Bad News, tranny or rearend went down.

GMCDriver1 · July 10, 2013

I had the G80 blow up in my old 99 Silverado at 70,000 miles. $1600 later a new G80 and transfer case as well since the fluid leaked out of it somehow over time and it was just a matter of time before it exploded as well. The earlier generation G80s in the GMT-800 half tons 1999/2000/2001 I believe) were known to blow up more frequently and rumor has it that GM/Eaton did something about it but if you do a lot of burnouts and drive the thing frequently on snowy/icy roads, it's just a time bomb waiting to go off from what I've heard. But there have been others on here with 200,000+ miles with no issues, so go figure? I am glad I have the G80 in my 3/4 ton Duramax, there is so much torque that the front and rear tires loose traction easily in 4wd (Good tires too) in the snow with little throttle applied. Once the G-80 kicks in, it really helps out in the back.

kstruckcountry · July 11, 2013

I'd rather have one large failure than an LSD that performs half as well as a G80. If my G80 goes, I'm thinking about seeing if an e locker will work in my diff.

Prokopchuk_9 · July 11, 2013

I blew the g80 in my 02 more than once, then went with a true trac locker. Never looked back.

Badass69 · July 11, 2013

Detroit locker. Done. I daily one so please don't try and tell me how terrible they are in snow and ice, rain and whatever. You are full of it.... period.

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Prokopchuk_9 · July 11, 2013

Detroit locker. Done. I daily one so please don't try and tell me how terrible they are in snow and ice, rain and whatever. You are full of it.... period.

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A little harder on rear tires tho eh ;-p

Badass69 · July 11, 2013

A little harder on rear tires tho eh ;-p

Naw. They actually wear evenly now. Turns fine around corners too.

Prokopchuk_9 · July 11, 2013

A little harder on rear tires tho eh ;-p

Naw. They actually wear evenly now. Turns fine around corners too.

I meant it's fun cornering, can hammer it harder. After I got a locker I wore thru rears like crazy haha

Badass69 · July 11, 2013

My rears always wear out quick on the 05 anyway and always have. Lots of weight and I stomp on it a lot. The only way it can break the tires loose is on ice or in the rain. If I didn't have 1500 lbs in the bed it might turn the tires over....... maybe. Even hard acceleration kils the tires, lol. The good old original Detroit Locker ( so not that Tru trac torque bias thing I despise, lol) work like a dream. The only thing notable with the Detroit is the slack in the carrier with relation to the axle shafts. You can have up to 30 degrees of carrier rotation before the axles start to turn...... So yes, it will clunk now and again. Other than that, you will never know its there.

Prokopchuk_9 · July 11, 2013

I loved the tru trac man, worked awesome!!

I need to get a grizzly locker for mike soon, it's been makin a little more metal than I like last couple oil changes LOL

Badass69 · July 12, 2013

Tru Tracs have a known design flaw in them and slowly eat themselves over time. Not a big fan from previous experiences with Quaife ( exact same design unit) but after tru tracs started self destructing..... oh well, lol. I like my rear diff locked for all intents.... not interested in limited slips. That and I never understood having a limited slip designed for cornering in road racing in the back of pickup truck. I slowly convince people lol...... Guy in Calgary almost drank the forum kool-aid on performancetrucks.net about Tru Tracs...... and we talked and he bought a real Detroit Locker...... drove it all winter in a 2wd 2011 1/2 ton and loved it. The internet seems to breed fear into people about things from sources that have never owned one.

But if you liked it that's good.

Prokopchuk_9 · July 12, 2013

Tru Tracs have a known design flaw in them and slowly eat themselves over time. Not a big fan from previous experiences with Quaife ( exact same design unit) but after tru tracs started self destructing..... oh well, lol. I like my rear diff locked for all intents.... not interested in limited slips. That and I never understood having a limited slip designed for cornering in road racing in the back of pickup truck. I slowly convince people lol...... Guy in Calgary almost drank the forum kool-aid on performancetrucks.net about Tru Tracs...... and we talked and he bought a real Detroit Locker...... drove it all winter in a 2wd 2011 1/2 ton and loved it. The internet seems to breed fear into people about things from sources that have never owned one.

But if you liked it that's good.

Mine was good for 100k Kms, never got noisy always locked up real nice.i beat the living snot out of it too. Don't know how long it lasted not do I care that truck is looooong gone. :-)

STINSAN3 · July 12, 2013

Well guys, I went by the local dealer this morning to see how bad it really was.
Wasn't too bad as I thought, just the rear-end is shot also with the axles! So the whole rearend is out of service.
Transmission & the transfer case is fine. Its just the rear-end.

UPDATE:
So anyways, they suggest for me to get a 14 bolt rear-end off of a 2500 series truck & put it back on there.
They got one they can put back there but, it is still 3.73 gears, just a bigger rear-end. Should I go with that?
OR
Should I just keep my housing unit & get 4.56's along with new axles?
or get the 14 bolt & still get the 4.56's installed in it?
Bad thing wouldn't the HD rearend be 8 lug instead of 6?

I was gonna get new gears next Summer, but my gears didn't make it.
The place where I got my lift installed & everything is little over one hour away. I should get them to do it since they specialize in that kind of work. My plan is to get 4.56's Yukon gears in it.

Badass69 · July 12, 2013

Don't swap the 8 lug diff in. If you want a 14 bolt get one from an 07 up Gmt900 half ton with either a 6 liter or 6.2. Much simpler swap that way. That would be the safest route. Your trans will thank you if you regear to 4.56 no matter what diff you use.

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kstruckcountry · July 12, 2013

Don't swap the 8 lug diff in. If you want a 14 bolt get one from an 07 up Gmt900 half ton with either a 6 liter or 6.2. Much simpler swap that way. That would be the safest route. Your trans will thank you if you regear to 4.56 no matter what diff you use.Sent from my SGH-I747M using Tapatalk 2

This. I for one like my front and rear bolt patterns matching.

STINSAN3 · July 12, 2013

Don't swap the 8 lug diff in. If you want a 14 bolt get one from an 07 up Gmt900 half ton with either a 6 liter or 6.2. Much simpler swap that way. That would be the safest route. Your trans will thank you if you regear to 4.56 no matter what diff you use. Sent from my SGH-I747M using Tapatalk 2

Just be too much if I got the 14 bolt rear-end & 4.56's too.

It would be alright if I just got the 4.56's instead?