hear me out on this

[s10eater]

ok guys i want some form of limited slip on my truck.

i don't really want posi or anything like that cause i don't wanna be scrubbing my expensive tires all the time when i turn. now lisen to this idea. what if i put an air locker in the diff. it would allow me to choose when my "posi" engaged and disengaged. i think that would be an awesome idea!

 

keep in mind that my truck is strictly a street truck

 

opinions?

[Mitch]

you could find an axle with limited slip in the junkyard. I think selectable lockers are pretty expensive.

 

My TJ came with a D44 rear 3.73 gears and limited slip. I can't be the only TJ that came from the factory this way.... In fact I know of someone who has the the same in his TJ except its a D35.

[s10eater]

yes but a limited slip won't be as reliable on the track as an air locker...no?

an airlocker will make the axle "solid"

[JeepcoMJ]

arb air locker is roughly $700. good luck with the project...you will surely spend quite the penny on it, but it will be worth it for selectable lockers!

[Oizarod115]

yes but a limited slip won't be as reliable on the track as an air locker...no?

an airlocker will make the axle "solid"

 

an ECTED like CW got may be a good option as well... not sure don't nkow much about them but its an electric run version of an air locker

 

i think it can do posi/open/locked all in one? CW may chime in on that though

[DirtyComanche]

You need an overview on traction aids... Not trying to sound like an a-hole saying that.

 

 

 

A limited slip, aka; LSD, POSI, posi-trac, trac-lok, etc, allows for the tires to have different wheelspeeds within reason. Hence, you will normally not notice them on the street at all - other than when you hammer the throttle instead of a one tire fire you'll have two. They will not cause the tires to bind, chatter, scream, etc.

 

 

A locker, aka; detroit locker, ARB air locker, OX, eaton, etc, when locked do not allow any difference in wheelspeed. They will cause hopping, binding, screaming tires, etc - but ONLY when locked. Otherwise they are eather limited slips or open differentials. The main difference between them is when they lock, with ARB/OX being slectable and detroits being automatic, etc...

 

 

 

 

For your application I would recommend a Detroit Truetrac. It is a limited slip. However, it is torsion gear based (no clutch packs to fry) and works quite a bit better than a typical LSD. You won't notice them on the street at all - I had one in my front end for a while. But they do a very good job of providing traction.

 

 

I think only track cars run full lockers ever. They just aren't realistically needed on the street. On the street suspension design is more relevent to traction than a traction aid.

[CWLONGSHOT]

You need an overview on traction aids... Not trying to sound like an a-hole saying that.

 

 

 

A limited slip, aka; LSD, POSI, posi-trac, trac-lok, etc, allows for the tires to have different wheelspeeds within reason. Hence, you will normally not notice them on the street at all - other than when you hammer the throttle instead of a one tire fire you'll have two. They will not cause the tires to bind, chatter, scream, etc.

 

 

A locker, aka; detroit locker, ARB air locker, OX, eaton, etc, when locked do not allow any difference in wheelspeed. They will cause hopping, binding, screaming tires, etc - but ONLY when locked. Otherwise they are eather limited slips or open differentials. The main difference between them is when they lock, with ARB/OX being slectable and detroits being automatic, etc...

 

 

 

 

For your application I would recommend a Detroit Truetrac. It is a limited slip. However, it is torsion gear based (no clutch packs to fry) and works quite a bit better than a typical LSD. You won't notice them on the street at all - I had one in my front end for a while. But they do a very good job of providing traction.

 

 

I think only track cars run full lockers ever. They just aren't realistically needed on the street. On the street suspension design is more relevent to traction than a traction aid.

 

SPOT ON!!

 

I agree 100%

 

The ECTED is a nice unit and I do like it. (Once it get it to work) I have one in my TJ and LOVE it. But don't really feel its necessary if you only on the street.

 

The TRU-TRAC is a nice agressive LS. Origionally designed for the front axle applications. It is also an excerllent choice for your rear axle on the street. Only really ever defeated if you lift a tire and thats not too likely on the street.

 

CW

[s10eater]

good to know thanks for the input guys. I'm getting pointed in the right direction.

 

now the question turns into should i still do the 8.8 conversion?

[JeepcoMJ]

not if you're not wheeling it. well, if it's a show truck maybe...

[JOMJ87]

From what it sounds to me is you are going to run this truck on the track some and if that is so I would do the 8.8 cause I know from experience that the turdy5 can't take you poping the clutch and spinning the tires to much. I spun the pumpkin yes just the pumpkin on the axle tubes with a 2.5 liter that is worn out in high school. So upgrade if you play or run it down a strip.

 

Cole

[87manche]

track time and a dana 35 won't go well together. The carrier is weak, it will flex and you'll spit out the spider gears.

upgrade now, THEN spend money on a traction aid for the 8.8

Or just go and find an 8.8 with a LSD. It will work well enough for what you want to do.

[Kenosha Warrior]

one thing the original poster forgot to mention is that he's tossing that D35 behind a 350cid Chev

[Pete M]

I would go find an Explorer 8.8 with your choice of gear ratio (3.55, 3.73, 4.10), disk brakes, with low miles and the factory posi. Then, if you find you don't like it, you can always upgrade to an aftermarket locker or posi unit later.

[87manche]

I would go find an Explorer 8.8 with your choice of gear ratio (3.55, 3.73, 4.10), disk brakes, with low miles and the factory posi. Then, if you find you don't like it, you can always upgrade to an aftermarket locker or posi unit later.

eggzachary

 

a Dana 35 won't even stand up to a 2.5L on the street if you launch it hard.

a 350 would mangle the internals faster than you could think about it.

Do the 8.8, you won't regret the money spent there.

[kazzx]

2 things wrong with limited slip.

 

1. Its limited

2. It slips

 

Go with a full on locker.

[87manche]

lockers aren't really all that practical on the street, if you like your tires.

They also eat up u-joints and cause some odd cornering behavior.

for a rig that sees nothing but street time, a selectable locker is the best choice, with an LSD being next.

I drive with a full detroit everyday and it's a PITA.

[s10eater]

the d35 has stood up for a few years now... but i guess its running on borrwed time.

 

yes guys I'm running a 350 with 355 horse and 405 tq.

 

so 8.8 is the way to go. with disc. i think I'm gonna have the rearend shop that I'm having install the diff build up the LSD in it. anything else i should do/ look out for?

[JeepcoMJ]

i'm running the d35 on my truck with the camaro engine...it's pushing 250 horse almost, according to the dyno, along with around 275 torque now that i reprogrammed the computer and added coil packs. that rear end is holdin up to burnouts so far...at the very least it's doing better than my tires are...

[DirtyComanche]

Behind a stock 4.0 and stock tires on the street they're on borrowed time...

 

 

I've seen it happen. But, only with the c-clip axles. Which are hilarious when they break on the street (or the trail...) :roll: .

[88MJay]

I would go find an Explorer 8.8 with your choice of gear ratio (3.55, 3.73, 4.10), disk brakes, with low miles and the factory posi. Then, if you find you don't like it, you can always upgrade to an aftermarket locker or posi unit later.

 

Well put. :cheers:

 

You can find these in the junkyard all day long for $250. Very easy swap to do too. You get 31 spline shafts, 8.8 inch ring gear and a LSD. If you ever go up into the 500 hp or 600 hp range there is plenty of aftermarket support for this diff as well since the Mustang guys frequently hit those numbers and higher.

 

On a side note... I think smallish street tires 31" and under doing burnouts is not even close to the break force of a 35" tire spinning at 20 mph in the air and then grabbing instant traction when it hits the ground. Just like jumping off a building... it isn't the fall that kills you... it's the sudden stop. :nuts:

[JeepcoMJ]

we broke one on the street in my bro's 4.0. just removed the rear driveshaft, and diff cover, pulled out all the pieces then put it in 4 wheel and drove it home FWD style :D just swapped in a spare d35 we had and were done with it.

[Eagle]

ok guys i want some form of limited slip on my truck.

i don't really want posi or anything like that cause i don't wanna be scrubbing my expensive tires all the time when i turn. now lisen to this idea. what if i put an air locker in the diff. it would allow me to choose when my "posi" engaged and disengaged. i think that would be an awesome idea!

 

keep in mind that my truck is strictly a street truck

 

opinions?

You need to brush up on terminology. A "posi" is a limited slip. Speficially, "positraction" was a GM trade name for their factory limited slip diffs. What you're saying is that you don't want a true automatic locker, like a Detroit Locker. For a street truck, I agree with you.

 

Your least expensive option is a Dana-Spicer Trac-Lok ... the same unit the Jeep factory offered as an option. The biggest downside (and it isn't big) is that the clutches wear out after maybe 100,000 to 150,000 miles, and you have to use friction modifier in the gear lube.

 

For a little more money you can get a TrueTrac, which is a gear-driven limited slip. It doesn't require special lube additives, it's a bit more aggresive than a Trac-Lok, and there's nothing to wear out. I have a Trac-Lok in my XJ, and a TrueTrac in my MJ. Neither one scrubs the tires on dry pavement.

 

I think you'll be wasting a lot of money buying an air locker for a street truck.

[Eagle]

yes but a limited slip won't be as reliable on the track as an air locker...no?

No.

 

I have yet to wheel with anyone whose air locker actually works more than about 65% of the time.

 

I am confused. Your first post said this is a street truck. Then later in the thread it sounds like this truck sees the drag strip. Drag racing is not "street only." You have to realize that the two are almost mutually exclusive. For "street" a limited slip, like a Trac-Lok or TrueTrac, is by far the better choice. If you are drag racing, the ONLY choice is a Detroit Locker. Drag racing chews up the clutches in a typical limited slip very fast, and that applies both to the Jeep/Dana Trac-Lok and to whatever Ford puts into the 8.8 from the factory. The TrueTrac locks up more positively, but even for street use it is only guaranteed for up to 32" tires. I don't know how well it would hold up to doing hole shots, and when it breaks I doubt it'll be warranteed.

 

Detroit locker. Only choice.

[s10eater]

the truck will be primairily a cruiser. but every now and then i will take it to the track just to have a little fun.

[DirtyComanche]

yes but a limited slip won't be as reliable on the track as an air locker...no?

No.

 

I have yet to wheel with anyone whose air locker actually works more than about 65% of the time.

 

I am confused. Your first post said this is a street truck. Then later in the thread it sounds like this truck sees the drag strip. Drag racing is not "street only." You have to realize that the two are almost mutually exclusive. For "street" a limited slip, like a Trac-Lok or TrueTrac, is by far the better choice. If you are drag racing, the ONLY choice is a Detroit Locker. Drag racing chews up the clutches in a typical limited slip very fast, and that applies both to the Jeep/Dana Trac-Lok and to whatever Ford puts into the 8.8 from the factory. The TrueTrac locks up more positively, but even for street use it is only guaranteed for up to 32" tires. I don't know how well it would hold up to doing hole shots, and when it breaks I doubt it'll be warranteed.

 

Detroit locker. Only choice.

 

 

 

 

I know a few guys that are heavy into the drag racing thing. Those who are hardcore run spools. Those who aren't run LSDs. I've seen no applications of detroits as they are expensive and have moving parts. Maybe guys run them, I don't know many drag racers anymore...

 

 

And on the warantee... The truetrac is sold for street/strip applications. I'm sure they warantee them for reasonable power levels if installed in a correct axle. (Ie, they ain't gonna warantee a D35 one for 300HP. That's asking for trouble) Although, in a D35 I know you ain't gonna break it first. I broke the R&P on my D30 and the truetrac was quite fine.