I have a damaged LSD diff, the only real damage is on the pinion gear.
Would the pinion and/or crownwheel from an open centre diff fit into an LSD diff?
(If same ratio of course)
Thanks
Standard diff gears fit LSD??
Started by
_mike_nofx_
, Jul 14 2006 04:47 PM
9 replies to this topic
#2
Bazza
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Posted 14 July 2006 - 05:02 PM
Yep! That's what I did recently with a 3.08:1. It cost $440 to swap over and I supplied the crownwheel and pinion. The cost included labour, new bearings and seals etc.
The previous owner of my car did the same with a 3.36:1 (he supplied the CW and P)and it still cost him over $650.
Remember though - the crownwheel and pinion are matched - so both must be swapped over. It's not cheap but you end up with a good diff.
It should be noted that good gearsets are hard to come by. My builder has orders from 6 customers if good gearsets come his way.
Bazza
The previous owner of my car did the same with a 3.36:1 (he supplied the CW and P)and it still cost him over $650.
Remember though - the crownwheel and pinion are matched - so both must be swapped over. It's not cheap but you end up with a good diff.
It should be noted that good gearsets are hard to come by. My builder has orders from 6 customers if good gearsets come his way.
Bazza
#3
_mike_nofx_
_mike_nofx_
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Posted 14 July 2006 - 05:46 PM
$440 is a little steep. Why couldnt you do it yourself?
I should be able to do it myself. Just gotta buy new seals and bearings.
I should be able to do it myself. Just gotta buy new seals and bearings.
#4
shanegtr
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Posted 14 July 2006 - 06:15 PM
They sure do. I'm going to be swaping my 3.55 for a 2.78 or 3.08. Just have to get an open wheeler centre next time Im in perth
#5
Bazza
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Posted 14 July 2006 - 07:23 PM
Re do it yourself:
My brother is a qualified motor mechanic and he was reluctant/wouldn't to do it for me. The diff has to be set-up very precisely to guarantee that it won't be noisy.
It is a job that is best left to the specialists (unless you are happy with a bit of noisy operation). I understand that there is a lot of skill, experience and equipment involved in doing it properly.
I did it years ago (and I am no slouch with a spanner) but it was as noisy as - I wouldn't bother trying it again.
I am sure that someone will chime in to support this statement.
Bazza
My brother is a qualified motor mechanic and he was reluctant/wouldn't to do it for me. The diff has to be set-up very precisely to guarantee that it won't be noisy.
It is a job that is best left to the specialists (unless you are happy with a bit of noisy operation). I understand that there is a lot of skill, experience and equipment involved in doing it properly.
I did it years ago (and I am no slouch with a spanner) but it was as noisy as - I wouldn't bother trying it again.
I am sure that someone will chime in to support this statement.
Bazza
#6
_on the limit_
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Posted 15 July 2006 - 09:08 AM
just beware that the limit slip hemi for the 3.55 is slighty different in height to the 2.78 & 3.08 hemi, & do require a fair bit of adjustment to make it fit.They sure do. I'm going to be swaping my 3.55 for a 2.78 or 3.08. Just have to get an open wheeler centre next time Im in perth
#7
shanegtr
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Posted 17 July 2006 - 01:58 PM
Interesting, I wouldnt have thought they'd be any different. Can you explain a bit more of the difference as Im not sure what your refering to as the "height" of the hemisherejust beware that the limit slip hemi for the 3.55 is slighty different in height to the 2.78 & 3.08 hemi, & do require a fair bit of adjustment to make it fit.They sure do. I'm going to be swaping my 3.55 for a 2.78 or 3.08. Just have to get an open wheeler centre next time Im in perth
#8
_lx5008_
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Posted 17 July 2006 - 02:35 PM
QUOTE (jabba @ Jul 9 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
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.
THIS IS JUST A THREAD ON DIFFS A WEEK OR SO AGO, JUST SHOWING THAT THE
HEMIPHERS ARE DIFFERANT IN RATIOS,
CHEERS
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.
THIS IS JUST A THREAD ON DIFFS A WEEK OR SO AGO, JUST SHOWING THAT THE
HEMIPHERS ARE DIFFERANT IN RATIOS,
CHEERS
#9
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Posted 18 July 2006 - 11:39 PM
the height is different where the crown-wheel bolts go through the hemi, due to the 2.78 crown wheel is thinner but the head of the pinion is alot bigger than say a 3.36 or 3.55 ratio set.Interesting, I wouldnt have thought they'd be any different. Can you explain a bit more of the difference as Im not sure what your refering to as the "height" of the hemishere
just beware that the limit slip hemi for the 3.55 is slighty different in height to the 2.78 & 3.08 hemi, & do require a fair bit of adjustment to make it fit.They sure do. I'm going to be swaping my 3.55 for a 2.78 or 3.08. Just have to get an open wheeler centre next time Im in perth
#10
shanegtr
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Posted 19 July 2006 - 10:53 AM
Ok that clears it up better. I'll have to get my old diffs that are in storage out to have a measure, see if I can make it all work. Either that or I'll have to go 3.36
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