Loud Popp/clunk

[496 XL]

Hello All....plz help,

I have a 2005 Yukon XL,8.1 w 3:73's. approx 13,500 miles.

Recently I was backing my 7500lb+ camper back into my side yard,I had my front wheels against the pavement and ramping up onto the curb,as I gave it more and more gas, I thought I was going to start to spin,thats when I let off the gas and heard a loud popp or clunk like sound coming from the transmission area.I got out and did a visual and nothing obvious.I continued to park it and later crawled under to give a good look over and found nothing.Could this have been the Torque Management governing the tranny? Will take it to GM and the local tranny shop for a detailed look. Any and all idaes would be so much appreciated,due to no more towing till this is found. I have driven it at least 1 hundred miles since this and no problems.

 

Again plz help and all ideas/suggestions will be soo much appreciated.

 

rgds,

Perry

[wynton]

Do you have a locker?

[turbojoes]

every 4x4 that ive ever had did that a time or 2 and was no big deal.

[496 XL]

Wynton, locker?as in locking diff? it has the Auto-Ride,but locking diff not sure but leaning towards yes.

 

turbojoes, mine is a 4x4,but I was in 2 wheel drive, am I stll ok? Where you under a load when this happened to you?

 

thx again for the reply,

 

Perry

[svensk]

I wouldn't worry about it unless you actually experience problems with it. The 4l80E is pretty tough.

[496 XL]

you guys don't think something broke?

[svensk]

you guys don't think something broke?

Honestly, you would know.

[496 XL]

Just wondering when I tow again that it will be a mistake and when backing up or under a big torque load something is going to show itself.......

[wynton]

Wynton, locker?as in locking diff? it has the Auto-Ride,but locking diff not sure but leaning towards yes.

 

turbojoes, mine is a 4x4,but I was in 2 wheel drive, am I stll ok? Where you under a load when this happened to you?

 

thx again for the reply,

 

Perry

 

I just thought that sometimes a locking differential made a thunk sound when it engaged.

[turbojoes]

does it still drive fine? if so whats to worry about? i had that happen to me if i parked up to a parking block (or equivilent) and just put it into park and when i came back to the truck and moved the truck it would clunk due to having no slack in the driveline

[496 XL]

does it still drive fine? if so whats to worry about? i had that happen to me if i parked up to a parking block (or equivilent) and just put it into park and when i came back to the truck and moved the truck it would clunk due to having no slack in the driveline

 

 

yes it drives fine,hope I'll be ok.

[jjbleds]

mine did the same thing - 2004 xl, 8.1, 3.73, 15,000mi, 3000#trailer

i had been towing, got off exit ramp, came to a stop, started going again then, clunk!

i got under it just like you, nothing. it did this 2 or 3 times on a 3500mi trip.

i found some tsb's on pop/clunk sounds, but none of them applied. dealer found nothing.

1500mi later still no problems. i wouldn't worry.

[496 XL]

mine did the same thing - 2004 xl, 8.1, 3.73, 15,000mi, 3000#trailer

i had been towing, got off exit ramp, came to a stop, started going again then, clunk!

i got under it just like you, nothing. it did this 2 or 3 times on a 3500mi trip.

i found some tsb's on pop/clunk sounds, but none of them applied. dealer found nothing.

1500mi later still no problems. i wouldn't worry.

 

thanks soo much for your reply,I feel a little better now but stll cautious.........

again,thx.