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Flex Plate ID |
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american hellbilly
AMC Apprentice Joined: Aug/13/2008 Location: seymour, IN Status: Offline Points: 186 |
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Thanks for the info. |
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american hellbilly
AMC Apprentice Joined: Aug/13/2008 Location: seymour, IN Status: Offline Points: 186 |
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Ok I have two more questions... Will the flywheel bolt on backwards, or is there only one way for it to bolt up? I was half awake when I asked the direction and turned my brain around, Does the counterweight go inside or outside? That is what I should have asked in the first place. I'm asking because I can bolt it straight up with no issues with the counterweight facing out.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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You are in luck, it is hellbilly proof! No, you can not bolt the flex plate on backwards. (I just tried it) There is no position where all of the holes will line up when it is flipped the wrong way.
The counter weights on the 904 & 727 are on the side that faces the transmission. The counter weights on the TH400 and Borg Warners face the engine side. |
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carnuck
AMC Addicted Joined: Mar/31/2010 Location: Seattle Status: Offline Points: 3942 |
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The TH400 has 3 converter bolts and the 727/9XX have 4
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Got an Eagle?
http://forums.amceaglesden.com |
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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Here is a 343 flex plate along side a 1970 390 flex plate for the M11/M12 Borg Warner Automatics. The weight on the 390 flex plate is .213" thick x 3.75" long x 1.375" tall. With the exception of the one torque converter mounting hole, the series of holes were put in there from the factory to balance it to the crank. All AMC engines were individually balanced. If you are swapping flex plates, flywheels or, vibration damper, (even on the same displacement engine) the assembly should be re-balanced.
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raysinvegas
AMC Addicted Joined: Jul/01/2007 Location: Las Vegas NV Status: Offline Points: 2501 |
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I'm having a similar issue. Did the 290 ever come with an M11? Can I bolt the 290 and M11 together with the flex plate and converter from the M40?
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Andy Ray
64 440H 64 440 Convertible 68 Javelin SST 343 69 Javelin SST 343 69 SC/Rambler |
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carnuck
AMC Addicted Joined: Mar/31/2010 Location: Seattle Status: Offline Points: 3942 |
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I noticed some of the pictures (including mine) disappeared from this thread.
I have a 290 flexplate from a '69 but what is the (30) quotation below about? NOTE: Is the early 6 cyl the same bolt pattern as later ones? I need to balance the nailhead TH400 flexplate for my 290 from the flexplate above and need something zero balanced to do it (early crank would work) Otherwise I will have to drill the center hole out and ruin a perfectly good 290 plate.
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Got an Eagle?
http://forums.amceaglesden.com |
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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Here is the V8 904/727 flex plates all lined up. Note that in a earlier post there is a second version of the 304 flex plate with a curved weight.
The dimensions of the rectangular weight version for the 304 is 1"x 2 3/4" the 360 weight is 1"x 3 1/8" and the 401 weight is larger curved one. The 6 cyl flex plate not pictured has no weight at all. Edited by SC397 - Mar/16/2014 at 7:54pm |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5903 |
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carnuck,
The (30) notation indicates which "Series" the part and part number applies to or not. "Series" being "Model" in AMC speak I reckon. Series "30" was the AMX. The 1st digit of the "Series" number is reflected in the 4th digit of the VIN and also shows up as the 2nd two digits in the "Model" Number stamped on the door tag, preceded by the 1st two being the model year. They go over it in the '69 TSM in Section 16 on page 16-4.
Unaware why the 290 in the AMX would have a different Flexplate than the one used with the 290 in other models. Edited by PHAT69AMX - Mar/13/2014 at 10:10am |
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raysinvegas
AMC Addicted Joined: Jul/01/2007 Location: Las Vegas NV Status: Offline Points: 2501 |
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The 290 in the AMXs was the ONLY 290 that was bolted to a cast iron BW M11. That flex plate is nearly impossible to find as there were only about 300 290/auto AMXs built.
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Andy Ray
64 440H 64 440 Convertible 68 Javelin SST 343 69 Javelin SST 343 69 SC/Rambler |
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