flywheel spins, engine does not.
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New User
Joined: Dec 2007
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flywheel spins, engine does not.
Hi. I have a 91 1 ton with an auto transmission. The starter turns the flywheel but not the engine. D o I need to remove the tranny to see what is going on? Any ideas?
Lead Driver
Joined: Feb 2002
Posts: 7,970
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From: Greater Austin, Texas
Uh, if you are sure the flywheel is turning, then you have a broken crank. Are you sure the starter gear is engaging the flywheel? If not then you would get a real fast "wheeeeeeeee" noise from the starter but the engine would not turn.
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New User
Joined: Dec 2007
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I had it in the shop a year ago and they had the tranny out for a rebuild. I was driving down the highway and the rpm's started jumping around. I pulled off and it wouldn't engage in any gear. I shut it down to check tranny fluid leaks and level which were good. When I went to start it again the starter would just spin the flywheel but wouldn't crank the engine.
Freshman User
Joined: Jul 2008
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i would be seeing them real soon.
do you have your paperwork? did they replace a rear main seal? maybe the bolts were not torqued and sheared the bolts off.
do you have your paperwork? did they replace a rear main seal? maybe the bolts were not torqued and sheared the bolts off.
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I no longer have the paper work, and I do not know if they replaced the rear main seal or not. Wouldn't the crank spin if the flywheel was spinning?
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Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
I have heard of the flex plate hub breaking loose from the flywheel.
So the problem may be you new a new flex plate (flywheel), and the hub is still bolted to the crank like it should be.
So the problem may be you new a new flex plate (flywheel), and the hub is still bolted to the crank like it should be.
Freshman User
Joined: Jul 2008
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[quote=Dave Sponaugle;7191297]I have heard of the flex plate hub breaking loose from the flywheel.
So the problem may be you new a new flex plate (flywheel), and the hub is still bolted to the crank like it should be.[/quote
i'm sure that's it.
does it have a 2 piece flywheel with flex plate like on the 6.9? not sure i have only had a 6.9 with automatic apart.
if so the converter should be still connected to the crank?
none the less, transmission out and a junk yard item to fix.
So the problem may be you new a new flex plate (flywheel), and the hub is still bolted to the crank like it should be.[/quote
i'm sure that's it.
does it have a 2 piece flywheel with flex plate like on the 6.9? not sure i have only had a 6.9 with automatic apart.
if so the converter should be still connected to the crank?
none the less, transmission out and a junk yard item to fix.
i ain't rite
Joined: Mar 2005
Posts: 65,579
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From: Marlboro Mental Hospital.
there is a small plate that is supposed to be mounted on the outside of the flex-plate to prevent the flex-plate hub from cracking. if this was not put back on when the flex-plate was removed, the hub will break off the plate, causing the symptoms you are describing.