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Old 10-06-2010, 01:01 PM   #1
Art Bjornestad
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Default overdrive transmissions

I am trying to find suppliers of kits to install a Ford 4 speed OD tranny in my A. Dave@modelaonly is not returning emails or answering calls. Has anyone used another supplier and how can I contact them? Thanks
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Old 10-06-2010, 01:52 PM   #2
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Default Re: overdrive transmissions

Gary Bernard in ft worth. Weve put over 20k miles on ours and I LOVE it. I know George Tynan has put around 50k on both of his. Gary has been making them for around 20 years, and have never heard of any problems. Private message me for contact info. His kits i beleive are around $2500
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Old 10-06-2010, 03:59 PM   #3
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Default Re: overdrive transmissions

Perhaps Dave is in Hershey this week enjoying a respite from email & phone. I remember when snail mail (USPS 1st class) was considered speedy, and long distance phone calls required an operator to call back when a line was available. Try him in a week. Surely you can wait? You can see his stuff on his website.
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Old 10-07-2010, 07:49 AM   #4
john in illinois
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Default Re: overdrive transmissions

I have Dave's kit . You do not have to cut up your frame crossmember or your brake cross shaft ,as with other kits. It is a drop in kit.Works great.
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Old 10-07-2010, 08:19 AM   #5
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Default Re: overdrive transmissions

What is Daves web address. thanks Joe
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Old 10-07-2010, 11:06 AM   #6
1928Pickuppain
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Default Re: overdrive transmissions

How mush more speed do you get from the fourth gear
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Old 10-07-2010, 11:44 AM   #7
AL in NY
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Default Re: overdrive transmissions

Here is an email from Ken Parker who posts on Fordbarn concerning his F150 kit:
From kpandlp@att.net (kpandlp@att.net)
Sent Sunday, June 17, 2007 9:25 pm
To aberry@hvc.rr.com
Cc
Bcc
Subject F150 OD transmission
Saw your post on Fordbarn. There are two shops in Texas that build the units you speak of. Gary Bernard and me. Both built from F100 or F150 transmissions but how they are cuopled to the model A is slightly different. My units uses a AA bell housing and requires no cutting on the center cross member of modifications to the brake cross shft. It is complete with AA bell housing, Throwout bearing and hub, new Clutch disc, transmission - rebuilt, Shortened radias rods, shortened torque tube, shortened drive shaft, Clutch and brake pedal bracket, 30-31 style emergency brake bracket, Shift lever adapted to look like model A. All nuts and bolts for installation included. Complete package $2500. I have further info if you want it and pictures.

I am in Van, Texas - 80 miles east of Dallas. Ken Parker 903- 963-1650

Note the date 6/2007, the price may be slightly higher now. I installed one myself and have instructions if you are a real good mechanic and have access to a lathe and milling machine. And Art, I sent you my instructions which also list the three fellows (Gary, Ken and Dave) who make the F150 kits and their contact information.
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Last edited by AL in NY; 10-07-2010 at 11:50 AM.
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Old 10-07-2010, 11:55 AM   #8
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Default Re: overdrive transmissions

What are the gear ratios of the 4-speed? The only one I have ever ridden in had a HUGE RPM drop between 2nd and 3rd gears, other than that it seemed to work nicely. I personally would go for the Mitchell.
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Old 10-07-2010, 07:15 PM   #9
Jim Parker Toronto
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Default Re: overdrive transmissions

Here's some info I got for mine, I think it was from modeladave's (not sure)

Overdrive Transmission:
The Overdrive transmission 1928-1931, 1935-1939 is a unique, fully-synchronized, transmissions for the Model "A" and early V8. It has the overdrive built inside the case. There are no extra leavers, cables, or electric switches involved.
The drop in conversion kit that I manufacture has all parts necessary for a drop in installation. No special tools are required.
There are 4 different ratios:
.......................1..... 2 ...... 3 .......4
Gear Ratios...1st - 3.01.... 3.25 .... 3.25 .....3.01
.....................2nd - 1.78 ....1.92 ....1.92 ... 1.78
......................3rd - 1.00 ....1.00.... 1.00 ....1.00
....................O.D. - 0.72 ....0.71 ....0.78 ....0.79
....................Rev - 3.01 ..... 3.25 ....3.25 ....3.01



1984-1987 Ford light duty top shifter. It is a three speed with the fourth being overdrive and all gears are synchro in forward direction. Believe it is Tremac transmission. I also believe that you want the one with the long tailshaft. Also believe that there were a couple or three ratios of that transmission offered. You should be looking for a TOD (top shifter, overdrive), T170FT (code-RTS).

Last edited by Jim Parker Toronto; 10-07-2010 at 07:30 PM. Reason: alignment of numbers, Won"t stay where I put them, done it twice, sorry
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Old 10-07-2010, 09:23 PM   #10
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Default Re: overdrive transmissions

Can the earlier top loader overdrive transmission be converted for this too? I'm talking about the cast iron case Ford top loader looking transmission (that the muscle car guys like) only with the 3-4 shift lever flipped and overdrive where 3rd used to be. I know you can put a Jeep top on a Ford top loader to get a top shifter.
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Old 10-07-2010, 10:09 PM   #11
Jim Parker Toronto
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Default Re: overdrive transmissions

"Can the earlier top loader overdrive transmission be converted for this too?" ......of course it can, all it takes is time, some engineering, some machine shop work, a little bit of money, and the desire to do it! Go for it!
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Old 10-08-2010, 11:15 AM   #12
Jim Brierley
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Default Re: overdrive transmissions

Thanks for the ratio chart Jim, I've been running a Columbia under my widebed for some 40 years, works great and I like the ratios.
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Old 10-08-2010, 08:43 PM   #13
Jim Parker Toronto
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Default Re: overdrive transmissions

Jim, I am putting that F150 transmission behind a B motor that Ted Koudy just put together for me. I can't wait till next spring!
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Old 11-09-2010, 04:14 PM   #14
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Default Re: overdrive transmissions

Quote:
Originally Posted by Art Bjornestad View Post
I am trying to find suppliers of kits to install a Ford 4 speed OD tranny in my A. Dave@modelaonly is not returning emails or answering calls. Has anyone used another supplier and how can I contact them? Thanks
I have also been trying to contact Dave without success. I have several of his other products installed on my 31 PU, and wanted to do the tranny this winter, but he has yet to respond. I've been trying for about a month.
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Old 11-09-2010, 04:24 PM   #15
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Default Re: overdrive transmissions

I heard Dave had been on an extended vacation and just returned in the last few days.

Joe
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Old 11-09-2010, 08:59 PM   #16
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Default Re: overdrive transmissions

Can someone give specifics on exactly what the referenced Ford 150 overdrive transmission is, please? Is it hard to find, or not so hard? In what price range are they found at wrecking yards?
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Old 11-09-2010, 09:09 PM   #17
Jim Parker Toronto
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Default Re: overdrive transmissions

southfork, it is a 1984-87 Ford 1/2 ton six cylinder or small V8, made by Tremac and has a serial # that starts with RTS. They are not real rare, but will be hard to find, and should be around $500.
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Old 11-09-2010, 10:46 PM   #18
AL in NY
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Default Re: overdrive transmissions

Search the "Barn" for "F150" and you'll find all the information you will need to find the correct transmission.
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Old 11-15-2010, 08:52 PM   #19
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Default Re: overdrive transmissions

Quote:
Originally Posted by Art Bjornestad View Post
Dave@modelaonly is not returning emails or answering calls.
Dave is back from his extended time out of town. I heard from him today!
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Old 10-18-2011, 11:08 PM   #20
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Default Re: overdrive transmissions

Has anyone tackled the exteme drop in RPM from the 2nd to 3rd shift. In Colorado, the forward motion really drops on it's face when you shift, 1st and 2nd is fine, after a good run 3rd is ok, but it takles a while to get the rpm back after that shift from 2nd to 3rd. And 4:11's don't help it even with a good inserted engine!!
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Old 10-19-2011, 07:38 AM   #21
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Default Re: overdrive transmissions

Carl,Glad you heard from him,I always thought he was a nice guy to deal with.

John
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Old 10-19-2011, 08:44 AM   #22
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Default Re: overdrive transmissions

All the information in the above post is correct. Here is a little bit more in - or info put another way.

Of the 4 ratios available the .71 OD ratio equals 38-39%. That is a huge strain on most Model A motors.
The .72 OD ratio equals approx 37%. Still a big strain on Model A Motors unless you have a beefed up HP wise motor.
The .78 OD equals 27%. Almost perfect for most of out A's.
The .79 OD equals 25-26% and also is a great match to the A. But it is the most difficlult ratio to find. In fact in 13 years of building these kits I have never seen one. I believe it was Al that posted a chart that showed which transmission was fitted behind which Ford motor.

Someone ask about using the Cast Iron Case Top Shifter. It can be made to fit but is VERY HEAVY and larger. It was designed for the heavier duty trucks, as in the F250.

Another ? was can the earlier version be used. By that I think he meant the 1977 thru 1983 version of the 170 RTs. It is called the 170 RUG and the shifting stick is mounted on the tailhousing- 4" further back and 1 1/2" to the left. It is also refered to as the Single Rail Shifter. It can be fitted to the Model A and I have done two of these. One in is my Speedster. Since the tail housing must be left on the transmission the Drive Shaft must be converted to Open Drive Line.-No big Deal.

Now to explain my %'s. The Output shaft on a 27% OD ( .78) turns 27% faster than the Input shaft.

for the record I have two 27% kits and one 37% kit on the shelf - partially finished.
But , I do not ship any longer - pick up at shop only. After these three are gone I will get out of the business. The trannys are getting too hard to find. Especially the 27% ones.
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Old 10-19-2011, 12:11 PM   #23
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Default Re: overdrive transmissions

Quote:
Originally Posted by john in illinois View Post
Carl,Glad you heard from him,I always thought he was a nice guy to deal with.

John
Well -- if you note the date on that post, it was almost a year ago. And yes, Dave WAS a nice guy to deal with. I have his Alternator and Weber Carb kits. Then right after that last post, I sent him money for the OD tranny. Last I heard from him was probably in March of this year when he said that he was shipping the tranny "next week". Too much to go into here, but bottom line is -- he's gone! And my expectation of ever seeing a transmission or my money back from him are slim to none.
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Old 10-19-2011, 01:06 PM   #24
john in illinois
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Default Re: overdrive transmissions

I did not notice the post date. I was hoping that you got the product or the money back. I in no way condone Dave's actions.

John
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Old 12-07-2017, 07:32 AM   #25
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Default Re: overdrive transmissions

Hello, I'm the new kid here to the Model As. Just bought an early 28 and I'm wondering about an overdrive unit to install. I' m already tired of the 45-50 mph vibration. If anyone has any ideas I wouldn't mind some info. I have an early 28 Sport Coupe with a multidisc clutch. I'm here in Wisconsin so my car is asleep for the winter.
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Old 12-07-2017, 08:15 AM   #26
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Default Re: overdrive transmissions

You have 3 or 4 OD options open to you. Do a search on overdrive and that will keep you busy for a while.

It all depends on how much you want to spend, how much work you want to do, how many changes you want to make to the car, the kind of changes you want to make to the car.

While your at it consider a sychro trans.
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