355z28

iTrader: (8)

I noticed a lot of noise coming from the torque converter area. I pulled the transmission and luckily I got to it before it exploded. I just dont understad, i torqued them in sequence and to spec. Wondering if Its a freak deal and do another OEM one, or upgrade to a tci?

$O$OE

iTrader: (14)

thats what exactly happened to mine.....making noise like a maniac...

camar0corey

iTrader: (22)

There are threads on here of stockers doing this. I thought the LS1 guys had a lot of trouble with them? Search the whole site, not just the LT1 section, I'm sure you will find more.

355z28

iTrader: (8)

I did, it looks like a couple of years of the ls1s had problems. The reason Basically im trying to decide if i need to upgrade, the flexplate I broke was a year old and was under warranty but if this is a common problem ill just upgrade.

the_merv

iTrader: (88)

I've seen that happen, with alot of SBC 350's..they just crack.

$O$OE

iTrader: (14)

If its still under warranty just get it done, the one i broke was the original one for my car

fergymoto

iTrader: (129)

I had one crack in a circle around the bolt holes before. Luckily I caught it before anything happened. It was not making any noise either.

daniel6718

iTrader: (36)

get an aftermarket...common problem and you can lose a foot over it...

355z28

iTrader: (8)

alright, this ones under warranty right now. Ill go ahead and get another one of these, but this winter when the engine comes out again I think ill go with the summit sfi approved one.

flyinZ

iTrader: (15)

Mine did that too. I upgraded. "always upgrade, never replace."

Formula350

iTrader: (3)

Geeze, makes me wonder if I have the stocker on mine or not. I know my motor has been yanked before, as well as the tranny, but who knows :\ I won't be able to check for a long time, and by then I'll forget So I just cross my fingers now and hope it's not factory Hopefully I'll remember to at least look when I get around to putting my trans back in!

My96z

iTrader: (5)

That happened to the stocker on my turbo van, I went to autozone and the replacement was a tad beefier thant the stocker.

blk/slvr02ss

iTrader: (21)

Flex plates have been breaking like that for a long time now.Most people w/ that problem think they have spun a bearing or have blow there motor.

Beaflag VonRathburg

iTrader: (176)

Speed Inc has an SFI approved one for $120 if I remember correctly. It has the provisions for 4l60e and TH transmissions. It's a great price if you compare it to the TCI one.

Fire67

iTrader: (3)

If the crank bolts were all tight... Your bellhousing to block bolts probably were not. That's the only way I've ever seen them crack. And I've seen it quite a bit.

355z28

iTrader: (8)

well..I tightened the bell housing bolts with a 1/2 inch mac impact. And all of the crank bolts were tight. I just think it was a weak flexplate like most. Ill just have to upgrade.

Not saying your wrong. That probably is a cause of a lot of them. Just wasn't the case for me! thanks for the input!

Beaflag VonRathburg

iTrader: (176)

You shouldn't have used an impact. You should have used a torque wrench. Did you use a torque wrench on the flywheel bolts or the impact?

355z28

iTrader: (8)

no no lol i would never use an impact on the flywheel bolts. I use the impact and a long extension for the bell housing bolts.

the_merv

iTrader: (88)

Never seen that happen with an Auto.. the Stall usually holds the other half..

crookedbowtie

I cracked one on a 383 stroker/700R4 combo once after a high rpm thrash. Blew the nose off the starter next time I tried to start it, and cracked the outside bolt hole in the block. Couldn't ever start it after that because the starter would deflect even after replacing the flex. Done with autos!