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02-24-2019, 08:55 PM | #1 |
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F150 trans or 39 Ford trans for banger?
Hi all, new to this forum and looking for an answer. I was going to post in the HAMB but figured I could get a more specific answer here.
I have a f150 trans with the 26% overdrive in it but was wondering should I stick with that or put a ‘39 ford top loader in the coupe instead. Still has the 4 banger in the car. Will the ‘39 trans be better than the stock “A” trans other than the fact it has synchros in it. Would I get more top speed out of it over the “A” trans ? Thanks, Joe |
02-24-2019, 09:15 PM | #2 |
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Re: F150 trans or 39 Ford trans for banger?
Top speed is still 1:1 with the 39. Just has the advantage of syncro 2nd and 3rd. F150 has the OD but may require more work to install. I like the 39 with a 26% Mitchell, or better yet the Mitchell tranny and Mitchell O/D. Love that combo in my roadster. No modification to frame or body and can go back to stock with no sign of alteration if you keep your old floorboards and create new ones for the O/D or get the cable shifter.
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02-24-2019, 10:21 PM | #3 |
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Re: F150 trans or 39 Ford trans for banger?
Thanks. Dang. The mitchel stuff sounds great but an extra lever for od and the cost of around 5k not worth it in my eyes. Looks like I’ll be sticking with the f150 trans and getting the Mac’s speed shop bellhousing and parts. I’m long gone from going back to stock since it’s hotrodded now
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02-24-2019, 11:18 PM | #4 |
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Re: F150 trans or 39 Ford trans for banger?
The decision depends a lot on how you are going to drive it. I don't drive a lot and would just keep the original transmission. A little time and you can learn to double clutch the non synchro trans. Definitely a lot less costly. My second choice would be the '39 trans using one of the adapter kits. If I was going through the rear end it would get 3.54 gears to increase the top speed.
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02-25-2019, 12:07 AM | #5 |
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Re: F150 trans or 39 Ford trans for banger?
The F150 gets my vote. I have about 20K miles on mine now and wouldn’t do it any other way.
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02-25-2019, 07:31 AM | #6 |
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Re: F150 trans or 39 Ford trans for banger?
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Carl that’s what I’m thinking. Thanks. |
02-25-2019, 08:01 AM | #7 |
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Re: F150 trans or 39 Ford trans for banger?
with the f150 are you using the torque tube or going to an open drive line.?
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02-25-2019, 08:42 AM | #8 |
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Re: F150 trans or 39 Ford trans for banger?
The truck I bought last year just so happened to have an F150 transmission in it. I love driving it. The guy I bought this truck from drove it from Reno to Alaska and from the west coast of the United States to the East coast and back. Between that transmission and the 6:1 head it's quite the driver.
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02-25-2019, 08:56 AM | #9 |
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Re: F150 trans or 39 Ford trans for banger?
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02-25-2019, 08:58 AM | #10 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
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02-25-2019, 09:26 AM | #11 |
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Re: F150 trans or 39 Ford trans for banger?
The higher the compression the quicker the stock trans shifts,the mitchell od is a 'gear splitter' and is syncho so mated with a stock trans you get some synchro shifts.Flywheel housing alignment is crucial to smooth stock trans shifting as well..
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02-25-2019, 10:33 AM | #12 |
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Re: F150 trans or 39 Ford trans for banger?
With the cable shifter on the Mitchell Overdrive there is no extra lever on the floor. It can be mounted onto the transmission shift lever like the big trucks, Push down it is in over drive, pull up it is out. Real easy to split gears for the hills and onramps.
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02-25-2019, 11:17 AM | #13 |
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Re: F150 trans or 39 Ford trans for banger?
I understand now. But the price still stands. $2800ish. That’s a lot vs doing a f150 swap. If you wanted to leave the car stock appearing and be able to put it back to stock then yes it’s great.
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02-25-2019, 11:49 AM | #14 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
The F150 swap is not a simple bolt in swap. Read through the whole thread in the link especially posts 20, 63, and 66. https://www.fordbarn.com/forum/showt...ht=dave+delume Bob |
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02-25-2019, 11:50 AM | #15 |
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Re: F150 trans or 39 Ford trans for banger?
The total cost for me was lowest with the '39 transmission. I already had the 39 box, so it was just the cost of the Clings kit. The kit is a very sanitary setup, well engineered and less than $500. As I have a rdstr PU, I was not looking for any more top end, as I'm not even running a top. No messing with the torque tube, and no modifications to the chassis.
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02-25-2019, 12:03 PM | #16 |
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Re: F150 trans or 39 Ford trans for banger?
Doing the f150 conversion holds two options,open or closed driveshaft.Open includes altering the rear suspension,closed includes costs for adapters.Often folks just put heim joints on the radius rods and weld them to the frame,changing the suspension geometry and transferring load to the frame rail which isnt designed for it.Not to mention the torque tube is a critical part of stabilizing the rear axle.
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02-25-2019, 12:05 PM | #17 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
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02-25-2019, 12:13 PM | #18 |
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Re: F150 trans or 39 Ford trans for banger?
Railcarmover. I will be keeping the torque tube. I’ve seen what someone has done with a hiem joint torque arm type of setup and open drive line. Seems like more work vs keeping the torque tube.
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02-25-2019, 12:23 PM | #19 |
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Re: F150 trans or 39 Ford trans for banger?
JUST WANT TO BE CLEAR.......
- I know what it takes to put a f150 transmission into a model A. I know many are helping with information on putting the trans in the car and I thank you but it is not needed. Original post was asking does the 39 trans have a better gearing ratio to go faster over the A trans. Thank you. I know everyone is trying to put input on how to f150 trans or 39 trans into a model A but i don’t understand how many can just disregard the original posts question and start stating other information and snowballs from there. |
02-25-2019, 01:04 PM | #20 |
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Re: F150 trans or 39 Ford trans for banger?
The '39 does not have overdrive, its advantage over the stock A is syncro on 2nd and 3rd and better gear ratio-split. Top speed will not be much different as you don't have enough power with a stock engine to take advantage of the O.D. but cruising with the F-150 will be easier and more comfortable, with the V8 cruising at 60 would be straining the engine ... not good. Cruising speed with a V8 would be 45-50.
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02-25-2019, 04:51 PM | #21 |
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Re: F150 trans or 39 Ford trans for banger?
JT1930; I did the F150 in my CCPU myself. Looks like you know what it takes to do the machining, so that makes the F150 a better choice then the 39 trans because of the OD. Go with the F150 and you won't be sorry. Cost for that conversion when you DIY is very reasonable. Good luck..
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02-25-2019, 06:45 PM | #22 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
Thanks Al ! I was going to use a model AA bellhousing but didn’t feel like fabbing up the shaft for the pedals. Getting the cast bellhousing from macs speed shop with the throw out bearing kit and the rear plate to mount the ujoint clam shell. That should get me going fairly quick. |
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02-25-2019, 06:54 PM | #23 |
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Re: F150 trans or 39 Ford trans for banger?
Does Mac's offer any guidance as to how much the shorten the driveshaft, radius rods and torque tube when using their bell housing and adapter plate? The reason for the question is I have a friend in our Model A club that's been thinking about doing the F150 conversion. I said I would fabricate the rear adapter plate for him. Mac's plate would be a much easier build.
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02-25-2019, 07:30 PM | #24 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
Not sure. But I’ll be finding out soon. I know it is a 5/8” plate that bolts directly to the rear of the trans and then you directly bolt the clam to it. When I get it set up I’ll shoot you some measurements of what I’ve got. |
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02-26-2019, 07:45 PM | #25 |
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Re: F150 trans or 39 Ford trans for banger?
This from Dave about his transmissions,
Complete bolt in kit, no cutting of your car, rebuilt transmission,u joint ,t.o. bearing. Chrome shift lever, clutch disc, bell housing petal and emg brake mounts, gaskets , driveshaft. Torque tube, radius rods, (these have been shortened and are exchange items) $3800.00+ shipping . thanks
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02-26-2019, 09:21 PM | #26 |
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Re: F150 trans or 39 Ford trans for banger?
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All that said, I have a car with the Mitchell O/D and their synchro gearbox. I use a cable shifter on it as Daveymac29 mentioned. I figure that is about as close to a T5 as I will ever get. My other As have the standerd gearbox and the Mitchell O/D. A standard driveline is too slow these days, IMO.
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02-27-2019, 09:19 AM | #27 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
You sold me at the chrome shifter..... 3800 bucks is nice for someone who wants to plug n play on their car. I like to fab and do it cheaper and then have an appreciation of what I’ve done. But that’s just me. |
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02-27-2019, 02:07 PM | #28 |
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Re: F150 trans or 39 Ford trans for banger?
Some of us have those skills. Those of us who don't pay the piper!
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02-27-2019, 10:53 PM | #29 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
The MACs bellhousing makes the conversion relatively simple with the original pedals mounted left or right sides and the hand brake simply mounted as per the attached photograph. I have opted for an open prop shaft, but I believe that MACs has a conversion kit for the torque tube. The clutch is the one minor hiccup and once again MACs can supply a suitable unit, or a clutch from a turbo charged 4 cylinder Mustang will do (not the current model) Last edited by wensum; 02-28-2019 at 02:41 PM. |
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02-27-2019, 11:23 PM | #30 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
To answer your question, the f150 will go faster because of the overdrive, IF, you have enough horsepower to pull the higher gear. (4th) There is one thing you should know that has NOT been mentioned and that is the gear ratios in the f150 are very poor. Much worse than the stock A transmission. BIG rpm drop between 2nd and 3rd. Super annoying if you drive in hill country much. |
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02-28-2019, 10:24 AM | #31 |
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Re: F150 trans or 39 Ford trans for banger?
Pete there is not much difference between the F150 trans ratios and the Model A 3 speed.
F150 Model A 3.25 3.12 1.92 1.85 1.00 1.00 .78
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02-28-2019, 06:08 PM | #32 | |
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Re: F150 trans or 39 Ford trans for banger?
Quote:
I noticed also that you moved the accerator pedal over to the right.
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03-01-2019, 07:25 AM | #33 |
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Re: F150 trans or 39 Ford trans for banger?
Another alternative is a close ratio gear set in the original transmission
Belchers in the UK offer two sets:- 18T/29T 1st = 2.592 - 1 2nd = 1.543 - 1 Top 1-1 Total ratio 1.61-1 or 20T/27T 1st = 2.173-1 2nd = 1.293-1 Top 1-1 Total ratio 2.609-1 Price is £785 which is just over $1k right now, plus shipping etc Solves the problem of the big jump between 2nd and top. No synchro or o/d but no cutting or altered appearance. Price is enough, but got to be cheaper than an adapter and a good used/rebuilt 39 or F150 trans. I don't have a set (yet) but have passengered in a car with them fitted and it makes a hell of a difference to drivability. All positive feedback so far as I am aware. |
03-01-2019, 12:39 PM | #34 |
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Re: F150 trans or 39 Ford trans for banger?
Wensum looking good. I bet with the torque tube adapter it would be minimal if any cutting of the cross member but for me I don’t care. This car is not a stocker.
Also the stock A trans and f150 trans are very close like stated above. With having a Winfield 6.1 head and other mods it should power through the gears fine. |
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