??? 4x4 ???
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??? 4x4 ???
Hi guys!Please explane me,I read that Chevrolet Silverado have a Differential:automatic locking rear.Is it same with mine F350,2006?I think my F350 dosen't have locking system,its 4X4 but its not lock all wheels.Do you know what i mean?When I drive 4X4 and one wheel lost traction I understand that differential not locking,right?Thanks! (Sorry for english) Look at this link : http://www.youtube.com/watch?v=q-rQTHMVAuw and this : http://www.youtube.com/watch?v=y6_kOlUXYoI
Lead Driver
Joined: Jul 2007
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From: Rhode Island
Most cars have what is called an "Open-Differential". That means if one wheel looses traction, it is going to get most of the power, while the wheel that does has grip will get almost no power at all. But, you can order almost any truck, even some cars with a "Limited-Slip-Differential", basically if one wheel looses traction, it automatically sends power to the wheel that does have traction so you don't get stuck. Limited slip only works so well however. The videos you show there show a locking differential which can lock the wheels 1:1. I do not know of any trucks with an automatic locking differential as standard equipment, but you can get 09 F-150s and Dodge Power Wagons with electronically lockable differentials.
EDIT: That locking differential is an additional cost option on some Chevrolet and GMC Trucks.
EDIT: That locking differential is an additional cost option on some Chevrolet and GMC Trucks.
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YouTube - G 80 Cutaway So,only Chevy have this system?OK,if I want this G80 on my truck is this possible,and how much it will be cost for me?
Lead Driver
Joined: Jul 2007
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From: Rhode Island
It is not possible as far as I know. The axles are not the same, so the differential cannot be changed over. BUT, you can purchase a manual electric or air locker. You have to flip a switch to engage the locker when you loose traction, and have to remember to unlock when going around a corner
Postmaster
Joined: Oct 2008
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From: Richmond BC
there are lots of choices for aftermarket "full" lockers for ur truck..
i'd suggest a air or electric if its going in the back..a mechanical locker in the rear can be harsh to drive on the road..
but if ur serious about needing a locker for offroading then put it in the front..u get the best of both worlds... u only use the locker when ur in 4WD, and secondly having both wheels pulling will do more for u then having both rear wheels pushing...
hope that helps...
i'd suggest a air or electric if its going in the back..a mechanical locker in the rear can be harsh to drive on the road..
but if ur serious about needing a locker for offroading then put it in the front..u get the best of both worlds... u only use the locker when ur in 4WD, and secondly having both wheels pulling will do more for u then having both rear wheels pushing...
hope that helps...
Fleet Mechanic
Joined: Jan 2007
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For reference, the G80's major flaw was that it needed a good bit of tire spin to get it to lock. That is, it didn't lock till one wheel was spinning at a fairly high speed. Thus, you had about a 30% chance of exploding the differential when the locks "threw". Failure was UGLY, usually taking out the diff, carrier, AND ring/pinion.
It was/is an open differential until there's enough speed in the system to use centrifugal force to move pawls to lock down the spider gears. Enough speed to "throw" the pawls usually meant that one wheel was spinning at 30 MPH or so, and the other wheel was stationary. That meant that the spinning wheel suddenly got stopped when the pawls engaged, and that much energy has to go SOMEWHERE. There are a number of stories over on fullsizechevy.com, with pictures, of G80 failures. Usually resulting in two double-handfuls of metal shavings/chunks, and a very large tow bill.
After failures like this, most folks opted for limited-slip differentials, or lockers with much better actuation methodologies. There's a reason why GM didn't sell a whole lot of them.
-blaine
It was/is an open differential until there's enough speed in the system to use centrifugal force to move pawls to lock down the spider gears. Enough speed to "throw" the pawls usually meant that one wheel was spinning at 30 MPH or so, and the other wheel was stationary. That meant that the spinning wheel suddenly got stopped when the pawls engaged, and that much energy has to go SOMEWHERE. There are a number of stories over on fullsizechevy.com, with pictures, of G80 failures. Usually resulting in two double-handfuls of metal shavings/chunks, and a very large tow bill.
After failures like this, most folks opted for limited-slip differentials, or lockers with much better actuation methodologies. There's a reason why GM didn't sell a whole lot of them.
-blaine
Postmaster
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From: Richmond BC
LOL wow what a stupid design that is..
typical GM thinking..
"HEY, lets make the locker feature engage at 30mph wheel speed".. hahaahaha...
typical GM thinking..
"HEY, lets make the locker feature engage at 30mph wheel speed".. hahaahaha...
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Sit. Stay.
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From: Washington State
Didn't sell a lot of them??? Every Chevy/GMC that has a Z71 label on it has a G80 locker.
It doesn't require 30mph difference in wheel speed either. I can get mine on my Avalanche to lock at crawl speeds. It is far superior to the LS Trac-Lok offered by Ford in their half tons. So much so that Ford now offers a locking diff.
I won't argue that the design has its limitation, though. Big wheels, high torque are a recipe for failure. And there most certainly ARE better on the aftermarket but up until the 09 F-150 there wasn't anything better than the G80 for normal use.
It doesn't require 30mph difference in wheel speed either. I can get mine on my Avalanche to lock at crawl speeds. It is far superior to the LS Trac-Lok offered by Ford in their half tons. So much so that Ford now offers a locking diff.
I won't argue that the design has its limitation, though. Big wheels, high torque are a recipe for failure. And there most certainly ARE better on the aftermarket but up until the 09 F-150 there wasn't anything better than the G80 for normal use.
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From: Rhode Island
Because they are unreliable.
Fleet Mechanic
Joined: Jan 2007
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Z71 = FX4 = skidplates and shocks. No enhanced traction device. At least on any truck *I* ever knew. You may have seen some trucks that got the Z71 package AND a G80, but the two weren't ever offered together as a single package. Incidentally, like Z71, G80 is an option code, not a part number; G80 is the option code for a locking differential, like Z71 is the option code for skidplates and enhanced shocks.
It doesn't require 30mph difference in wheel speed either. I can get mine on my Avalanche to lock at crawl speeds. It is far superior to the LS Trac-Lok offered by Ford in their half tons. So much so that Ford now offers a locking diff.
I won't argue that the design has its limitation, though. Big wheels, high torque are a recipe for failure. And there most certainly ARE better on the aftermarket but up until the 09 F-150 there wasn't anything better than the G80 for normal use.
-blaine
Lead Driver
Joined: Jul 2007
Posts: 7,868
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From: Rhode Island
Go take a look over at the chevy and GMC forums. Lots and lots of G80s that completely fail leaving you with an open differentials, or others that explode and destroy the differential completely. Many people also complain about rough engagement, and not so nice noises going around corners.