Flexplate

[RacerX]

This has both TC bolt patterns, is SFI approved and is for 8 bolt cranks. Am I missing something or is this a good replacement for an 8 bolt crank and our stock convertors?

http://www.mustangsunlimited.com/itemdy01.asp?T1=PA264788+01&Category=Drivetrain&subCategory=Flexplates&CatKey=74-01

http://www.summitracing.com/parts/PMA-PAX28111/

I'm shopping for myself and that's why I ask. I would rather not drill out a FRPP M-6375-H46 if I don't need to. Thanks for any input.

[MOTOWN]

great find modular performance says it will work

[RacerX]

Good to know! If JT says it's good, it's good! :beer: I'll be buying one in a bit and keep this updated.

[RacerX]

Got it! $115 shipped BNIB because I'm freakin cool like dat! ;)
PAX28111

http://www.mercurymarauder.net/gallery/data/579/IMG_0522a.jpg
http://www.mercurymarauder.net/gallery/data/579/IMG_0523a.jpg

[JoeBoomz]

I just ordered the PMA-PAX28111 from Summit and it doesn't fit the 8-bolt crank on an 04 Cobra engine. AND it doesn't fit the Marauder TC. Whut gives?

Here's how it comes:
http://images.ioncross.com/mercurymarauder.net/08-08-2013-PRI FlexPlate/IMG_5807.JPG

Needed to drill out two of the center holes to make it fit the crank. Needed to drill 4 new holes to fit our TC.
http://images.ioncross.com/mercurymarauder.net/08-08-2013-PRI FlexPlate/IMG_5805.JPG


Here's the two side by side:
http://images.ioncross.com/mercurymarauder.net/08-08-2013-PRI FlexPlate/IMG_5808.JPG


Who has successfully used these flex plates without issues? Or is everyone drilling holes to make them fit?

[MOTOWN]

I have one on my Aluminator with a Circle D converter , it fits perfectly.

[RacerX]

JOE! I never updated this thread properly. I posted here after I found out something else about this: http://www.mercurymarauder.net/forums/showthread.php?t=67715&page=3&highlight=flexplate

Post #38

[JoeBoomz]

So where do I get a working flex plate? Cobra long block users, what did you end up doing?

[RacerX]

Joe, from my searching, it looks like the cobra guys going from manual to auto are using this flexplate without probs. I know there's a little lateral play in the TC. Not positive though. I ended up using TripleThreat's 8 bolt MM one.

[Blown3.8]

I think you can use a ford truck one from a windsor motor. I think its the windsor that had the 8 bolt crank. They used to have it listed in the ford racing catalog.

Did you spin the flexplate around the crank to get those bolts to line up? You definatly shouldn't have had to drill the crank holes out. I have had to drill new converter holes in a couple flex plates tho.

[JoeBoomz]

Spun it around makes no difference unfortunately. Two of the bolts (exact opposite sides of the crank) are off by 1/8 of an inch. If that. Less than a mm for us Canadians.

My motor is arriving sometime early next week so we have a second one to compare to. It's possible that the crank was changed in the one dad got and we don't know it.

[JoeBoomz]

This thread needs an update in case someone gets stuck like I did with this flexplate:

http://images.ioncross.com/mercurymarauder.net/08-21-2013-JOEBOOMZCobraMotor/P1010548.JPG


I emailed PRW directly late SATURDAY NIGHT. I advised them that we had two of their flex plates, purchased a year apart from different vendors, neither of which fit on two separate 04 Cobra motors.

On SUNDAY MORNING I had a reply in my inbox from PRW, asking for some photos of the plates, including their stamps and stickers. I replied and by SUNDAY AFTERNOON I had the following email back from them:


Hi Joe,

Thanks for sending the photos. The stamping mould used to produce this part is a “compound” mould that is also used for the 6 bolt Ford application. One of the flexplates that you have are 2011 production and the other 2012. Very strange.

The QC Team identified a short run of crankshaft bore holes that were not concentric and were impounded and later destroyed. Some of those were Production Date Code (PDC): QDF1111. It appears that you received one that slipped through the system.

The other flexplate PDC: QDI1712 is unique to my knowledge. Murphy’s Law was really working overtime for you to get two of these from different distributors produced over a year apart!

I will instruct our QC Manager to complete a random sampling tomorrow to check the most recent production.

1. What is the timetable for your other Cobra build and flexplate installation?
2. Do you need the same torque convertor bolt pattern for the other flexplate?
3. Let us know and we will find a resolution for you without any additional shipping or machining costs.

Thanks for taking the time to advise us. I am very sorry for any inconvenience. Have a great weekend and will contact you again later this week as details unfold.



I am blown away by the terrific response from PRW. It's rare to see a company so honestly take accountability like this these days :beer:

[MOTOWN]

Man go figure! luck of the draw!

[RacerX]

Out of curiosity, did you try rotating it to see if at one point they do line up? My 8 bolt flexplate and new Eagle 8 bolt crank were just like that until I rotated it to the right spot where all 8 lined up. :beer:

[justbob]

Out of curiosity, did you try rotating it to see if at one point they do line up? My 8 bolt flexplate and new Eagle 8 bolt crank were just like that until I rotated it to the right spot where all 8 lined up. :beer:

Same here for my flywheel.


Self proclaimed Builder Of Badassery.

Buy it, Break it, Build it BETTER.
"Since 2004"

[MOTOWN]

Yeah i had to do the same with my PRW flexplate

[JoeBoomz]

PRW sent us two brand new 8-bolt flex plates at absolutely no charge. The fitment is perfect:

http://images.ioncross.com/mercurymarauder.net/09-05-2013-Cobra Motor/IMG_6121.JPG


http://images.ioncross.com/mercurymarauder.net/09-05-2013-Cobra Motor/IMG_6122.JPG

PROBLEM SOLVED, THANKS PRW!

[MOTOWN]

Great when a company steps up and admits their mistake instead of telling you to "reassemble it"