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Flexplate or billet input??

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Old 10-03-2006, 08:40 AM
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Flexplate or billet input??

I'm getting a Suncoast either this week or next and I'm going with their Extreme Duty rebuild kit, 91% TC, and either the Flexplate or the Billet input shaft. Which one do yall think will break first with about 450hp? Jeff Garmon wants me to get the Flexplate, but if my stock input shaft breaks and screws up my TC then it will not be covered under warranty.

What do yall think?
Old 10-03-2006, 09:14 AM
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I would get the input for the same reason, but that's just me. I haven't heard of too many flexplate breaking at 450hp.

Have Jeff explain why he thinks the flexplate is the way to go. I would trust his judgement.
Old 10-03-2006, 09:23 AM
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If I bought the Flexplate later down the road would I need to drop the whole tranny or could I just unbolt it and wiggle my hands in there to change the stock one out?
Old 10-03-2006, 09:27 AM
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What are you mainly going to be doing wih your truck?
If it is trailer pulling, I suggest against the 91%.
Old 10-03-2006, 09:46 AM
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I don't pull a trailer hardly at all, but If I do pull a trailer it'll be light, nothing heavy at all. Also some hot rodding and daily driving of course. My goal is about 450hp or so.
Old 10-03-2006, 09:55 AM
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Ok, because I have a 91%, and it is too tight for pulling heavy, I think, anyways.
Old 10-03-2006, 10:45 AM
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Under normal driving with the occasional hot rodding you would be more likely to break a flex plate than the input shaft. Now if you are taking your truck to the track I would reccomend doing both of them.
Old 10-03-2006, 04:08 PM
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Originally Posted by kantdrive55
Under normal driving with the occasional hot rodding you would be more likely to break a flex plate than the input shaft. Now if you are taking your truck to the track I would reccomend doing both of them.
i agree.... i went ahead and bit the bullet and did it all when i did mine... it's easier to spend the extra cash and get the flexplate and inputshaft than to have to remove the tranny to install either later on..... not to mention you won't have to wander "if" or "when" something will break....
Old 10-03-2006, 04:20 PM
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Originally Posted by Marine
Ok, because I have a 91%, and it is too tight for pulling heavy, I think, anyways.
It would do better with more HP. You are proabaly around 325-350 with your setup currently, another 100 and you would love it
Old 10-03-2006, 04:44 PM
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If not both i would go with the Billet input shaft, if your gonna wanna do some launches or a lil powerbraking, i know alot of people who have made big power and had billet shafts but a stock flexplate.
Old 10-03-2006, 07:05 PM
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If you can possibly afford it at all, go ahead and do them both. If you cant, i'd say go ahead and get the billet input. Ive heard some horror stories about what a broken input shaft can do to the rest of the tranny
Old 10-04-2006, 01:43 AM
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INPUT! I would way rather have a billet input than just the flexplate. I hope to be able to do both when I do mine(hopefully a ways down the road)

Eric
Old 10-04-2006, 10:41 AM
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When flex plates break they don't cause near the damage as an input.

Splintered inputs take out converters, pumps and contaminate the trans.

All the parts the input has potential to take out with it are very costly.
Old 10-04-2006, 10:46 AM
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I wouldn't have a 91 converter for anything. I love my 89 and would like for it to be a little softer. Don't get the Suncoast flex plate - they really don't look like $400 to me. Went with ATS myself. That input shaft is a must - spend that money and never look back. If you break that because of not replacing it, you'll really hate that bill.
Old 10-04-2006, 10:48 AM
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I know what you mean about the 91%. I should have went with the 89%. Maybe they'll give me a partial trade in on mine.


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