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05-23-2011, 05:48 PM
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Learning to use the forums
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Join Date: May 2011
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Clunk when I hit the gas from a stop
The truck in question is a 2000 Ranger XLT 4x4, 3.0L V6, auto transmission. When I am at a stop and I hit the gas to start moving, about a half second after I hit the gas there is a clunk like something is slamming into gear. If I take my foot off the brake but don't hit the gas to let it creep forwards it doesn't clunk until I actually hit the gas. I'm not really sure what this could be, and how serious it is. I tried searching but I couldn't come up with much. Any help is appreciated. Thanks.
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05-23-2011, 05:51 PM
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www.shanewootenband.com
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Join Date: Oct 2010
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Re: Clunk when I hit the gas from a stop
motor mount or trans mount
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MY BUILD THREAD
1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..
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05-23-2011, 05:54 PM
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I'm an F-18, bro
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Join Date: Jan 2010
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Re: Clunk when I hit the gas from a stop
Yup, what he said up there ^^^
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1999 B2500 5 Speed
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05-23-2011, 07:35 PM
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no regrets
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Re: Clunk when I hit the gas from a stop
couldn't it be a u-joint? the second you apply some torque to the drive shaft it could "clunk"
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sold-91' extra cab 4.0 auto went from 3in lowered to 11in of lift.
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05-23-2011, 07:46 PM
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slut life
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Join Date: Oct 2010
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Re: Clunk when I hit the gas from a stop
doubt it unless he has a lot of vibration, sounds like a motor mount. pop the hood with the truck running and reve it up from the TB see if the motor moved a lot, and look at the mounts.
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done
98 2wd 2.5, 5 speed, dropped with some stuff done
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05-23-2011, 08:12 PM
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Learning to use the forums
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Join Date: May 2011
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Re: Clunk when I hit the gas from a stop
I'm not experiencing any noticeable vibration. I'll try checking the engine mounts. Are there any good DIYs out there for replacing those?
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05-23-2011, 08:21 PM
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Ban Survivor. (x2)
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Join Date: Jun 2010
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Re: Clunk when I hit the gas from a stop
I would check U-joint aswell, there super easy, crawl under there and grab it, turn it left-right you will tell right away if its that
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05-23-2011, 08:29 PM
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Sliver Snake
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Re: Clunk when I hit the gas from a stop
my old explorer did this thing where you would feel it through the pedal/floor like that and ford after 1000 bucks could never figure out why
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SOLDtruck:::2004 ford ranger XLT Flareside, V6 210hp 4.0L SOHC automatic
Mods: off road lights,tube step bars,painted interior,painted bumpers,back-up camera,bed cover,custom tails,brush guard,OHC,blinker mod
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Dodge Ram 1500 2011
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05-23-2011, 08:57 PM
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Ford Tough
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Re: Clunk when I hit the gas from a stop
maybe im reading it wrong, but this sounds textbook as a slip yoke in need of grease.
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2002 Ranger FX4
4.0L SOHC, 5R55E Auto, 4.10 8.8 Torsen, 31x10.5/15 BFG ATs
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05-23-2011, 10:33 PM
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Ford Tough
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Re: Clunk when I hit the gas from a stop
Sounds more to me like a u-joint. And you won't nessicarily feel vibrations in the truck if your u's are going, but I've got the same clunk, and it's my u-joint. Also had it in many trucks in the past.
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Nathan
-2010 4.0L 5-speed 4x4 Black Sport
3" SR Bodylift | T-Bar Crank | 6400 Shackles | 315/75/16 Disco S/T | Hella Rallye 4000 9" | 55W 6000K HID
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06-13-2011, 08:06 AM
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Learning to use the forums
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Re: Clunk when I hit the gas from a stop
Ok, I finally got around to looking things over. This isn't my primary vehicle in the summer months. I grabbed the rear driveshaft and tried to move it around but there was no play in it whatsoever. The front driveshaft on the other hand rotated a bit, maybe 3-5 deg. The u-joints appear to be ok, the play was coming from inside the front diff as far as I could tell. Is that much play bad? Also, is there any way to change the diff fluid (front or rear)? I didn't see a drain or fill plug.
I also tried revving the engine from the throttle body but the engine didn't move any more than it should when I did this. Something I still need to try that a friend suggested, is to have someone rev it up in drive while holding the brakes (so a load is applied) to see if it clunks. I'll post my findings when I do that.
Last edited by gdw6813; 06-13-2011 at 08:08 AM.
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06-13-2011, 10:01 AM
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Ingenuity at it's finest
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Re: Clunk when I hit the gas from a stop
Quote:
Originally Posted by FX4OR
maybe im reading it wrong, but this sounds textbook as a slip yoke in need of grease.
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x2
Ford sells a grease pack for it, dirt cheap. I'm assuming you have a steel shaft and not the aluminum one?
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10-15-2011, 05:04 PM
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Learning to use the forums
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Re: Clunk when I hit the gas from a stop
Quote:
Originally Posted by misterb-fx4
x2
Ford sells a grease pack for it, dirt cheap. I'm assuming you have a steel shaft and not the aluminum one?
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I don't know, I would assume steel. It's rusty.
Quote:
Originally Posted by gdw6813
Something I still need to try that a friend suggested, is to have someone rev it up in drive while holding the brakes (so a load is applied) to see if it clunks. I'll post my findings when I do that.
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I checked this and it didn't clunk. It has to be the front driveshaft or diff, I just don't know why. It seemed internal to the front diff when I turned the driveshaft with my hand. The front diff doesn't whine or make any other strange noises.
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2000 Ford Ranger XLT 4x4
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10-15-2011, 07:29 PM
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"Give Her the Biscuits"
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Join Date: Jun 2010
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Re: Clunk when I hit the gas from a stop
Mine does the same thing, I've heard it was my carrier bearing, or a slip yoke. When I have it at my mechanic on Wednesday for slop in my steering, he's gonna take a look at that as well. I'll let you know if I come up with anything.
From RS:
Problem: "I hear a 'thud' noise when I start and stop."
Solution #1: This is caused by a driveshaft slip-spline that was inadequately lubricated at the factory. All it needs it a sufficient quantity of Moly-type CV joint grease liberally slathered on (and inside) the spline (it's probably about a 20 minute job to pull the driveshaft, lube it and then reinstall it). Some have drilled the slip yoke and put a grease fitting in to grease it during regular maintenance.
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10-16-2011, 03:18 PM
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Learning to use the forums
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Re: Clunk when I hit the gas from a stop
Cool, thanks for that information. Definitely let me know what your mechanic says, I'd appreciate it.
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2000 Ford Ranger XLT 4x4
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