Bad Shake at Take Off
#1
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.
Thanks for any help on this one.
#3
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 30,898
Likes: 0
Received 951 Likes
on
755 Posts
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.
#4
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.
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.
#5
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.
#6
Join Date: Nov 2005
Location: Charles Town, W bygod Va
Posts: 7,437
Likes: 0
Received 3 Likes
on
3 Posts
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.
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.
#7
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.
Trending Topics
#8
Thread
Thread Starter
Forum
Replies
Last Post
coltonimo
1987 - 1996 F150 & Larger F-Series Trucks
5
04-07-2018 09:05 PM
inline6fanatic
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
12
02-27-2007 01:47 PM
Mr. Finch
Clutch, Transmission, Differential, Axle & Transfer Case
2
03-28-2005 07:40 PM
hoxiii
Offroad & 4x4
11
11-29-2004 08:47 PM