clunk upon acceleration

[mygreen98]

03 ext, when accelerating i get a clunk underneath vehicle. feels like middle say trans/transfer case area. u joints are good. front rear changed last year. if gas pedal is feathered clunk not really noticable.

 

[Rollin Thunder]

MY 03 silverado had this, Had the tranny replaced and it does not make the noise anymore, teh clunk was the 1-2 shift. Even worse when speeding up.

 

[str8wkd1]

my 03 kon has this clunk trans is new feels like the transfer case to me seems to be geting worse over time to

 

[thaslick1]

have the same issue...... I'd like to know what it is

 

[Rollin Thunder]

I just re read the OPs post. Mine actully was horrible if I was super light on the throttle. Then got even worse about normal throttle, But heavy trottle was smooth as butter, could not understand it, but dealer said tranny was slipping from 1-2. So new 4L60E went in and got built to be alot more tough. Wanted a 4L80E but it was to much money and hassle to deal with.

 

[mygreen98]

seems to be a common problem, only noticable at speeds under 20-25ish. thanks for the quick replies.

 

[ridding-dirty]

Mine does this too, more so now that its cold out. Is this going to get worse??

 

[Tahoe7689]

I have the same problem!! Is there any way to fix it besides a whole new transmission

 

[str8wkd1]

dont think a new trans will help I have a new trans and it still dose it mine does it 2nd to 3rd and when you slow down and then back on gas

 

[thaslick1]

well if it's not the trans what could it be, bc I have no problem spending a little money to fix it but nobody can tell what it is

 

[chevytech03]

Try pulling the drive shaft and lube the splines on the inside of yoke, gm has some special lube for this, or just try some wheel brng grease, could be dry splines.

 

[Jimmy2000AF]

Try tightning the four bolts that hold the transmission cross brace in. That might do the trick.