Hi all, I'm trying to find a 3.91 or 4.09 ring and pinion for a Dana 41 rear end. I've been told that late 40's Ford pickups and some Merc cars used these.. Anyone have any specific insight, or even better, a source for a ring and pinion? Thank you
1948-50 Ford F1 should have the Dana 41. 51-52 F1 is when they started to go to the Dana 44. V8 48-50 F1s were 3.73. 6 cylinder trucks were lower.
Don't know about the 41, but in the 44 the carrier is 3.73 and down, or 3.9 something and up. Long ways for shipping, but these guys will probably know it's availability or not. https://www.randysworldwide.com/pro...MIlbOWi-r-7gIVAh-tBh0xpAjZEAAYASAAEgK-yfD_BwE
Why a 41 and not a 44 ? Those AMC mail Jeeps of the 1970's early 80's came with a posi and they weren't abused at all !
perhaps he has a car with a 41 rear in it, and wants to put some gears in it...so he needs 41 gears, not 44 gears? I have a Dana 45 rear, with 3.91 or 3.92 gears I forget which....it uses a different size pinion bearing than the 44. Factory equipment in a 1959 chevy half ton with posi
Right. My ‘46 Stude pickup has a Dana 41, but the 4.88 rear gears have to go. Swapping in a 44 (or anything else) would be too easy. Half the fun is in tracking down the obscure stuff.
The Dana 40 series has been around a long time. The various versions, 41,44,45, maybe a 43 confuse me to hell. Different axles, bearings, carriers, etc. just in Fords. Throw in the other applications it gets worse. I'm pretty sure the 44 in my bird came out of a truck somewhere along the way. Bigger axles and different bearings. Hack job welding on the perches, as the bird perches were different from the car and trucks. After all these years, who knows what got changed when the junkyards were still full of them. What I do know is after 3 gear changes, straightening the tubes, cleaning up the bad welds, etc. I'd be money ahead having put a whole new rear axle in with a pumpkin I could change myself. I can't do the whole gear set. There's a discussion going on at the barn now about someone trying to find the right specs to do that.
interesting...I did a little googling, someone 15 years ago with a stude asked Spicer and got this reply: I could find no Spicer interchanges for the Studebaker part numbers that you provided [523660 case and 195117 case]. There is no application information for any vehicles using the Model 41 axle. However, I did find an assembly drawing of a 41-2 axle with a bill-of-material number of 2081. No customer information appears on the drawing, so I don't know whose vehicle it was designed for. I will assume that it is typical for all Model 41 applications. This bill-of-material was available with 3.73, 4.09, 4.55 and 5.38 gear ratios. The 3.73 and 4.09 ratios used a differential case with a part number of 15998 which was made from casting number 15999. The 4.55 and 5.38 ratios used a differential case with a part number of 15518 which was made from a casting number 13828. Nothing that I was able to find indicated exactly where the ratio break was between the two cases. The numerically high ratio case (4.55 and 5.38) part number 15518, had a dimension from the centerline of the cross shaft to the mounting flange for the ring gear of 1.0625". The numerically low ratio case (3.73 and 4.09)part number 15998, had a dimension from the centerline of the cross shaft to the mounting flange for the ring gear of 1.250". There is a difference of 0.1875" between the two. You asked if it is possible to machine the flange of the high ratio case to allow mounting of low ratio gears. The flange thickness is 13/32" (0.40625"). If you remove 0.1875" from it, you will have a flange thickness of 0.21875". I would not recommend doing this. You are correct in your assumption that Dana doesn't have either of these cases anymore. You also asked if there is a copy of the original parts list available. Since I was unable to identify the bill-of-material number that was used in your Studebaker, I used the only one that I could find. It is highly unlikely that we have a copy of the one that you seek."
mbstude, don’t know if this is of any help as it is taller than you are looking for and might need a different series carrier but Early Ford V8 Sales has new 3.54:1 gears for sale for the ‘48-50 Ford half ton that also used the Dana 41. 8C-4209-HS is their part number
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