Branded Posted April 9, 2016 Report Posted April 9, 2016 I'm sure there's an simple answer but, what is the purpose of the gasket between the Bellhousing and the transmission on my 49 Wayfarer. Dave 1 Quote
49roadster Posted April 9, 2016 Report Posted April 9, 2016 Without it oil will leak from the front of the trans. 1 Quote
Branded Posted April 9, 2016 Author Report Posted April 9, 2016 I see a hole in the face of the trans about 5/8" I'd guess on the left side 2/3s the way up. Is this where oil would leak from. What's the purpose of the hole. Quote
49roadster Posted April 9, 2016 Report Posted April 9, 2016 Thats the spot. It is just the way Chrysler wanted it. Quote
Branded Posted April 9, 2016 Author Report Posted April 9, 2016 Seems odd, cant figure out the reason for the hole. I do see how it would leak without a gasket. Wonder if anyone has ever thought of putting a freeze out plug in the hole. Quote
DonaldSmith Posted April 9, 2016 Report Posted April 9, 2016 I guess that the hole in the front is for drilling holes through the case and inserting a shift rail or similar part, during assembly. Why put in a freeze plug if a simple gasket will work? 1 Quote
Branded Posted April 9, 2016 Author Report Posted April 9, 2016 I guess that the hole in the front is for drilling holes through the case and inserting a shift rail or similar part, during assembly. Why put in a freeze plug if a simple gasket will work? Guess your right, I'm kind of weird alway syco analyzing things. Quote
49roadster Posted April 9, 2016 Report Posted April 9, 2016 If it is 5 cents cheaper and you build 1,000,000 cars. 1 Quote
JD luxury liner Posted April 10, 2016 Report Posted April 10, 2016 (edited) the shift lever inside of the transmission will go into that opening as well, if you try to plug it be sure to test shift that transmision before you put it in the car. I can not remember which gear it is in to use that hole. Edited April 10, 2016 by JD luxury liner Quote
Branded Posted April 10, 2016 Author Report Posted April 10, 2016 Now that I know what the hole is for I'll just be using the gasket. Thanks for enlightening me on the reason for the hole and gasket. Dave 1 Quote
_shel_ny Posted April 10, 2016 Report Posted April 10, 2016 (edited) 1948 Dodge. Standard 3 speed transmission. Fluid drive. When I did my gasket I did not cut that hole out. (you might note that I actually forgot to cut out 1 of the bolt holes.) There was no problem with it blocking anything. There was no hole in the bell housing that aligned with that hole. I had no shifting problems. The gasket that was in there had no hole cut out for that spot. Oops, that was a lie. (see edit 1, and 4th pic) Edit 1: Original gasket had a hole. (4th pic) My first replacement gasket did not have a hole. Edit 2: Oops again. Crossed out the wrong line last night Edited April 10, 2016 by shel_ny Quote
50fordtruck Posted April 10, 2016 Report Posted April 10, 2016 I have always used the gasket, but the info in these posts was quite interesting. Phil Quote
greg g Posted April 10, 2016 Report Posted April 10, 2016 Without that gasket your car will mark its territoryand the trans will soon be making expensive noises. While on the subject of oil andleaks make sure you use a GL1 or equivilent gear oil in the transmission. Modern stuff has anti shear adiitives for helical gears that do not play well with brass and bronze, which the synchros in your box are made of. Quote
Branded Posted April 10, 2016 Author Report Posted April 10, 2016 Without that gasket your car will mark its territoryand the trans will soon be making expensive noises. While on the subject of oil andleaks make sure you use a GL1 or equivilent gear oil in the transmission. Modern stuff has anti shear adiitives for helical gears that do not play well with brass and bronze, which the synchros in your box are made of. Trans is in with the gasket. Is the GL1 used in all the transmissions, mine is the 3 speed. Quote
_shel_ny Posted April 10, 2016 Report Posted April 10, 2016 Trans is in with the gasket. Is the GL1 used in all the transmissions, mine is the 3 speed. Seems that in 49 the Dodge manual listed SAE 10-W for both the Gyromatic, and the plain old 3 speed transmission. 1948 and earlier the manual called for a gear lube in the 3 speed. Same transmission, but a different recommendation. Good advice from Greg on the Gl-1 if that is what yours uses. You should probably replace it with whatever was in there before if you were not having any issues. I think some have reported spinning too freely with 10-W oil in warm weather causing gear gnashing 1st and reverse. Others may have reported gear lube too thick when cold causing gear gnashing as things were still moving when they should stop. Quote
Branded Posted April 10, 2016 Author Report Posted April 10, 2016 (edited) I have no idea what was in the transmission. I bought the Wayfarer last August and I've been upgrading all the machanicals. So I have to decide on what's called for 10W motor oil or GL-1 gear oil. Im leaning towards 10w that was recommended by Dodge. Edited April 10, 2016 by Branded Quote
_shel_ny Posted April 10, 2016 Report Posted April 10, 2016 The gear lube that I have run across has a very distinctive smell (read stench). Much different than the smell of motor oil. You may be able to decide what it had by pulling the drain, or fill plug if you don't remember that different smell before installing the transmission. Quote
Branded Posted April 10, 2016 Author Report Posted April 10, 2016 It's been a couple months since I drained the tranny and I'm familiar with the smell of gear lube and I don't remember the gear lube odor. This leads me to believe it had 10w motor oil. Quote
49roadster Posted April 10, 2016 Report Posted April 10, 2016 (edited) I think there may be a misprint in one of the manuals. The reprint manual that I have (D1369-) from a 4-51 printing that covers D-29 through D42 calls for 10w. However the origional D-29 and D-30 manual (D13001) printed 8-49 calls for 80w in the standard and 10w in the gyro-matic. Also the 49 Plymouth manual calls for sae 80w And last but not least, the owners manual calls for 80w in the standard and 10w in the gyro-matic. Just food for thought. Edited April 10, 2016 by 49roadster Quote
Branded Posted April 10, 2016 Author Report Posted April 10, 2016 (edited) So what's everyone think, should I use GL-1. Edited April 10, 2016 by Branded Quote
Plymouthy Adams Posted April 10, 2016 Report Posted April 10, 2016 (edited) my buddy informed me I was asleep at the wheel...while the info was correct..it was the wrong thread...just been waaaaay to busy of late..need a break..thanks for your patience Edited April 10, 2016 by Plymouthy Adams Quote
dpollo Posted April 11, 2016 Report Posted April 11, 2016 (edited) The hole is for the upper shift rail, low and reverse. The lower shift rail does have a soft plug in it. You will notice that the gasket has a slot in it right below the input flange. Strange but true. Below this , but open to view, is the hole for the countershaft. If you get any leaks here, the same size soft plug will effectively seal this spot. The countershaft, when removed is to be pushed out through the rear of the case since the oil seal at this point is an interference fit between the shaft and the case. If it has been forced out the other way (through the front) a leak will often be the result. Edited April 12, 2016 by dpollo Quote
Plymouthy Adams Posted April 11, 2016 Report Posted April 11, 2016 So what's everyone think, should I use GL-1. IF you have fluid coupling and a standard three speed tranny attached, then yes, GL-1 in the gear box Quote
Niel Hoback Posted April 11, 2016 Report Posted April 11, 2016 The slot in the gasket makes it easier to change because you only have to move the transmission back a half inch or so. Slip the gasket in from the bottom, rotate it, and tighten things up. You're done. Quote
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