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#1 |
Senior Member
Join Date: Jan 2016
Posts: 2,133
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I am looking to install Ford RTS 150 4 speed trans with a 41% OD.
Car is a 31 Deluxe Roadster with Snyder 5.5 head, enlarged intakes, new motor, B grind cam, FSI Zipper distributor and 4:11 rear end. I would appreciate it if the people that make the complete 150 kits PM me with your kit info, or reply to this post so others could have the same information. I have read everything I can from the Barn, Hamb, Mitchell, Volvo, etc. |
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#2 |
Senior Member
Join Date: May 2010
Location: Camino, CA.
Posts: 3,086
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Several members of my club, The Hangtown As in Placerville California have those transmissions in their Model As. They are very happy with them. I think you'll need a AA bell housing to make the switch.
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#3 |
BANNED
Join Date: Sep 2010
Location: Danville, CA
Posts: 1,557
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Are the AA bell housings difficult to find? I have heard that they are needed for this application and I hear of so many out there that I wonder where one finds the AA bell housing or is someone reproducing them? I may want to do as Old31 did. I have a 411 gear set and all the bearings. Might be a fun project for winter days when it's raining out here in sunny CA.
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#4 | |
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Join Date: Apr 2015
Location: Boise, Idaho
Posts: 1,581
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![]() Quote:
http://www.ebay.com/itm/Model-A-AA-F...%257Ciid%253A1
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Early '29 CCPU that had a 4-speed, but not any more.......in the family since '62 |
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#5 |
Senior Member
Join Date: May 2010
Location: Southern Upstate New York
Posts: 1,162
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old31 - the 41% OD will work good for you with the 4.11 rear. Unfortunately, you will still have nearly the same final drive ratios you have now in 1st, 2nd and 3rd........A better setup is the 26% OD transmission with a 3.78 rear.
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AL in NY |
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#6 |
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Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,123
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Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club |
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#7 | |
Senior Member
Join Date: Jan 2016
Posts: 2,133
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I was hoping to leave the rear end alone. Also, does it matter what year AA bell housing that you use? |
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#8 | |
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Join Date: Jan 2016
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#9 |
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Join Date: May 2010
Location: Southern Upstate New York
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No, I don't think there's too big a jump from 3rd to OD. Your overall radio in third is 4.11 and in OD with the 41% transmission, the ratio would be 2.91. With the 27% trans the ratios are 3.78/2.96. All I was saying is I think you would like the drivability of the roadster better with the 3.78. I have the 3.78 with the 27% OD trans and a stout motor in my 30 pickup and I'm thinking of going to a 3.54 rear because you can almost drive the truck by starting off in 2nd gear.(my overall ratio in 1st is 12.28)
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AL in NY |
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#10 |
Senior Member
Join Date: May 2010
Location: Austin, Texas
Posts: 925
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"I don't think that BH will work for a Ford 150. It says for a 5 speed."
It will work fine. The BH doesn't care what is behind it, 4 speed or 5 speed. Fabrications (or Kit)must be done with either one.
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I noticed the harder I work the luckier I get! |
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#11 |
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Join Date: May 2010
Location: So Cal
Posts: 8,822
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#12 |
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Join Date: May 2016
Location: Scottsdale, Arizona
Posts: 619
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Good Morning...You might also consider the Mitchell Overdrive. I have had one for 12 years with a 3.78 rear end and it has been wonderful and has not given me any problems...also it is designed specifically for the Model 'A' Ford.
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#13 |
Senior Member
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,123
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There are a couple of guys that fabricate a bolt-in kit using the Ford Tremec RTS transmission. That's the best way to go, as all the fabrication and machining is done for you.
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Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club |
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#14 |
Senior Member
Join Date: May 2010
Location: Van, Texas
Posts: 1,122
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MAG and old 31. The bell housing refered to above (listed on ebay) is a 1930 or 31 AA bell housing. It was -in the AA - coupled to a four speed Model A transmission. It is the same one we use to convert the F150 to Model A engines.
Old31. you will need the 30-31 four speed bell housing from a Model AA truck. BTW I think I have one left from my kit building days. |
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#15 |
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Join Date: Jan 2016
Posts: 2,133
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I have spoken with Mitchell and with owners of Mitchell. My problem is I just don't like the idea of having 2 levers or a pull cable.
Last edited by old31; 10-08-2017 at 08:42 AM. |
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#16 | |
Senior Member
Join Date: Jan 2016
Posts: 2,133
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Do you know of anyone else? |
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#17 |
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Join Date: Aug 2011
Location: Eagle Bend, MN
Posts: 2,030
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What would be wrong with this option? https://www.macsautoparts.com/ford_m...n-shifter.html
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"There are some that can destroy an anvil with a teaspoon and shouldn't be allowed to touch anything resembling a tool." |
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#18 |
Senior Member
Join Date: Nov 2016
Location: SoCal
Posts: 877
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eagle, that is an original 3 speed transmission converted to synchonizers. There is no overdrive in that transmission. I think the OP wants an overdrive.
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#19 |
Senior Member
Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,123
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Pm sent
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Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club |
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#20 |
Senior Member
Join Date: Jun 2011
Location: Australia
Posts: 244
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Ford 3+1 transmission conversion to closed drive set up
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