Driveshaft woes
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Posting Guru
Joined: Jun 2002
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From: redding U.S.A.
Driveshaft woes
Hey guys.
I have what i am almost positive is an out of balance driveshaft.
I put the truck on the lift today and ran it in 3rd gear at about 35mph. The driveshaft had a visible runout in the middle. It seemed to be very slight, but i could see it pretty easily with the naked eye. maybe 1/16".
There aren't any weights on the driveshaft to speak of. The belhousing has a crack working its way around and the truck has a vibration that turns to a harmonic, then back to a normal vibration according to vehicle speed.
So i am going to see about getting the driveshaft inspected and balanced, but there are very few places around here that do that, i don't trust shops at all these days.
Does anyone know of any place i can simply order a new driveshaft for a 71 SWB 302/c4?
Any tips/recomendations or similar experiences?
I have what i am almost positive is an out of balance driveshaft.
I put the truck on the lift today and ran it in 3rd gear at about 35mph. The driveshaft had a visible runout in the middle. It seemed to be very slight, but i could see it pretty easily with the naked eye. maybe 1/16".
There aren't any weights on the driveshaft to speak of. The belhousing has a crack working its way around and the truck has a vibration that turns to a harmonic, then back to a normal vibration according to vehicle speed.
So i am going to see about getting the driveshaft inspected and balanced, but there are very few places around here that do that, i don't trust shops at all these days.
Does anyone know of any place i can simply order a new driveshaft for a 71 SWB 302/c4?
Any tips/recomendations or similar experiences?
Thread Starter
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Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
I gave Rhode Island driveshaft a call and have an apointment on Friday.
I told him the symptoms and that there wasn't a single weight to speak of on the shaft, he said "yup."
Hopefully this solves the problem and i can fix that bellhousing without worrying about it cracking again.
I told him the symptoms and that there wasn't a single weight to speak of on the shaft, he said "yup."
Hopefully this solves the problem and i can fix that bellhousing without worrying about it cracking again.
Senior User
Joined: Jan 2008
Posts: 109
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From: gaithersburg md
I had a friend who knocked off a driveshaft weight (non-ford). We put a radiator hose clamp on the shaft, just kept adjusting it and road testing. After about 20 miles and 20 or so adjustments the driveline vibrations were gone. The clamp stayed on for years.
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Posting Guru
Joined: Jun 2002
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From: redding U.S.A.
It may be especially helpful because i need to drive about 45 minutes to the driveshaft place tomorrow. I just put in new motor mounts and tranny mount too, and don't want to ruin them in one day because i was antsy.
Thanks for the help guys, i'll let you know how it all works out!
Thanks for the help guys, i'll let you know how it all works out!
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Logistics Pro
Joined: Feb 2000
Posts: 3,565
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From: Sun River St. George
Bent shaft will not damage the new mounts. Sometimes they can straighten the bent shaft but most likley they will replace the bent tube, re-balance the shaft and install new U-joints. You should be good to go for years after this.
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Thread Starter
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Posting Guru
Joined: Jun 2002
Posts: 1,288
Likes: 1
From: redding U.S.A.
Well i was there all day waiting for my girl, they had to cut the old shaft out and weld a new section in. Cost me a pretty penny but i didn't over pay, they are good over there.
RI Driveshaft. I will give them my business again. I'm sure i will need to have the driveshaft shortened when i redo the engine/tranny scenario in the truck.
Truck drives smooth as glass now. She just rolls on down the highway with a quiet hum.
Thanks for all the help guys.
RI Driveshaft. I will give them my business again. I'm sure i will need to have the driveshaft shortened when i redo the engine/tranny scenario in the truck.
Truck drives smooth as glass now. She just rolls on down the highway with a quiet hum.
Thanks for all the help guys.
