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Rebel tranny

Printed From: TheAMCForum.com
Category: The Garage
Forum Name: Transmission & Drivetrain
Forum Description: If it's between the engine and wheels, it goes here
URL: https://theamcforum.com/forum/forum_posts.asp?TID=39009
Printed Date: Mar/28/2024 at 6:35am
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Topic: Rebel tranny
Posted By: ramblinred
Subject: Rebel tranny
Date Posted: Apr/24/2012 at 11:01am
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? 
 
 
RamblinredEmbarrassed



Replies:
Posted By: 68rebelman
Date Posted: Apr/24/2012 at 11:07am
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.

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1968 Rebel 550 Convertible 290 V-8 1968 Rebel Machine Convertile 390 V-8 67 Ambassador convertible 401 V-8,AMO #2130


Posted By: ramblinred
Date Posted: Apr/24/2012 at 12:30pm
Thanks so much!


Posted By: 1970390amx
Date Posted: Apr/24/2012 at 1:37pm
And the flywheel is balanced different

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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: Rebel Machine
Date Posted: Apr/24/2012 at 7:29pm
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-


Posted By: farna
Date Posted: Apr/25/2012 at 5:06pm
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.


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Frank Swygert


Posted By: AMC instigator
Date Posted: Apr/25/2012 at 10:15pm
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


Posted By: 69amxman
Date Posted: Apr/26/2012 at 8:18am
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


Posted By: ramblinred
Date Posted: Apr/26/2012 at 11:40am
how much ? not counting shipping? please?


Posted By: 69amxman
Date Posted: Apr/26/2012 at 1:05pm
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


Posted By: carnuck
Date Posted: May/02/2012 at 8:23pm
Trans from the 290 won't last long on a 343 (they didn't do well with 290s either!)

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Posted By: ramblinred
Date Posted: May/02/2012 at 8:35pm
Originally posted by carnuck carnuck wrote:

Trans from the 290 won't last long on a 343 (they didn't do well with 290s either!)
 
What one would you suggest putting on there then?


Posted By: 69amxman
Date Posted: May/03/2012 at 11:44am
i still have the m11 and can try and work something out


Posted By: carnuck
Date Posted: May/04/2012 at 12:18pm
M11 or 12 unless you drive with an egg between your foot and the gas pedal.

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