Positraction & 4x4 - Chevy Colorado & GMC Canyon
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post #1 of 25 (permalink) Old 12-18-2015, 08:08 PM Thread Starter
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Positraction & 4x4

Is a positraction rear differential automatically included with 4x4 option, or is it an additional option?

Is the front drive housing fittable with a positracton unit?


Had a 1953 Marine Corps Jeep that had dual positraction, front & rear. Would climb a greased telehone pole on an iceberg with slick tires.
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post #2 of 25 (permalink) Old 12-18-2015, 08:18 PM
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What year truck do u have?

2011 Colorado CC Z71 2LT 4X4 3.7L with a few mods
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post #3 of 25 (permalink) Old 12-18-2015, 08:23 PM
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It is not automatic on a 4x4. My Z85 (base model) 4x4 has an open differential. GM's option is called G80 locker. Many have it. Normally on Z71 but I don't think Z71 does include it automatically (but is more likely to have it). I can't remember the RPO code, but somebody should report here soon.



RPO codes are the items installed as options on your vehicle. The sticker is silver and stuck to the inside of the govebox door. It's 3 alpha-numeric codes on the sticker.
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post #4 of 25 (permalink) Old 12-18-2015, 08:24 PM
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Also let's get something clear. Position traction is a limited slip differential. These trucks came with an automatic locking rear differential standard on z71s and we're optional on other models.

Front differential is open (no locker, no limited slip). You can get a locker for the front but it wouldn't last long since the housing made of aluminum

2011 Colorado CC Z71 2LT 4X4 3.7L with a few mods
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post #5 of 25 (permalink) Old 12-18-2015, 08:25 PM
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G80 is the RPO code

2011 Colorado CC Z71 2LT 4X4 3.7L with a few mods
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post #6 of 25 (permalink) Old 12-18-2015, 08:28 PM
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Duh.....

I was thinking code for gears (not type of assembly). Musta been a long day. wow
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post #7 of 25 (permalink) Old 12-20-2015, 09:21 PM
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Aren't they standard on the Canyon's? Not sure about Colorado.
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post #8 of 25 (permalink) Old 12-20-2015, 09:38 PM
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Don't know about 2nd gens. I was speaking about 1 gen.

2011 Colorado CC Z71 2LT 4X4 3.7L with a few mods
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post #9 of 25 (permalink) Old 12-21-2015, 10:17 AM
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You can't get a limited slip in these trucks. It's either the g80 locking rear or its open. The front is open on all of the trucks. I wouldn't put anything in the front. Unless you're doing serious off road, you don't need it. Like someone above said it will tear that aluminum housing to pieces. That g80 will serve you fine. Code for it is in the glove box under g80
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post #10 of 25 (permalink) Old 12-21-2015, 10:17 AM
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The g80 is also in the 2wds with the z package
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post #11 of 25 (permalink) Old 12-22-2015, 12:20 AM
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Well, after re-reading, I don't think OP has either truck yet, I think just asking. I thought though that it's standard on Canyon. Ahhhh, but after research, here is the exact specs from GM's website:


Rear: solid axle with semi-elliptic two-stage multi-leaf springs; twin-tube shocks; G80 automatic-locking axle std. on All Terrain, avail. on SLE and SLT
URL: http://media.gmc.com/media/us/en/gmc...fications.html


Now after reading the specs, this leads me to believe that you can actually buy a 4x4 without the G80. Hmmmm.... Not that it matters since it's a no-brainer on either the 2x or 4x.

Last edited by hack14u; 12-22-2015 at 12:27 AM. Reason: added URL
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post #12 of 25 (permalink) Old 12-22-2015, 01:32 AM
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My 2008 GMC Canyon 4x4 has an open rear diff.
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post #13 of 25 (permalink) Old 01-20-2016, 08:42 PM
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generally posi is an add-on for 4 WD trucks + if you want or need it along with 4 WD will give you traction beyond belief!!
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post #14 of 25 (permalink) Old 02-23-2016, 05:24 PM
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2008 4x4 and it's posi. It left two pretty black marks on the asphalt
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post #15 of 25 (permalink) Old 02-23-2016, 05:42 PM
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G80 Differential, automatic locking rear
1 - Available with (LCV) 2.5L I4 engine. Requires (Z82) Trailering Package when (LFX) 3.6L SIDI DOHC V6 engine or (LWN) 2.8L Duramax Turbo-Diesel engine are ordered. Not available with (N8D) 6-speed manual transmission.
2 - Available with (LCV) 2.5L I4 engine. Requires (Z82) Trailering Package when (LFX) 3.6L SIDI DOHC V6 engine or (LWN) 2.8L Duramax Turbo-Diesel engine are ordered.

Standard on these 3.6L models; 4LE, 2LT, 4LT


Order Guide


Quote:
¨ Optional Equipment (G80 Order Code) on all GM two-wheel and four-wheel drive light trucks and sport utilities.

Benefits

¨ Improved traction differentiates the vehicle relative to other rear wheel and four-wheel drive vehicles on the market.

¨ Maintenance free; requires no lube additives.

¨ Enhanced towing and off-road performance.

¨ Patented carbon friction disc technology enhances performance and durability while reducing warranty claims.



Principles of Operation

¨ Wheel speed difference (left to right) in excess of 100 RPM will cause a flyweight mechanism to open and catch a latching bracket.

¨ The stopped flyweight will trigger a self-energizing clutch system, which results in the cam plate ramping against a side gear.

¨ Ramping increases until both axles turn at the same speed (full lock), which prevents further wheel slip.

¨ At speeds above 20MPH, the latching bracket swings away from the governor and prevents lockup from occurring.



Technical Specifications

¨ Automatic locking takes place within a fraction of a second, so smoothly that it is unnoticed by the average driver.

¨ Unlocking occurs automatically, once the need for improved traction is gone, and is unnoticeable to the average driver.

¨ Compatible with anti-lock brake systems.

Mike

2015 Sierra Denali 6.2L/420HP
Protected by AMSOIL Synthetic Lubricants

Last edited by Z15_34396; 02-23-2016 at 06:01 PM.
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post #16 of 25 (permalink) Old 02-23-2016, 05:53 PM
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Fwiw

Positraction is a Chevrolet Marketing name from the 60's / 70's muscle car era.



Limited Slip Differentials are best suited to on-road applications where some wheel slip is desired to gain traction for performance.

Other GM divisions marketing names for the LSD

Buick: Positive Traction. Gran Sport models used the term "Limited-slip (differential)"
Cadillac: Controlled
Chevrolet: Positraction
Oldsmobile: Anti-Spin
Pontiac: Safe-T-Track

Mike

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Protected by AMSOIL Synthetic Lubricants

Last edited by Z15_34396; 02-23-2016 at 06:00 PM.
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post #17 of 25 (permalink) Old 03-28-2016, 10:24 AM
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Limited slip rear differentials are best not only for muscle cars, but anywhere traction, or the power to overcome traction, can create wheel slip. These are mechanical systems that lock up when the difference in left and right drive wheels speeds exceeds a set limit, There are very handy in off road conditions as well. The system disengages over a set speed. Some off road enthusiasts prefer greater control over the locking action of the diff, thus the electronically switchable locker.

For casual off road fun and snowy/icy conditions, the automatic locking diff provides a nice boost in performance and kicks in when it's needed. No need to actively engage it.

One word of caution. Going around a corner with a locking diff in snowy/icy conditions can cause not just one, but both rear wheels to spin loose. This can cause the rear end to fishtail out. For some it's a surprise. To others, it's another way to steer the vehicle from behind.
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post #18 of 25 (permalink) Old 05-13-2016, 09:36 AM
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Limited slip differentials are always engaged. They split torque between the wheels depending on traction, they are referred to as limited slip because they will allow differential action when 1 wheel tries to turn faster than the differential. Locking differentials lock up either by mechanical or electrical action. GM uses an auto locking diff that engages a pawl at low speeds if wheel slip is detected. They're trade name is Gov-Lok but used to be referred to as grenade lok because of the tendency of the pawl pin breaking and sending the pawl into the spider or ring gears, making a mess.

Last edited by 08Canyon; 05-13-2016 at 10:38 AM. Reason: removed cursing
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post #19 of 25 (permalink) Old 05-20-2016, 09:49 AM
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G80 does't seem to be available on manual shift .
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post #20 of 25 (permalink) Old 05-20-2016, 10:10 AM
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Are you talking about 2015+ models? Or 2004-2012 models?

2011 Colorado CC Z71 2LT 4X4 3.7L with a few mods
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