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Flex Plate ID

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SC397 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SC397 Quote  Post ReplyReply Direct Link To This Post Posted: Jun/02/2011 at 10:16pm
On the left is a flex plate for a 360 with the TH400.  On the right is a flex plate for a 401 with the TH400.  No weight on the 360 (except for the little round riveted tubes) and a 1' x 2 1/4" weight on the 401flex plate.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote mopar63 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/02/2011 at 3:56pm
just wondering if you guys can help out before I go to far with this, pulled out my 343 last night, I'm putting in a recond 4v 290, the flexplate I have with the 290 has 6 holes  and is smaller than the old 343 one which has 4 holes ,luckily I got the convertor with the 290 and it seems to go into the 343 trans ok ,looks like both transmissions I have are M11's, question, are the 290 converters supposed to be smaller by a few centimetres  in diameter?if all seems right I'll keep on moving with the transplant,cheers
'68 Javelin sst 343

'69 AMX project car

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Post Options Post Options   Thanks (0) Thanks(0)   Quote mopar63 Quote  Post ReplyReply Direct Link To This Post Posted: Aug/02/2011 at 4:01pm

both transmissions are cast iron  with oval tags so assuming they are m-11's



Edited by mopar63 - Aug/02/2011 at 4:06pm
'68 Javelin sst 343

'69 AMX project car

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carnuck View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote carnuck Quote  Post ReplyReply Direct Link To This Post Posted: Aug/04/2011 at 1:04pm
Do a spline count to be sure
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PHAT69AMX Quote  Post ReplyReply Direct Link To This Post Posted: Sep/01/2011 at 12:01am
Pictures saved off the web, unable to give credit as to who's they are....
Difference in size of balance weight is visible in the pics,
not a huge difference, but different.
 
1972 & Up AMC 360 with TourqueFlite Trans
 
 
 
1972 & Up AMC 304 with TorqueFlite Trans
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote carnuck Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2011 at 11:22pm
Originally posted by SC397 SC397 wrote:

On the left is a flex plate for a 360 with the TH400.  On the right is a flex plate for a 401 with the TH400.  No weight on the 360 (except for the little round riveted tubes) and a 1' x 2 1/4" weight on the 401flex plate.



Just to go a little further with this. These plates are for '74 to '79 TH400. (the earlier one used with a nailhead trans and adapter ring is different) The "mustache" cut out of the plates IS the balance weight! On the 6 cyl it's cut out all the way. The 401 plate was rebalanced from a 360 plate. The actual factory 401 plate has a very skinny mustache without the "undernose" divot. 304 flexplate has a bigger mustache (smaller weight offset)

304 flexplate to TH400 (almost brand new)



Here's the TH400 to 327 flexplate on the motor



and the adapter ring





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Post Options Post Options   Thanks (0) Thanks(0)   Quote american hellbilly Quote  Post ReplyReply Direct Link To This Post Posted: Dec/20/2011 at 5:07am
I am reinstalling my flywheel on my 77 360/TF904 and was wondering which direction the flywheel goes. dish in or out?

Edited by american hellbilly - Dec/20/2011 at 5:09am
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SC397 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SC397 Quote  Post ReplyReply Direct Link To This Post Posted: Dec/20/2011 at 8:39am
Dish away from the engine
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Post Options Post Options   Thanks (0) Thanks(0)   Quote american hellbilly Quote  Post ReplyReply Direct Link To This Post Posted: Dec/23/2011 at 12:28pm
How do I figure out which hole is the offset hole on the crankshaft? Does the ring/washer go between the flywheel and crank or flywheel and trans
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SC397 Quote  Post ReplyReply Direct Link To This Post Posted: Dec/23/2011 at 1:22pm
The flex plate will only line up one way with the holes in the end of the crank.  You have to put it on the crank and keep spinning it around until all the bolt holes line up.  The flex plate goes on the crank shaft first, ring/washer goes on the flex plate, the bolts go through the ring/washer then through the flex plate.
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