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3.45:1 LSD in to 3.08:1 housing 

 

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 Post subject: 3.45:1 LSD in to 3.08:1 housing
Posted: Thu Apr 21, 2005 6:40 pm 
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can the LSD diff centres be put into a single spinner 3.08 diff housing? Or is it easier to just change the whole diff?

 

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Posted: Thu Apr 21, 2005 6:43 pm 
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Its not a backyard job to swap centres unless you know 100% what you are doing, if the LSD is good, just swap that in, otherwise get the centre swapped and the LSD refreshed at the same time.

 

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Posted: Thu Apr 21, 2005 6:56 pm 
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I thought the 3.45 a*** just wouldn't fit in the 3.08 housing?!?

 

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Posted: Thu Apr 21, 2005 7:02 pm 
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AFIK, they are both 28 spline axles so no problem, the gears are not any bigger, just the ratio of teeth change the gearing.

 

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Posted: Thu Apr 21, 2005 7:05 pm 
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data_mine wrote:
I thought the 3.45 a*** just wouldn't fit in the 3.08 housing?!?


thats what i've been told as well when i asked the same question - you'd need the diff housing from a 3.23 & above...

 

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Posted: Thu Apr 21, 2005 7:32 pm 
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ahh well i can always find out :) but i might just swap the diffs over. that sounds easier

 

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Posted: Thu Apr 21, 2005 7:42 pm 
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the gear set is a different size and will not fit into 3.08 housing - unless you have a a*** made for a 3.08 housing (there are two series a 78 and a 75/76 series - one of them will fit into a 3.08 the other wont)

Must Be 3.23 or above to fit one out of a wrecked xr.
The lsd hemi will interchange from 3.08 to 3.45

 

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Posted: Thu Apr 21, 2005 10:51 pm 
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u seem to b e the man with all the answers tonight :)
yeah cheers for that loooks like the whole diff is going in

 

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Posted: Thu Apr 21, 2005 11:36 pm 
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Would it be cheaper to modify the gears (get someone to do it) or to get the whole diff?

I'm not sure whether to get 3.45 or 3.7s anyway.

 

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Posted: Thu Apr 21, 2005 11:45 pm 
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you could prolly get a 3.45 diff for around 500 or so im guessing

 

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Posted: Fri Apr 22, 2005 12:53 am 
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Smackdown wrote:
Would it be cheaper to modify the gears (get someone to do it) or to get the whole diff?

I'm not sure whether to get 3.45 or 3.7s anyway.

Go a 3.7 mate... i changed to a 3.45 from a 3.08 and i cant notice much difference in take off. all i notice is it revs alot harder..... but it did hurt fuel economy a bit so id assume 3.7 would hurt even more..

 

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Posted: Fri Apr 22, 2005 1:04 am 
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??? - I had 3.45 centre put into my 3.08 housing - that's a non LSD centre tho - BUT the transmission place that did it said a LSD 3.45 centre would have been no problem.

In fact I had a LSD centre lined up but the sleazy a***hole in Melbourne I was buying the parts off ripped me off - ie. parts didn't arrive - number not connected anymore etc. (seems real strange for about $320 worth - evidently he was frying bigger fish at the same time). So because I was impatient I just grabbed normal 3.45 centre bits and had them fitted.

 

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Posted: Fri Apr 22, 2005 1:10 am 
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Greenmachine wrote:
??? - I had 3.45 centre put into my 3.08 housing - that's a non LSD centre tho.


depends on what the 3.45 came out of aswell.
these things have been changed and swapped so much now.
if you buy a new a*** you can buy 3.45 to fit all the different series of diffs
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Posted: Fri Apr 22, 2005 1:12 am 
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Looks like I'm gonna have to call a diff place in Perth because I'm hearing 2 1/2 completely different sides.

1: Can't be done.
2: Can be done with or without some modifying.
1/2: Can be done but its not an LSD.

When I know I'll find out.

 

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Posted: Fri Apr 22, 2005 1:15 am 
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xr8 dismantler wrote:
Greenmachine wrote:
??? - I had 3.45 centre put into my 3.08 housing - that's a non LSD centre tho.


depends on what the 3.45 came out of aswell.
these things have been changed and swapped so much now.
if you buy a new a*** you can buy 3.45 to fit all the different series of diffs


Cheers mate....I think that helps a bit more.

 

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