Suedes Car Club
Tech Q and A => Running Gear => Topic started by: 31Rodder on April 16, 2007 4:02 am
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Can you do a tech article on how you set up your overdrive in your A.
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I'll work on it. Here's some HAMB overdrive stuff.
http://www.jalopyjournal.com/forum/showthread.php?t=173331
http://www.jalopyjournal.com/forum/showthread.php?t=134582
I love my overdrive!! This is about the 6th or 7th car I've had with overdrive. I used the column shift tube from the 51 Ford I scored the engine and trans from, on a 39 steering shaft and box. Everything lined up great. I wired it up in the stock configuration. I'm using much taller (3.55:1) gears so I can run the flathead at low rpm on the interstate. It works good on a light (Model A coupe) car. I run 1st gear-then 2nd gear then either 2nd overdrive to 3rd overdrive or to 3rd underdrive then to 3rd overdrive. 2nd overdrive and 3rd underdrive are about the same ratio. The engine has compression braking in overdrive, but freewheels in underdrive unless the overdrive lockout cable is pulled out (only do this stopped) . You can push the cable in while moving, but only pull it out when the car is stopped. When I come to a corner, I downshift to 2nd (overdrive) and use compression braking. As I enter the turn, or slighhtly before, it automatically downshifts (at about 26mph) to underdrive and goes into freewheel mode. I hit the gas in 2nd underdrive and run her up over 30mph--let my foot off the gas and she shifts into overdrive--then back on the gas til I'm ready to shift to 3rd. In overdrive, cruising, I can stomp on the gas (actuating the accelerator kickdown switch) and drop her into "passing gear" (3rd underdrive), then, when I've passed the late model front wheel drive car, I let my foot off the gas and she shifts back into overdrive. When you park the car with the overdrive engaged, shift to reverse which automatically (mechanically) locks out the overdrive, and apply the park brake.
overspray
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I made a spare OD relay out of an old Ford relay. I took the cover off and cut out the guts and soldered wires in to plug into a new 12V bosch relay. A little silver paint, test the circuit and "voila" old looking new OD relay.
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Holy chit!!!!!!!! Not only is he a paint guru, he's a wiring expert too!!!
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nice.
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Tom--if you only knew how many times I picked up the phone to call you!!! I struggled with this and searched the net intil I found a picture diagram of the bosch relay internals. Then only after several hours of contemplating the phone call to you, I finally got it through my Norwegian processor and actually figured it out and made it work.
Check out the stress on the processor!!!
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Until now I was glad we could post pics on here. :)
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Until now I was glad we could post pics on here. :)
baah hahah, best laugh I had all week!!! haha
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It's common knowledge that norwegians have the best processors around. Oversprays even looks just like mine.
REAL MEN EAT LUTEFISK (without butter even)
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Process this--O Ball of the Eye!!
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Oh man I hope you got that off the internet. Although it does look better than the other pic you put up. :)
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:lol: Looks like twins to me..... :lol:
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i figureed id be the first one to moon the board
but then again i already have mooned most of you in public
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Oh man I hope you got that off the internet. quote]
I don't think so, he said he was going to have his girlfriend do that. It's a side of Reed I hope I never see again. :lol:
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Good thing, for you guys, I'm a loving and caring person.
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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
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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)
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My first 2 overdrive cars spent a lot of time at the Dairy Queen in Warren.
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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.
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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.
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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.
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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
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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.
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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.