is it the rear end or brakes

[trampsdieseltruck]

i went to leave work tonight and the back end of the truck felt like it was bouncing.i jacked the back axle up and put the tranny in neutral.it was hard to turn the back wheels by hand.when i turned one wheel on one side the other wheel would turn in the opposite direction,is this normal.can i drive the truck for about 5 miles to get the truck home or will i cause more damage.the truck also did this when i put the truck in neutral and coasted across the parking lot.what could be the problem and what do you think it would cost

[cdnsarguy]

If you mean the truck was pulsating across the parking lot as you drove, most likely the rear brakes were/are applied or the drums are possibly out of round....... Check the cables are slack....

[trampsdieseltruck]

thanks cdnsarguy but the parking brake was not on.would i cause any damage driving the truck 5 miles home??

[trampsdieseltruck]

ok i drove the truck home.it shook bad for 1 block then it ran great the rest of the way home.will be pulling the rear wheels off in the morning.could a rock have got in the wheel to cause the shacking

[Kevin 007]

I don't think a rock could have gotten in there but you never know. My guess is just some sized, rusty or sticky brake components, maybe a broken spring.
If you find yourself in that situation again you could always try to pound the backing plate of the drum with a hammer or rock in attempt to free up something that might be sticking.

And yes, the wheels do turn in the opposite direction when jacked up.

Good luck buddy!

[gnathv]

Check your universal joints. I had one seize up and it felt like the rear end.

[trampsdieseltruck]

pulled the wheels off this morning and it turned out to be the brakes where worn down and the brake cylinder right side came out to far making the brake stick

[cdnsarguy]

Not pointing fingers, but your findings just exemplify the reason there are MAX/MIN sizes for brake drums and rotors. Ensure after any brake job that your drums/rotors are within specs or the end result when things wear or you fail to adjust them as required will be the above or worse.

Remember backing up, stopping hard and driving ahead, repeat as necessary will adjust the rears if everything is working right. Try it you may like the results... higher pedal with less travel is always my result.

Rememberance Day 2009............. be there!!!!!!!!!

[trampsdieseltruck]

new rear brakes,new brake cylinders ,new brake lines.bled the brakes this morning and while the truck was on stands i told the wife to start the truck and put it in drive and see if the rear brakes come on.the truck STILL HAD A BAD VIBRATION.what a wast of $140 in new brakes.how can i tell if the problem is hanger bearing or u joint or rear end.i will be posting a video on the truck.any + help would be great i need the truck for work but cant aford to throw money away


EDIT = Here is a video I posted to help solve my problem. YouTube - Whats The Problem?

[Snotzalot]

You might have a damaged ring and pinion.

[Matt0987]

I looked at the video, could it be the midway carrier between the two drive shafts? There is a bearing, I believe, and a rubber mount for the bearing. See if the rubber mount is there, damaged, missing chunks, or the like. Or, if that bearing is shot.

[trampsdieseltruck]

i have a parts truck so sunday i will take the drive shaft/hanger bearing off and switch it with my truck

[trampsdieseltruck]

figured it out.i took the drive shaft from hanger bearing to the rear end out and the truck still shook.took the drive shaft/hanger bearing out and ran the truck with no vibration.the hanger bearing is fryed.

[Matt0987]

Well, figuing out the problem is half the work.