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10 bolt salisbury question

Started by _jabba_ , Jul 09 2006 10:37 PM

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5 replies to this topic

#1 _jabba_

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Posted 09 July 2006 - 10:37 PM

Can anyone tell me if its possable to bolt 3.08:1 gears to a 2.78:1 centre, i have a 2.78 centre which i know is perfect and makes no noises and a 3.08 currently in the car which is fairly noisy. I was told along time ago that only 2.6 and 2.78 gears could be swaped, same with 3.08 and 3.36 etc... Is that true?

Thanks
Damien

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#2 _UCV80_

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Posted 09 July 2006 - 10:44 PM

Im pretty sure u need to change the spiral cog too (need a matching pair).. i could be wrong

u could put in another 2.78 if im right

im interested to know :spoton:

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#3 _jabba_

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Posted 09 July 2006 - 11:09 PM

I was hoping to just swap the current 3.08 centre for the 2.78 centre but keep the gear set that im currently using. I have 1 working diff and 1 complete centre in a box. I suppose another option is to use a 3.55 1 tonner center i have which is in g/c aswell, not sure how that would be on the h/w tho.

Edited by jabba, 09 July 2006 - 11:10 PM.

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#4 _lx5008_

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Posted 11 July 2006 - 08:27 AM

Can anyone tell me if its possable to bolt 3.08:1 gears to a 2.78:1 centre, i have a 2.78 centre which i know is perfect and makes no noises and a 3.08 currently in the car which is fairly noisy. I was told along time ago that only 2.6 and 2.78 gears could be swaped, same with 3.08 and 3.36 etc... Is that true?

Thanks
Damien

hi damien, in the large salisbury the diff cases are the same. in banjo the banjo case centre is differant. the 2.78 and 3.08 have the longer mount bolts at the bottom.

large salisbury

2.78 2.60 the same
3.90 3.55 3.36 3.08 the same

banjo/small salisbury

2.78 3.08 the same
3.90 3.55 3.36 the same

not only are the matched sets of crown wheel and pinions differant so are the hemipheres. so if you want to change ratios in the large salisbury you have to use the right hemiphere for that ratio.

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#5 makka

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Posted 11 July 2006 - 10:39 AM

but if you have a 3.08 hemisphere you can just change the gears to 3.55? I hope so!

Jabba, its more than likley that its the gears that are making all the noise anyway

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#6 _jabba_

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Posted 11 July 2006 - 10:34 PM

but if you have a 3.08 hemisphere you can just change the gears to 3.55? I hope so!

Jabba, its more than likley that its the gears that are making all the noise anyway

Well i have a 3.08 hemisphere, but it goes knockknockknockknock under no load and squeeks abit when turning tight corners. Well i wont be able to use my 2.78 centre anyway by the sounds of it, i might just try and track down a large salisbury LSD centre with some 3.08 or higher gears, failing that just use the single spinner 3.55 i have. I ran my combo through the gearbox calc and going from 3.08 - 3.55 adds about 500rpm at 110km/h iirc.