How do I determine rear axle ratio for my 2015 Tahoe LT?

[Fless]

^^^ THIS. G80 is also called Limited Slip in the RPO description. Very common rear diff in these rigs.

 

[Solace]

GU4 is the 3.08 gear and G80 is the posi-trac rear differential. I cannot find and GBA code. Are you sure that is the correct code?

GBA is the color code for black paint

 

[Paul Cronin]

GU4 is the 3.08 gear and G80 is the posi-trac rear differential. I cannot find and GBA code. Are you sure that is the correct code?

I received a copy of the vehicle build from Chevy this morning and the GBA code is for the color (black).

 

[Paul Cronin]

I come up with a Trailer Weight Rating of 6,600 pounds and a GCWR of 12,000 pounds.

So if I understand this correctly (sorry, I'm new to this towing stuff)..... the GCWR is the total weight of the Tahoe and the trailer combined that should not be exceeded?

 

[OR VietVet]

The GCWR is the vehicle, preferably with a full tank of fuel, the trailer with the load carried in it and any gear you load in the tow rig and the weight of people in it. That combined total weight is the GCWR. If you stop for a bag of Quarter Pounders, add that in too.

 

[Paul Cronin]

The GCWR is the vehicle, preferably with a full tank of fuel, the trailer with the load carried in it and any gear you load in the tow rig and the weight of people in it. That combined total weight is the GCWR. If you stop for a bag of Quarter Pounders, add that in too.

Thanks, Ill keep that in mind.

 

[OR VietVet]

Something else you need to keep in mind is that besides the engine working hard to pull all the weight, the trans works very hard too. When was last time the fluid and filter were changed? Is the trans cooler free and clear of clogging debris? Are the tires up to ***** with plenty of tread and correct air pressure? Engine cooling system clean and full with no coolant leaks? Engine oil in great shape? In other words did you get maintenance/repair records with this vehicle?

 

[swathdiver]

So if I understand this correctly (sorry, I'm new to this towing stuff)..... the GCWR is the total weight of the Tahoe and the trailer combined that should not be exceeded?

Yessir, exactly right. GCW is the actual combined weight of both vehicles as presently loaded. The "R" at the end of a weight rating signifies maximum limits.