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| | | | Joined: Dec 2001 Posts: 34 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2001 Posts: 34 | My friends, I've got a 66 long bed 250 six with a four speed "granny" trans... Two years ago I rebuilt the engine and it runs great... thanks to this site and advice from some great local mechanics. A few months ago it started to make a howling sound when ever I let off on the gas. Give it some gas and the sound immediately stops. Going down hill if not accelerating, it starts to howl again, going up hill with power, no noise. Is this a trans problem or drive train problem...? frankly the noise sounds right under the seat... any help with what it might be would be greatly appreciated.
| | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | sounds like probably the pinion bearing, especially if it happens in a certain speed range
Bill | | | | | Joined: Dec 2001 Posts: 34 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2001 Posts: 34 | Thanks.... is this an easy repair? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | depends on your skill level, replacing the pinion bearing and seal should be outlined in your shop manual, and the parts should be readily available at a FLAPS
Bill | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Check to see if the pinion nut has come loose.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | Throw out bearing possibly or Ujoints. The pinion nut should be like 250 Ft Lb torque, Could be what was said: Nut or pinion brg. Try down hill in neutral, coasting, that way ring/pinion and ujoints are being driven by the forward motion, not the engine. See what happens. It's something where the torque of the drivetrain is taking out the "slop" and when relaxed is howling. Ujoints are easy and cheap to replace to see if there is any improvement. Usually you can not tell if ujoints are bad by exam or feel while on truck. You are half way there when you check/tighten Nut 
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Dec 2001 Posts: 34 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2001 Posts: 34 | | | |
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