TNT Dana 44a Truss install Question... - Page 3 - JeepForum.com
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post #31 of 39 Old 03-14-2014, 12:30 AM
Kur
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Just because the center section is aluminum doesn't make it a weak axle. It's actually pretty strong compared to a regular 44. Aluminum is a strong metal, especially when it is as thick as it is on that axle.

And 44a isn't the real name either. It's actually a 44hd.

The only real problem with the 44a/hd is the total lack of aftermarket support and/because of the (undeserved) stigma of the aluminum center.


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post #32 of 39 Old 03-14-2014, 01:10 AM
Timo_90xj
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R&P is stronger on the d44a, housing is prone to flexing though. The biggest issues are the lack of afternarket support, and too weak clamping force on the carrier bearing caps. The housing flex and not enough clamping force makes the bearings go bad.

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...


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post #33 of 39 Old 03-14-2014, 08:10 AM
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Quote:
Originally Posted by Kur View Post

And 44a isn't the real name either. It's actually a 44hd.
The D44A moniker was adopted mainly to differentiate between the aluminum D44 used in the Grand Cherokee and the very similar (but internally different) IRS aluminum D44 used in the Vette and Viper that was also called the "D44HD". Not to mention that the "D44HD" name was also used for a particular variation of the iron front axle.

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post #34 of 39 Old 03-14-2014, 10:07 AM
speedbucket
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Quote:
Originally Posted by Kur View Post
Just because the center section is aluminum doesn't make it a weak axle. It's actually pretty strong compared to a regular 44. Aluminum is a strong metal, especially when it is as thick as it is on that axle.

And 44a isn't the real name either. It's actually a 44hd.

The only real problem with the 44a/hd is the total lack of aftermarket support and/because of the (undeserved) stigma of the aluminum center.
I have never seen a broken steel housing. I've seen 2 broken "44heavy duty"( )housings. Cast Aluminum can't touch steel in that application.


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post #35 of 39 Old 03-25-2014, 05:11 PM Thread Starter
evan1395
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Originally Posted by speedbucket View Post

I have never seen a broken steel housing. I've seen 2 broken "44heavy duty"( )housings. Cast Aluminum can't touch steel in that application.
Its common knowledge. Do I am not going to have to worry about warping my 44a with 31-32" tires, while being locked up? Im a feather foot as it is.

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post #36 of 39 Old 03-25-2014, 06:06 PM
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Its common knowledge. Do I am not going to have to worry about warping my 44a with 31-32" tires, while being locked up? Im a feather foot as it is.
That was a response to the post at the top of the page. You'll be fine


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post #37 of 39 Old 03-25-2014, 06:40 PM
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Originally Posted by evan1395 View Post
Its common knowledge. Do I am not going to have to worry about warping my 44a with 31-32" tires, while being locked up? Im a feather foot as it is.
I have a lot of fun with my Aussied 44A and 31s.

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post #38 of 39 Old 03-25-2014, 07:01 PM Thread Starter
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Originally Posted by ejschultz View Post

I have a lot of fun with my Aussied 44A and 31s.
Good to know. Because thats the exact same setup i intend on getting.

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post #39 of 39 Old 01-15-2017, 07:03 PM
chimpanzee
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Quote:
Quote:
Originally Posted by ejschultz View Post

I have a lot of fun with my Aussied 44A and 31s.
Good to know. Because thats the exact same setup i intend on getting.
That's what I was going to do. Get a TNT truss for Dana 44a, along with ZJ brackets.

However, I ran into below comments about the Aluminum housing "heat cycling" eating carrier bearings:

http://mallcrawlin.com/forum/showthr...na-44a-options


Quote:
I have had the same 44a for six plus years now. It has seen hell under my rig and next week I will be pulling it out in favor of a trussed XJ 44 with 33 spline shafts and a Detroit. You can get alloy axles for it but IMO it is not worth it. The reason I say this is it is my theory that you want the axle to break if anything. Upgrade the shafts and your carrier becomes the weak link.

If I could get a full case locker for the 44a I would keep it even longer. When you re-gear the thing make sure you get a guy who knows what he is doing. Because the aluminum center section expands and contracts so much with the heat caused by regular use it is common for them to eat carrier bearings faster with the Aussie installed and regular street driving.

The aluminum center and weak tubes aside the 44a is a strong rear axle. It will hold up to as much if not more abuse than a regular 44 or 8.8. Put a truss across it and a skid under it and the 44a will live a long life under your trail rig. It would just for me to split the carrier as I drive mine to and from the trail.
The previous owner (ace mechanic) of my '96 ZJ is telling me the same thing as above, he had the Dana 44a differential rebuilt because of the "heat cycling" flaw


I'll either go with the

1) Ford 8.8"
out of a Ford Explorer, from a junkyard with IRO ZJ bracket kit)

2) East Coast Gear Supply Dana 44

built up with ZJ brakets

http://eastcoastgearsupply.com/i-198...30-spline.html
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