ok i have read conflicting info reguarding using 5.38's in a front dana44 and 5.29's in a rear toy axle. i tought it would be too much of a jump but i have heard of some people running them this way. i wanna know who runs them and/or who has had problems running this setup? i have a buddy who is building an 88 toy with a v6 and has a d44 planned for the front. he wants to run lower than 4.88's if possible. ok lets have it...

That combo is GearMan-approved. :D Run it.

I have never heard of this being possible...

Is there an advantage to this setup or is it just availability and popularity of those gears in their respective axles???

Thanks...

Originally posted by TyTy
IIs there an advantage to this setup or is it just availability and popularity of those gears in their respective axles???


After 4.88s Dana axles (and Ford 9 inches) go to 5.13 and then 5.38. After 4.88s Toyota axles go to 5.29. So yes, it is all about availability.

I personally wouldn't want to run them, I think that 9 points is too much, but plenty of people do (DSI comes to mind). Just make sure you ONLY use 4WD in the dirt! You could air down the rear tires a little further than the front too in order to offset the difference.

I run this set up. Never have had a problem on the road or off the road. Don't know why people are scared to run them on pavement.:rolleyes:

I'm running a simialr drivetrain setup to what your friend wants to do. V6, 44 front and toy rear. I've only had mine out in the snow so far and have had no binding problems at all, the transfer case always shifted just as easily as it did before. I've put it in 4, on some icy sections of road, but would never run it down a dry road in 4 wheel drive.

I actually ran 4.10 in v6 rear, and 4.65 n front IFS for a while and never had a problem(woudnt recomend it though). :smokin: Cant see why you would ever have a problem. Go for it.

I was going to run a similar set-up in a blazer i am bulding for mud drags, and you would want your numerically higher gear in the front so your tires would pull (spin faster). I know some serious dragsters that do that because is helps in steering in mud, but I would think you would benefit on the trails....if you set it up the way you were talkin your front end would turn slower than the rear...go the other way:) :)

been running this combo for a year now... and had teh axle in 3 different vehicles all 5.38/5.29 split's and i don't have any problems, the biggest thing i've always done is take my rear tires to about 1psi and the fronts to about 3.5 and even on hard gravel roads it's un noticable shifting in and out of 4hi...

Rule of thumb I always heard was they should be within 2%...this works out to about 1.7%. I was going to do this with a D-44 in the rear but then I found a cheap V-6 Toy rear.

Originally posted by Dirty Harry


After 4.88s Dana axles (and Ford 9 inches) go to 5.13 and then 5.38. After 4.88s Toyota axles go to 5.29. So yes, it is all about availability.

I personally wouldn't want to run them, I think that 9 points is too much, but plenty of people do (DSI comes to mind). Just make sure you ONLY use 4WD in the dirt! You could air down the rear tires a little further than the front too in order to offset the difference.

u wouldn't??????? do u build axles for a living? gearman does and says it's ok, 2% is ok, this is less, so what do u base your opinnion on? know anyone that broke using this combo? why do u think 9 points is too much? since 2% is the max and this is under, I want to know just what is in your mind when u think something like this? not to give u a hard time, just to know why u will give out an opinion, as if it were a fact....:flipoff2:

I run em", works fine:D

thanks for the good info guys:D

I too run the same setup, but only one run in the snow on it, but 100% sure no problems will ocur

Originally posted by SeaBass44


u wouldn't??????? do u build axles for a living? gearman does and says it's ok, 2% is ok, this is less, so what do u base your opinnion on?

Did I say I build axles for a living? Do you build axles for a living? MY axle builder said that it was too much difference to use on hard surfaces.



know anyone that broke using this combo? why do u think 9 points is too much?

No, I don't know anyone who broke with this combo. I don't personally know anyone who runs this combo.



since 2% is the max and this is under, I want to know just what is in your mind when u think something like this?

Why do you say 2% is the max like that is a fact? :flipoff2: Fourwheeler magazine said that 1% is the maximum difference you should run on hard surfaces (like 4.10s and 4.11s).



not to give u a hard time, just to know why u will give out an opinion, as if it were a fact....:flipoff2:

Yeah a fact. :rolleyes: That is why I said "I personally wouldn't run it". Did you have anything useful to contribute Darren? :rasta:

It sounds like High5 got enough people running this combo to sleep soundly at night and if you want to run low gears in a Dana/Toyota combo this is the only option, but I would still rather run matching gears.

[QUOTE]Originally posted by Dirty Harry
[B]





Why do you say 2% is the max like that is a fact? :flipoff2: Fourwheeler magazine said that 1% is the maximum difference you should run on hard surfaces (like 4.10s and 4.11s).

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Oh ya Fourwheeler magazine is the place I listen too.........gearman don't know jack.
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Did you have anything useful to contribute Darren? :rasta:

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No not me:rolleyes: :rolleyes: :rolleyes: these guys run this combo on the rocks , rubicon, same as pavment and u tell the guy to only use it in dirt? that in my opinion was not "useful" but I didn't say anything before:flipoff2: :flipoff2: :flipoff2: u have a good day, I'am only allowed on this bb to piss 99% of u guys off.....weren't you told that? is "wern't" a word? did I spell it right if it is a word:D
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Originally posted by Dirty Harry

Why do you say 2% is the max like that is a fact? :flipoff2: Fourwheeler magazine said that 1% is the maximum difference you should run on hard surfaces (like 4.10s and 4.11s).


there difference between 4.10 and 4.11 is .2%. You don't just subtract, you must divide. (4.11-4.10)/4.10 = .00244

Originally posted by Ben W


there difference between 4.10 and 4.11 is .2%. You don't just subtract, you must divide. (4.11-4.10)/4.10 = .00244

4Wheeler can't do the math:eek: LOL, I didn't bring it up, cause I knew he would see that wasn't 1%.............he he

Originally posted by Ben W


there difference between 4.10 and 4.11 is .2%. You don't just subtract, you must divide. (4.11-4.10)/4.10 = .00244

Uh... so are you saying that .2% isn't within one percent? :confused: The 4.10s and 4.11s are just an example of what they said was acceptable.

and you would want your numerically higher gear in the front so your tires would pull (spin faster).
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did i miss somthing here or what???

Originally posted by benwa35
and you would want your numerically higher gear in the front so your tires would pull (spin faster).
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did i miss somthing here or what???
he was talking about "mud drags" helps them steer...

I just took the toy out on the pavement, locked both arb's (5.39 front 5.29 rear) and both diffs blew up :flipoff2:

I didn't feel any different that it did with the toy crap in front, go figure...

Originally posted by Dirty Harry
Did I say I build axles for a living? Do you build axles for a living? MY axle builder said that it was too much difference to use on hard surfaces.


He is probably RIGHT, but also keep in mind that we're not even supposed to be using 4wd on "hard (high traction) surfaces" at all either! :D

(I've heard <1% OK for street, <2% OK for offroad)

Anyway with that in mind, simply TURNING in 4wd makes the F/R axles want to turn a lot more than 2% difference, so <2% difference in axle gearing ends up fairly insignificant...

(and FWIW, I too run 5.29/5.38 on grippy dry rock slabs and have no problems or binding any different than when I had 5.29's F/R)

he was talking about "mud drags" helps them steer...
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i was talking about the fact that higher numerically would make them spin slower not faster.
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I just took the toy out on the pavement, locked both arb's (5.39 front 5.29 rear) and both diffs blew up

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im not even going to go there. you got big big problems;)

Get this had 5.38 in back 4.27 in front in 55 cj for 18 yrs like that when I bought it only time ever had prob was when I spaced out once & hit pavement in 4 high and drove about5 mi was bitch to get out but did never broke squat might sound like BS but it ain't