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By MplsMike - 12 Years Ago
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Hi, If you’ve read my other posts, you know I’m trying to figureout options for the transmission I just pulled out of my ’56 Parklane. Someone here on the forum has offered to sell me a transmission, converter andhousing and I’m trying to figure out if the assembly will simply bolt in and be immediately usable or if I willhave to make some modifications. I have a PAK transmission, which I understand is a 1955small case transmission used 272 2V. The one I would buy is a PAW, whichis a 1956-7 medium case transmission for a 312 4V. Both transmissions areair cooled. I like the fact that the PAW was meant for 1956 wagons, amongother models. Will Ineed to modify the driveshaft for the medium case transmission? What other issues may I have to deal with? Thanks,
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By MplsMike - 12 Years Ago
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I should have added that I am running a 272 2 barrel. Does that matter?
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By Lou - 12 Years Ago
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I belive it to be a bolt in swap.
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By Pete 55Tbird - 12 Years Ago
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Mike, Can you measure your existing drive shaft from center of yoke to center of yoke and also the measure the OLD FOM from front edge of case where it bolts to bellhousing to end of tailshaft housing so guys with other 56 aircooled FOM setups can compare and give you some feedback and advice/opinion. Pete
The Ford parts manual gives two lengths for FOM drive shafts in 56 Ford wagons. 53 1/8 for all
EXCEPT 312 station wagon which is 49 11/32. Get a quote for getting your drive shaft cut to size.
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By MplsMike - 12 Years Ago
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here is a picture of my transmission
From the part that mounts to the bell housing to the center of the mounting bracket it is about 11 3/4 inches. To the end of the tail (the metal part shown) is about 25 inches. To the end of the tail including the rubber housing is about 27 3/4 inches.
Here is the driveshaft:
I roughly measured 53 1/2 inches from center of yoke to center of yoke, so I'm guessing it is the 53 1/8 measurement suggested by Pete. I'll ask the seller for similar measurements.
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By Pete 55Tbird - 12 Years Ago
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Mike, I suspect that the different drive shaft length is because the station wagons had a different rear axle. Probably a Dana 44. Locally ( San Jose) you can get a driveshaft cut and ballanced for $125. Pete
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By MplsMike - 12 Years Ago
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Hi,
here is a comparison of my transmission to the transmission I might buy:
Questions/comments:
1) The mount is in a different location. It appears to me that if I reverse the mounting bracket/pad so that it faces the rear of the car versus the front, this problem may be solved. Is that the solution?
2) I wasn't sure what measurement I was provided, so the new transmission would be either 2 inches or 4.5 inches longer. All of these measurements may have a little slop in them, but I am planning to solve this by shortening the driveshaft as others have suggested.
3) Good to go otherwise?
Thanks as always,
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By Pete 55Tbird - 12 Years Ago
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Mike
To be consistant use the forward face of the top transmission to bell housing "EAR". Not the pan. In your picture this is in the top right hand corner. On two medium case FOM (56 and 57) I get close to 11 inch from forward face of ear to bolt hole on the trans mount bolted onto the bottom of case ( As in its ready to drop into the car).
The yoke that splines into the FOM output shaft FLOATS and has about 1 1/2 inch of wiggle room so when you measure to the tip of the output shaft that is not relavent. Measure to the tip of the casting around the output shaft instead. For this I get right at 27 inch.
I hope this makes some sense. Pete
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By MplsMike - 12 Years Ago
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thanks, Pete. Do you think I can spin the mounting bracket around and use that, or will I be in for some fabrication work to mount this new transmission? It would seem to me Ford would have engineered it in a way to maximize use of standard parts.
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By Pete 55Tbird - 12 Years Ago
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Mike
I am just guessing here but the distance I get shows me that the two FOM transmissions are the same dimention and the drivehaft length was changed to correct the fit with the bigger DANA 44 the station wagons have. Confirm which rear axle type you are working with. Adjusting a transmission mount for fore and aft is not a problem and the driveshaft cutting people should be able to help with that IF IT BECOMES necessary. At this point I do not think it will be. Pete
If I get a chance I will check the parts manual.
OK per parts manual extension housing length 52/56 16 35/64
EXCEPT 56 312 S/W which is 19 19/64 overall
Support assembly 51/56 all show the same part number
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