Engine Vibration

Little Grub · 01-20-2006, 12:12 PM

I recently installed a manual transmision in my 1989 K1500 pick-up that originally had an automatic, and now a have a very bad vibration in the engine. I bought a new flywheel for that year of truck and a new cluch and pressure plate and throw-out bearing and also a new pilot bushing. The motor is about 5 years old and is a balanced and blueprinted crate motor from Autozone. What are some possible causes?

Moostang · 01-20-2006, 01:12 PM

Was that engine balanced with that flywheel? It could be one of the causes.

chevyguy · 01-20-2006, 10:51 PM

Is the vibration noticable with the truck sitting still and the clutch depressed, or just when driving?

gmtech · 01-21-2006, 11:00 AM

You might check with a parts store and see if the harmonic balancers are the same for an automatic and manual transmission, something tells me they are different.

Little Grub · 01-27-2006, 06:23 PM

Thanks guys,

I got thinking about it the other day and thought that the imput shaft may be bent were it rides in the pilot bushing, so I pulled the tranny and went and got a junk-yard five speed and that solved the problem. I sound kinda weird because even with the transmission in gear and the cluch pushed in it still vibrated because the pilot bearing was still spinning around the end of the imput shaft. It now works great and gets better gas milage! Thanks Again.

01-20-2006, 12:12 PM	#1
Little Grub Junior Member Join Date: Jan 2006 Posts: 3	Engine Vibration I recently installed a manual transmision in my 1989 K1500 pick-up that originally had an automatic, and now a have a very bad vibration in the engine. I bought a new flywheel for that year of truck and a new cluch and pressure plate and throw-out bearing and also a new pilot bushing. The motor is about 5 years old and is a balanced and blueprinted crate motor from Autozone. What are some possible causes?

01-20-2006, 01:12 PM	#2
Moostang Senior Moderator Join Date: Apr 2005 Location: Cali-4 Nye-Aye? Posts: 1,377	Was that engine balanced with that flywheel? It could be one of the causes. __________________ MEOW!! http://moostangproductions.com

01-20-2006, 10:51 PM	#3
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,160	Is the vibration noticable with the truck sitting still and the clutch depressed, or just when driving? __________________ When i die, i dont want to walk gracefully thu the pearly gates and turn in a unused body. i want to go sliding thru sideways and turn in a body that has been completely used up.

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01-21-2006, 11:00 AM	#4
gmtech Senior Member Join Date: Dec 2005 Location: farmville Va Posts: 348	You might check with a parts store and see if the harmonic balancers are the same for an automatic and manual transmission, something tells me they are different.

01-27-2006, 06:23 PM	#5
Little Grub Junior Member Join Date: Jan 2006 Posts: 3	Thanks guys, I got thinking about it the other day and thought that the imput shaft may be bent were it rides in the pilot bushing, so I pulled the tranny and went and got a junk-yard five speed and that solved the problem. I sound kinda weird because even with the transmission in gear and the cluch pushed in it still vibrated because the pilot bearing was still spinning around the end of the imput shaft. It now works great and gets better gas milage! Thanks Again.