R7 overdrive question

[Alshere59]

I was fixing leaks today and noticed my solenoid was leaking on my overdrive.

I have a 1940 R7 by the way. One selenoid.

So I took it loose to see about making a new gasket for it. First it will not come all the way out and now it will not go in without spring tension. I do not remember any spring tension taking it loose and now the engage/disengage lever is stuck in the overdrive position.

So is there a way to line it back up? Is the spring tension supposed to be there? If so why is my lever to disengage it stuck. It only goes halfway now.

Anyone have any experience with these. Any help is appreciated.

Al

[suntennis]

To remove the solenoid after bolts removed, as viewed from below, rotate the solenoid clockwise 30 or 40 degrees then it will be free. To install, reverse the above action. The service manual for 46 thru 54 cars provides this info as well as other good stuff for the R7 OD. Better yet is to get an OD only service manual from Neil Riddle or elsewhere.

[Alshere59]

Thanks I will give it a try. Does it mention how it lines up by chance? Spring tension supposed to be there?

Al

I will have to send off for the R7 manual.

[suntennis]

The solenoid has a shaft that may extend about 3/4 inches beyond the end of what you see, and attaches to a part called "lockout pawl". The lockout pawl has a slotted opening where the shaft of the solenoid fits. The end of the solenoid shaft is shaped something like a spade shovel . In order to get the two parts to line up, it is necessary to first rotate the solenoid clockwise about 30 degrees and then push in and install bolts. A picture would make this easy to understand. When you get the solenoid off, it will make sense. The spring you feel is in the solenoid. When the solenoid is rotated enough, it will just pull out.

[suntennis]

If you go to the web site http://www.classictruckshop.com/clubs/earlyburbs/projects/t85n/rebuild.htm

you will find some good pictures of the inside of an OD

[Alshere59]

Thank you for your help. I think I have it down now. Just need some tiome to do it.

[Dodgeb4ya]

Here are a couple pictures of the R7 trans. This OD is completely different than the newer R10 as used in the 1952-56 MoPar cars. Also the instruction for solenoid removal.The spring is under the adapter plate. Gaskets control solenoid plunger adjustment-keep your gaskets the same thickness as the old ones.

Bob

[Alshere59]

The pictures are spot on. To reassemble is the spring pressure normal? I can not feel it fitting into any slot etc when pushed back in. I would hate to try it on the road and find out it tore something up when it engages. Now for the manual to get here.

Al

[Dodgeb4ya]

The pictures are spot on. To reassemble is the spring pressure normal? I can not feel it fitting into any slot etc when pushed back in. I would hate to try it on the road and find out it tore something up when it engages. Now for the manual to get here.

Al

The solenoid as it is pushed on has no spring pressure against it. The adapter plate with the pusrod pawl spring does need to be pushed in against spring pressure. I just pulled the solenoid off and did not try to remove the plate and spring /pawl-it did not want to come out of the trans, it just popped up 1/2" as shown in the picture. My pic of the info is out of my 10" thick "All Data" master repair book. The 46-54 Plym shop manual will not give you any info on this R7 transmission. Just the later R10.

Bob

[Alshere59]

Thanks Bob

That is exactly what I wanted to know. I am waiting on an overdrive manual/book from ebid. It was only 10 dollars so not expecting alot but hoping.

Al