I have a 2005 yukon xl . I owned it for 5 months but it makes a thuding noise under neath ?

20

Asked by May 22, 2013 at 11:26 AM about the 2005 GMC Yukon XL 1500 SLT

Question type: General

when you are going 45 to 50 miles per hour..it make the worse noise like something is falling apart underneath. Like something whacking against something else. I first thought it was the shield around the tire was loose. in front.. now it is under.. any ideas:??

23 Answers

Sounds to me like a transmission mount or two is torn...get a floorjack with a woodblock under that one and try to jack up the the whole assembly...that way the torn rubber would show itself~

20

where is the transmission on my rig? How big is it? How many are there under there.. The sound moves ..

between the engine and the driveshaft is the tranny, it has some shift linkage on the side and a vacuum modulator hose on the bottom~

could be the motor mounts as well, you can find those between the block and chassis, you could put a jack under there and lift by the pan with a wood block and look for splitting~

the pan is about 15" square, the mount is about 3" rectangle with captive connections so when the rubber does go to hell you end up a thudding noise underneath as you describe~

1 out of 1 people think this is helpful.
9,875

If there is no visible damage try checking the u-joints on your drive shafts and the front cv's going to the front wheels. Does the noise change when you have it in 4wd, try turning while moving. Most factory u-joints are now non-greasable and require replacement once worn out. Look for play or siezed u-joints.

2 out of 2 people think this is helpful.
33,395

Trans and engine mounts are most noticeable during hard acceleration and while engine braking(down shifting your trans to slow down). The trans mount will jump and slam on the flour while accelerating. It is generally just one thud. With a bad mount.... start with the u joints as big foot said.

1 out of 1 people think this is helpful.
33,395

General motors transmissions haven't had any vacuum lines running to them since fuel injection in 87... for future reference

1 out of 1 people think this is helpful.
9,875

They used the turbo 400 in some 3/4 ton/1 ton and rare v-8 1.2 ton W/T series trucks vehicles beyond 87, it has a vac hose But nothin that new.

1 out of 1 people think this is helpful.
33,395

My bad the 700R4 had vac lines up until 93 on select few models then it all went to 700R4E aka 460LE

1 out of 1 people think this is helpful.
9,875

I believe the 700/4l60 didn't have a vac line. So you were close in the first statement except for the use of the 400 untill the 4L80-e was attapted for the HD application later in the 90's

1 out of 1 people think this is helpful.

well whatever it's got, may have disconnected...that's the point. sheesh~

20

No when it does it... It is when you are going 45 to 50 miles per hr. and it will .. thud thud thud.. thud.. thud... worse when you are next to like a divider in the hwy.. or sounds worse. so I guess I need to have my mounts and u joints.. it is 2 wheel dr. not 4... thanks all...

1 out of 1 people think this is helpful.
20

the noise is toward the back, sound like anyway...

...like others have asserted, it's the U-joints....there are needle bearings in them what go to hell giving the condition that you describe~

20

thanks everyone... getting it in to be fixed and will let you know for sure what it was....

1 out of 1 people think this is helpful.
10

Thats more likely to be a ujoint has broken. $10 part at auto store. I've replaced it more than once.

1 out of 1 people think this is helpful.

watchout for those "french locks" which need a needlenose pliers to bend out of the way~

20

not u joints.. checked.. they have looked at everything. still noise at about 45 to 50 mi. per hour. some hear it in the front , some back. still there after checked several times.. bugs me..

5

have you figured out a fix for this problem? mine is doing the same!

20

No I never did.. I am driving it.. Had things checked out.. they found nothing... so I just drive it and ignore it.. sometimes it won't do it.. and then especially like down the turnpike next to a wall or something. it is bad...

20

Joseph do you have the same year and all??

5

oh I see, hm. Yeah I have a 2005 GMC Yukon XL SLT 4 wheel drive. I'm gonna keep working on it when I can, at least it drives for right now.

Your Answer

Add photo

Related Questions

Yukon XL

Looking for a Used Yukon XL in your area?

CarGurus has 12,162 nationwide Yukon XL listings starting at $1,999.

ZIP:

Search GMC Yukon XL Questions

GMC Yukon XL Experts

#1 TK76
TK76
Reputation 310
#2 Rowefast
Rowefast
Reputation 170
#2 kbro
kbro
Reputation 170
View All

Related Models For Sale

Used Chevrolet Suburban
349 Great Deals out of 19,118 listings starting at $1,350
Used GMC Yukon
348 Great Deals out of 17,289 listings starting at $2,500
Used Cadillac Escalade ESV
115 Great Deals out of 5,807 listings starting at $3,500
Used Chevrolet Tahoe
575 Great Deals out of 27,582 listings starting at $1,500
Used Ford Expedition
394 Great Deals out of 25,340 listings starting at $1,750
Used Cadillac Escalade
226 Great Deals out of 11,031 listings starting at $3,000
Used GMC Sierra 1500
795 Great Deals out of 67,166 listings starting at $2,700
Used GMC Sierra 2500HD
122 Great Deals out of 14,609 listings starting at $2,650
Used Lincoln Navigator
111 Great Deals out of 5,845 listings starting at $1,499
Used Toyota Sequoia
142 Great Deals out of 5,759 listings starting at $2,195
Used Chevrolet Silverado 1500
1,752 Great Deals out of 170,135 listings starting at $1,800
Used Ford F-150
2,245 Great Deals out of 209,704 listings starting at $1,499
Used Nissan Armada
121 Great Deals out of 8,996 listings starting at $2,500
Used Cadillac Escalade EXT
28 Great Deals out of 715 listings starting at $5,450

Used Cars For Sale

2017 GMC Yukon XL 1500 SLT For Sale
505 listings starting at $54,044
2016 GMC Yukon XL 1500 SLT For Sale
3 Great Deals out of 277 listings starting at $36,782
2015 GMC Yukon XL 1500 SLT For Sale
59 listings starting at $35,995
2014 GMC Yukon XL 1500 SLT For Sale
3 Great Deals out of 54 listings starting at $22,775
2013 GMC Yukon XL 1500 SLT For Sale
3 Great Deals out of 65 listings starting at $16,999