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Arl37 · 06-28-2012, 07:47 PM

Thanks to all for your comments. The truck was originally set at 12 degrees BTDC and when I noticed the pulsing I set back to 4. Still pulsing. Reset TV cable. No change in pulsing. U joints are all new and drive line balanced. Confident there is no drive line problem.
HOWEVER, in the process of trying to get as much road noise ( wheel bearings, ujoints etc) out of the truck as possible prior to painting I discovered today that the rear end is causing all the nosie. Sounds really shot and creates a whup de whump and low speed. I wonder if it could be so shot that it is causing the pulsing in 4th. 4th is really low. Must be 1 to 1 or lower. Would a really bad rear end cause the pulsing in 4th?

06-28-2012, 07:47 PM	#9
Arl37 Registered User Join Date: Jul 2011 Location: Valley Center, Ca Posts: 277	Re: Pulsing in 4th gear at crusing speed Thanks to all for your comments. The truck was originally set at 12 degrees BTDC and when I noticed the pulsing I set back to 4. Still pulsing. Reset TV cable. No change in pulsing. U joints are all new and drive line balanced. Confident there is no drive line problem. HOWEVER, in the process of trying to get as much road noise ( wheel bearings, ujoints etc) out of the truck as possible prior to painting I discovered today that the rear end is causing all the nosie. Sounds really shot and creates a whup de whump and low speed. I wonder if it could be so shot that it is causing the pulsing in 4th. 4th is really low. Must be 1 to 1 or lower. Would a really bad rear end cause the pulsing in 4th?