Tony Thompson Posted November 20, 2019 Share Posted November 20, 2019 Have a 56 trans available. Can anyone here tell me if they will interchange? Would like to swap the 56 trans into 55 if it will work. 55 has a 264 and good 56 trans is on back of tired 322. Thanks in advance for any help! Tony Link to comment Share on other sites More sharing options...
NC-car-guy Posted November 20, 2019 Share Posted November 20, 2019 The tail shaft and torque tube are different lengths. The u-joint splines are also different. Can you have the 55 rebuilt? Or look for a 56 rear end. Link to comment Share on other sites More sharing options...
SpecialEducation Posted November 20, 2019 Share Posted November 20, 2019 (edited) https://forums.aaca.org/topic/63104-dynaflow-for-1955/?do=findComment&comment=255243 Edited November 20, 2019 by SpecialEducation (see edit history) Link to comment Share on other sites More sharing options...
old-tank Posted November 20, 2019 Share Posted November 20, 2019 2 hours ago, Tony Thompson said: Have a 56 trans available. Can anyone here tell me if they will interchange? Would like to swap the 56 trans into 55 if it will work. 55 has a 264 and good 56 trans is on back of tired 322. Thanks in advance for any help! Tony Go for it. The overall length of the 56 tranny is the same as 55 50-70 series. You will need to swap in the 55 universal joint with the different splines and you might need to use the 56 transmission support and/or parts that attach to the support. Everything else will hook up ok. The 56 tranny will function the same except the switch pitch feature works in Low also...I can smell the tire smoke already. 2 1 Link to comment Share on other sites More sharing options...
NC-car-guy Posted November 20, 2019 Share Posted November 20, 2019 49 minutes ago, old-tank said: Go for it. The overall length of the 56 tranny is the same as 55 50-70 series. But if it's not a 50/70 series car.... Link to comment Share on other sites More sharing options...
Tony Thompson Posted November 20, 2019 Author Share Posted November 20, 2019 You guys are great, thanks for speedy info! I am learning as I go and everyone's knowledge is greatly appreciated. Now I need to figure out how to ID a 50/70 series car as I do not know what that means yet. If the 56 swap is not a easy or good idea then I need to locate a reputable trans shop to rebuild original 55 trans that is in the car. Any good trans shops in Iowa or Minnesota? Live in extreme south MN and could trailer to a good shop in the 3 or 4 state area if the 56 swap sounds bad. Thanks again, Tony Link to comment Share on other sites More sharing options...
old-tank Posted November 20, 2019 Share Posted November 20, 2019 3 hours ago, NC-car-guy said: But if it's not a 50/70 series car.... 55 Super Needs Dynaflow Replaced....Super is 50 series. Link to comment Share on other sites More sharing options...
NC-car-guy Posted November 21, 2019 Share Posted November 21, 2019 46 minutes ago, old-tank said: 55 Super Needs Dynaflow Replaced....Super is 50 series. Lmao. Thats true. I wasn't reading the title. I was just stuck on the "264"in the 1st post. 1 1 Link to comment Share on other sites More sharing options...
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