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Diff lock

khaledsamy36

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SierraHD17 Senior Enthusiast

SierraHD17

Posted
Posted

An open rear axle spins both tires in a straight line if you get the weight distribution on it right.  Doesn't happen more or less on anything where you don't have independent rear suspension.  A little drag one way or another and voila, both tires.  Big difference between that and something that actually locks the axles together.. even the G80 does that technically.  It's just not the best at doing it reliably.  For the average guy the G80 works great and will get you going with one tire on sheer ice and one on dry pavement.

rah7777777 Enthusiast

rah7777777

Posted
Posted

Open diff in a straight line with hard acceleration or rain/snow and only thing moving is that right rear tire, left rear is just sitting and waiting around haha

At least that was how my 02 acted with an open diff. 

I HATED driving that truck in any icy weather with the open diff. 

 

I can't say much about how reliable the TrueTrac is though, I only had it in for about 3 years before I sold the truck. 

but in those 3 years, it was rock solid!

 

My new truck has the G80, so i'll roll with that, but with the AWD system i'm not too worried about it. 

US Dashworks Enthusiast

US Dashworks

Posted
Posted

IMO i hate the G80 "auto locker" if you high center the frame on snow like i have plowing.... that rear diff will NOT lock. Give me a mechanical locker any day of the week. i understand why they dont though. people would accidentally leave them engaged and grenade their rear ends....

Supreme Pizza Senior Enthusiast

Supreme Pizza

Posted
Posted

I'm a big fan of locking rear ends. I have had FWD cars with LSD that worked very well. 

 

 The only issue I have with my current vehicle, is that the rear end doesn't like to unlock. Once its locked, I often have to move forwards and backwards while turning the steering wheel back and fourth. I wonder if I need to change the fluid. 

 

    Anyone have any recommendations on the rear end fluid for an '03 'Burban? 

M1ck3y Senior Enthusiast

M1ck3y

Posted
Posted

Pretty sure its a difference of 100 rpm, at least that's what it is with my 17.

 

Whatever you do, don't give it too much throttle when your not moving on ice. I did that with my 2010. Drive wheel was on ice, and when it locked up the other wheel which found pavement. It literally sounded and felt like it blew up. Never worked right after that.

 

Really wish the Silverado had an electronic locker. Auto is great on ice. But in my mind I either want or need 4wheels active or two wheels active. No in between crap. I'm not worried about fuel economy unless I'm driving in ideal conditions, and on the highway. 

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