MM 8 bolt Flexplate

musclemerc

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IIRC the 2000~2001 Mustang GT with an automatic came with an 8 bolt flexplate
 

musclemerc

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^^^ Correct, big shout out to Derek (95SC) he passed that info along to me and I was SET!!!

Sorry Bill for the highjack.....
 

Zack

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^^^ Correct, big shout out to Derek (95SC) he passed that info along to me and I was SET!!!

Sorry Bill for the highjack.....
Ford discontinued them about 2 years ago.
What do you know that we dont?
 

musclemerc

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Discontinued YES, impossible to find....

NO :burnout:
 

taemian

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This 8 bolt flexplate is SFI approved and verified to be correct for our cars stock TC or aftermarket TC to hook up to the 8bolt crank by JT @ Modularperformance.
http://www.summitracing.com/parts/PMA-PAX28111/
Be aware this is not a bolt up without grinding the holes into an oblong shape, and a fair bit of material needs to go. My shop couldn't believe the first one from Summit was the right part, so they sent another one during my forged/Teksid rebuild. Same exact thing with both flexplates.

Just my experience??
 

RacerX

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Hmmmm... I thought our stock convertors had a 10.5" bolt pattern. ??? Did they shave it towards the center or towards outside on the holes. Well, I'll find out this coming month.
 

Zack

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MM's have a 10.5" spacing. If you use a PI converter with dual bolt option, you can use a stock flexplate from a new 5.0 with an auto
 

RacerX

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I don't get it then... This is the PAX28111 flexplate:


 

taemian

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I don't get it then... This is the PAX28111 flexplate:


Beats me, that's what they told me though. Not sure which way the holes were ground, but they were not happy. Crank was from Cobra SVT as well, all specs checked out. My luck as usual with these one-off weird things...
 

RacerX

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Aight, I'm not crazy! I just pulled my engine yesterday, pulled off the original flexplate to put it on the engine stand when I got out of work tonight then remebered this thread. I laid them on top of each other and the new plate has 4 converter holes that perfectly match up. I wonder if you got the wrong one sent.
 

huh?!

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sweet. this is what i need to know!
 

Zack

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Bill, the flexplate you posted a pic of looks similar to the one I had that had the wrong backspacing.
Look and measure before installing!
 

huh?!

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What should the back spacing be? I'm headed to check out a few off of 04-06 f-150s right now. I understand the 8 bolt and 10.5 inch bolt patten and info on backspacing measurements would be helpful.
 

Zack

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What should the back spacing be? I'm headed to check out a few off of 04-06 f-150s right now. I understand the 8 bolt and 10.5 inch bolt patten and info on backspacing measurements would be helpful.
Wish I could help but not until later. Measure your 6 bolt flexplate! :wavey:
 

RacerX

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Zack, you are right buddy. I saw it and it was making my spidey sense tingle. Until you said something though, I didn't fully realize. :bigthumb: I have a spacer I'm making for it. I'm not going to measure between the teeth and the ctrank mating surface, but, the crank mating surface and torque convertor mating surface. Nice catch!
 

Zack

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Zack, you are right buddy. I saw it and it was making my spidey sense tingle. Until you said something though, I didn't fully realize. :bigthumb: I have a spacer I'm making for it. I'm not going to measure between the teeth and the ctrank mating surface, but, the crank mating surface and torque convertor mating surface. Nice catch!
Think long and hard about what is in bold and let me know if you change your mind. :bowrofl:
 

RacerX

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Think long and hard about what is in bold and let me know if you change your mind. :bowrofl:
Washers on the TC bolts... You made me think about it sooner damn you! :bowrofl:
Hey! You said your flexplate pushed INTO the convertor meaning it was wider horizontilly along the crank axis. Right? Mine is actually shorter along that axis.
Yes, I will... measure, measure, measure...
 

huh?!

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Wish I could help but not until later. Measure your 6 bolt flexplate! :wavey:

That would be the most accurate way to do it but the marauder flexplate is still on the car! Wasn't sure if anyone had their marauder 6 bolt plate laying around for the backspacing measurement.

It rained a bunch here yesterday so I didn't actually make it out to the bone yard. Actually, the more I think about it, this can be one of the last pieces assembled...I'm concentrating more (and learning as much as I can) on the cam swap right now.
 

Zack

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Drop a straight edge on the teeth of the flexplate, then use a caliper to measure the distance from the bottom of the straight edge to the surface of the flexplate with the converter holes.
 

RacerX

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Well, just a quick check shows that the original MM flexplate has three steps on it and is higher than the new 8 bolt with two steps. I need to put washers on the TC bolts before I put the engine in so it doesn't pull the convertor too far forward. Either that or like I said earlier, some sort of spacer between the crank and flexplate. Or, I just look for a new flexplate. Tymensky did say this one will work, but, obviously there are differences. :picard:

 

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