Third 6.4 Flexplate in 9 months - Ford Powerstroke Diesel Forum
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Old 04-23-2013, 01:12 PM
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Unhappy Third 6.4 Flexplate in 9 months

I have an 08 F-350 that I use for my business. It caries a daily load of about 6,000 lbs. I bought the truck with 130k on it and before I hit 133 the flexplate blew. Dealer replaced it and it lasted for about 6 months. In january I replaced it again. And now, it is blown again. The factory Flexplate looks like it came out of a Honda Civic. I want to upgrade but I would hate to spend $800 for nothing. What should I look for that could be causing this?

Thanks.
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Old 04-27-2013, 06:26 AM
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Have any pics of the blown flexplates?
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Old 04-27-2013, 06:46 AM
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They all look similar to this. This was the one put in sometime in June lasted to January. About 10k miles. The one that replaced this is still in the truck but only lasted 2500 miles.
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Old 04-29-2013, 04:27 AM
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I've seen this happen twice, both time for a good reason. Once the truck had been in a major accident and rebuilt. The second time the truck had broken a rod and the guy took it to a shop who suppossedly put a reman engine in it but instead, welded the hole in the block, replaced the rod and put his old engine back in it. Of course he didn't figure that out until the bottom end locked up and he pulled his to replace it with one of ours. Something is seriously out of balance or bent to keep breaking that.
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Old 04-29-2013, 04:58 AM
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^^ Like this guy said, it could be a number of things.

How's the torque converter look? It's not ballooned or anything?

Are we sure the bellhousing bolts are tight, the dowels are in place in the block?

A large contributing factor is misalignment, especially if someone's done a trans rebuild/engine replacement and missed putting a dowel back in.

Also, ensuring the correct flexplate is used is important. If the wrong flex plate was put in the truck the first replacement, the subsequent warranty replacements would also be wrong as the warranty is based off the part number from the last invoice.

Clear as mud? LOL.

Drop me a PM with the VIN in it, and I can pull OASIS and see if it had any warranty engine/trans removals before that first flywheel incident.
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Old 04-29-2013, 05:04 AM
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Front pump bushing in trans, if it's whipped it will contribute to this condition also, also checking crankshaft end-play at this point might be a good idea.
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Old 01-05-2014, 08:47 AM
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2000 Excursion 7.3 4r100 E4OD Flexplate problems

I have gone through two flexplates in the last month. The first lasted about a week or so. Thought perhaps it was defective so replaced it with another from a different parts supply store. This plate lasted a week or about 300 miles. Flex fits nice and snug to crank shaft w/ dowl in place. Bell housing good and tight to block. No issues aligning TC to Flexplate during reassembly. What am I missing? HELP!!!
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Old 01-05-2014, 07:33 PM
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Quote:
Originally Posted by KOKOPELLI View Post
I have gone through two flexplates in the last month. The first lasted about a week or so. Thought perhaps it was defective so replaced it with another from a different parts supply store. This plate lasted a week or about 300 miles. Flex fits nice and snug to crank shaft w/ dowl in place. Bell housing good and tight to block. No issues aligning TC to Flexplate during reassembly. What am I missing? HELP!!!

in your case. you might have a bad engine spacer ("http://goo.gl/aLFWwa")
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Old 01-06-2014, 06:12 PM
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This is caused from the engine and tran are not seated correctly.

Next time they do the fix make sure they power wash the back of the block and the inside transmission bell housing.
No dirt or oil or grease.

Look inside where the guide nipples go to ensure they are clean.

Buy new maybe arp bolts for bolts that hold the tran to the block.

After few weeks try to retighen these bolts.

Most likely the bolts are stretched or they are getting loose.
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Old 01-11-2014, 04:48 PM
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Was the transmission replaced prior to you buying the truck?
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