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#1
Help identify R31 diff
Avizhome
Posted on: 2017/10/17 9:37
Hi Guys,
I picked up a r31 diff recently, however not sure the type of it. Can someone please help me identify it? It has a 9-bolt rear cover and 6-bolt tailshaft flange Thanks in advance :) Kind regards Ron Attach file:  Capture.JPG (68.08 KB) Capture2.JPG (47.98 KB)  
#2
Re: Help identify R31 diff
ddgonzal
Posted on: 2017/10/17 9:58
9-bolt cover is fairly unique - it is a Borg Warner 78. If it really came from an AUS-built R31, it could have either the 25 spline (R31 Pintara) or 28 spline (R31 Skyline) axles
You can confirm if the 3.89 ratio is still in there by examining the numbers stamped on the crown wheel (ring gear). Divide the two numbers The 28-spline unit is rated for 320 ft. lb. torque, about what a 5.0 V8 puts out
#3
Re: Help identify R31 diff
Avizhome
Posted on: 2017/10/17 10:04
Thanks dd,
Is there a way to tell if it is a 28 spline or 25 spline?? Kind regards, Ron
#4
Re: Help identify R31 diff
dattoman_1000
Posted on: 2017/10/17 12:00
3.89 is the Skyline ratio... so should be 28
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