All right here we go, I have an 88fsb recently I've been hearing a thumping noise under my seat when I hit the gas. It dosen't do it all the time, I have new c6 tranny haven't had any trouble shifting, so I don't know if it is my driveshaft or ujoint. I saw a post were somebody had a thumping noise in the rear but this is deafitly coming from underneath my seat because i can feel it. Any help or ideas would be greatly appriciated.
Thumping Noise
Started by
shaun94
, Feb 02 2004 09:30 AM
8 replies to this topic
#2
davids78bronco
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fabricator extraordinaire
- Location:central Oregon
- Interests:Work all day, and build Bronco accessories in my free time. I've built pre-runner and winch bumpers, rock sliders and rear bumpers, w/ or w/o tire carriers, as well as HD cargo racks (not the bolt-to-your-hardtop POS's)
Posted 02 February 2004 - 10:33 AM
You're going to have to spend time, chasing this one down. Put the truck in N, set the parking brake, and crawl under there. Check for worn/broken motor/tranny mounts, driveline U-joints and the slip-joint, check for work yokes and/or worn bearings in the axles, or Tcase, check the backlash in the rear axle (IIRC, anymore than about 1/16 turn is too much)
#3
shaun94
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bronco commander
- Location:hooksett N.H.
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Posted 02 February 2004 - 12:22 PM
Thanks, I really appriciate it. I was a lost their for a little while.
1988 fsb
rebuilt reman 351
32 inch tires
cd player
flowmaster exhaust
c6 transmission
rebuilt reman 351
32 inch tires
cd player
flowmaster exhaust
c6 transmission
#8
BLADE262US
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F-Series Pimp
- Location:Michigan
- Interests:Ford there is nothing else =)
Posted 02 March 2004 - 07:05 PM
I agree with amcabbot my radious arm bushings in my F150 extended cab are shot right now and there a thumping noise under the seat . To look at them they look fine but under close inspection the cone part where it goes in the bracket has worn or broken off and it has been moving up and down and has polished the bracket .
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