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C6 to 351w Torque Converter

5.7K views 11 replies 3 participants last post by  timido  
#1 ·
Before you ask, yes i searched.

Last night i tried matting my SB 351w to the 85 C6 i obtained off of Craigslist. Everything went fine, and i got it matted up, however im not sure i did it right. I read about "seating" the torque converter into the C6. I got it in as far as i could by pushing and turning - but never felt the "clunk" however it was pretty far past the front of the bellhousing (inch or so) after about 30 minutes of fiddling with the tranny, i finally got it mounted and the torque converter studs lined up with the flywheel holes. My questions are, is there a specific way it has to go onto the flywheel? there are 3 different size holes, small, medium and large...the torque converter has studs that look like they should go through the medium size hole, so thats how i matted it up. How do i know 100% that i did it correctly? Finally, do i need to put nuts on the back of the flywheel, bolting the torque converter to the flywheel?? This is my first Automatic swap lol.
 
#2 ·
You should probably ask in ford tech not Jeep.
BUT, you need to make sure you have movement in the converter. meaning pry the converter back from the flexplate and back towards it, it should have some movement. If not than its not installed correctly.
Lastly, as long as the flexplate hole is the same size as the studs its ok, if the hole is larger, its wrong.
YES you need nuts on the converter.
 
#4 ·
any way you can get in there. even with a screwdriver. It wont take much, just to ensure that the flexplate is not jammed up against the converter
 
#5 ·
so there should be barely any room between the TC and the flexplate, yet you still have to have the studs through the flexplate and nuts on the back of them right??? Sorry for so many questions...lol, just want to make sure i dont mess up my tranny lol.. trying to make this dummy proof for myself.
 
#6 ·
the converter has to be bolted to the flexplate. But you need to make sure the converter is in the trans all the way. You should be able to pry the converter back from the flexplate, with out it bolted to it. If you cant, than its not in all the way
 
#7 · (Edited)
so i went out and fiddled with it for a moment. I can barely move the TC back, but not enough to move the studs out of the Flexplate. It moves about an 1/8th of an inch back and forth....is that what your talking about?? Here are some pictures so you can see what im talking about.
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What im going to do is crack the 2 apart again, make 100% sure the TC is seated all the way, then make sure i have the correct flexplate for the C6, and then ill mount them back up again. Going to be a PITA but i would rather do it this way and not worry then break the pump.

Thanks for working with me ct67 72!
 
#10 ·
i know the holes are matted up correctly, but just worried that its either not seated correctly, or i have the incorrect flex plate - i read somewhere that they have different dish depths etc...
im going to pull it apart this weekend, check to make sure i have the correct flex plate, then back on it goes.
 
#11 ·
so i pulled it apart, reapplied the TC to make sure it was seated. The problem i am having now is one of the studs on the TC. The first few threads are causing the nut to not want to screw on. Right now i have 3 of the 4 nuts screwed onto the TC and Flexplate....will that be enough?