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3.90 large salisbury crown wheel n pinion

does anyone have a set

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#1 a9x868

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Posted 02 December 2013 - 09:55 PM

i believe this ratio is out there somewhere
and wanting to keep the large salisbury
not interested in going 9 inch
want to have a play with a spare diff housing
and 5 speed box 5th gear being overdriven so it will
still cruise
don't want 3.55 or 3.36
any help appreciated

#2 dattoman

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Posted 02 December 2013 - 09:58 PM

Can't say I've ever heard of a 3.9 .. but it could exist



#3 76lxhatch

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Posted 03 December 2013 - 06:22 AM

Isn't that the ratio that was on the homologation papers but not produced? I think even if there were a couple made for racing you probably won't manage to lay your hands on a set :-(

#4 yel327

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Posted 03 December 2013 - 06:32 AM

3.9 banjo are a mix of gears from other ratio sets. I wonder if you could do the same with a 10-bolt? Get the gears lapped, would it work?

#5 ht467

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Posted 03 December 2013 - 06:44 AM

They were made I believe for one of the race teams for tracks like Winton. I think there were only something like 30 or so sets made and I know of a couple of people that have them but would be no chance of selling. Is some talk of trying to get some gear sets for the large Salisbury remanufactured for the Group C racers, IF this happens this ratio would probably make it onto the list to get done.



#6 Struggler

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Posted 03 December 2013 - 06:56 AM

I don't think you will find a set these days.

 

The only set I ever saw got destroyed in a Group C race a few years ago and I know the owner paid a ridiculous amount for them.



#7 yel327

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Posted 03 December 2013 - 08:18 AM

Other option might be to get a Borg Warner centre conversion done?

#8 Swarbs

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Posted 03 December 2013 - 10:57 AM

 Dave
Spoke to a bloke who has a set
Apparently there was 10 sets made by request from PB to run in his car at Winton
He was chasing the edge over the other Torana's and requested they were homologated as an option

Sets were made and the official word came through the day before the race day - PB already had a set in his car for the day and raced with the ratio on that day

Please don't shoot me down fella's -- only going on what i have been told :)

 

Will ring you Dave with a possible lead
 



#9 WhiteA9XS

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Posted 03 December 2013 - 09:09 PM

Other option might be to get a Borg Warner centre conversion done?

.

Has this been done before ? are we talking removing the axle tubes and putting the torana ones on the cast centre

or changing the internals over , ring gear and pinion etc , would say there would be some neat machining work involved !



#10 a9x868

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Posted 03 December 2013 - 09:14 PM

.
Has this been done before ? are we talking removing the axle tubes and putting the torana ones on the cast centre
or changing the internals over , ring gear and pinion etc , would say there would be some neat machining work involved !

i was just about to ask the same thing!
don't know about this conversion
can you explain! yel327

#11 yel327

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Posted 04 December 2013 - 05:18 AM

They put the Borg Warner internals in the 10-bolt housing. I thought you blokes would be all over it already. It is a mob in Sydney, can't remember the name. Someone here will know who it is that does it.



#12 76lxhatch

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Posted 04 December 2013 - 06:17 AM

I thought that was just the 4 spider centre conversion though? Everything is roughly the same size so I guess a gear conversion could be done, but nothing is a straight fit.

#13 axistr

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Posted 04 December 2013 - 06:26 AM

My B/W 78 has 3.9 LSD. Diff trans spares in Windsor converted it for me



#14 yel327

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Posted 04 December 2013 - 06:34 AM

It is a conversion. Been thinking, might have been G&J differentials in Dandenong. You may be right though, probably still uses 10 bolt gears, just the BW hemi. So won't help with circa 4:1 gears.

#15 a9x868

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Posted 04 December 2013 - 08:37 PM

I thought that was just the 4 spider centre conversion though? Everything is roughly the same size so I guess a gear conversion could be done, but nothing is a straight fit.

 
 

My B/W 78 has 3.9 LSD. Diff trans spares in Windsor converted it for me

 
 

It is a conversion. Been thinking, might have been G&J differentials in Dandenong. You may be right though, probably still uses 10 bolt gears, just the BW hemi. So won't help with circa 4:1 gears.

thanks very much guy's
i'll have to do some research and make some calls

#16 a9x868

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Posted 10 December 2013 - 10:16 PM

i believe this ratio is out there somewhere
and wanting to keep the large salisbury
not interested in going 9 inch
want to have a play with a spare diff housing
and 5 speed box 5th gear being overdriven so it will
still cruise
don't want 3.55 or 3.36
any help appreciated

bump!
still want a set of 3.90 gears

#17 Swarbs

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Posted 10 December 2013 - 10:25 PM

No good with the Vic number Dave?



#18 a9x868

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Posted 11 December 2013 - 12:26 AM

No good with the Vic number Dave?

no!
nice guy didn't elaborate on parts
passed on another contact but no luck there either
many thanks anyways dave!
still looking

#19 dattoman

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Posted 10 January 2014 - 09:10 PM

How does one identify such a thing 

Rather than picking up small sailsbury/UC ones by mistake ?



#20 _The Baron_

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Posted 11 January 2014 - 09:41 PM

Would it be via the number of bolts to mount the crown gear?

 

10 bolts for large (HQ A9X)

 

8 bolts for small (bango/UC)



#21 dattoman

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Posted 11 January 2014 - 10:00 PM

There was a guy on facebook claiming to have 2 sets

 

Mysteriously sold before I was allowed to look despite my insistence I wanted to pay

 

I tried



#22 xu1_lc

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Posted 13 September 2021 - 10:23 PM

I think i have one of these diffs can anyone help in identifying

please send me a PM

#23 a9x868

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Posted 14 September 2021 - 09:33 PM

mate 

i have pics somewhere 

pm me your email and fb profile 

give me a little while 

PM me some pics of what you have or email me

davemca9x@gmail.com 



#24 xu1_lc

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Posted 15 September 2021 - 01:28 PM

Thanks Dave


Email sent

#25 dattoman

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Posted 15 September 2021 - 08:05 PM

Attached File  sails39.jpg   177.61K   9 downloads

 

Attached File  sails391.jpg   174.28K   7 downloads

 

Attached File  sails392.jpg   181.68K   9 downloads

 

Attached File  sails393.jpg   153.95K   9 downloads






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