460 Vibration
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5th Gear
Joined: Oct 2024
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460 Vibration
First off thank you to all of the help you guys offer.
Ok I have a 1979 Bronco with a 69 460 in it. A few weeks ago I went to start it and a large puff of smoke blew out from under the hood I thought it caught fire there was that much. So I started it the second time just fine but there was a vibration now and it wouldn't shift out of 1st gear. I got home tranny was a little low so I filled it. Still vibrating I have checked timing, compression(130 min), spark and plugs, push rods. Now I haven't checked #1 TDC and position of rotor but looking for some possible options before I pull what little hair i have left out. ANY help is greatly appreciated thanks.
. Bob
Ok I have a 1979 Bronco with a 69 460 in it. A few weeks ago I went to start it and a large puff of smoke blew out from under the hood I thought it caught fire there was that much. So I started it the second time just fine but there was a vibration now and it wouldn't shift out of 1st gear. I got home tranny was a little low so I filled it. Still vibrating I have checked timing, compression(130 min), spark and plugs, push rods. Now I haven't checked #1 TDC and position of rotor but looking for some possible options before I pull what little hair i have left out. ANY help is greatly appreciated thanks.
. Bob
Hotshot
Joined: Jul 2020
Posts: 10,480
Likes: 2,638
From: Near Salt Lake City
If you are lucky, you just broke a valve spring or bent a pushrod
I'd pull both valve covers and take a close look
Your vibration sounds like a dead cylinder to me
You mentioned pushrods, did you inspect all of the valve springs? Closely?
I'd pull both valve covers and take a close look
Your vibration sounds like a dead cylinder to me
You mentioned pushrods, did you inspect all of the valve springs? Closely?
Hotshot
Joined: Jul 2020
Posts: 10,480
Likes: 2,638
From: Near Salt Lake City
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5th Gear
Joined: Oct 2024
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Vibration
My vibration now maybe in the transmission. With this vibration the tranny doesn't shift while in D it can manually shift but it won't go into 3rd and won't leave 1st while in D.
Last edited by Bostonbob1958; Oct 26, 2024 at 08:29 PM. Reason: New info
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