weird "thunk" noise - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 01-14-2013, 05:40 PM Thread Starter
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weird "thunk" noise

Hey guys. So Ive been hearing/ feeling a "thunk" noise coming from under my truck. I cant seem to pin point exactly where it is but it sounds and feels like its coming from the front drivers side, i can feel it in the floor. from stop or really slow speeds >5 mph I can start accelerating and then you can hear "thunk" and then its fine until i almost come to a stop then "thunk". Ive tried shaking and pulling on just about everything in the front end. Im stumped!

Truck info is in my sig.

Thanks!

2001 Ford F-250 Lariat
8" skyjacker lift
37" Nitto Muds
6637 Intake
Autometer Phantom IIs
4" turbo back straight pipe
PHP Hydra

LIFT IT!! fat chicks cant jump...
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post #2 of 10 Old 01-15-2013, 07:00 PM
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Im guessin ball joints.

PIS 175/80's, Van Turbo with EBPV, BD Billet Wheel
Lots of money spent at RiffRaff
Holley fuel pump, in tank mods, crappy riding leveling kit, DP-F6, 5 Gauges+Edge CS in dash, CB radio in Dash, over 100 goofy little mods
Still pretty slow, just less slow now.
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Originally Posted by peixinho View Post
I love finally having my truck back... that 7.3 dog that I was driving was just not cutting it.
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post #3 of 10 Old 01-15-2013, 07:14 PM
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Could be u joints also. ...

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E99/CC/Lariat/Factory Wide Body Kit
"The Mistress"
Power Hungry Performance HYDRA Chip
Custom Tuned by Bill@PHP, Tony Wildman@Total Diesel Performance and Lars@Gearhead



D66 w/Dieselsite WW2, Full Force 250/100s, Adrenalin HPOP, Built Trans, Walbro Fuel Pump, S&B Intake, 6" Stacks, Leveling Kit, Eagle Alloy Wheels, 315/75/16 Grabber AT2s & Much More




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post #4 of 10 Old 01-16-2013, 04:57 AM Thread Starter
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okay. checked the U-joints when i replaced the hubs, seemed to be fine. ill take a look at the ball joints tho. havent checked those haha. thanks guys!

2001 Ford F-250 Lariat
8" skyjacker lift
37" Nitto Muds
6637 Intake
Autometer Phantom IIs
4" turbo back straight pipe
PHP Hydra

LIFT IT!! fat chicks cant jump...
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post #5 of 10 Old 01-16-2013, 01:34 PM
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Mine has been doing it too. I have almost the exact same package you do Spoolin. It's been doing it for a bit now and today my hub assembly started grinding really bad. Same thing it did four months ago when it disintegrated on me. Thank goodness for warranty! The noise might be your hub..... Idk.....



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes
Cosmetic: Bushwhacker fender flares. Moto Metal 951 18's wrapped with Nitto Trail Grapplers 295/70/18
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post #6 of 10 Old 01-16-2013, 04:30 PM
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Look at this.
Search: Member heykerrdog, or clunk, thud, bump, spline grease job.

My truck was doing the same thing at low speed. Like the drive train was catching up at a stop and start. I was thinking the trans was lose and gettin' ready to fall out. I greased the spline on the drive shaft and no more clunk.

I tried to link the post before but it did not work, that's why I say do a search.

hope this helps. Clunk, Thud, Bump, Double Bump, Spline Grease Job


bax

I

'01 F250 4X4 Auto Crew Cab
160,000 Miles
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post #7 of 10 Old 01-18-2013, 12:21 AM Thread Starter
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@ maddawg, I changed my hubs back in october. the drivers side decided it needed to eat itself coming off the highway, at 50 mph it locked up a 37x13.5 tire... exciting. but i dont think itd be the hubs, its a thunk not a grind.

@ Bax, Im gonna start here. ive been around these trucks for quite a while and ive never heard of this problem but i read thru that whole thread and it seems to me like its a pretty popular problem. looks like i know what im doing this weekend!

thanks again guys.

2001 Ford F-250 Lariat
8" skyjacker lift
37" Nitto Muds
6637 Intake
Autometer Phantom IIs
4" turbo back straight pipe
PHP Hydra

LIFT IT!! fat chicks cant jump...
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post #8 of 10 Old 01-18-2013, 03:15 AM
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weird "thunk" noise

Is ur truck lifted i have a 01 f350 lifted and it does the same thing i can feel it on the floor board on drivers side and it happens everytime i turn a corner or hit a bump i looked the truck up and down and finnaly found that the front springs were sliddin back in forth and slammin into the shackles might need to replace some bushings


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post #9 of 10 Old 01-18-2013, 12:45 PM Thread Starter
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Yah my truck has an 8" lift. I bought it with that lift tho so ill definitely check out the bushings and see what condition they're in.

2001 Ford F-250 Lariat
8" skyjacker lift
37" Nitto Muds
6637 Intake
Autometer Phantom IIs
4" turbo back straight pipe
PHP Hydra

LIFT IT!! fat chicks cant jump...
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post #10 of 10 Old 02-15-2013, 01:57 PM
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grease the drive shaft splines... problem solved
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