slack in drivetrain

justin025 · May 6th, 2009, 07:26 PM

in first and second gear especially when i let off of the gas then hit the gas again it feels like there is slack and it bucks. is this normal or is there something wrong? i have 87000 miles. more importantly how do i fix it.

97GT4.6 · May 6th, 2009, 09:22 PM

Do you notice your shifter move back and forth by getting on and off of the gas?

It could also possibly be a driveshaft, or a u joint..

97stanggt · May 6th, 2009, 09:47 PM

my car jerks also but that seems to be a habit in the 5sp cars the 4.6 is a little jerky when u let off and get back on it in gear

JoshC! · May 6th, 2009, 10:02 PM

my first though is you u joints could be going out

justin025 · May 6th, 2009, 10:37 PM

if the u-joint is going out would i be able to wiggle the driveshaft with my hand?

justin025 · May 6th, 2009, 10:39 PM

my shifter vibrates when i drive but i thought that was normal, otherwise it doesn't move

JoshC! · May 6th, 2009, 10:42 PM

Originally Posted by justin025

if the u-joint is going out would i be able to wiggle the driveshaft with my hand?

watch the u joint when you do it. the u joint should be solid and not have any movement. the drive shaft will move a little but not the joint.

Originally Posted by justin025

my shifter vibrates when i drive but i thought that was normal, otherwise it doesn't move

a little shifter vibration is normal

justin025 · May 6th, 2009, 10:46 PM

ill have to get it on the lift tomorrow and check it out. about how much are they, should i just get an alum. one?

JoshC! · May 6th, 2009, 10:49 PM

you can just replace the u joints and it should be cheap. not sure how much. if you get a new drive shaft go with an alum. one for sure.

the misfit wolfie · May 6th, 2009, 11:32 PM

iv noticed the same thing in my car. although my shifter shakes quite a bit. sometimes around a half an inch to 3/4 inch. although it still works fine so i never gave it too much thought.

Antfo89 · May 7th, 2009, 01:07 AM

Pretty much seems like good ol' down shifting before matching up the rpms haha doesn't hurt ya but it will definetly jerk ya haha.

justin025 · May 7th, 2009, 10:37 AM

i know that will jerk but im talking about its in first or second you let off the gas still in gear then you hit the gas again and you feel the jerk from "slack" it gets progressively better as the gears get higher

justin025 · May 7th, 2009, 05:19 PM

ok i found out what it was, when i swapped rear end gears i guess the crush sleeve wasn't tightened down or to tight and the driveshaft has alot of play. there is alittle leaking from the yoke and from the diff cover. when i put it in reverse there is sometimes gear grind. yes this does sound bad but im wondering if i just take it apart replace the crush sleeve will everything be ok. i have to drive it 400+ miles in the next few days so that kinda sucks but i have been driving it like this for awhile.... i know it seems kind stupid of me. so how bad is this?

May 6th, 2009, 07:26 PM	#1
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	slack in drivetrain in first and second gear especially when i let off of the gas then hit the gas again it feels like there is slack and it bucks. is this normal or is there something wrong? i have 87000 miles. more importantly how do i fix it. __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

May 6th, 2009, 09:22 PM	#2
97GT4.6 Hardcore Enthusiast 97 GT 14.2@99.8 @ 4800 ft Join Date: Oct 2007 Location: Fort Collins and Pueblo, Colorado Posts: 2,347 iTrader: 1 reviews	Do you notice your shifter move back and forth by getting on and off of the gas? It could also possibly be a driveshaft, or a u joint.. __________________ Cammed 2v Built By MustangMatt More mods than times your daughter has slept around

May 6th, 2009, 09:47 PM	#3
97stanggt Regular 1997 Mustang GT Join Date: Feb 2009 Location: South Dakota Posts: 299 iTrader: 0 reviews	my car jerks also but that seems to be a habit in the 5sp cars the 4.6 is a little jerky when u let off and get back on it in gear __________________ ____________________________________________ 97 Stang GT 5sp 5.4L SOHC 96 F-250 Stroker -=-Modded-=- 08 Kawasaki Brute Force 7504x4I Selling PI Cams/NPI intake Alum Cross/4.6L LongBLock minus Oil pan and most of the timing cover bolts.

May 6th, 2009, 10:02 PM	#4
JoshC! ! Post Entirely Way Too Much 2000 GT Vert 14.646 @ 97.41 2.37 60' Need to hit the track with my new mods Join Date: Oct 2007 Location: Odessa, Texas Posts: 5,343 iTrader: 0 reviews	my first though is you u joints could be going out __________________ Im topless, are you? Topless Mustang Club Founder Black Stang Crew Member #boobs out mods/pics BAMA Performance Drag Team #3

May 6th, 2009, 10:37 PM	#5
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	if the u-joint is going out would i be able to wiggle the driveshaft with my hand? __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

May 6th, 2009, 10:39 PM	#6
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	my shifter vibrates when i drive but i thought that was normal, otherwise it doesn't move __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

May 6th, 2009, 10:46 PM	#8
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	ill have to get it on the lift tomorrow and check it out. about how much are they, should i just get an alum. one? __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

May 6th, 2009, 10:49 PM	#9
JoshC! ! Post Entirely Way Too Much 2000 GT Vert 14.646 @ 97.41 2.37 60' Need to hit the track with my new mods Join Date: Oct 2007 Location: Odessa, Texas Posts: 5,343 iTrader: 0 reviews	you can just replace the u joints and it should be cheap. not sure how much. if you get a new drive shaft go with an alum. one for sure. __________________ Im topless, are you? Topless Mustang Club Founder Black Stang Crew Member #boobs out mods/pics BAMA Performance Drag Team #3

May 6th, 2009, 11:32 PM	#10
the misfit wolfie Regular 1996 Mustang GT faster than the stealth Join Date: Jan 2007 Location: illinois Posts: 405 iTrader: 0 reviews	iv noticed the same thing in my car. although my shifter shakes quite a bit. sometimes around a half an inch to 3/4 inch. although it still works fine so i never gave it too much thought. __________________ 1996 Mustang GT 5-speed sold.. http://www.youtube.com/watch?v=5VuRDQGk4k8 http://www.cardomain.com/ride/3340297

May 7th, 2009, 01:07 AM	#11
Antfo89 Regular 1998 Mustang GT n/a Join Date: Aug 2008 Location: Vermont Posts: 132 iTrader: 0 reviews	Pretty much seems like good ol' down shifting before matching up the rpms haha doesn't hurt ya but it will definetly jerk ya haha. __________________ " There are alot of things to think about, but nothing to worry about "

May 7th, 2009, 10:37 AM	#12
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	i know that will jerk but im talking about its in first or second you let off the gas still in gear then you hit the gas again and you feel the jerk from "slack" it gets progressively better as the gears get higher __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

May 7th, 2009, 05:19 PM	#13
justin025 Regular 1998 mustang GT 14.02@98.25 Join Date: Feb 2009 Location: Clarksville TN Posts: 255 iTrader: 0 reviews	ok i found out what it was, when i swapped rear end gears i guess the crush sleeve wasn't tightened down or to tight and the driveshaft has alot of play. there is alittle leaking from the yoke and from the diff cover. when i put it in reverse there is sometimes gear grind. yes this does sound bad but im wondering if i just take it apart replace the crush sleeve will everything be ok. i have to drive it 400+ miles in the next few days so that kinda sucks but i have been driving it like this for awhile.... i know it seems kind stupid of me. so how bad is this? __________________ Pypes LT, BBK o/r h pipe, Flowmaster 40 Series, SCT Tune, 4.10 Ford Racing, H&R SS springs/ Eibach shocks, 10.5x17 nitto 555r's and 9x17 nitto 555's

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