Offroad Trailblazers and Envoys

SS Rear Differential Swap

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

by Aries » Mon Oct 10, 2016 1:10 pm

I strengthening my search for a SS rear differential so let my know if anyone comes across one. I'm willing to travel east of the Miss-sip with in reason. I'm really not into buying sight unseen but sometimes that's not an option. Right now I'm in Bridgeport WV on a work contract, I travel home to lower Delaware about once a month, so taking a detour would not be much of an issue.

LarryK's post got me thinking. I've been wanting to pull the 8.6 out and do a complete rebuild but I've also been thinking of an SS swap. If I'm going to spend the time and money :scratch: I may-as-well go with SS
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by ErikSS » Mon Oct 10, 2016 10:32 pm

Just to clarify, you're looking to buy a TBSS 9.5" 14 bolt rear axle, right? Not just the differential. Are you aware of the drive shaft and U joint changes that are required?
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by larryk » Tue Oct 11, 2016 9:22 am

No driveshaft change is needed.....but you MUST convert the U-joint to a "conversion" one. There is a NAPA number floating around the forums if you search for it.... Otherwise, its a complete plug and play. Except for geting the PCM reprogrammed for the different gear ratio, on a 2004 4.2 is a NIGHTMARE
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by Aries » Tue Oct 11, 2016 10:23 am

ErikSS wrote:Just to clarify, you're looking to buy a TBSS 9.5" 14 bolt rear axle, right?

Right
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by TBYODA » Tue Oct 11, 2016 9:24 pm

larryk wrote:No driveshaft change is needed.....but you MUST convert the U-joint to a "conversion" one. There is a NAPA number floating around the forums if you search for it.... Otherwise, its a complete plug and play. Except for geting the PCM reprogrammed for the different gear ratio, on a 2004 4.2 is a NIGHTMARE


Beside the convert U-joint most have found you have to shorten the drive shaft between 1-1.5" on a SWB.
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