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Old 03-17-2015, 10:39 AM   #1
bmchevy1979
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Driveshafts?

How common is it to break a drive shaft instead of a U-joint in 2wd with a 4spd? my truck only has a mild 350 under 400ft.lbs of torque and I twisted the shaft completely in two. My truck 74k5 started rolling back when I let off brakes on a small hill at a stop sign so I gave it a little more than usual to keep from hitting buddy who was following me and goodbye driveshaft didnt really give it my all but my truck doesnt have best gearing either 3.73 with 33s
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works.
1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15
81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in
1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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Old 03-17-2015, 12:47 PM   #2
JIMs70GMC
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Re: Driveshafts?

I would say not common. Did you ever ding the driveshaft? I don't think it takes much to twist if it has ever been stressed. Hopefully it didn't tear anything else up.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-17-2015, 01:34 PM   #3
bmchevy1979
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Re: Driveshafts?

I dont think I managed to ding it the driveshaft it was only about a month and a half old and my angles are pretty darn close if not right on I havent wheeled in anything that I have bottomed out on yet since the swap to a 4spd. Luckily it only dented a muffler that is the only damage that I have been able to tell
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<Brandon>
1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works.
1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15
81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in
1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096
1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195
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