5.13s or 5.38s for 35s??

[Safari Ary]

Thanks Rich The problem around here is ruts... I figure with a 50 with the smooth bottom and a shaved 60 I should be ok clearance wise(hell, I should have more clearance in the back than I have now with the 8.25). Also I have big eyes and little tires at the moment and although I can get close to completing obstacles, my tires usually leave me hanging(sometimes literally). I'm sure I will be asking more questions as time goes by. I know I will have a post in the semi-near future about my front suspension design, and I look forward to everyone's wisdom and criticism. Thanks

Ary

 

[BrettM]

If theres one bit of misguided "info" I'd like to see stay off of the jeep forums for good, its this one.....

I'm always up for learning, but I feel you need to back up this statement since the the general consensus is contrary to your statement.

I know that many Toyota guys blow apart 5.89s, so they stick to 5.29s, and in many cases blow those apart, so they stay in the 4s.

Similarly, I have heard numerous instances of breakage on the HPD30 4.88 sets, to the point where people recommend 4.56 to avoid breakage.

 

[woody]

"Similarly, I have heard numerous instances of breakage on the HPD30 4.88 sets, to the point where people recommend 4.56 to avoid breakage."

Where was a HPD30 front axle mentioned in this thread? and who do you know who has broken a HPD30 pinion in any ratio?

 

[Beezil]

I'm always up for learning, but I feel you need to back up this statement since the the general consensus is contrary to your statement

i feel YOU should back this statement up.

the "general consensus" likes to speak in terms of "I heard"...

and the "general consensus" likes to believe all jeep info as fact, because hey! they read it on the internet.

4.88's in 30's is probably the ONLY case you can probably cite to help you in this debate....not at all what we were talking about in this thread, but if you wanna start a new topic and debate this thing, go for it!

4.88's break in dana 30's due to HOUSING and CARRIER FLEX as the root cause.

not because the teeth are smaller.

 

[JnJ]

I currently have 4.88s with 35s and wish I went with a lower gear. Just doesn't have the pull I thought it would.

 

[Hunter-LynchburgVa]

I'm always up for learning, but I feel you need to back up this statement since the the general consensus is contrary to your statement.

I know that many Toyota guys blow apart 5.89s, so they stick to 5.29s, and in many cases blow those apart, so they stay in the 4s.

Similarly, I have heard numerous instances of breakage on the HPD30 4.88 sets, to the point where people recommend 4.56 to avoid breakage.

who made the 4.88 gear sets you've seen blow up? who installed them? what were the settings within the diff? basically there are tons of scenarios that could have occured to cause the formentioned problems.

bottom line is hearsay is exactly that, hearsay. It doesnt account for much other than more uninformed decisions based upon emperical data. the problem with emperical data is the information must be distinguished from junk under proper conditions by people aware of the rules/proper ways to collect data.

ive got a friend who runs 5.38's in his d30/d44 combo behind a 304/t18/tera-low d20 and has busted a d44 shaft. youd think the weaker numerically highger d30 gearset should blow up going by what ive read above

Hunter

 

[Beezil]

The key to running numerically high gear sets in dana 30's is expert set-up, and tightening up the backlash a bit.

you want to center the pattern a touch more on the toe and root of the tooth.

but who cares about 30's?

we wrecked this thread talking about them.

 

[Crunch]

I care about 30s. I think Ary's questions have been answered well enough... I hope anyway

I have not heard of anyone breaking a 4.88 in a 30 where the housing wasn't the cause of the breakage.

I now will have 4.88s in both my XJs, one on 35s and one on 33s, both with d30s. One already has a truss and the other will have the truss before I wheel it. Wish me luck because I also like the loud pedal

Not really concerned,
Crunch

ps-2 sets of spare shafts will accompany my trail rig.

 

[mbryson]

I care about 30s. I think Ary's questions have been answered well enough... I hope anyway

I have not heard of anyone breaking a 4.88 in a 30 where the housing wasn't the cause of the breakage.

I now will have 4.88s in both my XJs, one on 35s and one on 33s, both with d30s. One already has a truss and the other will have the truss before I wheel it. Wish me luck because I also like the loud pedal

Not really concerned,
Crunch

ps-2 sets of spare shafts will accompany my trail rig.

I'm with Crunch on this one..............I've not had a lick of trouble with my 4.88's in my 'cute' axle. {working on a little more serious of a rig.........will not have a D30 or a D44--a little curious about the D50, though}

 

[Goatman]

Funny how some are talking about weak gears in lower ratios, and about 4.88's in D30's. Shows the relative newness of the commentators. I think everyone would agree that a reverse cut D30 gear set is stronger than a standard cut D30 gear set, yet the old CJ guys have been running 5.38's in D27's and D30's (standard cut) for ever.

 

[Hunter-LynchburgVa]

good point Goatman, didnt even think of it. they've been puttin 5.38's in willys since before they were putting oil filters on those 4cyl motors they had in there!

Hunter