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06-12-2007, 12:51 AM | #1 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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what does a cracked flywheel sound like
i have been having a metal on metal contact sound coming from the flywheel area. its louder in the beginning of a gear and lightens up and then gets loud as it shifts into the next gear. is this a cracked flywheel sound?
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
06-12-2007, 01:12 AM | #2 |
72 chevy
Join Date: Jan 2007
Location: Central Il
Posts: 725
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Re: what does a cracked flywheel sound like
Pull the cover and make sure its not the torque converter bolts if there tight you should beable to look with a flashlight and see a crack around the crank.
Ed |
06-12-2007, 04:32 PM | #3 |
Registered User
Join Date: Feb 2004
Location: northern, in
Posts: 350
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Re: what does a cracked flywheel sound like
a cracked flexplate sounds like a lower end knock, ive heard some that sounded like main bearings,others sounded like rods. TC bolts typically sound like rods.,
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06-12-2007, 07:16 PM | #4 |
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Join Date: Nov 2004
Location: Roanoke, AL
Posts: 18
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Re: what does a cracked flywheel sound like
I agree. Mine sounded like a rod knocking, so I got a crate 350 to replace a 305. After removal flexplate was cracked at crank bolts. Anyway, I got a 350.
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06-13-2007, 12:30 AM | #5 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
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Re: what does a cracked flywheel sound like
well i got under the truck and inspected it with a flashlight. i couldnt see any cracks, however it might be cracked around the crank and not the bolts.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
06-13-2007, 12:44 AM | #6 |
GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: what does a cracked flywheel sound like
I agree, I have heard them sound just like a rod knocking.
Hope you get it figured out. RJ22... |
06-13-2007, 01:21 PM | #7 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
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Re: what does a cracked flywheel sound like
it sounds like a dryer with a hand full of pennies. it is loudest at the beginning of each gear.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
06-13-2007, 09:33 PM | #8 |
Dirteh Kitteh
Join Date: Nov 2006
Location: Mormon country
Posts: 2,484
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Re: what does a cracked flywheel sound like
Are you sure it's the transmission? I've heard pebbles in the catalytic converter heat shield described as you have.
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Darrin 1955 Willys CJ-5 all original and the oldest CJ-5 on the road. 2001 Dodge Neon (wife's car) 1995 Jeep Grand Cherokee Limited Edition SOLD 1981 K15 Custom Deluxe 4X4, rusty but trusty wood hauler. SOLD 1993 S-10 4X4 Tahoe SOLD Sign up with the Contact List RIP ESLL |
06-14-2007, 01:20 AM | #9 |
Alright Alright Alright
Join Date: Mar 2004
Location: Midland, Texas
Posts: 1,672
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Re: what does a cracked flywheel sound like
i dont have any emissions stuff. my truck is a 72 cheyenne.
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1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies |
06-17-2007, 09:57 PM | #10 |
Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: what does a cracked flywheel sound like
Maybe broken vain(s) in the torque convertor?
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1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI |
06-18-2007, 02:30 AM | #11 |
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Join Date: Apr 2007
Location: Visalia, CA.
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Re: what does a cracked flywheel sound like
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68 c-10 1/2 ton swb fleetside, 79 GMC Sierra Grande 1/2 ton swb fleetside, 99 Dodge Durango 4x4(wifes ride),53 and 55 chevy trucks(dads trucks ) 54 caddy 62 series 4 door(younger sons ride, aka 54caddy ) 70 caddy 2 door, 89 chevy silverado stepside(older sons rides ) |
06-18-2007, 03:20 PM | #12 |
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Join Date: Dec 2005
Posts: 114
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Re: what does a cracked flywheel sound like
had the same problem with my jeep thought it was carbon balls in the cat so i took my handy dandy angle grinder and removed it for some reason I couldnt find any wrench or socket that would fit the bolts. anyway got it put back together without the cat and still had the noise. pulled the trans one day to fix a leak got to looking around and found the crack.
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