The Problem
You want to go fast but your differential can’t keep up - resulting in broken spiders, gears and axles, etc.  Traction is also non-existent.  Three replacement differentials later its time to find a new solution.

The Solution
We replace your ‘grenade’ with a strong, time-tested 8.5” 10 bolt/12bolt hybrid rear end. The rear comes with 3.73 gears (other ratios by request), a new Eaton posi, new 12bolt 30 spline axles and all carefully assembled with Timken bearings. Your rear-end breakage problems are OVER!

Our ordinary awesome differential solutions coupled with Global West's handling and traction innovations add up to a hard-hooking, sweet handling, power-capable package for your Camaro or Firebird! If you have drum brakes, brake packages are now a bolt-on, so even your stopping improves. If you have disc brakes, they are a mere bolt-on.
 
 



 
Why ‘just a 10 bolt’?
This is not a repair to the skinny little piece that came in the car.  This is a replacement rear-end that is drastically stronger in every way.  To solve the problem of rear-end breakage in these cars we looked at what was breaking.  Since it seemed to be everything this meant that stronger housing, gears, posi and axles were all required.

How strong is it?
The 8.5” ring gear rear end is a strong, time tested performer.  Its weakest link is probably the spider gears, followed by the axles in “extreme” (i.e. racing) conditions.  We have improved the posi by simply replacing it with a new, hugely strengthened Eaton positraction unit and the axles by installing new 12 bolt 30 spline axles.

Why not 33 spline axles?
We are primarily offering a piece for streetable (race) cars.  It is not designed or intended for back-halved type cars and so that large an axle is simply not required. If this is a worry, why not rifle-drilled 40 spline axles or the diff out of a small Kenworth…. simply not required to get the job done.  Keep in mind every customer has an ‘improved’ engine and drivetrain and this rear-end assembly is the finishing touch.

Why the suspension as well?
We have noticed that the other big problem, apart from breakage, is the lack of traction in these cars. These cars were set up ‘soft’ from the factory to lighten the loads on the powertrain (and hence the warranty) and also to make the car seem more powerful than they were (some people are impressed by tire smoke, others by winning races).  The Global West system allows us to address the ‘hook’ and the handling at the same time, and provide our customers with proven performance in both areas.  This also helps the life of the differential, as ‘come and go traction’ (suspension loading and unloading) is harder on parts than ’hook’.