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post #1 of (permalink) Old 03-29-2001, 08:01 PM Thread Starter
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Dana 30 strength?

My friend just replaced his engine, lift and tires on his CJ5. He now has a 360 with 38'. He dealt with the AMC 20 by buying a set of 1 piece axels, but has not done anything about the front. I approached him about this and he doesn't think it will be that bad. I told him it is an accident waiting to happen! Is he right or am I right?
Thanks for any imput,
Chris
P.S He went hardcore with the smaller engine and tires so I do not think his driving style will change.

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post #2 of (permalink) Old 03-29-2001, 08:27 PM
 
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Re: Dana 30 strength?

chances are with that much nut under the hood and that much rubber even the one piece axles might be stressed the d30 will probably break axles like iron mike breake noses

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post #3 of (permalink) Old 03-29-2001, 08:32 PM
utahjeepr
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Re: Dana 30 strength?

Tell him to start putting money aside for new axles. With 38's and a 360 he's gonna eat the Dana 30 AND the AMC 20. Even if he drives with a feather light foot he's gonna tear them up. Might survive if it was strictly to look "cool" on the street, but if he wheels it he's absolutely positively gonna break 'em.

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post #4 of (permalink) Old 03-29-2001, 08:34 PM
 
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Re: Dana 30 strength?

he will break alot of stuff, some of which will be parts to his front axle.

Ive looked at a couple of dana 30s, everyone has shown wear like ovalized U jpoint saddles, none had larger than 31 inch tires, that axler is marginal at best for a stock Jeep, anything added tires/engine/gears/locker pushes it to the junkpile in my opinion.

he is at dana 60 territory with that engine and rubber and foot method.

he will learn., slowly or quickly, its his rig, let him learn his own way

OzarkJeep

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post #5 of (permalink) Old 03-29-2001, 08:45 PM Thread Starter
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Re: Dana 30 strength?

He did not have a problem last year with 35' and a 304. He has also changed his gears from 3.45 to 4.10 to compensate for the larger tires. I told him that he is going to have problems but he just tells me that he knows a guy with the same setup and he has no quarrels about it. I told him it is better to be safe then sorry, but I guess he is too thick headed!

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post #6 of (permalink) Old 03-29-2001, 08:50 PM
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Re: Dana 30 strength?

This happened behind a 258, so imagine what the 360 will do. It's a D30, and the jeep was running only 34" Swampers. Stripped the teeth off the ring gear like an ear of corn. Oh, and this was his 3rd axle winding up like this, he's now swapping to a D44. Even though he's a mechanic and can setup his own gears, he still hates doing it time after time.



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post #7 of (permalink) Old 03-29-2001, 09:13 PM
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Re: Dana 30 strength?

Sounds to me like I wouldn't worry too much about it. He'll find out soon enough.


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post #8 of (permalink) Old 03-29-2001, 11:52 PM
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Re: Dana 30 strength?

I blew one up with my 258 and one with the 304. I was running 33s at the time. Not had any problems with the new 44s and 35s. He'll find soon enough...


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post #9 of (permalink) Old 03-30-2001, 05:50 AM
 
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Re: Dana 30 strength?

drive it till it breaks then worry about it!

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post #10 of (permalink) Old 03-30-2001, 09:47 AM
 
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Re: Dana 30 strength?

He is running basically stock axles with tires twice as heavy as stock (or more) and the weight is 4" farther away from the center of the wheel. That is a lot of force on those teeny axles. Further, when you go to higher axle ratios, you weaken the axle some because you have less tooth contact (or do I have that backwards). Finally, the thing no one brought up, is has he done anything to increase braking ability. Tires that big really increase breaking distance and first and foremost should be safety.

Jay

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