95 14bff one legger fix?

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Chillin Dylan

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Yeah I ended up getting a G80 with my dually, but hunted down a 9.5" 14 bolt for my 1500 I'm the pull and pay that had 4.10s and a G80. The weights I spec'd were axle weight ratings, not vehicle weight ratings even though I typo'd and don't fully believe them myself. My rear axle weight rating in my dually is 7,500, but I believe the leaf pack holds it back as the chassis cab trucks had higher ratings with the same axle. I believe a single rear wheel truck would have been good for around 6,000# on the rear axle, tire limited in that instance IIRC.

My 95 auto 1500 that I used to have had a G80, and I can’t say I was super impressed with it. 237k on it when it got retired and it would only spin the second tire in a burnout one way. You had to shift it into 1st, lightly press the brake, stand in the gas, and then stand on the brake. Only after I stood on the brake to hold the truck still would it start spinning the second tire. And it only really worked on asphalt. In the dirt or mud it wouldn’t spin the second wheel no matter what you did. But taking off from red lights in the rain, even gently, it was happy to spin them both even when you least wanted it to [emoji849][emoji2369]


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df2x4

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My 95 auto 1500 that I used to have had a G80, and I can’t say I was super impressed with it.

This was one of the main reasons for my response earlier. The "G80" carriers that GM uses are a real crap shoot and range from decent functional clutch type posi units in 3rd gen Camaros and such, all the way to the crappy Gov-Lock units that these trucks got. (Which unlock automatically at wheel speeds of roughly 20+MPH and are unpredictable locking from a stop at best) Without knowing exactly what "G80" carrier they used in the 11.5 AAM axles I wouldn't spend any money on one, and I'm willing to bet it's garbage compared to most of the aftermarket options available for your 14 bolt.
 

Chillin Dylan

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Without knowing exactly what "G80" carrier they used in the 11.5 AAM axles I wouldn't spend any money on one, and I'm willing to bet it's garbage compared to most of the aftermarket options available for your 14 bolt.

The Duramax I mentioned locks and unlocks the rear end in a nice, predictable way. But i have no clue what diff code it has, whether it’s a G80 or something else.


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df2x4

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The Duramax I mentioned locks and unlocks the rear end in a nice, predictable way. But i have no clue what diff code it has, whether it’s a G80 or something else.


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If it spins them both it should be a G80. That's GM's universal RPO code for positraction/locking.
 

Chillin Dylan

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If it spins them both it should be a G80. That's GM's universal RPO code for positraction/locking.

Yeah it’s probably a G80. Definitely spins them both, I’ve had quite a bit of fun drifting that thing around in the rain and snow lol


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Steve A

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It's my understanding the G80 (Gov-Loc) only engages below approximately 35 MPH, also the carrier is substantially weaker because of the large "windows" cut out of the case for the Governor assembly.
 

Gibson

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Going to the AAM axle may involve more than re-locating perches and shock mounts, the drive shaft length might need to be changed also, IIRC.
For the majority of uses, a Trutrac is a better option than a Detroit.
 

Spookers

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I bought the Eaton truetrac for the corporate 14bolts (10.5) a year ago for about $800cad to my door from summit. Honestly by the time you buy the 11.5, buy new gears, swap and mix and match parts and then having a crappy g80 at the end of the day, the truetrac is the best option and cheaper in the long run.
 

evilunclegrimace

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Going to the AAM axle may involve more than re-locating perches and shock mounts, the drive shaft length might need to be changed also, IIRC.
For the majority of uses, a Trutrac is a better option than a Detroit.


The Truetrac is made by Detroit. But if you mean that the Torsen type diff is better than a locker then I agree that it is a better option especially for a street driven machine
 

Gibson

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But if you mean that the Torsen type diff is better than a locker then I agree that it is a better option especially for a street driven machine
Yes, I do mean that,,.
Also, we need to understand that a "Torsen" type diff never totally locks-up,, the maximum torque bias is controlled by the helix angle on the gear teeth.
The Trutrac is a "type" of Torsen,, in the first vid, we can see the operation of the Trutrac, in the second vid we can see the operation of the original patented "Torsen" as was manufactured by Gleasen.
Trutrac;
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Torsen;
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In the description of the Torsen, the narration is somewhat misleading,, the bias is still controlled by gear angles.
 
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