Odd Trans Case 99-7006?

[svm99]

I came across this transmission a few weeks ago at a swap meet. It was with a '37 engine and chassis so I figured it would be a "78" case and be worth looking at. After initial inspection all looked good so I scraped the grease to confirm the "78-7006" case number and was very surprised to find a "99" in place of the usual "78". It is deep like the late "78" cases and clearly was produced by Ford with this number, no one has "restamped the case. The serial number above the inspection cover is 18-4758624 which is an early '39 Ford # according to my research. It does have a 91A clutch arm which looks to have been bent to line up with the '37 pedals. It also has '35-'38 gears which were used in later commercial vehicles. I have compared the case to other "78" cases and find no differences. I have searched (along with another knowledgable friend) all of the Ford & Mercury parts books we have available and have not found a single reference.

Has anyone else seen a case like this. My thought is it was produced with the Mercury in mind though it was originally installed in a Ford. I never quit learning about our Fords, interesting as they are. Thanks for reading Paul J.

[Mac VP]

My 1938-39 Ford chassis parts manual does not list that part number for any of the 38-39 Fords or the 39 Merc. The 78 case was listed for both. Since it has an early Ford number in it, I would venture that Ford intended for the new Mercurys to have some slightly different case, then changed their minds and went with the 78 case after all. Perhaps an early casting run that just got used as regular production gearboxes. A deep study in the engineering notes a the archives might explain more.

[rotorwrench]

The serial number does indicate 1939 heritage but regular Ford car "18-" serial. Mac VanPelt might be the guy to ask about this one. There may have been a run of cases for the new Mercury cars that were more like the the later 78-7006-B, C or T cases with the bigger bottom interior for the larger cluster gears.

Mac beat me to it. It's nice to know that deviations exist in case we run into more.

[Charlie ny]

99,
I built the trans in my truck using that particular pt# case. It is the only
one I have ever come across.
Charlie ny

[svm99]

Originally Posted by Charlie ny

99,
I built the trans in my truck using that particular pt# case. It is the only
one I have ever come across.
Charlie ny

I was hoping you'd post on this subject, any thoughts as to what Ford was up to? I think Mac is on the right track with checking archive drawings.
Paul J.

[Charlie ny]

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99,
No ka lu at all !
Charlie ny

[38 coupe]

I will have to check my 39 Mercury parts transmission to see if it has that case. What shifter does it have? My 39 Mercury transmission has a longer shifter than a Ford transmission.

[JM 35 Sedan]

Paul, you may have meant to say... "It also has '36 to E '39 gears". 35 gears are not like the gears in your picture, plus some early 39's (standards I believe) did have gears like the picture. It would be interesting to know if that 99-7006 pn case is otherwise identical to a 78-7006 case.
I just bought a couple transmissions (a side loader & a top loader) and one has a 99-xxxxxx serial number stamped above the clutch inspection plate, but I am thinking this number is on the side loader case. Will check tomorrow.

[Bored&Stroked]

I realize this is an old thread, but I just resurrected my 39 Trans with Zephyr gears (that I built 40 years ago) - it too has the 99-7006 case. I wonder where these dudes came from?

[alan]

look to see if the bottom of the case is thicker than a 78 case, possible a commercial 3/4 ton 3 spd case. I have been told by old circle track guys that they used to hunt for a case with the thicker bottom and most of them were found in 38/39 3/4 ton trucks-these trucks also supplied the front hubs for a lot of stock cars

[hellmet]

funny im working on my roadster getting ready to do my trans and I have a 99 case too. I have Max Navarro renound 39 trans rebuilder helping me and he said all his years rebuilding them he never seen one.

[hellmet]

[Bored&Stroked]

As I built this 25T Zephyr trans when I was just 16 (4 decades ago), I can't remember where the hell I got the original transmission from? I had a strong 284 cube flathead in front of it - blew it up once in an intersection in Torrance CA (Sepulveda and Crenshaw), found another Zephyr cluster and second gear (hard to find even back then), put it together and ran it for another few hundred miles (and raced the car with a SCoT blower later on).

I recently decided to pull the trans out of 'hibernation' to put it into my 32 Cabriolet. And as fate has it, it is going behind another 284 cube 1942 Merc engine. It was still was full of nice clean gear oil - so I painted it and it should be ready to go. (Hotrod Gods willing)

Here is a picture of the resurrected tranny and the engine it is going with:

2015-07-07 16.31.44 copy.jpg

2015-07-07 16.20.48 copy.jpg

[Pat/Ohio]

B & S......I wish you had not posted the 2nd picture! You have opened a "can of worms" there buddy! I hope all is going well with your Cabby. Have you been to any of the ECTA meets in Wilmington lately? Pat

[40cpe]

Originally Posted by Pat/Ohio

B & S..... You have opened a "can of worms" there buddy! Pat

Yep, it's going to break for sure

[JSeery]

Nope, been done thousands of times, damaging a bellhousing happens but it is fairly rare. One of my current blocks was broken that way. I'm a believer in using a side mount for sure, but folks have been mounting them just like the photo without a problem for a long time.

[Bored&Stroked]

RE: Stand and Bell Housing Mount -

I use an exhaust flange mounted engine stand - except when I paint as it is damn hard to paint the side of the engine when the stand is in the way. I am very careful in moving the engine around and will put it back on the "correct stand" today.

DeckPicture-AllDone copy.jpg

By the way, I agree that there is a "slim chance" to break a bell housing - especially when you load up 150 more lbs of stuff on the engine and then do things like put a big breaker bar on the front to turn it over . . . pushing DOWN on the front as it is the only good way to use your body for leverage.

So everybody . . . relax!

[Mart]

One fell off my friends stand the other day. I will ask his permission to share the pics. It's a sorry sight.

Don't believe that it is an old wives tale and only happens rarely. When you have many many hours and many thousands of dollars invested in your motor the last thing you want is to have to repair the block.

Mart.

[rotorwrench]

I think a person could safely use a bell housing mount as long as they support the front of the block somehow. Bolt one of the tall hydraulic jacks to the front engine stand leg to take the pressure off. A person could just set the motor on its bell and paint it like Ford did as long as the pan is on there but a lot of folks like to dress them in different colors.

[Mart]

A picture speaks a thousand very expensive words.



Sorry for stealing the thread, this is a drum that needs banging.

Mart.