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Old 03-18-2012, 02:22 PM   #1 (permalink)
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dana 44

Is it okay to run 40" on a front dana 44 and a dana 60 rear?
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Old 03-18-2012, 02:25 PM   #2 (permalink)
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No.
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Old 03-18-2012, 02:26 PM   #3 (permalink)
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Depends. What are you going to wheel on ? If it's big rocks.......................................... , if it's mud..... go for it.
This applies to the D44.

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Old 03-18-2012, 02:31 PM   #4 (permalink)
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Are you going to be doing nothing but mall crawling?

If yes, then it'll be fine.
If no, then it'll



The Dana 44 won't hold up in rocks with 40" tires. It might survive in mud depending on motor, gear ratio, and whether or not it's locked, but I wouldn't expect much.
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Old 03-18-2012, 03:58 PM   #5 (permalink)
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what is the max tire you guys would suggest with a dana 44 front axle
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Old 03-18-2012, 10:24 PM   #6 (permalink)
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Quote:
Originally Posted by macmulharny86 View Post
what is the max tire you guys would suggest with a dana 44 front axle
Are you sticking with the Dana 44 to save money or weight?

As a general rule the 37" is a good max and 35" is what I'd suggest.
Having a light wheel and tire combo helps the 44 live a little longer, that and a light foot.
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Old 03-18-2012, 11:04 PM   #7 (permalink)
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thanks mr. N. I was looking to save money is why i was gonna go with the 44. I have read your webpage about the different dana 60's out there and I might just save a lil more and go with a HP dana 60
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Old 03-18-2012, 11:51 PM   #8 (permalink)
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Quote:
Originally Posted by Mr.N View Post
Are you sticking with the Dana 44 to save money or weight?

As a general rule the 37" is a good max and 35" is what I'd suggest.
Having a light wheel and tire combo helps the 44 live a little longer, that and a light foot.
Mr.N is always a wealth of good advice and information.




==========================
I will add to this discussion that the installation of say a jk 8.9" R&P into a LP dana 44 is a way of adding some additional strength to a differential that with such an upgrade imho does have some wiggle room, more wiggle room than it did for a long time.

Also id throw out there that almost every front R&P that ive broke had been while trying to do something in reverse. dont rule out a low pinion front end especially if you are low enough where HP causes more issues than it resolves.

there are upgrades and things that can be done to make a D44 live with larger than 35" tires but unless you pay attention and are willing to address the details and the weaknesses of the d44 the metal shavings will fall as they may.

I have a friend who ran 38.5's on a scout II with 115:1 gearing and tbi 350 CTMs and alloy shafts all around the rubicon, fordyce and barret even down at the hammers. he finally shattered the R&P didnt break it just had hair line cracks through out.

I've run a D44 front on 36" iroks and 37 BFG krawlers with no issues 130:1 gearing and an AMC 401. heck i even had a D44 rear and i towed a dead FJ40 on 39's from WH3 to meadow without breaking but over the years i had upgraded everything to alloy this and ctm that along with load bolts ont eh rear bearing caps. do i recommend it NO but it lasted 8+ years of 10-15 trips a year worth of abuse. I wish i had built a D60 from day one for the rear as to the front end ......... Mr.N is right they have their limitations and shortfalls as does every axle choice.

Ive pushed my hybrid dana 44 pretty hard this last year and see no issues with it holding together with 39's or 40's. the JK R&P is a key part to that as well if i was sticking to 40's id look at a load bolt also but its a hybrid and its not your run of the mill BJ thin wall 2-3/4" tubed dana 44 front end. its setup with king pin 60 knuckles 3" x1/2" wall tubes and 35 spline dana 60 shafts. after 36's the std dana 44 R&P is the weak link.....with 37's the ball joints, with upgraded BJ's & the JK R&P you open the door to alloy stub shaft and ctm issues around 38.5's. with KP knuckles, D60 shafts and JK R&P smaller 40s, add the load bolt 42's... but then again why didnt you build a 60

40's on a stock ball joint 44 is not a good choice though


heres what i did with my hybrid front end upgrades

heres another thread talking about D44 ball joint upgrades
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Last edited by ddestruel; 11-01-2012 at 11:35 PM.
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Old 03-18-2012, 11:55 PM   #9 (permalink)
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Hopefully I can be an example.... I planned on running 35s so I bought a front 44 then I got the bright idea to give some 38s a shot and see if I like em. Well I like them so now I pretty much have to find a 60 before I make all 44 stub shafts go extinct...
Just skip the 44 and go to a 60 with that size tire it'll be cheaper in the end.
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Old 03-19-2012, 08:39 AM   #10 (permalink)
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They might hold with RCV's in the front D44 and 35 spline shafts in the rear, but you'd be pushing its... just go with a HP 60 front and 14b rear for 40's.
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