flywheel to convertor holes not lining up??? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 06-01-2003, 03:32 PM
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Post flywheel to convertor holes not lining up???

hey, just put a new engine in my truck but noticed the holes for the flywheel and convertor are not lining up properly. it's a chevy 350 engine and th350 tranny with a stock convertor. I'm not far off, just far enough.. can i elongate the holes on the flywheel slightly and bolt it up? just noticed that this was done on the flywheel from the 305 that was removed? why would this be like this and can i do this without any problems???

Steve

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Old 06-01-2003, 05:45 PM
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Might be a better idea to get the correct flywheel instead...? Use the multi-pattern for a 350 and you will also get the correct depth set for the converter engagement... Otherwise you may not have this...?
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Old 06-01-2003, 05:52 PM
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was not aware there are different flywheels. I knew there were different sizes, but shouldn't all the bolt holes be in the same place? i mean all 350 flywheels should bolt up to a th350 torque convertor, correct??

Steve
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Old 06-01-2003, 06:57 PM
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Are the blocks different? 1 piece rear seal vs a 2 piece rear seal
They each use different flexplates. Maybe thats why it wont fit.
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Old 06-01-2003, 07:10 PM
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nope...both blocks used 2 piece rear mail seals
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Old 06-01-2003, 07:21 PM
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In answer yes their are 2 different bolt patterns for them... The newer flexplates have both patterns... This is only in the 168 tooth version I think...? Not sure on the smaller
one...

This applies to both one piece and two piece rear main seal type blocks...

[ June 01, 2003: Message edited by: Bumpstick ]</p>
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Old 06-01-2003, 07:47 PM
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can the bolt holes be elongated slightly? to replace the flywheel i would have to pull the engine again, which is not easy in an s10

Steve
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Old 06-01-2003, 08:08 PM
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They can but as I stated before make sure of the engagement of the converter into the front pump... This distance is critical in most apps... Also is it not possible to unbolt the transmission and move it back 1-1 1/2 inches and then change the flexplate...? I know in an S10 app this distance might be somewhat close but also remember this is an area that needs to be right and not forced or modded to much of any extent...?
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Old 06-01-2003, 08:53 PM
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i have the same problem. i have a 1974 454 with a 1998 flywheel and a 1974 TH400. i bought a 2800 stall and lost the box before i tryed to install it, but the holes were not even close. i sense got rid of the car that i was putting it in and still have the motor on the stand waiting for another car to put it in, but i will have to cross that road one day. what flywheel should i use?
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