaced the tranny I was going to do the slave cylinder, but found out it was the hydro line instead, still changed both, the preasure plate and clutch disk looked new, I had to replace the disk because after I pulled it out my son thoght it would be fun to hit it with a hammer, lol. If I have to pull it back apart and replace the flywheel I will do that, maybe next weekend.
Reply With Quote
  #8  
Old 07-31-2011, 10:57 AM
White 97 xlt's Avatar
White 97 xlt White 97 xlt is offline
Postmaster
 
Join Date: Aug 2005
Location: Cleveland, TN
Posts: 4,487
White 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputation
I don't know if you have a 2 piece rear driveshaft, but if you do take a close look at the center bearing and its mount, the rubber in the mount gets old and does not support the bearing as it should and can cause some weird shaking at take off and low speeds..
Reply With Quote
  #9  
Old 07-31-2011, 11:03 AM
binghamtonF150 binghamtonF150 is offline
New User
Thread Starter
 
Join Date: Jul 2011
Posts: 4
binghamtonF150 is starting off with a positive reputation.
no I dont, it is a one piece, my truck is an extended cab stepside
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Chasing a bad vibration...getting scary! Zwalters 1999 - 2003 7.3L Power Stroke Diesel 58 05-13-2017 06:25 AM
2009 F-150 Lariat 5.4L 4x4 check engine light kpchambers 2009 - 2014 F150 4 11-12-2015 03:44 AM
Clutch shudder linked to CPS??....Theory inside Fordbronco69 1999 - 2003 7.3L Power Stroke Diesel 4 07-27-2013 10:48 AM
Front End Shake Nod Brakes, Steering, Suspension, Tires, & Wheels 1 09-18-2005 11:49 PM
Fuel Shut off? AirTran 3.0L V6 1 10-19-2004 05:57 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
460, 49l, 96, bad, badly, dually, end, f150, f350, ford, losing, rear, shake, shakes, stop, takeoff, taking, traction

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump


All times are GMT -5. The time now is 03:03 AM.