harmonic balancer ??
Thread Starter
|
Tuned
Joined: Mar 2003
Posts: 394
Likes: 10
From: austin
harmonic balancer ??
I've got a significant vibration that I believe is the harmonic balancer. It's bad between 1000-1500 RPM, worst around 1200, in all the gears. It also occurs just sitting in my driveway, so I know it's something with the engine. I've replaced the motor mounts and compression check was fine. Any other possible ideas than the harmonic balancer?
Thanks in advance!
TM
Thanks in advance!
TM
More Turbo
Joined: Mar 2002
Posts: 508
Likes: 2
From: Easthampton, Ma.
I had a 1982 F250, 302 motor with NP435 standard transmission.
It had an identical vibration to yours!
I replaced the harmonic balancer, both motor mounts and transmission mounts (slight improvement)
New clutch disc and pressure plate, had flywheel resurfaced
(much worse)
Replaced flywheel with Ford OEM flywheel from dealer
(vibration completely gone)
Good luck!
It had an identical vibration to yours!
I replaced the harmonic balancer, both motor mounts and transmission mounts (slight improvement)
New clutch disc and pressure plate, had flywheel resurfaced
(much worse)
Replaced flywheel with Ford OEM flywheel from dealer
(vibration completely gone)
Good luck!
Elder User
Joined: Oct 2002
Posts: 513
Likes: 0
From: Lincoln NE
Torquemeister, was your oem flexplate ever replaced?
Mine worked fine until I decided to ruin it when I was putting my tranny back in and I didn't have the torque converter lined up right with the flexplate and warped it when I tightened it down. Beings it was a Sunday, the only place open with one in stock was autozone and now I'm kicking myself cause I've a vibration now too that wasn't there before I did all this. My point is, if you do have to replace it, I would get one oem. When the weather gets nicer, I'm gonna replace mine. Just my two cents.
Mine worked fine until I decided to ruin it when I was putting my tranny back in and I didn't have the torque converter lined up right with the flexplate and warped it when I tightened it down. Beings it was a Sunday, the only place open with one in stock was autozone and now I'm kicking myself cause I've a vibration now too that wasn't there before I did all this. My point is, if you do have to replace it, I would get one oem. When the weather gets nicer, I'm gonna replace mine. Just my two cents.
Thread Starter
|
Tuned
Joined: Mar 2003
Posts: 394
Likes: 10
From: austin
Thanks for the replies. I'm not sure if the flexplate is original or not. I've had the truck for about a year, and the vibration has been there since I bought it. It's not my daily driver, just a project. I did the rear main seal when I first got it, so now I'm wishing I would've done the flexplate then!! I'll have to start pricing them, I guess. Autozone has theirs for $48, any idea how much for the OEM?
Thanks,
TM
Thanks,
TM
Elder User
Joined: Oct 2002
Posts: 513
Likes: 0
From: Lincoln NE
No, I haven't priced one at OEM. I've been sorta putting that project off, but it is gonna be getting warmer out and my rear main seal is still drippin a little... So I'm sure it won't be long before I find out.
One other option for you is to check around your local salvage yards. I was visiting mine yesterday and surprised at some of the goodies I found for myself there.
One other option for you is to check around your local salvage yards. I was visiting mine yesterday and surprised at some of the goodies I found for myself there.
Thread Starter
|
Tuned
Joined: Mar 2003
Posts: 394
Likes: 10
From: austin
I guess it'll be found at a local salvage yard sometime. fordpartsonline.com has the OEM flexplate for $230 (AutoBad = $50) and the harmonic balancer OEM = $93 (AutoBad = $80 for a Dorman).
TM
TM
Trending Topics
Elder User
Joined: Oct 2002
Posts: 513
Likes: 0
From: Lincoln NE
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Freshman User
Joined: Jan 2004
Posts: 32
Likes: 0
I had an old chevy truck. I was working on the carb. I noticed then that when the truck was running the harmonic balancer was worbling something terrible. After shutting it off, it was cracked to and seperating from the rubber core.
NOW, even with all that going on there was no discernable vibration noticeable at idle or driving it.
Had a '74 Nova...was replacing a blown engine. Made the mistake of seperating the engine and trans in the car to replace rather than take them out together- then seperating.
After getting the new used sheet in there and running again...the car had a horrible vibration. Increased with revs. Increased on the highway so bad u just got use to your teeth chattering and knocking in your head cruising around.
Everyones guess was that we bent the torque converter or flywheel re-uniting those 2 objects. We never got to the bottom of it and no one forked out the cash to try and fix it. The buddy who got the car after the original blown engine drove it like that for a couple years before it finally found its way to the boneyard.
NOW, even with all that going on there was no discernable vibration noticeable at idle or driving it.
Had a '74 Nova...was replacing a blown engine. Made the mistake of seperating the engine and trans in the car to replace rather than take them out together- then seperating.
After getting the new used sheet in there and running again...the car had a horrible vibration. Increased with revs. Increased on the highway so bad u just got use to your teeth chattering and knocking in your head cruising around.
Everyones guess was that we bent the torque converter or flywheel re-uniting those 2 objects. We never got to the bottom of it and no one forked out the cash to try and fix it. The buddy who got the car after the original blown engine drove it like that for a couple years before it finally found its way to the boneyard.
Posting Guru
Joined: Sep 2002
Posts: 2,420
Likes: 3
From: Langhorne, PA
The harmonic balancer(dampener) is a good place to start looking. Peek at it while on the truck, if it has a rubber spacer between the center metal assy., and the outer metal pulley , you should carefully visually inspect it. I don't know much about your truck( not too many details included about it) but my 92 4.9L has that type of pulley. Look at the balancer while it's running, maybe you could detect a slight wobble if you put some good light on it.
First of all, as a life long troubleshooter, I was taught when your'e not exactly sure what the problem is, to replace the easiest to remove and cheapest parts first.
I just attached my flexplate to the engine and re-bolted to my torque convertor. I may have screwed up the job, I'm not sure yet, the engine hasn't been run yet. I noticed that there is play between the flexplate and torque convertor, as I was turning the engine by hand and tightening the nuts, I noticed a 1/32 inch or 1/16 bit of play between the two. The fit between the TC and flexplate isn't tight, I am hoping that the center hub of the TC is real tight into the center of the flexplate, I never tested to see how they fit together while the engine was out, (my bad)
First of all, as a life long troubleshooter, I was taught when your'e not exactly sure what the problem is, to replace the easiest to remove and cheapest parts first.
I just attached my flexplate to the engine and re-bolted to my torque convertor. I may have screwed up the job, I'm not sure yet, the engine hasn't been run yet. I noticed that there is play between the flexplate and torque convertor, as I was turning the engine by hand and tightening the nuts, I noticed a 1/32 inch or 1/16 bit of play between the two. The fit between the TC and flexplate isn't tight, I am hoping that the center hub of the TC is real tight into the center of the flexplate, I never tested to see how they fit together while the engine was out, (my bad)
Thread
Thread Starter
Forum
Replies
Last Post
Moiford
1948 - 1956 F1, F100 & Larger F-Series Trucks
6
Jan 15, 2016 06:23 PM
abyars111
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
4
Oct 4, 2014 06:57 PM
MIKEDEL
1948 - 1956 F1, F100 & Larger F-Series Trucks
6
Dec 15, 2011 06:43 PM