Notices

351m flywheel freespin????

Thread Tools
 
Search this Thread
 
Old May 29, 2009 | 09:12 AM
  #1  
t-roy's Avatar
t-roy
Thread Starter
|
Freshman User
Joined: Mar 2005
Posts: 35
Likes: 0
351m flywheel freespin????

Hi I have a 1979 F150 4x4 with the 351m. Stock motor with headers and 4barrel carb automatic transmission. I was getting some knocking noise that later turned into the starter kicking in and hitting the flywheel. I thought the starter just crapped out. Put a new one in and It spinns the flywheel but not the motor??? I pulled the plate on the back of the motor to see the flywheel and watched it as the starter was ingaged and it spun but the motor didnt. I can reach in and turn it with my hand. Could this be the flex plate? Does it even have a flex plate? I saw teeth on it but I thought is was supposed to be attached to the motor and not move.
This sounds crazy can anyone help or have any ideas???
Thanks in advance.
T-roy
 
Reply
Old May 29, 2009 | 11:05 AM
  #2  
smokeyb97's Avatar
smokeyb97
Senior User
Joined: Jan 2008
Posts: 427
Likes: 1
From: Irondale, Al.
If it's an automatic then it's a flex plate and if you can spin by hand you've got broken bolts or broken flex plate.
 
Reply
Old May 29, 2009 | 11:25 AM
  #3  
mustang81's Avatar
mustang81
Laughing Gas
15 Year Member
Liked
Loved
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
Question

I'm not a mechanic but sound flywheel/flexplate problem at the crank. Lose bolt at the crank then the bolts broke off or the hole in your flywheel at the crank enlarge so much they reach the next set of hole and rip everything all arround.
Your probably have to remove the trans from the block buy seperate them and used longer bolt to allow you to remove the bolt at the crank with a long flat wrench. remove the bolts from the torque and slide out the flyweel. I know i did that on a 318 but never try an a 351m. My thinking.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Corn
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
12
Jan 1, 2020 03:48 AM
grayson20
1999 - 2003 7.3L Power Stroke Diesel
1
Dec 9, 2016 05:14 PM
Reached_my_limits
1978 - 1996 Big Bronco
13
Aug 18, 2016 08:54 PM
granny_rocket
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
30
Jun 28, 2012 07:47 PM
fordboy_52
Kansas Chapter
9
Mar 18, 2008 06:38 PM




All times are GMT -5. The time now is 04:14 AM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic 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 | 2026-06-03 11:38:36


VIEW MORE