My 1996 has been making a strange whirring noise at speeds above 20mph. Gets more noticeable at 45mph, then I don't really hear it after 55mph.
I've asked my passengers if they notice something but nobody else really notices it.
Sounds sort of like gear whine. It's there when I'm on the gas or off the gas, but not when the drivetrain is "floating".
I tried to get a sound clip with my iPhone but it doesn't seem to pick it up.
Some background on my truck:
-VC has been deleted. It was locked up when I bought the truck.
-U-joints have been replaced. They had a tiny amount of play
-wheel bearings have been repacked. Front spindle bushings were replaced by me as PO replaced one of them and the shop that did it screwed it up.
-birfields have also been repacked with synthetic moly grease
-U-joints are greased with wheel bearing grease, slip joints with synthetic moly
-factory locked
I changed the transfer case fluid when I removed the Viscous Coupling, then I did it again about 200 miles after just to make sure that any contaminants that might have been introduced into the case when I opened it up were now flushed out.
F&R diff fluids are also fresh and synthetic.
Otherwise it drives absolutely perfectly. No vibrations, shimmys, shakes, or loud sounds. Just normal road and wind noise on the highway.
Another strange symptom is that I feel like the sound gets worse with the CDL locked. This is both on dirt roads and straight, level, tar roads.
Any advice is welcomed.
Thank you and stay safe everyone.
I've asked my passengers if they notice something but nobody else really notices it.
Sounds sort of like gear whine. It's there when I'm on the gas or off the gas, but not when the drivetrain is "floating".
I tried to get a sound clip with my iPhone but it doesn't seem to pick it up.
Some background on my truck:
-VC has been deleted. It was locked up when I bought the truck.
-U-joints have been replaced. They had a tiny amount of play
-wheel bearings have been repacked. Front spindle bushings were replaced by me as PO replaced one of them and the shop that did it screwed it up.
-birfields have also been repacked with synthetic moly grease
-U-joints are greased with wheel bearing grease, slip joints with synthetic moly
-factory locked
I changed the transfer case fluid when I removed the Viscous Coupling, then I did it again about 200 miles after just to make sure that any contaminants that might have been introduced into the case when I opened it up were now flushed out.
F&R diff fluids are also fresh and synthetic.
Otherwise it drives absolutely perfectly. No vibrations, shimmys, shakes, or loud sounds. Just normal road and wind noise on the highway.
Another strange symptom is that I feel like the sound gets worse with the CDL locked. This is both on dirt roads and straight, level, tar roads.
Any advice is welcomed.
Thank you and stay safe everyone.