Limited slip?

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HarryS

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Does my truck have a limited slip? And if not, what brand/model is recommended, and how much did you pay to get it done? TIA.
 

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kurek

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Your truck has BLD either way, but yeah use your VIN to find out if it also has a mechanical limited slip. It would be labeled "anti-spin"
 

Wild one

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Does my truck have a limited slip? And if not, what brand/model is recommended, and how much did you pay to get it done? TIA.
Alot of guys go with a True Trac.I went through 2 factory limited slips in less then 12,000 miles ,dealer replaced them under warrenty,and told me they might have trouble pushing a 3rd one through,so i went and bought another diff,put a true trac in it along with 3.55 gears,and threw my rebuilt 3.21 diff in my shed,where it's sat for the last 10 years,lol.
I haven't been able to blow up the true trac yet ,and trust me i've tried :Big Laugh:
 
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HarryS

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Ok, it said I have ANTI-SPIN DIFFERENTIAL REAR AXLE. So, that's a true limited slip? It will spin both rear tires if punched?
 

crash68

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I went through 2 factory limited slips in less then 12,000 miles
Only 12K miles but how many hundreds of floggings down the drag strip? ... LOL

Ok, it said I have ANTI-SPIN DIFFERENTIAL REAR AXLE. So, that's a true limited slip? It will spin both rear tires if punched?
It's an OEM Limited slip, lack of the preload of a true limited slip so the vehicle drives smoother.
I have no issues with putting power down and spinning both rear wheels in both mud and snow, given the much lower rpm torque band of the EcoD it makes for turning on slick surfaces interesting.
 

Wild one

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Only 12K miles but how many hundreds of floggings down the drag strip? ... LOL


It had a few passes under it's belt,lol.When i took it in for the second rebuild,the service manager asked me if i'd taken the bottle out of it,so his guys couldn't spray it when they'd finished sticking a new limited slip in it,and had it out on the test drive,lol.That was the beauty of racing with the local warrenty sign off guy,he used to approve of the truck being on all the local tracks ,as he knew the truck was selling more Ram trucks come Monday.That was also 10 years ago and FCA was still actually doing warrenty repairs,now i probably wouldn't be as lucky
 
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HEMIMANN

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I THINK they used the marketing term "anti spin" for the torsen all gear AAM TracRite differentials. At least they did for mine. And used "limited slip" for the clutch differentials.

It's hard to keep track of what the MBA's are up to.

I also read FCA got rid of AAM for a cost reduction / profit improvement. a-holes
 

62Blazer

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Ok, it said I have ANTI-SPIN DIFFERENTIAL REAR AXLE. So, that's a true limited slip? It will spin both rear tires if punched?
Yes, that is the factory optional mechanical limited slip installed in the rear differential. Under most normal circumstances both rear tires should spin. However in extreme situations, meaning drastic traction differences between the two rear tires, only one tire may spin. In the most extreme case be having one rear tire completely off the ground and the other tire on dry pavement, the tire off the ground will just spin and the truck will not go anywhere. If you have one tire on ice and the other on dry pavement, the one on ice will likely spin more and you may or may not have enough power for the truck to move.
 
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HarryS

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I'd prefer one that turns both tires under any circumstance, since I only have 2WD.
 

Wild one

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I'd prefer one that turns both tires under any circumstance, since I only have 2WD.
Lunch box locker or Lincoln Locker :waytogo: :Big Laugh:. I haven't seen or heard of anybody adapting the 5 Gens locker diff into a 4th Gen yet,but i'm pretty sure it could be done with a stand alone manual on/off switch
 

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Alot of guys go with a True Trac.I went through 2 factory limited slips in less then 12,000 miles
I haven't been able to blow up the true trac yet ,and trust me i've tried :Big Laugh:

Only 12K miles but how many hundreds of floggings down the drag strip? ... LOL

Lots of 1/4 mile runs on those.

images (2).jpeg

The mechanic when he opened those diffs......lol.
 

Wild one

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Lots of 1/4 mile runs on those.

View attachment 559096

The mechanic when he opened those diffs......lol.
When i went up to pick it up the 2nd time the diff was done,there was several blackies on the road going into the dealers place that matched my trucks tires,lol. I'd also bought 4 brand new take off Sport rims with tires from them,and we'd thrown them in the box,but i was visiting with the manager and a couple salesmen in the showroom,basically having a BS session,and the young tech who'd done the rebuild on the diff was standing beside us,when one of the salemen told me to show these other guys how to do a burnout in the parking lot,and i made the comment,it probably wouldn't with the weight of the tires in the box,when the young tech perked up and said "O i think it'll still spin the tires",well the rest of us just burst out laughing ,the poor kid got all red in the face when he realized what he'd said,i told him don't worry about it,he couldn't drive it any harder then i did,but it sure made us laugh,lol.When the wifes 1320 was still getting dealer oil changes i used to tell the techs doing the oil changes to give it a hell'va blast across the parking lot,as you always got better service if they knew they could floor it and see what the car would do,you can't hurt a new computor controlled car by flooring it,but if you allow the techs to actually do it,i've found you'll always get a higher up tech doing the oil change and they'll do a better job of going over the car and servicing it.I've never had any issues with letting a tech have a bit of fun,as you'll rate higher in their books,and they'll bend over backwards to help you out,and quite often do things free that other people who are tightwads with a tech end up having to pay for.
 

EdGs

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At 6000 miles per diff, even if 1/6 of that was dragstrip passes, that would still be about 4000 passes.

Damn.
 

Wild one

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At 6000 miles per diff, even if 1/6 of that was dragstrip passes, that would still be about 4000 passes.

Damn.
Wasn't that many Ed,lol. I had a little over 700 passes on it when i sold it ,and that works out to about 70 passes per year over the 10 years i raced it. We only have about 5 months of dragstrip action here.Toronto and Mission BC run a bit longer then the Alberta tracks do,as their weather allows them a longer season,but they're not exactly close to me,lol
 
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09SilverRam

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I'd prefer one that turns both tires under any circumstance, since I only have 2WD.
BLD will start braking the wheel in the air helping with transfer, and riding the brakes a little (two foot) as you start helps it get moving. It isn’t a locker, but limited slip with BLD isn’t bad.

I had a jeep JKU with a limited slip in the back, open up front. I could cross it up (one front and one rear off the ground) and two foot it and get the single rear wheel with traction to propel me.
 

62Blazer

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I'd prefer one that turns both tires under any circumstance, since I only have 2WD.
Keep in mind the generic term limited slip uses the term "limited", meaning it can't transfer torque to both rear wheels under every circumstance. Different brands of limited slip differentials have different bias ratios, basically meaning how much power they can transfer (how aggressive they are, or how extreme the difference in traction between the rear tires can be and still keep both spinning). The higher the bias ratio, or how aggressive the limited slip, usually leads to worse road manners. Because of that it's a trade off on it handles on a dry pavement road versus ultimate traction. If you have ever driven a vehicle with a true locking differential you would understand. The factory limited slip options generally have lower bias ratios, or are not as aggressive, as many aftermarket versions. But even the most aggressive aftermarket limited slip differentials can get to the point where only one wheel will spin.
With that said, even the factory limited slip would keep both tires spinning in the majority of normal driving situations people get into with stockish 2wd trucks. Meaning wet grass, snowy roads, mild mud and ruts. Most people don't do hardcore rock crawling or trail riding in these.
 

kurek

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BLD will start braking the wheel in the air helping with transfer, and riding the brakes a little (two foot) as you start helps it get moving. It isn’t a locker, but limited slip with BLD isn’t bad.

I've been around the internet long enough to understand that everything newer than carburetors and drum brakes is bad and probably greta's fault, unless it's a heated power-adjustable steering wheel and a big-screen tv in the dashboard then it's the bare minimum necessary to not be called "a poor".
 
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