Overspray in Overdrive.

[overspray]

Now----back to "Overdrive Tech".

http://www.1956goldenhawk.com/manuals/overdriv.pdf

 print out this manual for the T-85

http://www.classictruckshop.com/clubs/earlyburbs/projects/t85n/rebuild.htm

here's the rebuild page with color pics

http://www.fifthaveinternetgarage.com/parts/parts_counter_3.html

Parts and tech

http://www.vanpeltsales.com/FH_web/flathead_drawings_trans.htm

Exploded views

[AdamNDebbie]

Excellent Post.  Great information.  I used a T-85 out of a '63 Galaxie in my '51 Ford F-1.  I will NEVER build another car without overdrive.

0.67 overdrive + 3.08 Dana 44 = 80 mph @ 2200 rpm (Top speed should be some where north of 170 if it doesn't go airborne first)

[overspray]

My first 2 overdrive cars spent a lot of time at the Dairy Queen in Warren.

[overspray]

The governor--not Ed Schaefer, is a switch that closes and grounds to send power thru the relay to the solenoid.  At about 28-30 mph (cut in speed) the governor closes the circuit and the pawl of the solenoid can push out and engage the planetary gears.  This is like in the song--"I took my foot off the gas, and man alive, I shoved it on down into OVERDRIVE." That is what you do--you take your foot off the accelerator and the transmission automatically shifts into OVERDRIVE.

The governor is threaded and screws into, usually, the right rear (passenger) side of the overdrive tailhousing.

[overspray]

The kick-down switch is what reverses the overdrive back to underdrive like a passing gear.  Usually located under the gas pedal or in line with the carburetor linkage, it is actuated by stomping down on the gas pedal, which momentarily shorts out the ignition to relieve pressure on the drivetrain and release the solenoid which disengages the overdrive.

I mounted my kickdown in the firewall and made a little bracket off the linkage to push the little button.

Here's some kickdown switch pictures.  I had a Studebaker switch that I was rebuilding, here shown apart.

[overspray]

The solenoid is mounted usually on the left (drivers) side of the overdrive tailhousing.  It has 2 coils and 2 sets of points that should be checked and cleaned.  It bolts to the transmission with 2 bolts.  To remove it you must rotate it 1/4 turn, usually counterclockwise, and then it will pull out.

 Here's one with the cover off and a screwdriver pointing to the contacts/points.  A lot of these will interchange from make to make.  I have found 2 different lengths on the shafts/pawls and some have more than 2 connections.  Some are marked 12V and some are not.  Some guys use 6V solenoids with apparently no problem with 12V and some burn out immediately when 12V is applied.  I found Studebaker, Chevy, and Ford in the 50's maybe 60's usually are the same.  I have an adequate supply on hand from my trips to the junkyard.

[sko_ford]

hey mr spray i have a question ar the 49 to 64 od and non od units the same length. and whats a good price for a od i was offered one at work for 150

[overspray]

49-53 or 54 ford should be the same length for 3 speed with or without OD.  I think there is a difference in the tranny style somewhere in the mid 50's.  My 59 ford OD is different than my 51 ford OD.
55-7 chevy had the same length with or without OD
58-65 chevy had a shorter tailshaft/case on the 3 speed without OD
66-70 chevy is the fully syncronized version and should be the same length with or without OD and magically the same length as the saginaw 4 speed (and muncie and T-10 also)

$150 doesn't sound out of line, especially if it's good, for a complete tranny.  Try get the kickdown switch, relay, linkages and cable if the car is still around.

[sko_ford]

what the guy told me was that it was in 54 that they were gona put in a 64 but went 390 c6 insted and its out of the car so i dont think it has the kick down and what not but the silonod is good.  i am thinking about putting it behind the 223 in my 64 custom with the bad 3spd.