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kickstand

Turbo Monkey
Sep 18, 2009
3,441
392
Fenton, MI
they were factory options.



you can turn the limited slip off on a Silverado???????

Ford has not been bailed out either. and the Fseries trucks have been the best selling VEHICLE in the U.S. for over 19 years.


the Dakota was a fantastic truck, until recently....they are now hideous and might even move to a unibody in 2012..ugh. they were always the largest in the mid size class.

[/IMG]
until you combine the GMC Sierra and Chevrolet Silverado Sales considering it's the exact same truck.

engaged sorry, no you cant turn it off, its supposed to come on automatically but mine never did.
It sounds like your truck was never ragged on....

GM's gov lock has been around for quite some time and works pretty well for it's intended use. It's a limited slip, not a locker, once you break traction with enough force on one tire over the other it's not going to lock up, and if it tries hard enough and is succesful, it most likely is not going to unlock too well after that.

With that said, my brother did have a truck that also had problems with the rear differential as you explained. He's also used and abused the **** out of that truck plowing snow, pulling landscaping trailers, and driving it like it's a hot rod. He's crossed 100,000 miles recently with no issues otherwise...and the rear diff still has not blown up, despite the quirky limited slip in the back.
 

demo 9

Turbo Monkey
Jan 31, 2007
5,910
46
north jersey
Ok, better understanding, mine was not terribly beat on, and the only pulling i did with it was pulling Quad trailers. See (and i may be wrong) when you floor it on a snow covered road, shouldnt both tires spin and "burnout" for me only 1 would. about 25% of the time both would and when they did. it would hop around corners for a while until it finally turned off. I noticed it the most when i would pull the trailer out of my driveway (in snow) it would spin 1 tire the whole way. *however* the day i sold it i finished off the tires and it locked and did a worthy burnout.
 

CrabJoe StretchPants

Reincarnated Crab Walking Head Spinning Bruce Dick
Nov 30, 2003
14,163
2,484
Groton, MA
Ok, better understanding, mine was not terribly beat on, and the only pulling i did with it was pulling Quad trailers. See (and i may be wrong) when you floor it on a snow covered road, shouldnt both tires spin and "burnout" for me only 1 would. about 25% of the time both would and when they did. it would hop around corners for a while until it finally turned off. I noticed it the most when i would pull the trailer out of my driveway (in snow) it would spin 1 tire the whole way. *however* the day i sold it i finished off the tires and it locked and did a worthy burnout.
Reason #2835 why selectable lockers kick ass.
 

dan-o

Turbo Monkey
Jun 30, 2004
6,499
2,805
The optional locking differential in GM trucks is the Eaton G80. It automatically locks below 25mph when needed.
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,030
5,918
borcester rhymes
Ok, better understanding, mine was not terribly beat on, and the only pulling i did with it was pulling Quad trailers. See (and i may be wrong) when you floor it on a snow covered road, shouldnt both tires spin and "burnout" for me only 1 would. about 25% of the time both would and when they did. it would hop around corners for a while until it finally turned off. I noticed it the most when i would pull the trailer out of my driveway (in snow) it would spin 1 tire the whole way. *however* the day i sold it i finished off the tires and it locked and did a worthy burnout.
if your truck still moved down the driveway, then the LSD did its job. If you stand on it, it'll spin both tires, but in the snow it'll distribute torque more appropriately.

I had a conquest that I could lock up with a good stomp. Got me in trouble once but was tons-o-fun on wet pavement with bald tires. That had an LSD.
 

kickstand

Turbo Monkey
Sep 18, 2009
3,441
392
Fenton, MI
The optional locking differential in GM trucks is the Eaton G80. It automatically locks below 25mph when needed.
Some information from Pirate4x4 regarding a gentleman who asked how to modify the locker.

There are 2 different kinds of weights in there.. the pawls that splay out when there's a >10mph speed difference between left & right, and the complementary pawl that swings out of the way when overall speed is >20mph as a safety mechanism.

The safety one isn't worth modifying, because you shouldn't want your locker to engage >20mph unless you're into drifting (and have the horsepower, skinny tires to pull it off)

The little ones that swing out to cause a lock are difficult to modify because the clearances around them are tight... you can't slap a bead of weld onto the side because they need room to rotate, you can't slap a bead of weld on the cylindrical edge of them because it needs to clear the safety pawl. Not to mention a weld near the engaging edge could well make it brittle and cause it to chip off, which won't do you any favors.

You can try sourcing a weaker spring to retain the engagement pawls.... that will involve finding out what the stats of the existing spring are - or possibly just modifying the existing spring if you want to stab in the dark at it.

Or just acknowledge that you have the worst kind of locker there is and learn to drive with it or replace it. Sure, gov-locks blow up when you hammer on it - all sorts of parts blow up when you pound on the go-pedal like a retard - it's a poor surrogate for finesse. Gov-locks require a little wheelspin to engage, and when they do it also jerks the stationary tire... that sucks, but when you know what the machine does, you can tailor your behavior to the machine's because the machine sure doesn't care to tailor itself to you.

G80/Gov Lock is sort of a universal term for the GM locker, the G80 is basically a newer version from Eaton.

Some more information on the G80/Gov Lock

I am pretty sure that even teh new trucks have clutches in the G80's, the dif is called an Eaton Gov-lock. The unit sense when both axles have a difference in turning rate of 100-200 rpm, an arm then latches and forces the clutches together.
Here is readup of how the Govlock works, it is used in all 1/2 ton trucks since the 80's.
http://www.eatonposi.com/prod2.htm

The G80 is a locking rear dif which locks the 2 rear axles together as long as wheelspeed is under 20 mph. If the clutch pack was engeged over 20 mph, a 2wd truck would be dangerous in the Winter time, for a "majority" of drivers, simply fun for others.
The true Posi or limited slip has a clutch pack that is CONSTANTLY holding the 2 axles together, only when the force of the axles turning at different speeds like when cornering will it allow for slippagge, hence the limited slip. This type was found on the gen 3 f-bodies and many other cars, this type would be scary in the Winter in a 2wd truck, just like a full locker like the Detroit locker would be. The amount of force it takes to allow for axle speed differentiation is adjusted by raising or lowering the preload on the clutch pack in the dif.
If you look at a Gov lock, it's not going to react like a detroit locker when you get one tire spinning excessively faster than the other, where as a detroit or true locker is going to lock up because it will allow one tire to freewheel faster than another, but will not let one tire recieve power faster than another.

Here is a good video showing how the G80 works. Again keep in mind, it's a limited slip, not a locker.


If you understand rear ends and how they work it may also explain why the locker itself gets stuck when you hammer down spinning one tire hard enough to get it to engage passed it's "threshold" for lack of a better term and gets stuck in the locked position.

When used for it's intended purpose (90%) of the population (ie light throttle in slippery conditions) it works. When it's pushed beyond those limits it doesnt.

It's intended to also operate like an open differential to maintain better street characteristics and tire wear than a true locker does. Again, to appease 90% of truck owners. When abused or expected to act like a true locker, it's not going to work or break. If you want a locker, order a truck with an open dif and have a locker installed.
 
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demo 9

Turbo Monkey
Jan 31, 2007
5,910
46
north jersey
See what i didnt understand about my truck is that 75% of the time, only 1 would spin. My friends with the same truck (although different variations) never had my issues, and when you watch the tests of the "icy hill" on the internet, my truck would be successful and it would lock in. mine spun only 1 tire, almost all the time and would fail the test. I would have to use 4wd to get up the driveway in the snow. Is there something they do differently when they romp on it in the snow. My LSD acted like the open diff in my friends old S10
 

IH8Rice

I'm Mr. Negative! I Fail!
Aug 2, 2008
24,524
494
Im over here now
See what i didnt understand about my truck is that 75% of the time, only 1 would spin. My friends with the same truck (although different variations) never had my issues, and when you watch the tests of the "icy hill" on the internet, my truck would be successful and it would lock in. mine spun only 1 tire, almost all the time and would fail the test. I would have to use 4wd to get up the driveway in the snow. Is there something they do differently when they romp on it in the snow. My LSD acted like the open diff in my friends old S10
did they have the Z71 offroad package or anything like that? lockers can be purchased when the truck is new direct from the factory.
my Dodge rear end does the same thing on the snow
 

demo 9

Turbo Monkey
Jan 31, 2007
5,910
46
north jersey
did they have the Z71 offroad package or anything like that? lockers can be purchased when the truck is new direct from the factory.
my Dodge rear end does the same thing on the snow
All have Z71, ill have to check on lockers but i do not think so. As i said, im 90% sure it was broken. How much is a locker option anyways. (not that it matters tundra is open diff with traction control, but what do they run for.
 

Hulkamaniac

Monkey
Oct 10, 2001
501
0
Germantown, MD
SPLASH edition?
with the step side bed?!?!?

Saw a group of rednecks crusing around in that very same ranger (eggplant, SPLASH, step side) a few summers ago while taking a back road short cut to my parents house in West Virginia. Best part, and which didn't dawn on me until I saw the water splashing around in the bed as I pulled over to let them pass on the single lane, was that they had dropped a tarp in the bed and filled it with water (redneck pool?).
 

KillerSloth

Chimp
May 15, 2009
54
0
Gimme an old school chevy luv or even a nissan or mazda from the late 70's early 80's. pre 84 toyota mini truck with no rust, now those were cool mini's.
I have a Chevy LUV with damn near no rust (and it's just surface rust)! 1980 long bed with around 80k miles on it... great first truck, but something is wrong with the carb so it's not running that great right now (I have a Ford Ranger as my main vehicle)
 

Dog Welder

Turbo Monkey
Sep 7, 2001
1,123
0
Pasadena, CA
Before you get mislead about the fuel economy issue go to Fuelly.com. You'll find real world fuel economy numbers there from hundreds of sources. Its a website that allows you to track you mileage. Just because you drive a tacoma doesn't mean you'll automatically get great gas mileage compared to a larger truck. A four banger tacoma gets 20mpg roughly. That's only like 3mpg more than a Silverado 1500
 

johnnypop

Chimp
Aug 24, 2006
86
0
San Jose/Santa Barbara
I dunno about all this other jibber-jab i just read, but I'm going with a White, Crew-cab, Shortbed, 4x4, Diesel, Sierra in another year or two. I love the new body style and with a Thule 4 bike on the back I can go anywhere I want with all the gear I want. Yeah, yeah, yeah... the payment will be expensive, but this thing will also be hauling quads, dirtbikes, and possibly a toy hauler trailer once it's paid off.
 

FlyinPolack

Monkey
Jul 16, 2007
371
0
Get a Chevy
I've paid 2 chevy trucks off (a 1500, & a 2500hd) without ever ONCE using the warranty on either.
I've had 0 recals on my trucks in 10 years. can toyota say that? not even close...:thumb:

Been great trucks, & will drag a toyota truck across the parking lot when chained up bumper-bumper. hehe
 

kickstand

Turbo Monkey
Sep 18, 2009
3,441
392
Fenton, MI
Before you get mislead about the fuel economy issue go to Fuelly.com. You'll find real world fuel economy numbers there from hundreds of sources. Its a website that allows you to track you mileage. Just because you drive a tacoma doesn't mean you'll automatically get great gas mileage compared to a larger truck. A four banger tacoma gets 20mpg roughly. That's only like 3mpg more than a Silverado 1500

I averaged 18 mpg in both my 99 and my 07, over 20+ on long highway trips.
 

Kntr

Turbo Monkey
Jan 25, 2003
7,526
21
Montana
I dunno about all this other jibber-jab i just read, but I'm going with a White, Crew-cab, Shortbed, 4x4, Diesel, Sierra in another year or two. I love the new body style and with a Thule 4 bike on the back I can go anywhere I want with all the gear I want. Yeah, yeah, yeah... the payment will be expensive, but this thing will also be hauling quads, dirtbikes, and possibly a toy hauler trailer once it's paid off.
The only problem with a bike rack on the back is the dust when you go on gravel roads. I put my bikes in the bed when we go onto the dirt. The dust will just coat all the bikes on the back. I still use the T2 on pavement though. Im going to figure out a way to mount the T2 inside the bed this winter.
 

chicodude

The Spooninator
Mar 28, 2004
1,054
2
Paradise
The only problem with a bike rack on the back is the dust when you go on gravel roads. I put my bikes in the bed when we go onto the dirt. The dust will just coat all the bikes on the back. I still use the T2 on pavement though. Im going to figure out a way to mount the T2 inside the bed this winter.
Really?


Worried about your MTB's getting dirty?


FAIL!
 

Kntr

Turbo Monkey
Jan 25, 2003
7,526
21
Montana
Really?


Worried about your MTB's getting dirty?


FAIL!
Are you serious? Have you ever driven up 10-15 miles of gravel road with your bikes on the back of a vehicle in the summer? The bikes get covered in dust. Ive seen it so bad that you cant even tell the color of the bikes. The brakes make a horrid noise when you start riding. Its not good for the bikes.

No, Im not worried about my bikes getting dirty... my bike gets dirty when I ride it. I ride year around in the snow and mud. If I can prevent frequent maintenance I will. You go right ahead and put your bike on the back. Me Ill put it inside the truck bed.
 

KavuRider

Turbo Monkey
Jan 30, 2006
2,565
4
CT
gawd, I want one of those...

To the people saying only 4 DH bikes in the back of a Tacoma...
What?!
You can get at least 7 in, 8 if you're creative...plus the riders...just for shuttling though :D

I currently have an '88 E150 Econoline conversion van...I'm not the right person to ask for vehicle advice ;)
A local guy has a 2002 E350 12 passenger with the V10 - he gets better mileage than I do, like 15mpg (I get 10 :dead:), I want HIS van with the interior of mine...
 

demo 9

Turbo Monkey
Jan 31, 2007
5,910
46
north jersey
I am going to guess that tundra is stock (has a window sticker) As for the 2nd video, how could the trundra (or any other truck) be rolled backwards. Stating this poorly, but doesnt the motor not let the car roll backwards? or if it does isnt that terrible, making the engine move backwards?
 

IH8Rice

I'm Mr. Negative! I Fail!
Aug 2, 2008
24,524
494
Im over here now
I am going to guess that tundra is stock (has a window sticker) As for the 2nd video, how could the trundra (or any other truck) be rolled backwards. Stating this poorly, but doesnt the motor not let the car roll backwards? or if it does isnt that terrible, making the engine move backwards?
 

kickstand

Turbo Monkey
Sep 18, 2009
3,441
392
Fenton, MI
I am going to guess that tundra is stock (has a window sticker) As for the 2nd video, how could the trundra (or any other truck) be rolled backwards. Stating this poorly, but doesnt the motor not let the car roll backwards? or if it does isnt that terrible, making the engine move backwards?
what?

As for any of those videos gimme a break
 

jimmydean

The Official Meat of Ridemonkey
Sep 10, 2001
40,931
13,129
Portland, OR
Car and truck "enthusiasts" have got to be some of the biggest blowhards on the planet.
Transportation is not a hobby.
Awesome.

Mitch Hedberg said:
If you boat a lot you are known as a boating enthusiast. I like to boat, but I just don't ever want to be referred to as a boating enthusiast. I hope they call me 'a guy that likes to boat'.
 

Sandwich

Pig my fish!
Staff member
May 23, 2002
21,030
5,918
borcester rhymes
Car and truck "enthusiasts" have got to be some of the biggest blowhards on the planet.
Transportation is not a hobby.
oh, that's good to know. I didn't know you couldn't have fun in a car, ever. Good thing you can only have fun on a bike, and not use it to get anywhere. You want a bunch of blowhards, go check out the DH forum.
 

Jeremy R

<b>x</b>
Nov 15, 2001
9,698
1,053
behind you with a snap pop
do you need better proof?

I generally ask more questions than I try to answer...and I know my limits on suspension goofiness....but i'm not innocent :thumb:
Ha, I hear ya.
My beef with the car yahoos come from the dudes who are driving like maniacs on the way into work in the morning wearing their shirt and tie, and stoked because they put a new cantaloupe launcher muffler on their import.