Just Picked up an 87 Iroc and I saw two RPO codes on there that stood out.

G80 and G92 I thought they were different options for the rear diff. I dint think it was possible to have them both, Can someone explaint hat to me please?

 

G80 = Posi rear end
G92 = performance ratio for the rear end

 

does that mean Ive got the Borg Warner rear?

 

Yup.

 

sweet deal, lol. I heard rumors on either this siteor another that theyre stronger than the Dana 44. How true is that. Im also assuming I have the 3:45 gear ratio then too?

 

The 9 bolt rear is supposed to be strong, but it's still not very hard to break one. It's not unusual to rip teeth off the gears. To make matters worse, they're harder to find parts for then the 10 bolts.

 

The 9 bolt has a 7 3/4" ring gear. The Dana 44 is 8 1/2". Dana is stronger, IMHO

 

Lovely JUuuust Lovely. Ill just weld the tubes around the axles to the pumkin like I did with my other rear and get a girdle type cover. that should strengthen it a bit you think?

 

If you intend to run sticky tires, and much more then stock power, I'd recommend pulling the rear and either swapping to a 10 bolt which would be easier and cheaper to upgrade/replace when it grenades, or upgrade to a different, more common, performance oriented rear axle.

 

Or just get yourself a Ford (ick) 9" and install that...

John

 

theres no way im goin to put a ford rear underneath an IROC tht is an utter disgrace lmao

 

but if you want something that will take abuse, then that is what you go with...

 

true but IM done with drag cars and abusing these cars.... atleast for now. I just want a clean nice daily driver that I can have my fun with... I got in my Trans am today and I barely drive it , but just because of how powereful it is... I cant help but put my foot all the way in it. When I walked iside I said to my gf ... "that is why i dont need a car that powerful on the street." she said "Why?" and I said "Cause I cant keep my foot out of it"