Main Caps for 3rd member

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straightlinespeed

straightlinespeed

Sometimes I pretend to be normal
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Im starting my build on my 741 case for my spare set of gears. The case that didnt come with any main caps but my brother had a set of caps laying around so I grabbed them. One side matches up perfectly, but the threads on the other side do not thread in the same distance as the housing.

I spun in the adjusters to see if they would work and I got them about half way in on both sides before it got to tight for me to do by hand. I did this with just the bare housing, I didnt go further with the spanner wrench. Oh and the pic the threads do line up, I just have the cap loose right now.

Do any of you think this is going to be a problem?

View attachment IMG_20150613_203043408.jpg
 
we did not have any luck with caps from a different rear end working...
 
I'm just gonna come out and say that................housing is junk.

That is, unless you have some method of obtaining blank caps, chucking it into a fair sized lathe, and threading the new caps.
 
67Dart273 said:
I'm just gonna come out and say that................housing is junk.

That is, unless you have some method of obtaining blank caps, chucking it into a fair sized lathe, and threading the new caps.
Click to expand...

Agreed. I have measured the cap depths from a few different chunks and have yet to ever find any of the same dimension. Some I have measured vary a whole bunch from one side to the other so if you swapped them around they wouldn't work
 
what most people don't know is you have to have the ORIGINAL main caps that came with any rear differential case whether it be-- Chrysler ,Ford , GM , Toyota --- these caps are line-bored from the factory -- same as main caps on an engine --- that is why they cannot be switched side to side when assembling a differential.
and why you cannot take caps from other cases to fit the one you have --- I see cases at swap meets all the time without caps -- nothing more than scrap metal -- stay away from these.
 
An expensive fix would be to purchase 2 Mark Williams billet steel caps and have them machined to fit. Overkill for low HP applications.

http://www.markwilliams.com/detail.aspx?ID=609

Install instructions -

[ame]http://www.markwilliams.com/servicebull/sb0050.pdf[/ame]

Be cheaper to find another complete third member. John
 
SGBARRACUDA said:
Hell if you were closer I'd give you a 741 case!
Click to expand...

Me too...

Shipping from FL to MN is about $30-45. Might ask around to the mopar people in your area. Seems nobody wants the 741 case, which is quite funny.
 
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