Pin or strut type synchro

[al3xcooktattoos]

Well, gentlemen, I’m hoping you can all help me again

the 1947 p15 is in the shop with the driveline blown apart, and I’m told I need new synchros. 
i would just ask my mechanic, but he’s out of town til next week, so my question is this. 
How do I know if I have a pin-type, or a shaft-type setup? I’m hoping to order the right part before he gets back into town.   My trusty Plymouth service manual doesn’t say which went in which car.  
 

it’s a three speed manual bolt-action-theft-deterrent tans??

 

thanks guys!

alex

[greg g]

When I had my overdrive done, I learned that the my setup would have the pin type synchro.  My trans is from a 56.  I can't rember if I was told that the switch over was done in 55 or 56.   Don't know if that helps you any, but the 47 should have the non pin assuming is the correct trans for 47.  The 46 trans that was in my car didn't like to downshift  from hi to 2nd above 25 mph.

[Dodgeb4ya]

If it is a pin type "PT" will be stamped into the machined flat area by the side of the shift cover.

You will need to clean the surface of any grease or corrosion th read the small lettering. Date of manufacture will be there too.

Car Pin type syncro's started believe after 1952 or 53.

[D35 Torpedo]

What type is better?

[Dodgeb4ya]

Pin type if in good condition are much smoother shifting.

[al3xcooktattoos]

Thanks for the input guys.. 

after talking to my parts guy, I am starting to lean toward a rebuilt transmission, or maybe even an upgrade. I would love to be able to do highway speeds, and I plan to really drive this thing, so it may be a better option. 

does anyone here have any experience with a 4 or 5 speed upgrade, or a line on a solid rebuilt 3 speed trans?

[FarmerJon]

A number of guys have swapped in 1990s era t5 5 speeds, I am sure someone will point you to some resources. 

There are also Borg Warner Overdrive transmissions (r10g1) from '52-56ish plymouths that will more or less drop in, but are not as common to find anymore.

This is the route I am taking down the road, since I love my column shift. 

 

Not trying to come across too harsh, but I have seen a number of people mention not being able to drive highway speeds in these cars, and this is a misconception, unless you consider "highway speeds" in excess of 80mph. 

I drive my mostly stock '48 (3 speed still, 3.9 rear, dual exhaust) to work 1-3 days a week and routinely run 65-70. The main reason I dont run it faster is two fold: speed limit is 60, and the front end starts getting uncomfortably shaky above 70.

'49 and up cars have 3.73 rear gears, so they should be turning slightly lower rpms at the same speeds. 

These cars are not Model Ts, limited to 32mph.

Embrace the highway song of 3400rpm, it is natural, it is normal.

[DJK]

4 hours ago, al3xcooktattoos said:

Thanks for the input guys.. 

after talking to my parts guy, I am starting to lean toward a rebuilt transmission, or maybe even an upgrade. I would love to be able to do highway speeds, and I plan to really drive this thing, so it may be a better option. 

does anyone here have any experience with a 4 or 5 speed upgrade, or a line on a solid rebuilt 3 speed trans?

Check out "Russell's Automotive" for T5 - 5 speed adapter for 1933-1959 Chrysler products with flathead 6 engines.

[Sniper]

8 hours ago, DJK said:

Russell's Automotive

 

https://www.5speedadapter.com/

[al3xcooktattoos]

Thanks fellas, 

it looks like I need the two stop rings and synchronizer springs and I’m having a hell of a time finding them.  Do any of you have a line on trans parts, or a rebuilt transmission? 
anyone on the west coast you could recommend? 
is it even worth rebuilding this thing?

[DJ194950]

Not a personal recommendation but this company still had some parts and repair kits for the Mopar three speeds  and may have some of the special OD parts in stock back about 5 years ago.

 

A&A Transmission

Stockton Ca.

 

209-466-2764

[kencombs]

Find your part number(s) and search eBay.  There are usually several listed.  Not cheap, but available.