4X4 clunking in low and high......?

jimmak85 · 10-11-2009, 08:15 PM

hi, I'm still pretty new to these forums. so my problem is when I'm in 4X4 low truck sounds like its popping in and out of 4X4, when I'm in high it does it also just not as bad usually only if i hit the gas hard. I'm also looking for stock fender height on a 99 LS so i can figure out if my torsion bars are cranked, I think one bolt is all the way tight and the other is not I'm sure thats not how its supposed to be.

thanks

PJ242 · 10-12-2009, 12:55 PM

my low does this 2

nismo_2005 · 10-12-2009, 04:08 PM

is it your axles clicking?

jimmak85 · 10-12-2009, 04:17 PM

Quote: Originally Posted by nismo_2005

is it your axles clicking?

no, I'm sorry its more like it pops in and out of 4WD when it happens almost as if the diff or the transfer case is locking up and releasing fast. i just put new axles in and it did it before i put them in. someone told me it might be my shift fork in my transfer case not holing it in 4X4 enough.

nismo_2005 · 10-12-2009, 06:20 PM

push button or floor shifter? can you actually feel it kick out of 4 and back in or just hear it? does it make the truck jerk?

jimmak85 · 10-12-2009, 07:25 PM

Quote: Originally Posted by nismo_2005

push button or floor shifter? can you actually feel it kick out of 4 and back in or just hear it? does it make the truck jerk?

push button and you hit the nail on the head feels like the whole truck jerks .....

nismo_2005 · 10-12-2009, 08:21 PM

i dont know anything about the push button systems or the t cases in them. im sorry but taht gives someone alot clearer desription of what it is doing.

jimmak85 · 10-12-2009, 08:26 PM

Quote: Originally Posted by nismo_2005

i dont know anything about the push button systems or the t cases in them. im sorry but taht gives someone alot clearer desription of what it is doing.

its pretty much the same thing only the push button is done by vacuum actuators and electronics. so if it was a floor shifted case and it was doing the same thing what would it mean?

neo71665 · 10-13-2009, 12:22 AM

Chain slap in the t-case????

nismo_2005 · 10-13-2009, 01:11 PM

could it be the chain out of adjustment and just jumping a tooth or 2?

jimmak85 · 10-13-2009, 05:22 PM

i was kinda thinking that myself i just dropped the case cause the case to trans gasket was leaking pretty bad so ill split it tonight and let you guys know what i find.....

nismo_2005 · 10-14-2009, 08:14 AM

ok i cant wait.

Onimun · 10-14-2009, 01:01 PM

Mine was doing this too. Has not done it in a while. My thought initially was that it was the front diff. Under what conditions has it done this? Every time you put it into 4wd, or just sometimes? I havent had to use my 4wd for some time so Im not sur eif its still doing it. Its a very loud slamming.

And to the guy who asked if it was a Floor shift... You are stupid. Leave.

nismo_2005 · 10-14-2009, 01:58 PM

Quote: Originally Posted by Onimun

Mine was doing this too. Has not done it in a while. My thought initially was that it was the front diff. Under what conditions has it done this? Every time you put it into 4wd, or just sometimes? I havent had to use my 4wd for some time so Im not sur eif its still doing it. Its a very loud slamming.

And to the guy who asked if it was a Floor shift... You are stupid. Leave.

screw you. i have no experiance with the vacuum systems and im not going to pretend that i do. so i was just stating that i don't know anything about them.

jimmak85 · 10-17-2009, 02:57 PM

i have the t case apart but not sure what i'm looking at someone told me its in the shift fork anyone have any ideas

10-11-2009, 08:15 PM	#1
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	4X4 clunking in low and high......? hi, I'm still pretty new to these forums. so my problem is when I'm in 4X4 low truck sounds like its popping in and out of 4X4, when I'm in high it does it also just not as bad usually only if i hit the gas hard. I'm also looking for stock fender height on a 99 LS so i can figure out if my torsion bars are cranked, I think one bolt is all the way tight and the other is not I'm sure thats not how its supposed to be. thanks
	[Reply w/Quote]

10-12-2009, 12:55 PM	#2
PJ242 Registered User Age: 21 Join Date: Sep 2009 Posts: 19 Location: PA User is: OffLine	Re: 4X4 clunking in low and high......? my low does this 2
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10-12-2009, 04:08 PM	#3
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? is it your axles clicking?
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10-12-2009, 04:17 PM	#4
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	Re: 4X4 clunking in low and high......? Quote: Originally Posted by nismo_2005 is it your axles clicking? no, I'm sorry its more like it pops in and out of 4WD when it happens almost as if the diff or the transfer case is locking up and releasing fast. i just put new axles in and it did it before i put them in. someone told me it might be my shift fork in my transfer case not holing it in 4X4 enough.
	[Reply w/Quote]

10-12-2009, 06:20 PM	#5
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? push button or floor shifter? can you actually feel it kick out of 4 and back in or just hear it? does it make the truck jerk?
	[Reply w/Quote]

10-12-2009, 07:25 PM	#6
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	Re: 4X4 clunking in low and high......? Quote: Originally Posted by nismo_2005 push button or floor shifter? can you actually feel it kick out of 4 and back in or just hear it? does it make the truck jerk? push button and you hit the nail on the head feels like the whole truck jerks .....
	[Reply w/Quote]

10-12-2009, 08:21 PM	#7
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? i dont know anything about the push button systems or the t cases in them. im sorry but taht gives someone alot clearer desription of what it is doing.
	[Reply w/Quote]

10-12-2009, 08:26 PM	#8
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	Re: 4X4 clunking in low and high......? Quote: Originally Posted by nismo_2005 i dont know anything about the push button systems or the t cases in them. im sorry but taht gives someone alot clearer desription of what it is doing. its pretty much the same thing only the push button is done by vacuum actuators and electronics. so if it was a floor shifted case and it was doing the same thing what would it mean?
	[Reply w/Quote]

10-13-2009, 12:22 AM	#9
neo71665 4x4 v6 blazer Age: 30 Join Date: Oct 2004 Posts: 5,355 Location: rison arkansas User is: OffLine	Re: 4X4 clunking in low and high......? Chain slap in the t-case????
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10-13-2009, 01:11 PM	#10
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? could it be the chain out of adjustment and just jumping a tooth or 2?
	[Reply w/Quote]

10-13-2009, 05:22 PM	#11
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	Re: 4X4 clunking in low and high......? i was kinda thinking that myself i just dropped the case cause the case to trans gasket was leaking pretty bad so ill split it tonight and let you guys know what i find.....
	[Reply w/Quote]

10-14-2009, 08:14 AM	#12
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? ok i cant wait.
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10-14-2009, 01:01 PM	#13
Onimun Mr. Sparkle Age: 20 Join Date: Sep 2006 Posts: 8,898 Location: Southern California User is: OffLine	Re: 4X4 clunking in low and high......? Mine was doing this too. Has not done it in a while. My thought initially was that it was the front diff. Under what conditions has it done this? Every time you put it into 4wd, or just sometimes? I havent had to use my 4wd for some time so Im not sur eif its still doing it. Its a very loud slamming. And to the guy who asked if it was a Floor shift... You are stupid. Leave.
	[Reply w/Quote]

10-14-2009, 01:58 PM	#14
nismo_2005 one bad bow tie Age: 20 Join Date: Mar 2009 Posts: 782 Location: User is: OffLine	Re: 4X4 clunking in low and high......? Quote: Originally Posted by Onimun Mine was doing this too. Has not done it in a while. My thought initially was that it was the front diff. Under what conditions has it done this? Every time you put it into 4wd, or just sometimes? I havent had to use my 4wd for some time so Im not sur eif its still doing it. Its a very loud slamming. And to the guy who asked if it was a Floor shift... You are stupid. Leave. screw you. i have no experiance with the vacuum systems and im not going to pretend that i do. so i was just stating that i don't know anything about them.
	[Reply w/Quote]

10-17-2009, 02:57 PM	#15
jimmak85 Registered User Join Date: Dec 2008 Posts: 93 Location: User is: OffLine	Re: 4X4 clunking in low and high......? i have the t case apart but not sure what i'm looking at someone told me its in the shift fork anyone have any ideas
	[Reply w/Quote]