Locker vs. Posi - Newbie has questions, thanks!

[warmblood58]

I picked up a '94 e350 IDI with 158,000 ad hope to convert to 4x via a Ujoint kit one day but until then, I would like to convert the rear diff Dana 33 to either posi or a locker and have not done this previously in my mechanical past - ran into a former Ford service manager friend who advised against the locker and advised to just pull the carrier and install a posi carrier - is it really that simple? I think a locker would be fine too and let's face it, unless we are actually 4 wheeling, most of the time, 4x is not needed so any advice here - has anyone done one or the other? Thanks!

 

[FishPOET]

Do you plan on driving in snowy or icy conditions?

 

[FishPOET]

A selectable locker is the way to go.

 

[1leglance]

Not sure where you live but in light conditions like snow, forest roads and such a posi-traction setup is nice as it will be there to help in an instant.

However I really like the idea of a select-able locker and adding a really good air setup like the Extreme Outback stuff to provide the air for the locker and tires.

 

[WrenchMonkey]

If you have the money to throw at it, yes, a selectable would be great!

But replacing the carrier (with either an ARB-type selectable, a full-case Detroit-style locker, or a factory LSD like your friend suggested) will not be as simple as pulling one and dropping in the other. The differential gears must be reshimmed for proper backlash, engagement etc. A very technical job. Gear setup is the only thing I've paid someone to do to my rig.

If you really want simple and do-it-yourself, you'll have to look at a lunchbox locker (lockright, aussie, etc) that replaces only the spider gears, and not the whole carrier. That will pop right in.

But be aware, as was mentioned, a full-time automatic locker can be a handful in the snow and ice. It's not impossible to manage, I've daily-driven mine through ten Ohio winters, but it is a handful.

Robert

 

[Betarocker]

I run ARBs on both ends, with an on board air setup. Much more predictable than a limited slip type differential; it is either open or locked. I've had the misfortune of spinning out because the limited slip decided to lock up on snow.

 

[Wood Kutter]

I really hope you have a Dana 60 , I'm pretty sure there never has been a Dana 33.

 

[Toolman]

I really hope you have a Dana 60 , I'm pretty sure there never has been a Dana 33.

I was thinking the same thing.

 

[DaJudge]

Definitely need more info. Daily driver? Driving in snow or other slippery conditions?

An auto-locker (Detroit, etc.) can be very squirrlley in slick conditions on pavement. I have one in my XJ and drive accordingly when on slick roads but it is mostly dry here in the SW. A selectable locker is the preferred choice if you can afford one. Locked when you need it, not when you don't.

Some LSDs can be almost as bad (or good depending) as an auto-locker. My Detroit Tru-Trac in my front axle locks up solid when in 4x4 drive. I am not sure I would want one in a vehicle with very little weight in the back (i.e a pickup) Not sure how the van would do. But again, you can adjust your driving style.

Some things to think about!

 

[kbeefy]

what sort of use are you planing for your van? It changes alot....

 

[LocalmotionSC]

Auburn Gear ECTED Max Locker

What about Auburn Gear's ECTED Max Locker? I learned about this locker a couple years back from a Toyota forum I belong to. Its a selectable locker that is fully locked when engaged and a limited slip when disengaged. To me this seems like the best of both worlds, but I haven't heard much talk about it or seen any build threads where it was used. Anyone have experience with this locker?

Auburn Gear ECTED Max Locker


Link to User/Installation Manual

Does anyone have any experience with this locker / limited slip combo?

 

[2kenworths]

I'm new to this forum, i have a 1998 quigley w/powerstroke running 37's and with the coil spring it keeps bottoming out any quick fix for this ??

 

[toylandcruiser]

Pretty sure Ford never used a "posi." They used a LSD. Posi is the GM name for their LSD.


ΜΟΛΩΝ ΛΑΒΕ

 

[ujoint]

I'm new to this forum, i have a 1998 quigley w/powerstroke running 37's and with the coil spring it keeps bottoming out any quick fix for this ??

Welcome to ExPo!

The answer to your question is No. Try a set of Bilsteins 1st. That will improve the handling, but its not a cure for limited suspension travel. To do that you'll have to fabricate a custom suspension or switch everything over to my system.

 

[ujoint]

Somehow missed this thread....

1st step is to properly ID your axle. Get the BOM to do this. It's on the diff tag and the pass side axle tube near the u-bolts. May have to wire wheel the frame to see it but its there. Once you can ID the axle you can get your options. You'll find them limited for us van guys. Not all 60's are created equal!