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Riddler diff cover,

techno1154

techno1154

NAXJA Member
NAXJA Member
Location
In the islands
Have anyone drilled and tapped one? I want to add a drain plug so I could change the oil without removing the cover. It have a threaded fill plug but no drain plug. What is it made from? Is it nodular iron? I do have a few pipe taps from 1/8" to 1/2".
 
Honestly not sure what they cast them with, and haven't drilled and tapped mine, but I don't see why you couldn't do this successfully. I drill and tap housings for ARBs all the time and there really wouldn't be a difference with this.

With that said, I wouldn't personally do this because oil change intervals aren't that frequent, and when they do come around I like to pull the cover and look things over.
 
I don't see why not! I bought several of the "Rockcrusher" covers and drilled/tapped all of them!
 
On the Riddler site it states that the covers are "Cast from High Grade Ductile Iron". It looks like there's really not a decent flat spot to mount a drain plug on these covers.
 
comanche91 said:
On the Riddler site it states that the covers are "Cast from High Grade Ductile Iron". It looks like there's really not a decent flat spot to mount a drain plug on these covers.
Click to expand...

That is a definite concern for me. There is no straight spot on the bottom that will make it easy to do with basic hand tools. I guess a machine shop should be able to hold it in a fixture and drill it good enough to be able to have it tapped to accept a 3/8" pipe plug. A recessed head plug should not be too obtrusive,....I think.

I will ponder over this for my next oil change.
 
That's a huge plug!!! I use 1/8" NPT for drain plugs. Carefully check the tapping depth and you can get them to "almost" flush.
 
RCP Phx said:
That's a huge plug!!! I use 1/8" NPT for drain plugs. Carefully check the tapping depth and you can get them to "almost" flush.
Click to expand...

X2! You don't need a large drain plug at all. OX covers use 1/8"NPT for their drain hole.
 
i would tap a lower part of the housing thats more protected before the cover, but i dont mind pulling them & spraying brake cleaner in them.
 
530294ee5ae5de02fc022f95.jpg


I see low pinion and high pinion fill holes.

I don't see a drain?
 
interesting.

their dana 44 diff cover does not have that drain hole, nor does the dana 60.

never thought to look at 30 stuff.
 
Jeep Driver said:
Cover the Scout logo with Jeep

Here are the 30 and 44 covers with drain plugs.

Fair price for each.

http://www.ihpartsamerica.com/store...At3watNF21Zj5ivr8yWqHDMOc4G_EqVxoCQcYQAvD_BwE
Click to expand...

These people are on to something here, something most other diff cover manufacturer need to emulate.

1) a large fill hole (most others have that).
2) a tell tale hole to let you know when the diff is full (needed).
3) a magnetized drain plug (that is a double lottery winner).

:worship:

There are some very informative posts here. Thanks guys.
 
Last edited:
I just got covers for mine i thought for about 2 seconds and decided i seem to drag that part on rocks so id rather not have a hoke there.

Ive tapped cummins exhaust manifolds so id assume this would be no problem if you realy want the plug
 
techno1154 said:
That is a definite concern for me. There is no straight spot on the bottom that will make it easy to do with basic hand tools. I guess a machine shop should be able to hold it in a fixture and drill it good enough to be able to have it tapped to accept a 3/8" pipe plug. A recessed head plug should not be too obtrusive,....I think.

I will ponder over this for my next oil change.
Click to expand...
I would say to do it proper, drill a hole weld in a threaded bung.


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