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Rebel tranny
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ramblinred View Drop Down
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Joined: Jun/28/2011
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    Posted: Apr/24/2012 at 12:01pm
Can you tell me please if a 290 CID  2v tranny out of a 68 sst fit on  a 343 motor 235 hp  out of a 68 rebel? 
 
 
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Points: 317 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 68rebelman Quote  Post ReplyReply Direct Link To This Post Posted: Apr/24/2012 at 12:07pm
It will fit but you will have to use everything from the motor back,Flywheel,bellhousing and transmission and drive shaft,the 343 is a cast iron transmission as where the 290 is a aluimin transmission.
1968 Rebel 550 Convertible 290 V-8 1968 Rebel Machine Convertile 390 V-8 67 Ambassador convertible 401 V-8,AMO #2130
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Thanks so much!
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Points: 1254 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 1970390amx Quote  Post ReplyReply Direct Link To This Post Posted: Apr/24/2012 at 2:37pm
And the flywheel is balanced different
1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box
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Points: 1469 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Apr/24/2012 at 8:29pm
They also use different flexplates and torque converters. The converter in the cast iron transmissions have 4-studs and use castle nuts, the converter in the aluminum transmissions use 6 bolts.
 
-Steve-
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Points: 7127 		Post Options Post Options   Thanks (0) Thanks(0)   Quote farna Quote  Post ReplyReply Direct Link To This Post Posted: Apr/25/2012 at 6:06pm
You definitely need a 343 flexplate. The flexplate is made to balance the engine. The 290 flexplate may work okay at idle and low speeds, but will most likely cause engine vibration at higher speeds. This can lead to main bearing failure.

As long as you take it easy on the car (just normal driving, few wheel burns and such) the M-40 transmission should be okay. Factory 290/4V cars came with the cast iron trans because the factory expected them to get rough treatment.
Frank Swygert
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Points: 954 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AMC instigator Quote  Post ReplyReply Direct Link To This Post Posted: Apr/25/2012 at 11:15pm
Yes it does, the 290 2bbl uses 4 bolts as well as the 343 to hook the convertor to the flexplate. Keep the original flexplate on the 343 as was mentioned to stay in balance, and then bolt the trans with its convertor to the engine and you will be hooked up and good to go. Hope that helps, SH
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Points: 120 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 69amxman Quote  Post ReplyReply Direct Link To This Post Posted: Apr/26/2012 at 9:18am
i do have a nice working m11 from a 343 amx for sale if you need one , valve body modified for nice firm shifts and has a 2000 stall converter that goes with it , problem shipping might be too much as this is in south dakota
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Points: 74 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ramblinred Quote  Post ReplyReply Direct Link To This Post Posted: Apr/26/2012 at 12:40pm
how much ? not counting shipping? please?
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Points: 120 		Post Options Post Options   Thanks (0) Thanks(0)   Quote 69amxman Quote  Post ReplyReply Direct Link To This Post Posted: Apr/26/2012 at 2:05pm
i really would like to see somewhere around 350.-400 for it , it was removed just last summer to put 5 speed in i do have about 5 or 6 quarts of tranny fluid that will go with the trans
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