98chevy2500SS
Specializes in Accessories 101
I think he's saying on the 9.5" axle:
Only G80 option was offered
LSD was never offered
At least that's what I understood.
![Doh2 :doh2: :doh2:](/styles/default/xenforo/smilies/doh2.gif)
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I think he's saying on the 9.5" axle:
Only G80 option was offered
LSD was never offered
At least that's what I understood.
Yeah, I was also trying to remember. Those old Eaton videos that I've posted before are square body generation trucks with the G80, and I'm certain that's true of GMT 400s also. At least on the later GMT 400, the only differential traction aid was the G80, nothing else.Re-read his post closer and now I see what he's asking. I'm not sure if I have ever seen a 9.5" axle without a G80, hopefully there are others that have come across one, maybe @someotherguy or @Z71Hobbs have seen one?
That's what I meant, yes. My truck has a 9.5 and all I want to do is to replace the diff, not the whole axle, with something from the JY with an LSD (and not the G80).I think he's saying on the 9.5" axle:
Only G80 option was offered
LSD was never offered
At least that's what I understood.
You won't find a LSD at the junkyard, as they were not offered from the factory. Unless you somehow find one that someone installed aftermarket on. Good luck on that.That's what I meant, yes. My truck has a 9.5 and all I want to do is to replace the diff, not the whole axle, with something from the JY with an LSD (and not the G80).
Um, it looks like they actually have rebuild kit for the 9.5" G80: https://www.betperformance.com/prod...4-bolt-late-differential-complete-clutch-kit/
You said you didn't know if yours is not working? Was it working before? You have the correct fluid? IIRC, no friction modifiers on the G80? You need to remove your differential cover and see what the internals look like. Are you on stock tires? What's the use for the truck? Light off-road?![]()
GM G80 Gov-Lock 8.5" 8.6" 9.5" 10 & 14 Bolt Differential Latching Governor Kit - BET Performance & Engineering
Late model GM latching governor kitwww.betperformance.com
I believe the latching axle (on the left) is the part that breaks, normally. Strips the teeth off the geared end of the axle when one wheel is spinning and wheel speed drops low enough to lock the diff.
The truck is new to me, and it wasn't working when I got it. The PO got it fairly recently before I bought it (lots of issues that I wasn't afraid to tackle) and one of the things he said (and that I verified) is that there are new shafts in the axle for some reason. One was bent? Anyway, the guy put new shafts in and probably either blew up or removed the G80 and replaced it with an open diff. I don't know if it's working or not because it might be working... in someone else's truck. I haven't pulled the cover yet.You said you didn't know if yours is not working? Was it working before? You have the correct fluid? IIRC, no friction modifiers on the G80? You need to remove your differential cover and see what the internals look like. Are you on stock tires? What's the use for the truck? Light off-road?
I don't know of anyone modifying their G80, unless you are asking about fixing it up. If it's only the governor that broke and everything else is okay, that seems like an easy fix.
Why is the Tru-trac not a good idea for off-road use? I hear they are great all-around. I couldn't remember if that's what @kennythewelder had installed in his truck. I believe the only downside is you have to "fool" it by tapping on the brakes if one of the rear wheels come off the ground and get it to engage? I wouldn't really think that's a downside myself, just learn to operate it. Big advantage is no air lines, compressors, electrical and other stuff to worry about.
I don't know much of else out there for the GM 9.5" maybe ARB air locker? Lot's of offerings for the 10.5" though:
![]()
14 Bolt Locker Options
A 14 bolt rear axle is one of the simplest and cheapest strength upgrades you can do when you need a strong rear end. Because they're cheap and strong, some of the options are a little different than other axles, and usually those options are also more budget-friendly. This is the best source...www.roundforge.com