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| | | | Joined: Jan 2006 Posts: 27 New Guy | | New Guy Joined: Jan 2006 Posts: 27 | Just a quick, easy to answer question for the experts in here. . . but I haven't been driving my truck hardly at all in the past three years, but have been for the last week or so. The problem I encountered is that there seems to be a substantial difference between power the truck previously had, and what I am getting now.
The engine and RPM behave normally, but the best way I can describe it is that there seems to be 'slip' between the engine and drivetrain. There aren't any appreciable noises to accommodate this issue, but when I lay on the gas, the RPM increases normally, but there is barely a response.
As far as the specs are concerned, it's a 350 pulled from a nova ss, 4-barrel carb, new-ish 3- speed tranny, conversion kit.
My gut feeling is that the loss is either with the clutch or transmission somewhere, but I'm really hoping for a more intelligent diagnosis than I can come up with. . . Thanks in advance for the help. | | | | | Joined: Oct 2006 Posts: 843 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 843 | are you using old gas perhaps? | | | | | Joined: Jan 2006 Posts: 27 New Guy | | New Guy Joined: Jan 2006 Posts: 27 | The gas is probably two months old, I've been diligent to run the engine, change the oil, etc while not driving it | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | If it is a manual trans. the only thing that could slip like that is the clutch. That generally doesn't happen that way from sitting. Its usually the other way around. the disc sticks to the flywheel & wont relaese. If you have a removeable lower pan under the flywheel You can look up in there & see what is happening. How about a clutch adjustment. There has to be at least a small amount of free play in the pedal. About1/2 to 1in. is normal.
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: Oct 2006 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 40 | As weird as it sounds, I have a had a clutch that would slip like that after the car set for a few weeks. The rear main seal had enough of a leak that oil would run down the transmission input shaft and saturate the clutch just enough. Whenever the car was first driven after sitting, the clutch would slip a lot. After a day or so the clutch would behave normally again until I would let it sit again. Check the rear main. | | | | | Joined: Jan 2007 Posts: 29 New Guy | | New Guy Joined: Jan 2007 Posts: 29 | just some ideas...
is the parking brake set?
had the parking brake been set but a cable didn't move when you released the parking brake?
wheel cylinder stuck leaving a brake dragging?
other than that I would think clutch slippage maybe from leaking rear main seal?
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