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Rear end V8 vs. I6

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iowamc View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iowamc Quote  Post ReplyReply Direct Link To This Post Topic: Rear end V8 vs. I6
    Posted: Sep/21/2022 at 7:41pm
Adding to my previous post about the rear end in my '65 Ambassador screeching/slipping.

One of my options was finding a used one. Put out a wanted ad and a guy who has a '66 4 door Ambassador responded. Sounds like I could get the car for around scrap price. 

Problem is that his car is a 232 6 cylinder with a 3 speed manual. My is a V8/auto. Are the rear ends a direct swap? I thought I read somewhere the ends of the torque tube are different between an 8 and a 6. How about the gear ratio between an automatic and a manual?
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ramblinrev View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ramblinrev Quote  Post ReplyReply Direct Link To This Post Posted: Sep/21/2022 at 8:51pm
No. You do not want the 6 cylinder rear end.
You need a V8 (amc 20) rear.
74 Hornet Hatchback X twins (since 1977)
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384
70 AMX 360 4-speed (since 1981)
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FleetMaster View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FleetMaster Quote  Post ReplyReply Direct Link To This Post Posted: Sep/22/2022 at 7:03am
Actually you should see more about the car, it may be a model 20.  1966 AMC used a heavier drivetrain in the Marlin and i believe the Ambo even with the 6 for that year.  transmission and rear were V8 level duty, regardless of actual engine.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ramblinrev Quote  Post ReplyReply Direct Link To This Post Posted: Sep/22/2022 at 7:09am
That may be true, but chances are the ratio for a manual rear end is a good bit different from the automatic rear end.
74 Hornet Hatchback X twins (since 1977)
62 American Convertible (still worth the $50 I spent in 1973!) AMCRC #513, AMO #384
70 AMX 360 4-speed (since 1981)
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