I need some help when I come to a stop my truck feels like it stops twice in the rear end not all the time but most of the time .
Fast or Slow stops it makes no difference.
I feel and hear a second bump when I come to a stop.I need to know that to look for to help trobleshoot this problem.

Thank You

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2000 XLT SPORT FLARESIDE SC SB LS 4.6 AUTO, SILVER,
WOOD DASH KIT,
SPEED GRILLE,
FORD DURALINER,
PREMIUM AM/FM/CASS
WITH 6 DISK CD CHANGER.

 

Mine does the same thing sometimes.I'm going to the dealership Monday for door cracks and rear window leaking. I will ask about our problem while there.

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97 XLT SUPERCAB 4X4 FLARESIDE 4.6L: AUTO, OFFROAD PACKAGE, 3.55 LS, TOWING PACKAGE, SILVER FROST

 

Mine did the same thing for a whole day,until I found that someone had tried to
swipe my spare! it's worth a look and an inexpensive fix. just ignore me if I sound ignorant,,,,98

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98 F-150 4.6 Litre XLT2wd Ext. cab
prarie tan/tan int.
K/N gen.II fipk
custom dual exh/gibson rectangle tips/rear exiting.
color matched snuglid
Superchip!!!
Westin nerfs blk .powdercoat
Clear front corners
Cobra 75WXST cb w/weather alert
Kenwood cd w/Radio Shack speakers,don't laugh it sounds pretty good
Viper 500HF Security system
On the way/wheels,tires,air dam, etc..etc.......
doin the monochromatic boogie
on the front end.Billet grilles on order
www.my-f150.com
Fender Guitars,ROCK!!!

 

Its probably your limited slip engaging.

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97 F-150 S/C 4x4 ORP XLT 4.6 K&N , Flowmaster w/dual tailpipes, Bosch+4 plugs,Ford 9mm wires,Superchip.Patriot fiberglass toneau cover, Westin chrome step bars. Rear seat lift 4".
Kenwood 4011 stereo, USAcoustics 2150 amp, Profile electronic 3 way crossover, 2 10" IDQ DVC's, and Polk Dx7 5x7/6x8 3 ways in the front doors.

FUTURE PERFORMANCE MODS:
4.10 gears, Edlebrock shocks, Magnacharger, Airaid, and slotted rotors.

OTHER FUTURE MODS:
Ram Air hood w/functional ram air, suspension lift, 17" polished wheels, 35" tires, and sunroof.

 

I have replaced my slip yoke 3 times on my 97 xlt 4x4 auto. It feels just like a rear end problem when they start to go out. I think it is a lub problem, of course ford has no clue as to what it is #*!&@. Check your slip yoke and have your mechanic check for cracks under the trans mtg brkt, exhaust and frame, yes frame. Some people have had to repl their frames. Mtg is too rigid, not allowing flex. Lack of ford stress analysis.

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My 94 Explorer and 96 Bronco both do this. It kinda feels like someone bumps you when you stop. And does the same when you take off. Ford mechanic told me it is the slip joints on the drive shaft sticking. If I get the time this weekend I am going to tear them down and grease them up. I have to take the rubber boots loose to do this, but should be an easy fix. I will let you know how it turns out.

Mike

 

Robin,
My 97 did the same thing... they replaced the slip yoke twice to no avail... Turned out to be the pinion yoke on the rear end.

KSMike,
Can't help with the the Bronco, but on the Explorer, there is a TSB on that problem... Assuming it doesn't do it all the time, the TSB is for fuel sloshing in the tank. If it does it all the time, it's probably the problem you described.

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98 Explorer (Lemon Law Case in Progress)
Deposit on '00 F-150, X-cab, 4x4, Lariat, Off-road, Trailer Tow, Sunroof, currently missing the fuel filler door, but they're working on that..

 

I took the driveshaft out of our 94 explorer and checked to see if the slip yoke was lubed. It appeared to have plenty of grease on it and the teflon coating was intact. It even operated smoothly out of the explorer. I put some new grease on it and put it all back together not expecting any improvement, but the mysterious "thump" was gone. So, who knows? Im going to try the same fix on my Bronco this weekend. I dont think it is gas sloshing in the tank, because I would have surely noticed it before 30,000 or so miles.

Mike

 

Well I took her in to the dealer on Friday, They are ordering a new driveshaft for me I hope this work? First they align my leaf springs and machine the rear rotors for excessive runout what every that is? but the noise was still there.

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2000 XLT SPORT FLARESIDE SC SB LS 4.6 AUTO, SILVER,
WOOD DASH KIT,
SPEED GRILLE,
FORD DURALINER,
PREMIUM AM/FM/CASS
WITH 6 DISK CD CHANGER.

 

Well I got my new driveshaft today so far so good no clunk sound.


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2000 XLT SPORT FLARESIDE SC SB LS 4.6 AUTO, SILVER,
WOOD DASH KIT,
SPEED GRILLE,
FORD DURALINER,
PREMIUM AM/FM/CASS
WITH 6 DISK CD CHANGER.

 

I finally got the time to re-lube the slip yoke on my rear driveshaft of my 96 Bronco (40,000 miles). The "bump" in the rear end is finally gone!! Yeeeehawww It's like new again. Thanks to somebody on this board for the tip!

Mike

 

I get that that "something shifting in the bed" thunk AFTER I stop noise too. Sometimes a good second after I have stopped. Since it is strongest with a 7/8 full tank of gas and I never hear it with less than 3/4 tank I'm pretty sure it's just the gas moving around.