Bumpety Bump in the front End...help! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chargedstang89 · 12-11-2003, 01:17 PM

On the way home from work yesterday, I slowed down to about 5mph because of traffic and from the front, right side of my truck, there was a loud BUMP BUMP BUMP and my hood was shaking. I thought I had a flat or ran over something, so I pulled over, but my tires were okay, and everything under my truck looked normal. I have an '85 GMC 1/2 ton 4x4 with 3.5" body lift. I got back in and proceeded to drive, and all was well. However, when I rolled the window down, I heard a constant ticking or grinding sound, similar to that of something rubbing on the rim or a gritty bearing. I put the tranny in neutral and it was still doing it, coming from the front right side. When I got off the highway by my exit and stopped, the truck made that loud bang sound again and I felt a jolt in the truck, and then that grinding sound went away and it hasn't done it since. What in the world is going on? Are my hubs going bad? No, I did not have the truck in 4x4. It has a 700r4 tranny and the 208 transfer case (gear driven). I believe it's the 208..lol Anyone got any input????

Grim Reaper · 12-11-2003, 03:56 PM

You have auto hubs don't you?

Take the hubs off and check your wheel bearings and the U-Joints. The ticking is probably the hubs.

**old Rusty C10** · 12-11-2003, 04:59 PM

id pull the right side brakes apart too just to check coulda had something in there but more than likely a ball cam out of your bearings in the hubs

12-11-2003, 01:17 PM	#1
chargedstang89 Registered User Join Date: Oct 2002 Posts: 90	Bumpety Bump in the front End...help! On the way home from work yesterday, I slowed down to about 5mph because of traffic and from the front, right side of my truck, there was a loud BUMP BUMP BUMP and my hood was shaking. I thought I had a flat or ran over something, so I pulled over, but my tires were okay, and everything under my truck looked normal. I have an '85 GMC 1/2 ton 4x4 with 3.5" body lift. I got back in and proceeded to drive, and all was well. However, when I rolled the window down, I heard a constant ticking or grinding sound, similar to that of something rubbing on the rim or a gritty bearing. I put the tranny in neutral and it was still doing it, coming from the front right side. When I got off the highway by my exit and stopped, the truck made that loud bang sound again and I felt a jolt in the truck, and then that grinding sound went away and it hasn't done it since. What in the world is going on? Are my hubs going bad? No, I did not have the truck in 4x4. It has a 700r4 tranny and the 208 transfer case (gear driven). I believe it's the 208..lol Anyone got any input????

12-11-2003, 03:56 PM	#2
Grim Reaper Registered User Join Date: Jul 2001 Location: Atlanta GA Posts: 1,704	You have auto hubs don't you? Take the hubs off and check your wheel bearings and the U-Joints. The ticking is probably the hubs. __________________ Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project

12-11-2003, 04:59 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,281	id pull the right side brakes apart too just to check coulda had something in there but more than likely a ball cam out of your bearings in the hubs __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!



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