jerrybev Posted May 23, 2021 Share Posted May 23, 2021 hi Restorers like to use these housands to speed up their old vehicles going down the highway. Numbers shown in picture 3. I believe it was removed for use either in a 1960s mustang or for use in a 1947-1959 chevy truck. Can anyone verify what it will fit or what brand and type vehicle it came from? can anyone please confirm anything about this housand? See the numbers in the casting. Are there any additional part numbers usually on the underside? I have not cut the wires that are holding it securely on its base. Thank you for any help. sincerely Jerry Whitfield winston salem NC 336-749-5922 jerrybev1@yahoo.com or answer here. thankyou Link to comment Share on other sites More sharing options...
1912Staver Posted May 23, 2021 Share Posted May 23, 2021 Ford for sure, so probably from the Mustang. Fits lots of Fords from this era. Not very valuable unless it is a " posi / limited slip " type differential. It's a 1966 and older 8" housing , so nothing very exciting unless limited slip. If you have any axles handy insert them into the side gear splines, if they turn in opposite directions with the drive shaft yoke stationary its non limited slip. Otherwise hold one side gear stationary and turn the driveshaft yoke, if the other side gear turns backwards to what the main gear and diff housing turns also non limited slip. Link to comment Share on other sites More sharing options...
Laughing Coyote Posted May 23, 2021 Share Posted May 23, 2021 The casting number indicates it's a 1962 differential. https://automotivemileposts.com/ford/fordpartnumbers.html Link to comment Share on other sites More sharing options...
jerrybev Posted May 24, 2021 Author Share Posted May 24, 2021 martin: thank you. I found the Ford numbers which I am attaching in 2 photos. Numbers seem to be? C40W4218 A? Can you p lease view the numbers and see if you can decode these numbers for me? thank you Jerry Whitfield Link to comment Share on other sites More sharing options...
Laughing Coyote Posted May 24, 2021 Share Posted May 24, 2021 The housing is a 1962. The ring gear is a 1964, the 0 or O is Fairlane, W is transmission, axle, drive line engineering, then part number, and A is original design. I attached a link in the previous post for you. Link to comment Share on other sites More sharing options...
1912Staver Posted May 24, 2021 Share Posted May 24, 2021 (edited) But bear in mind that 1962 date is simply when that type of casting was introduced. As far as I know that design remained in production up to 1966. You have to find the casting date and decode it to figure out when that particular casting was poured. The date code is much smaller and of a different form than casting numbers. Lots of further info on google . The link you have provided Coyote spells this all out. Ford would continue to use the same casting numbers right up until a change to the actual casting was required and then the casting number would change. The same castings were often used for several years with no change in the casting number or part number. Edited May 24, 2021 by 1912Staver (see edit history) 1 Link to comment Share on other sites More sharing options...
jerrybev Posted May 24, 2021 Author Share Posted May 24, 2021 hi thank you for your time and help. I have numbers shown in 2 photos I am attaching. I am not totally certain but believe these numbers are: C40W4218 A I hope you can help me further with the information I need to describe it correctly in an ad to sell it. What price would you suggest I put on it? again, thank you for your help. sincerely Jerry Whitfield Link to comment Share on other sites More sharing options...
1912Staver Posted May 24, 2021 Share Posted May 24, 2021 (edited) That number is just the part number of the ring gear. It is easier to just count the gear teeth to determine the gear ratio than to look up the part number. Depending on how rusty the gears are they may not be usable. If it is a limited slip unit it will probably be worth at least $150.00 or perhaps even more. If it is not limited slip I am afraid it is almost in the scrap metal category , $20.00 or $25.00 if you are lucky. Edited May 24, 2021 by 1912Staver (see edit history) Link to comment Share on other sites More sharing options...
jerrybev Posted May 24, 2021 Author Share Posted May 24, 2021 thank you Link to comment Share on other sites More sharing options...
Dandy Dave Posted May 25, 2021 Share Posted May 25, 2021 (edited) Limited slip will have a clutch pack. A normal run of the mill rear will have spider gears along side of the ring and pinion. If your unsure a photo of the other side would help. The gear set itself does not matter as the limited slip parts are in the carrier if so equipped. Dandy Dave! Edited May 25, 2021 by Dandy Dave (see edit history) Link to comment Share on other sites More sharing options...
Dandy Dave Posted May 25, 2021 Share Posted May 25, 2021 Also, The ratio is usually stamped in the gear set. It would read 4.10 -1, or 3.73 -1. or something similar. Some rear ends had a tag affixed to the out side. Some have the number of teeth also in number form. 11-44 or similar number. Divide the small number into the big number and you have the gear ratio. Dandy Dave. Link to comment Share on other sites More sharing options...
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