At the moment on e-bay,  there are 2 truck y block bell housings for the "narrow" bolt pattern transmissions. This is the pattern most all the adapters are made for. These are hard to find and this one is very reasonable. I'll try to post the link but they are listed on e-bay, vintage car and truck parts, "Ford y block bell housing."  Hope this helps, JEFF....     hhttps://www.ebay.com/itm/54-55-56-64-FORD-TRUCK-V8-Y-BLOCK-BELLHOUSING-TAAM-7506-BF100-239-272-292-312/112983393526?hash=item1a4e55c4f6:g:QCkAAOSwR65aytE5


64F100 57FAIRLANE500

I have often wondered how it would work if you put a 3.00 reare end behind one of those granny low 4 speeds and started out in 1st with it?

If the tranny in your truck is one of the "granny low gear" ones, it is probably a Borg Warner T98.  That tranny was used for many years, and was available in later Y Block trucks.  A Y-Block bell housing for a T98 would connect the Y to the original tranny.  However, it is NOT an overdrive tranny, it is a 4 speed with a super low, seldom used 1st gear, but high gear is a strictly 1:1 ratio.

John - "The Hoosier Hurricane"

I'm not sure.  There were adapters and bellhousings made by the aftermarket at the time to swap Y-Blocks into older vehicles while retaining the rest of the stock driveline.  However an F5, being the more heavy duty truck that it is, would not have been the target of such hot rod parts.  I don't know if those things would have worked for that.

If you go to eBay and search for Y-Block Bellhousing, you will see all of the Factory Y-Block offerings as well as an Offenhauser transmission adapter for '32-'50 transmissions.  You can use those images to help id what you have.  Another thing to do is to look for a model number or date code on the transmission but if it is all gunked up like most things that old are, it may not be easy to find.


Lawrenceville, GA

First thank you all for the replies guys.  I don't know enough yet to know how much I don't know.

Charlie,

So it is safe to assume that since only y block trannys bolt to y block engines the tranny current in my 1948 F5 (which came originally came from Ford with a flathead) is not the original 4 speed tranny to the truck?

Michael

I don't think he has an adapter that it will work with.  Gary (speedpro56) put one in his 'bird.  I think he said the aftermarket ones come with something you can drill to fit the bellhousing, I guess a front plate of the transmission.


Lawrenceville, GA

What has to be done for a T-56 to bolt up to Mummert's adapter?

  Ron Lane,  Meridian, ID

There's G-force and Astro that I know of, who can modify T5s for more power.  Cost depends a lot on what you have done. For most modification, you still have the stock T5 case, which really makes me question the durability.  If you go with an upgraded case, it is quite expensive, and a TKO or whatever the current equivalent is, or T56 is probably just a small increase in price.  That said, if a  T5 was already in place, it could be a good idea as long as the modifications do live up to the claims.  Been a while since I looked at it.  


Lawrenceville, GA

If that eng. has been setting a long time like shown in the picture with no carburetor, and air cleaner.  I would pull the intake off of it and vacuum out the cylinders, and the intake runners.    there is probably a bunch of insect/rodent residue in there. If you don't pull the intake , at least try and make sure the intake runners are clear by using a shop vac, and suck out anything you can.

Charlie;
That's very true. The T-5 were only rated at about 300 HP. I did find a company though called "G-Force Transmission" that can convert your stock T-5 to their "Street T-5" which they rate at 550 HP. They change everything; mainshaft, gears, syncro's and bearings. I haven't looked into the cost, but I'm considering them for my upgraded blower motor.

  Ron Lane,  Meridian, ID