Tom Skinner

dansk, Correct, you have it in the correct position. Tom

Marty, In The 1941 - 1948 Chrysler Service Manual, Page 143, there is a Cut Away Carburetor Picture of the Kickdown Piston inside your Carb that isn't sending the message to kickdown your Transmission at your Governor. It is either clogged or your Points on your Governor are, or something is amiss with your wiring. The Carburetor Solution I am suggesting costs nothing but a gasket and an hours work. You do not even need to open the Top of the Carburetor (Air Horn) to Service the part I am suggesting. I was checking, testing, replacing parts, cleaning Governor Points etc., etc. until I did what I am suggesting to you my problem (Identical to yours) persisted. I even had previously replaced my entire Engine Wiring Harness. I spent close to a thousand Dollars to sort out my problem - namely a clogged Kick Down Piston in my Carburetor. Good Luck with your solution. Please post us what you did to find yours, I typically don't post a lot on here anymore so consider yourself lucky to get this information because sorting out my Transmission Glitch was a MFSOB to put it lightly. Also change your 30 Amp. Fuse at your Transmission Solenoid. Best of Luck to you. (The Wire from that Part of the Carb to the Governor is Yellow) Tom

Marty, Between the Kickdown Fixed Terminal and the Kickdown Switch Plunger words on your diagram above is the vertical Piston Housing that holds the piston I am talking about . Not The Accelerator Plunger, not the Dash Pot Plunger. Just below the words Main Body to the right moving down you can clearly see where the Fast Idle Rod words are just below is a cavity holding that piston. This has a Spring that controls your Kickdown at your Transmission, and my friend if it hangs up because of carbon or dirt you will definitely have the exact problem you are describing to us. There is about 100 parts to this Carb. Get it off the Manifold Take out the Lower housing screws and remove the plunger and switch on either side of it and (If its stuck use penetrating oil to remove it and clean out the cavity and piston and reinstall the gaskets) Make your own gaskets if cost is an issue. Dude you can do this trust me its above the Spacer Gasket words arrow there is a piston in there that doesn't show up on the Rebuild Kit exploded Views. It will take an hour and cost nothing, trust me. Take lots of pictures going in if you are not confident in yourself. You can do this, in order to become a Chrysler Guru! Tom

Marty, It will mess up the passing gear change as well. By the way I looked at your cover sheet. I played a Trumpet in High School and like Herb Albert etc. also. Dude the small amount of labor to fix that Carb Piston will save you tons of money. I spent $250 for a Kickdown Switch on my Tranny (That I didn't need) only to correct the Passing/Kickdown Piston in the rear bottom of my Carb. I may sell it on e bay, My Tranny is a '48 M5 with the single Pole Kickdown Switch which is rarer than the M6 double Pole Switch. I'll be rich someday. LOL - Not Tom

Marty C, Precisely, Marty, your tiny piston finally unsticks and drops down in your Carburetor Kickdown. Like your Manual says When you upshift everything is up, when you downshift everything is down. Try to see instead of replacing everything (Which is now big bucks) on your Transmission, Take your Carburetor apart and free up that small Kickdown Piston. The Transmission will only do what the Carburetor tells it to. Or do not, its your car drive it the way you like to. We are talking less than an hours maintenance work here. Tom

Marty C, In the back of your Carb where the yellow wire goes is a switch with a piston inside. If it hangs up because of dirt affecting its operation you will have this problem. I believe its called the kickdown switch right inside the carb. Dis -assemble the carb clean out the cylinder and the bake light/plastic piston and re-install. That should correct it. another thing. sometimes the kickdown switch on the Tranny will hang up, you can remove the 30 Amp fuse from the Transmission Seleniod and re-install it I hope this is the solution I had similar problem and put a new kickdown on my Tranny and didn't need to because it was the Carburetor not responding to the Tranny Switch, because it was clogged up. Install a Gas filter to prevent future gunk ups. There is a long trouble shooting process in the Service Manual to run down the actual problem but dollars to donuts you probably have a gunked up Carb Kickdown piston Tom

OK Gents here's the tips: I went on the AACA Thread to get this information. I will mark this Thread as solved afterwards. In order to remove the Master Cylinder there is a Pin/Rod at the front of the MC. Use a 13/16" Open Wrench to push the Retaining Clips off the Pin Ends in order to remove the Pedals. If need be use JB Blaster to loosen every Bolt up to and including the 2 Brake Lines coming out of the back of the MC. One Line supplies the front Brakes the other the Rear Brakes. Have a Drain Pan to catch the Brake Fluid after removing the Lines or the Front Push Rod. Remove the Bolts and Replace the MC. by reversing the steps. The Service Manual speaks to this but to have the tips to remove the Retaining Clips without them spinning and staying on the Pin/Rod is very helpful. Re-install the Pin/Rod with a Mash Hammer if a Press isn't available (LOL) be careful not to Monk up the Pin ends. There is a MC Bleeder Tool (It Looks like a syringe) to Bleed the MC before bleeding the rest of the System. So there it is Easy Peasy. I was just looking for some simple Tips. These could benefit others that would like to replace their Master Cylinders without any reservations as to skill set. I know Rich likes to Push The Ammco 1750 and MT19 Tools for adjusting Brake Shoes but they really aren't necessary unless you have $600 or more to throw away for a tool you may only use once or twice in your life. In addition to that you would be upside down real fast with your old Mopar paying someone else to monkey with it. Unless the Mechanic is 60 years old or better and know what he is doing with these old Shoe Brakes or a Truck Mechanic with Shoe experience. For now I am holding my own enjoying still working on and mastering every little thing my Chrysler throws at me, it is a tremendous privilege to continue be able to do so. Tom

Rich, I have done all of the above in your previous post. I use the homemade tool to adjust the shoes with the feeler gauge .006 around Heel and Toe. I also checked shoe wear with chalk on test runs and removed the drums several times to re-adjust Heel Toe to satisfaction. My only thought is shouldn't the tires actually skid when slamming the brakes on without one pumping action? That my friend is why I am questioning the strength of my Master Cylinder. The advice I seek here from another old Mopar War Horse like myself is: What to disconnect first to start the MC Re-Build or replacement. Roofus came close with his description of shifting the axis of the pedal etc.. I will wait a week or so for a seasoned explanation - sort of step by step, or just plow ahead on my own next week. I even have the bushings - if needed to replace on the MC Pin so I don't lack parts just some simple start finish tips to avoid the usual stupid stuff that may pop up as is usually the case when working on our old buses. Not being so young my bark is getting thin so I have to wear leather gloves so as not to cut myself. LOL. The Ammco 1750 and the MT19 Tools are best to own but not necessary if using the tool I used, (Which I will admit takes several tries) because the homemade tool is not as accurate. All in all having done Shoe and Wheel Cylinder brake jobs on old Chryslers over the years I sort of have a knack for it. Thank you for your input. By the Way the Cam Nut is 9/16" as you said above The Anchor Bolts are 7/8" Wrench. The real problem I see is the old brake lines going into the back of the MC need PB Blaster for sure as well as everything looking kind of crusty so as not to break anything - especially brake lines. Tom

Rich, I have owned 1948 Chryslers (see above - plural a s at the end of Chrysler for 50 years) I always bled my brakes every other year or so. I just replaced all of my Wheel Cylinders and Shoes and adjusted them to pretty good satisfaction, however, the slam the brakes on skid test doesn't work unless I pump the Brake Pedal and then it comes up hard and firm but doesn't skid. I believe the MC is original on my present Chrysler and may need rebuilding or replacing. I have good brakes now, however I feel they should/could be better. That being said thanks for your input, I can and will finish the job myself as I am still stout enough, I just need some technical input as to where to start and a little step by step advice as to what I may need to look out for that might trip me up. Tom

Gents, Having owned 1948 Chryslers for 50+ years I have never rebuilt, or replaced a Brake Master Cylinder. I have 3 Questions: 1. Does the Master Cylinder need to be out of the car to rebuild it, (The Serv. Manual speaks to this) or is there room to replace its inner parts with it in the car. 2. Would you rebuild it, or replace it if you had parts for either (a re-build or replacement). 3. Go over the part about replacing the inner parts with it in place, as opposed to just pulling the floor pan and whole MC out and having to press out the Pin etc. It would seem to me if it could be re-built in place it would save a lot of labor. Thanks in advance for any feedback. Tom

Ffreeb, I would start with a hair blow dryer first much like you might to take wrinkles out of a headliner. An Iron may melt your project, A Gentle easy Heat might suffice without damaging the plastic Tom

I like what I heard and saw, Old Timer sharing his knowledge, what could be better? Tom

There is a Fluid Drive Guru on here called DodgeB4ya. He can say for sure if there is a break in period on the carbon seal or not. I have owned several 1948 Chrysler's with Fluid Drive since 1974 and none of my Seals have leaked. When reading the Service Manual there is an extreme caution not to scratch or score any surface the Carbon Seal rests in. I hope that a break in period is all you need to stop the leak. I am not sure if the system is pressurized, so pressurizing it to 15psi may not even be necessary. I hope someone can help here, I sometimes wonder weather I should buy the Seal Kit for myself, but being 68 I am probably running out of time to even work on a Fluid Drive Torque Converter without the help of another. I did buy a complete set of Fluid Drive Service Tools years ago and have them all for my Unit, but time rolls on and it is unstoppable. I hope someone here with more knowledge can chime in. I hope your system is OK and turns out that pressurizing it is not necessary for the Unit to work. By the Way Nice Homemade Tool ! Tom Huntersville, NC.

Rich, Great advice, and keep an old soft paint brush to brush away any residual wax build up around ornaments and Lettering. Tom

OK, For those that want to straighten their Carb Horns, from: Collector Car Restoration Bible, by Matt Joseph, Copyright 2005, Pages 166, and 167. Edited for brevity by me. "Warped Bowl Covers can be Hammered Straight, Heating a Bowl Cover to 350 Degrees in an oven for 30 minutes and C Clamping it to a piece of Hardwood in increments. Tightening it down slowly - go easy. Also soaking the Bowl Gasket in Kerosene before installation causing it to swell. Tightening the Carb screws in careful stages down to 16 -24 OZ each (I don't even know how to do this). So there you go everybody has their own solution. I sanded mine on glass, didn't take much off and put a new gasket on. Wala no leaks. So I guess instead of us being obstinate about the method used "Its whatever floats your skirt" LOL Tom