Holden diff / axle codes

[Phreddy]

Can anybody provide me with a comprehensive list - or at least point to the resources - of Holden's axle codes?? I'm talking about the code which appears on the identification plate - for a couple of examples, I know about these ones...

GU4 = 3.08:1
GM3 = 3.45:1

My SV6 has GT9 in the axle code field, I believe that's around 2.89:1 or thereabouts. I'm not looking at changing my diff - yet - but I would like the comprehensive figures to help out with some speedo calibrations.

So if anyone can point me in the right direction, I offer my eternal gratitude. This info must be out there somewhere....

Cheerz all! :thumbsup:

 

[burnz]

GU80 = 2.96:1 from memory

 

[Phreddy]

Thanks Burnz - that's another one to the list.

Cheerz! :thumbsup:

 

[peterj]

You can find quite a few here choose g-m for the rear axle codes.

RPO Codes.com- GM option codes,GM rpo codes,Regular Production Options,General Motors options

My clubbie is GW6 = 3.27

 

[Phreddy]

Outstanding Pete - thanks for that reference Mate, it's excellent! And not just for the diff codes either... :thumbsup:

 

[burnz]

You can find quite a few here choose g-m for the rear axle codes.

RPO Codes.com- GM option codes,GM rpo codes,Regular Production Options,General Motors options

My clubbie is GW6 = 3.27

those code's are wrong or only relate to u.s.a.
they don't match holden codes at all

 

[Calaber]

Phreddy

I don't know if Holden still does it, but they used to stamp the ratio on the diff pinion shaft dust cover.

 

[gerry attrique]

OK , stirring up an old post but what I am chasing is info regarding axle codes and I mean axle's not the centre . I have an lsd BW78 rear assy from a commodore in a 57 chev wgn which spat out an axle recently . Question is , what the hell is this out of ? The axles have casting marks at the axle flange which are 0578 ( BW78 ) and 965 (R/H ) 966 (L/H ) . Although my son and daughter drive commodore's as their daily's we are all old school with no deep knowledge on Commodores and me personally , I am a dinosaur when it comes to my preferences for cruising although I have had a VE SV6 ute and a VE SSVe ute as work vehicles so don't completely condemn me ! If anyone can shed some light on this query for me , I would be very grateful as I have spent considerable time already chasing info on the net and come up empty handed . Appreciated for any help that can be given .

 

[harrop.senator]

Measure the track width itll be vl rarish in bw78 or most probably vn - vs which all axles wagon sedan ute are same lengths v8 or v6 just need specific left n right as lengths differ.

 

[gerry attrique]

OK , Thanks Harrop.Senator ! That will shorten the list somewhat . Will be replacing both axles as with past experience over the years , once you replace one , the other lets go a week or so later . May not happen with the newer cars now due to improved metallurgy etc , but was a regular weird thing that happened with the old girl's . Face of flange to face of flange is 1518 mm . I am assuming the housing and axles have not been cut . Thanks again for your assistance .