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rotorwrench · 09-03-2017, 05:52 PM

The first of the mid century Mercs had the Dana 41. They had a 3.91:1 for standard shift models and those with overdrive. They were also available with 4.27:1 & 4.55:1 ratios for mountainous regions and those that wanted to pull a trailer. Ratios changed with the change over to the Dana 44 in mid 1950 and for the Merc-O-Matic transmission that also came along in mid to late 1950.

Some new stuff is available for the 19-spline Dana rear axles but a person would have to contact Randy's Ring & Pinion to see what can be done there.

09-03-2017, 05:52 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,012	Re: 1949 Mercury differential ratios? The first of the mid century Mercs had the Dana 41. They had a 3.91:1 for standard shift models and those with overdrive. They were also available with 4.27:1 & 4.55:1 ratios for mountainous regions and those that wanted to pull a trailer. Ratios changed with the change over to the Dana 44 in mid 1950 and for the Merc-O-Matic transmission that also came along in mid to late 1950. Some new stuff is available for the 19-spline Dana rear axles but a person would have to contact Randy's Ring & Pinion to see what can be done there.