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Mopar Rearends


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#1 Savageman OFFLINE  

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Posted March 22, 2014 - 02:46 PM

I did a little research and found out that my statement a few postings back that Mopar rearends were circa 1952/54 is false. The units found in Panzers are 8 3/4". We all knew that. These rears have a round back section with no cover. Their ID#s are 1820657 & 2070742 and they were introduced in 1957. That being said, brings up the question, What rearends were used in the earlier Copar models of 1954/57? Earlier, Mopar made a 8 1/4" but it has a 10 bolt cover. I have never seen a Panzer with a rearend cover. Also Mopar made two different bolt circles, 4" and 4.5" and 3 different pinion shaft sizes and 6 or 7 different ratios depending on application. The ratios vary from a low 4:10 to a high 2:76. Did the factory care about what they put into the new Panzers?

The time line (1957/1960) for the factory to find and purchase these so that they would all be the same is very short and unbelievable.

I got to thinking about the rearend ratios of my two machines so I went out to the garage to check but I do not understand the results. 1 turn off the rear wheel gave me 1 3/4 turns on the pinion for the 1107 and 1 turn gave me 2 revolutions on the T75. So obviously, they have different ratios but the figures do not compute and I do not know my ratios.

Did I do something wrong?

I NEED INPUT.

Dave

Edited by Savageman, March 22, 2014 - 02:54 PM.

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#2 A.C.T. OFFLINE  

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Posted March 22, 2014 - 03:21 PM

Great question!  Someone here will know. I don't


Edited by A.C.T., March 22, 2014 - 03:23 PM.

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#3 fxrs55 OFFLINE  

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Posted March 22, 2014 - 03:58 PM

the 1107 has 3.50 to 1

the t75  has 4.00 to 1


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#4 fxrs55 OFFLINE  

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Posted March 22, 2014 - 04:04 PM

On an open rear which these are, the best thing to do

with one tire in the air is to rotate the tire off of

the ground two complete turns and count the pinion

turns. If you only rotate the tire off of the ground one

time you need to multiply the pinion gear

rotations by two.


Edited by fxrs55, March 22, 2014 - 04:05 PM.

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#5 Savageman OFFLINE  

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Posted March 22, 2014 - 05:03 PM

Thanks pal. I never knew that.

#6 HANKG ONLINE  

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Posted March 22, 2014 - 05:41 PM

Did you know THEY WERE INSTALLED UPSIDE DOWN
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#7 Panzerguy OFFLINE  

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Posted March 22, 2014 - 06:09 PM

Yeah - upside down but I forgot what the reason is. Hey - when you get to be my age...........
Wow Dave, you really stirred up a can of worms on this one.
Good thread!
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#8 Savageman OFFLINE  

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Posted March 22, 2014 - 06:11 PM

I never really thought about it. What was the reason for doing that? Boy, am I getting input.

Edited by Savageman, March 22, 2014 - 06:12 PM.


#9 Chris11 ONLINE  

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Posted March 22, 2014 - 06:24 PM

If they put it the right way it would just go backwards. They had to put it that way to make the jack shaft to work. The problem with that theres never and lube to get on the pinion bearings. So you should take you tractor and lift the ass end as high as you can get it just to get some lube on the bearings. They show you how much to put in with and alen wrench and that's not a lot . The wheel bearing need lube, and carrier. so you may want to do some Joey Chitwood show with you panzer once and a while.


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#10 Panzerguy OFFLINE  

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Posted March 22, 2014 - 08:04 PM

About the reason for having the rear installed upside down: 

   I knew that. I just wanted to see if you guys were paying attention. :wave:


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#11 Chris11 ONLINE  

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Posted March 22, 2014 - 08:08 PM

Dave I was told it was a 48 to 53 dodge rear end?

Edited by Chris11, March 22, 2014 - 08:09 PM.

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#12 Savageman OFFLINE  

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Posted March 23, 2014 - 04:46 AM

Chris, as for the 48/53 Dodge I am not sure that is correct. Those were 8 1/4 rears with 10 bolt covers according to what I can find. Now I am starting to understand why the drain plugs were welded. INPUT INPUT I love this site.

Edited by Savageman, March 23, 2014 - 05:00 AM.

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#13 Chris11 ONLINE  

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Posted March 23, 2014 - 07:19 AM

http://48dodge.blogspot.com/   When I rebuilt the one in my t 70 That's what I went by 48 to 53


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#14 JoeMopar OFFLINE  

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Posted March 23, 2014 - 07:30 AM

Very interesting thread for someone that doesn't know anything about these tractors. Must have been a really stout yard tractor. How much money were these new ? Anyways went on youtube and found this info, sort of goes with what you are discussing here.

 


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#15 Panzerguy OFFLINE  

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Posted March 23, 2014 - 08:22 AM

Very interesting thread for someone that doesn't know anything about these tractors. Must have been a really stout yard tractor. How much money were these new ? Anyways went on youtube and found this info, sort of goes with what you are discussing here.

 

 

Suggested retail for a basic T-70 in 1965 was $529.50. That was without the mower deck.


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