pflaming Posted April 29, 2018 Report Share Posted April 29, 2018 My differential is so cruded over I don't know where to start to find the ratio number. Can it be in different locations? Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 29, 2018 Report Share Posted April 29, 2018 on flat, top of hog head (carrier) look just right of the fill plug...maybe a tad lower than even.... Quote Link to comment Share on other sites More sharing options...
Desotodav Posted April 29, 2018 Report Share Posted April 29, 2018 Should be stamped in the flat section below the fill plug Paul. Quote Link to comment Share on other sites More sharing options...
pflaming Posted April 29, 2018 Author Report Share Posted April 29, 2018 No fill plug on the butt end. Quote Link to comment Share on other sites More sharing options...
pflaming Posted April 29, 2018 Author Report Share Posted April 29, 2018 (edited) No plug on the end no number by the plug. Edited April 29, 2018 by pflaming Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 30, 2018 Report Share Posted April 30, 2018 in the top picture...on the right....se the machined flat...this is the bottom, check opposite for similar flat.....clean this....normally the ratio is expressed by gear tooth count..divide the big number by the little number to get the ratio Quote Link to comment Share on other sites More sharing options...
DJ194950 Posted April 30, 2018 Report Share Posted April 30, 2018 Try looking upward? Some I found are from above and forward of the fill plug -stamping was done by hand and not are not located in a small area -found several there on Mopar early third members. Almost anywhere in that area as most are. Is the truck or the Suburban? Just wondering. May make some difference? DJ Quote Link to comment Share on other sites More sharing options...
pflaming Posted April 30, 2018 Author Report Share Posted April 30, 2018 (edited) Can any one read these markings. I read it as 3.9F Edited April 30, 2018 by pflaming Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted April 30, 2018 Report Share Posted April 30, 2018 believe you looking at 3.9F actual ratio express with the letter F for final...no division needed 1 Quote Link to comment Share on other sites More sharing options...
countrytravler Posted May 4, 2018 Report Share Posted May 4, 2018 3.91? Quote Link to comment Share on other sites More sharing options...
pflaming Posted May 5, 2018 Author Report Share Posted May 5, 2018 The marking on my '53 is 3.73. The 3.91 was ginseng to me. The drums have stubs so may use those. Quote Link to comment Share on other sites More sharing options...
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