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Member
Posts: 30
| While on the hoist it appears the rear axle is a sure grip with a 4:10 ratio Looks like this old Sierra wagon had towing in mind. Only numbers I can detect are 1141644
Any ideas? I'm not a MOPAR expert. Thank You Kindly |
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Veteran
Posts: 165
Location: christchurch New Zealand | Thats a very low diff ratio esp for an auto V8. |
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Expert 5K+
Posts: 9902
  
Location: Lower Mainland BC | .
The axle ratio is stamped on the pinion gear carrier. Mine (56 Dodge V8 Custom Royal Powerflite) was 3.54. There was a 4.1 but typically that was for manual transmission cars with over drive. That said, 4.1 might have been available as an option for hilly country.
Edited by 56D500boy 2022-12-02 2:29 AM
 (RearAxelRatiosAsAFunctionOfTheTransmission.jpg)
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 RearAxelRatiosAsAFunctionOfTheTransmission.jpg (180KB - 72 downloads)
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Expert 5K+
Posts: 9666
Location: So. Cal | A picture or two might help to identify. I say that because sure grip didn't come out until 1958, so whatever it is, it isn't stock. |
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Location: Under the X in Texas | While "Sure Grip" as a marketing label was on the option list for 1958, the same unit was available from introduction about mid 1957 model year and simply known for what it is: a limited-slip differential. Several Imperials and Chryslers and a few DeSotos are known to have been ordered with the option.
But, granted, 1956 Mopar axles are different in construction and dimensions. I don't know of any Chrysler products with limited slip prior to 1957.
" Packard pioneered the LSD under the brand name "Twin Traction" in 1956, becoming one of the first manufacturers. " https://gaukmotors.co.uk/post/limited-slip-differential-lsd |
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Expert 5K+
Posts: 8947
Location: WHEELING,WV.>>>HOME OF WWVA | Avanti - 2022-12-01 11:44 PM
While on the hoist it appears the rear axle is a sure grip with a 4:10 ratio Looks like this old Sierra wagon had towing in mind. Only numbers I can detect are 1141644
Any ideas? I'm not a MOPAR expert. Thank You Kindly
what leads you to believe its a sure grip? |
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Member
Posts: 30
| Thank you to 60 Dart, Powerfllite, 56D500boy and all who replied. I was wrong and confused. Using photo above and holding one wheel as suggested, I have a 3.54 open rear end (so marked) so a 8 1/4 rear end. Again, thank you again I appreciate it. |
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Member
Posts: 30
| Thank you to 60 Dart, Powerfllite, 56D500boy and all who replied. I was wrong and confused. Using photo above and holding one wheel as suggested, I have a 3.54 open rear end (so marked) so a 8 1/4 rear end. Again, thank you again I appreciate it. |
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Identity of rear axle: 1956 Dodge Sierra 270 V8 Automatic
