Offroad Trailblazers and Envoys

want to order gears

G80, GU6, GT4, GT5, WTF? This section is for gearing and driveline stuff.

by MK-voy » Tue Jul 24, 2012 1:35 pm

i have found 4.56 gear ratio for the front diff but not for my rear 8.0 diff i need to swap for the 8.6 to get them??
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by 06MidnightBlue » Tue Jul 24, 2012 4:23 pm

Not necessarily. I've been told that Yukon Gears can custom cut them for the 8.0. You just gotta have the bank to do it.
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by DirtyBacon04 » Tue Jul 24, 2012 4:40 pm

Cheaper to get an 8.6" from a junkyard w/o a g80. Put 4.56 and a LR in there. Thats my long term plan.
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by navigator » Tue Jul 24, 2012 9:52 pm

you could also just go with 4.10 front and rear.
It just depends on what your long term goals are.
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by 06MidnightBlue » Tue Jul 24, 2012 10:16 pm

I'm planning on 4.10's for my 8.0
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by fishsticks » Wed Jul 25, 2012 1:56 am

DirtyBacon04 wrote:Cheaper to get an 8.6" from a junkyard w/o a g80. Put 4.56 and a LR in there. Thats my long term plan.



This.
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by navigator » Wed Jul 25, 2012 8:12 am

I wonder if the 8.6 rear is as easy to score in Lebanon as here in the US?
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by fishsticks » Wed Jul 25, 2012 12:22 pm

navigator wrote:I wonder if the 8.6 rear is as easy to score in Lebanon as here in the US?



In a pinch he could source one from a half ton truck and have his perches and tabs welded onto it.
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by bartonmd » Wed Jul 25, 2012 1:40 pm

fishsticks wrote:
navigator wrote:I wonder if the 8.6 rear is as easy to score in Lebanon as here in the US?



In a pinch he could source one from a half ton truck and have his perches and tabs welded onto it.


That actually might work well. No need for spacers in the rear, because it's already about 4" wider...

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by navigator » Wed Jul 25, 2012 1:51 pm

hmmm
then you should just need 2 inch spacers in the front to be evenly spaced.
I expect the ones on the 1/2 tons are easier to source than from a TB.
Do they have the same break downs as far as ABS etc? I mean for like my 06 would I need an 05+ or are the break downs different? Is there any difference in driveshaft lengths?
I expect we would also have to weld on new shock mounts also but that shouldn't be a huge deal.
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by fishsticks » Wed Jul 25, 2012 2:12 pm

navigator wrote:hmmm
then you should just need 2 inch spacers in the front to be evenly spaced.


The front track on a stock TB is actually 1" wider than the rear. 1.5" would make it "even". 2" would keep the extra 1" width.

I only bring it up since 1.5" spacers/adapters are commonly available in our pattern.
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by navigator » Wed Jul 25, 2012 3:32 pm

Nice!
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