35 replies to this topic

[Toranavista]

Fine spline LSD

[GML-31]

as above

[RIM-010]

What ^, ^^ and ^^^ said.

Tim

[Toranavista]

From off the top of my head.

LH/LX V8 LSD Fine Spline
LH V8 Non LSD Coarse Spline
LX V8 Non LSD Coarse Spline until introduction of RTS early 1977
LX 6 cylinder was the same all coarse until RTS then all fine
LX 4 cylinder had the fine spline with the intro of Sunbird ake RTS around Aug 1976.
Production dates on components may appear before these dates.

Perhaps the early 1974 SLR 5000's had coarse LSD but have never seen this.

[yel327]

I always thought the only V8 LSD banjo coarse spline were HK-HG V8.

[yel327]

The parts catalogues say different. The LH and LX list the same part numbers for the 5L gears, and there is no different part number for the L34 either in the supplement of the revised catalogue. It lists the 253 banjo as being coarse spline though, so my statement about the only V8 LSD coarse spline being in HK-HG was wrong as 253 Toranas had them too.

[yel327]

Ok. Parts catalogue for LH and supplement for L34 are both wrong then. Although the really early LH catalogue doesn't list different gears for the 5L, only a different centre.

[Toranavista]

I haven't seen documentation either way but is what i have found in my experience. They did race the LH SLR 5000 and i am now even more impressed with the results given they may have been using a coarse spline banjo. Fair to say Azure Blue would be a pre August 1974 car.

[Toranavista]

Just to clarify a few things. GU7 is just a diff ratio code (2.78). Does'nt stipulate LSD or Non LSD. All LH/LX torana's were built at Dandenong VIC. I have seen one early hatch with a Adelaide Chassis number though. Perhaps a Mule.

[yel327]

The story as per the parts catalogues is as follows. I know this can be fraught with danger as parts catalogues were updated as models progressed but this is what it says and how I interpret it - i'n not saying it's correct, just the story told by the catalogues.

Early LH catalogue shows only 2 x sets of sun gears: LSD and not LSD. this would indicate all diffs were coarse spline.

Later LH catalogue lists coarse spline, coarse spline LSD and fine spline LSD, with the fine spline LSD for 5L only.

L34 supplement only lists what is unique to L34, and the only axle components listed are the diff housing and the axles themselves.

This all would indicate that at release all 5 litre optioned SLR's were coarse spline. However by the time L34 was released 5 litre cars had fine spline centres. I must admit I was surprised by the early 5L cars having coarse spline diffs (especially since fine splines were introduced during LJ). I suppose on reflection it's not too big a stretch to see Holden doing it though, as all the barge ass HT-HG Broughams were coarse spline banjos and these were the same 308 as the LH plus the HK Broughams were an even torquier 307 with the same diff. The coarse spline banjo was also standard or optional fitment on plenty of other HK-HG 307 and 308 Monaros, Premiers etc.
The reason I put faith in the L34 publication is I think it was used for homologation and had to be right, otherwise the L34 would have been racing with coarse spline axles. I talked to Dr Terry about this and he said if the early 5L cars had coarse spline axles then there must have been an update bulletin when the axles switched to fine spline (as he is adamant every 5L LH he has worked on were fine spline). He is going to have a look and see if he can find a copy of such a bulletin.

[Collo]

Damn, Big T opened this can of worms and ran it seems...

Interesting topic nevertheless.

[hanra]

Holy thread resurrection batman!!

 

What do people make of this extract from the LH parts manual. This manual is dated September 1975.

 

What are the 3 various axles types listed?