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Old 09-29-2002, 12:17 PM   #1
bumper
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Join Date: Jan 2001
Location: western iowa
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Unhappy problem with jurking at speed

I'm not sure where to start. I have a 71 3/4 ton 4x4. Had the 350 auto trans rebuilt 2 years ago. It runs and shifts great but now when I get upt to 55mph it starts jurking bad like its not staying in high gear. I checked the vacuum lines. Could it be the torque convert? Any suggestions greatly appreciated.
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Old 10-01-2002, 10:10 AM   #2
JIMs70GMC
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Location: Chesapeake, Virginia
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My truck did that, was the fuel filter starving the engine.
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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 10-02-2002, 09:16 AM   #3
bumper
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cool

I 'll give that a try thanks
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Old 10-04-2002, 12:08 AM   #4
Fast68Chevy
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also inspect all hoses and lnes on the truck for kinks, etc,

good luck
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