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Rear End locked Up!

mattro

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mattro Enthusiast

mattro

Posted
Posted

well got my truck towed today because it made a loud clacking noise as if something were gringing against the ground the rear end locked up on me i checked the fluid and it was fine so im not sure what would cause it to freeze up but when i got ito home off the tow truck flatbed i tried to move it closer to the curb and in first gear with my 5spd it wouldnt budge but just make a loud clicking noise. So it seems im going to need a new rear end or the insides at least. I believe i have the 4.10 g80 im going to go check my glovebox but i need some opionions on what to buy. The guy before me used this truck for construction and towed stuff around its a 6cyl 5spd i just want to get something that isnt going to break again its only got 90k on it a '99

 

anyways im gonna check the codes in the box and also count to bolts on the rear and post it

 

Its a 10 bolt GT4 G80

 

Looked up the rpo Linklink

I have

G80= Axle Posi-traction Limited slip

GT4= 3.73

 

I was reading that until 01 the limited slip sucked because if you got on it on a turn it could burn something up inside and ruin there rear shortly after. So im looking into Automatic Locking differential for the back but could really use some advice.

Can i put 4.10, 4.55, 4.77 in the rear end and have the stock in the front and still be able to use the 4wd without recking anything or do the gears need to be the same?

srlbotanical Enthusiast

srlbotanical

Posted
Posted
Its a 10 bolt GT4 G80

 

Looked up the rpo Linklink

I have

G80= Axle Posi-traction Limited slip

GT4= 3.73

 

I was reading that until 01 the limited slip sucked because if you got on it on a turn it could burn something up inside and ruin there rear shortly after.  So im looking into Automatic Locking differential for the back but could really use some advice. 

Can i put 4.10, 4.55, 4.77 in the rear end and have the stock in the front and still be able to use the 4wd without recking anything or do the gears need to be the same?

 

 

 

 

 

You need to have front and back gears match, so if you change the back you have to change the front.

 

Have you pulled the cover of your rear diff yet? I bet your G80 took a dump...

 

Your best bet is to put a good limited slip in there. I like the Detroit truetrac, but the Eaton is an awesome unit as well...

 

You really don't need a true locker IMO... A limited slip works fantastic in our trucks.

 

Good luck.

 

Steve

mattro Enthusiast

mattro

Posted
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Posted

That seems like a good product i checked it out and it has no cones or clutches or maintance. I guess on the stock unit the cone would burn up if a turn was takin with to much acceleration and I dont slow down much so theres no sense in getting the stock gears again. Its only a 6cyl so ill leave the gears stock ratio since im not going to be dropping too much money into it. Besides my stereo(3k) and 3" torsion key leaf lift that i have already got. Thanks for the advice ill be calling the mechanic monday morning try to get it driving again

mattro Enthusiast

mattro

Posted
  • Author
Posted

my mechanic suggested the detroit truetrac also to rebuild my current rear axle. He found a used chevy axle for $1500 lol he said after labor it would cost as much as rebuilding mine. He said it could cost $2000 to $2600 does that sound right just for the rear. He said $400-$500 labor and hes putting in my add a leaf and rear shocks also

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