_shel_ny Posted March 21, 2007 Report Posted March 21, 2007 (edited) ... Edited September 19, 2011 by shel_bizzy_48 Quote
Plymouthy Adams Posted March 21, 2007 Report Posted March 21, 2007 that is a cast number...I have always found the number stamped by hand at the very top of the gear housing on a milled flat area...may take a mirror, good cleaning and a light to see it...the flat is actually on the cast iron hog head that inserts into the metal steeel housing. Quote
Young Ed Posted March 22, 2007 Report Posted March 22, 2007 Thats where I find them too. Shel look where the other end of your arrow is pointed. Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 Shel, here's a 50 rear end that Mikemaker and I have been cannibalizing for brake parts. You're looking at the top side of the center. I cleaned this with a scraper and a rag with min spirits. Mine was easy, it's out of the car. Now I know what ratio the gears are, but I was hoping for a 4.10. This rear is out of a 50 buzzcoupe. Mike, I found the other rear spring. It was right there under our noses. Quote
Jerry Roberts Posted March 22, 2007 Report Posted March 22, 2007 Nornspeed , Those 3.73 gears that you are disappointed about can be a little hard to find . I'm sure that a lot of the guys on this forum would trade you in a minute for their 4.10 's . Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 This thread was what got me going on checking the numbers on mine. It's been sitting out back for a coupla years now. Finally got a round tuit. Quote
Norm's Coupe Posted March 22, 2007 Report Posted March 22, 2007 I know this has been beat around before, but let's see if the horse is dead.My coupe is supposed to have a 373:1 rear. This is the # I find on the rear. Is this the right place to look? Counting the rearend in my coupe, I've had three of them. Two were out of the car. I found the gear ratio stamped on the other side in about the same location as the casting numbers. On those, it was just stamped 3.9. Have never seen a number stamped on any of the tops like the others pictured them. Quote
Plymouthy Adams Posted March 22, 2007 Report Posted March 22, 2007 Norm at one time here on the farm I had 5 of them and all were stamped right on the top on the cast iron hog head..of course, I will admit that I read where to look so did not bother to check if it is on the opposite side. Currently there are but two left on the farm...may have to go out and check the pinion snout to see if it is there also. Quote
Merle Coggins Posted March 22, 2007 Report Posted March 22, 2007 Nornspeed , Those 3.73 gears that you are disappointed about can be a little hard to find . I'm sure that a lot of the guys on this forum would trade you in a minute for their 4.10 's . YES!!!!!! I'd gladly trade you my 4.10 diff in my truck for that 3.73 diff. Merle Quote
Norm's Coupe Posted March 22, 2007 Report Posted March 22, 2007 Norm at one time here on the farm I had 5 of them and all were stamped right on the top on the cast iron hog head..of course, I will admit that I read where to look so did not bother to check if it is on the opposite side. Currently there are but two left on the farm...may have to go out and check the pinion snout to see if it is there also. Tim, to be honest, I've never looked at the top for the numbers:confused: . So, they could be there too. I guess they are since someone posted a picture of one. I do know for sure all of my rearends came from P15's though, and of course the one is still in the car. Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 I think the shipping $$ would eat us up between WI and CA though. YES!!!!!! I'd gladly trade you my 4.10 diff in my truck for that 3.73 diff.Merle Quote
Plymouthy Adams Posted March 22, 2007 Report Posted March 22, 2007 Just swap out the hog head...be a bit heavy but size of the box is way down..be more economical..both get what they want with minimum outlay of Maria Theresa thalers...(just learned that one, have a beautiful example at the house just given to me...) http://www.24carat.co.uk/mariatheresathalerframe.html Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 Tim, doing that, would the gear clearances and stuff all remain ok, or would the center piece need to be re-clearanced? Quote
Plymouthy Adams Posted March 22, 2007 Report Posted March 22, 2007 slipping out the hog head is simple as unbolting the driveshaft, pulling the rear hubs (may be a bit of work) pulling the axles out of the side gears..unbolt the head and remove..would however recommend that you count you splines on the axle..this would be the only concern. The preload, back lash etc etc is not touched. Quote
Plymouthy Adams Posted March 22, 2007 Report Posted March 22, 2007 seeing is believing...if all are double stamped like that..sure be lot easier identifying what is what...its tough looking at the top while in the car... Quote
Young Ed Posted March 22, 2007 Report Posted March 22, 2007 I've never seen one double stamped like that and I've messed with lots of these. I'll have to double check the 1/2 dozen or so spare diffs in the archives. Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 Thanks Tim. Merle, I sent you a PM. Quote
Young Ed Posted March 22, 2007 Report Posted March 22, 2007 Spline count didn't change until 53-54. I have an early 50s 3.90 unit in my 46 pickup that swapped right in. The cases were slightly different in a couple places so I had to use 2 washers on some studs because there weren't quite enough threads on a few studs. Easily fixed if you notice ahead of time but I certainly wasn't pulling the axles and diff back out! Quote
Normspeed Posted March 22, 2007 Report Posted March 22, 2007 Yeah, my 53 has more splines but the 3.73 is out of a 50 so should be no problem. If I ever decided to use it in my 53 I's need to use the 50 axles too. Quote
Young Ed Posted March 22, 2007 Report Posted March 22, 2007 Or just swap the side gears like Dad and I did in my 48 which has a 3.73 in it. Sadly he remembered the spline change a little late after I had the diff already installed and the axles wouldn't go in. That was a frustrating night! Turned out for the best because when we took it apart the 3.73 had bad bearings in it anyways. So I have the 3.73 in my original housing now. Quote
55 Fargo Posted March 25, 2007 Report Posted March 25, 2007 Finally found a number in this are on top of the hog head, it's a number 4, some number is after it, I am assuming the 4 is the first number as when I was looking from the back of the car, with a mirror, the point on the 4 is to the line in the center of this machined area, wish I didn't have a 4.10 or 4.30 in this car, not sure how it ever got in the car. Is there a sure fire method to check the diff ratio, by turning the back tire and counting the driveshaft revolutions. I do have another chrysler here that should have the 354 diff, will just switch the hog heads, if possible............Thanx Fred Quote
Plymouthy Adams Posted March 25, 2007 Report Posted March 25, 2007 IF and again that is an IF..the car was sold in an area where there was a pretty hilly terrrain..more than not the dealership may have requested the car delivered with 4.1 gears so as to not have to explain to a customer why is lugs up hills etc... Quote
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