T85 transmission
 

My 55 Crown currently has a T86 overdrive with a R10 OD unit. I acquired a T85 with R11 OD that I want to upgrade to. The T86 is 28 inches long and the T85 is 34 1/2 inches long. Don't know if the trans mount will line up or not yet. Did Ford offer the T85 in 55 or 56? Other wise I will have to shorten the drive shaft to use it. Any recommendations on finding a drive shaft that will work or getting mine shortened?
Thanks,
Ben

Re: T85 transmission
 

To the best of my knowledge ... :o

The T85 was used in 1955 production in HP applications along with the T86 in lower HP applications.

It is a fuzzy subject as you get all kinds of descriptions, IIRC and/or hearsay. The 49/59 MPC does not give (or I have found) an exact application chart, as found in the 60/64 MPC. If you GOOGLE for information it usually winds up with JEEP. My guess is original BW parts books and you would have to draw FOMOCO info out.

That being said, can you post any CASTING ID Nos off the main case, OD unit and tail housing?

Also, there is a 6V and 12V solenoid.

Re: T85 transmission
 

Kultulz, Info on T85 as follows: Side cover WG DIV, T89B-148, Q6
On pass side of transmission: T 85 C-1A, WG DIV
On a plate cast into transmission 9-19
On overdrive unit:/stamped in tail shaft W1, on plate cast into tail shaft J276
Raised letters on tail shaft WG R11-1J

Don't know if this is any help. The measurement from the bell housing to trans mount is 12 inches, same as T86. Main problem is the tail shaft length is 6 1/2 inches longer than the T86.

Thanks for replying, knew I could count on you.
Ben

The solenoid is 12 volt. Tranny came out of a 57 Ford.

Re: T85 transmission
 

When I changed out the transmission in my 57 Ford , all I had to do was get the drive shaft shortened. The cross member mounting location is the same from T86 to T85 , you won't have to make any modifications there.
Most cities have a local drive shaft service or shop that can make up the drive shaft for you. Just bring in the measurements and your old drive shaft , make sure the transmission end of the old drive shaft also fits into the output shaft of the T85. Just slide it in to be sure. Then tell the drive shaft service to use your yokes on both ends of the new shaft. They will probably want to use new tubing rather than using your old shaft. And be sure they are capable of balancing the new drive shaft, which most shops do.

Re: T85 transmission
 

Thanks for the reply, Steve. I do have the drive shaft that went with the T85 from a 57 Ford. I am going to check length of it compared to my 55 and see if it would work. It is a step down diameter unlike the 55 which is same dia. the full length. Been way too long since I owned a 57 to remember is that is the standard shaft or not.
Ben

Re: T85 transmission
 

I’m told they made a change in the ‘bird tunnel in 56, to accommodate the T-85. I didn’t know that, so I put one in my 55 bird in place of the Fordomatic. So it should fit in a full size car. The bird had a reduced diameter drive shaft, and I used a cut down one from a car. It fit, but when bottomed the driveshaft hit the bolts for the seatbelts. I guess that why the bird had the smaller shaft originally.

Re: T85 transmission
 

CrownVic55 -

steve fritz posted the easiest and cheapest method for the retro-fit.

THANK YOU for the ID info. Maybe I will get serious one day and try to figure out FORD's manual trans usage in this period.

Re: T85 transmission
 

That's my understanding also. '55 BIRD came through with the T86 and the T85 came through on the '56/57 BIRD.

When I went to the 1949/59 MPC (Final Issue - 1964) for floor pan PN (55/57), it showed a 56/57 PN. When I went to an earlier version (MPC 7635 SEP 1959) it showed the 55 as having it's own pan and the 56/57 have a later PN (1956). Most likely (IMO) a parts super-scession to cut down on inventory.

The truth will most likely be found @ CTGI, but it makes sense. Were your belts in the 55 OEM or aftermarket?

Re: T85 transmission
 

My understanding is the Merc's used the heavier unit, starting in 55. Ford starting using the heavier unit in 56 because of the 312 that came out that year.

Re: T85 transmission
 

The belts in the 55 bird were aftermarket. Back story is the car belonged to a fireman, his room mate owned an auto upholstery shop and drove a AA Fuel car. Probably explained the seatbelts and the new interior.

Re: T85 transmission
 

That explains it. Engineering must have allowed for 56 belt install.

Re: T85 transmission
 

I believe 56 was the start of the Ford safety program, Lifeguard features. Belts, padded dash, deep dish steering wheel and visors. Might have included the door latches. Some items standard some optional. Don't know how it applied to Tbirds, curious though.

Re: T85 transmission
 

Same to the 56 BIRD -


SOURCE - https://www.hemmings.com/blog/articl...d-thunderbird/

Re: T85 transmission
 

My folks bought a new 56 Town Sedan. It had the padded dash, padded visors, Lifeguard door latches but no seat belts. Don't know if they were intended to be dealer installed and dealer didn't include them or not. Would have been nice to have them when I rolled the car but didn't get hurt anyway -from the wreck that is.
Ben

Re: T85 transmission
 

It looks as though the feature(s) came through as optional and were separate from one another -

From 1956 BIRD Option List - http://automotivemileposts.com/tbird...equipment.html


I am pretty sure the upgraded door latches were standard for the 1956 model year.

Re: T85 transmission
 

Thanks

Re: T85 transmission
 

FoMoCo started using the T-85/R11 in the heavy Lincoln cars starting in 1949. They were used with the Lincoln 337 and the 317 when it came out in 1952. Lincoln went heavy with the automatic transmissions when they came available so the T-85 wasn't used as much till later in the 50s. It was always the heavy duty overdrive transmission. They used them behind FE engines up thru 1971. It can take a lot of punishment compared to the R10 types.

Re: T85 transmission
 

I stumbled across this while Carousing With My Browser ...


SOURCE - https://auto.howstuffworks.com/1955-...-victoria4.htm

Re: T85 transmission
 

Came across this -

I believe CTCI. Those guys are experts. The T86 is a top loader whereas the BW259 is a side loader so it should be fairly easy to differentiate.

THANX! zoegrant...

Re: T85 transmission
 

The 259 transmission is a lot like the ones Ford used from 1949 up through the end of flathead production. The side cover looks similar in design. The 259 or T86 can both be found in Ford light duty applications.