Quaife Lsd Install - Volvospeed Forums

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Quaife Lsd Install, QDF12J (S40) in to M56H
Johann
Post #1
Hope this helps..
I installed a Quaife S40 LSD in to a '98 S70 M56H gearbox. This particular gearbox uses a shorter 4.45 final drive and an internal clutch cylinder but the gearbox parts are basically the same.
First of all of course remove as much oil from the gearbox as possible before opening the casing.
Put the gearbox on a bench or kitchen table with the clutch bell housing facing down.
"THE MAN"
Options
Nov 19 2006, 02:35 PM
Use a driver to remove the split pin so you can remove the small shifter lever from the gearbox.
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http://volvospeed.com/vs_forum/index.php?showtopic=64440 (1 of 34)5/20/2007 21:41:47
Next unbolt all the 12 mm hex bolts which fix the case split.
After that use a rubber hammer, a piece of wood or a metal bar (with care) to evenly loosen the top casing from the bottom.
There are several places on each corner of the gearbox where you can apply some force to split the casing. Make sure the force is applied evenly!!
While lifting the upper half of the casing try to gently rotate the black shifter lever counter clockwise until the casing comes off.
Once succeeded you will probably be looking at the very nice M56 internals for the first time in your live..
Now locate the only 12mm hex bolt in the internals. The bolt is holding a metal bracket. Remove the bolt and the bracket.
In some cases, with older type geargoxes, instead of a metal bracket there will be a cast alloy part. If this is the case be as careful as you can since the alloy part can break when loosening teh bolt..
Next locate a spring at the bottom of the shifter mechanism and look for a straight extention of the spring which is held behind a nipple. Move the extension over the nipple so the spring tension will be released, next
remove the shifter assy by turning it counter clockwise until it is free of obstructions.
After that the long metal lever bar can be taken out. In the middle of the bar there is a metal pin. With some gearboxes this pin sits loose and can be taken out after which the bar almost falls out of it's position. With
some gearboxes the pin sits tight and can hardly be removed. In this case try to remove the bar using gentle force while moving it around a bit. Don't bend anything!
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This post has been edited by Johann: Nov 19 2006, 03:40 PM
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QUOTE(Che_Moderator @ Feb 7 2007, 02:31 AM)
Confussius say. Flow without HP is like forest with no rain
Johann
Nov 19 2006, 03:07 PM
Post #2
Continued
"THE MAN"
The next step I would advice to get an extra pair of hands. This can be done alone but it is difficult.
The next step the 3 gear packs need to be taken out.
Try to lift the 3 packs straight up while maintaining their position. Make sure to lift straight else the shift fork shafts might lock in their sleeves preventing the packs to lift any further. Use gentle force. Don't stress
anything. The gear packs aren't light either. Once the assy is free of the sleeves you can take the packs apart and put them aside.
Leave the shift forks in their position and grouped with it's gear pack (I didn't..) or take pictures of the situation before taking things apart.
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Next take out the diff gear and put it in a clamp.
I used rubber surfaced clamps to prevent damage to the diff gear.
Next steo the bearings need to come off. I don't have any pictures of it but a special bearing puller is needed, space behind the bearings is very limited and your average K-Mart puller won't do.
On this picture borrowed from Michiel Nouwens you can see the type of puller best used,
After removing the bearings and storing them in a save place the botls can be removed from the diff
And the diff can be removed from the gear by gently tapping it out using a rubber hammer.
Next I degreased the bolts.
Unpacked the Quaife diff from it's box.
Quaife vs stock diff
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Johann
Nov 19 2006, 03:17 PM
Post #3
Continued
After degreasing the gear I installed the Quaife diff in the gear and used 4 bolts to cross tighten the diff in the gear. Evenly tighten the bolts. Make sure the diff goes in straight else it might lock itself in the gear before
it is fully engaged. Don't use any force or large tools. Just tighten the bolts lightly.
"THE MAN"
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After the diff is in place remove the 4 bolts again and apply loctite to them. I have used mild thread locker 243.
Put the bolts back in and cross tighten them to 65 Nm - 48 lb-ft. (Not 100% sure about this but any more and the thread will probably come out)
Put the bearings back on, some special tool is needed. Again don't slam anything out of line, be gentle.
results should look similar to this,
Next put everthing back in to the casing in the reversed order. Take good notice of how the gearpacks need to go back in. Remeber that the shift fork shafts need to go in as straight as possible. Don't force.
Shifter mechanism in place
Don't forget the magnet!!
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Johann
Nov 19 2006, 03:28 PM
Post #4
"THE MAN"
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Same picture again to show the sealing surface. Clean this surface on both the casting halfs. Make sure all the old silicone is removed. Use mild sand paper, I used a sanding block and sponge. Degrease well, apply
silicone and close the box.
Before closing the gearbox make sure the shift fork levers on the shifter mechanism are all in their middle position.
While closing the box move the black shifter lever in the top casing all the way counter clockwise until it blocks. Align the top casing with the shifter shaft and the diff bearing and slide in back on. At some point you
can feel some resistance at the black lever. While lowering the casing at this point the leaver should turn clockwise back in to the shifter mechanism.
Fix the 12 mm hex bolts some something near 30 Nm - 22 lb-ft
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POOKDOG
Nov 19 2006, 03:46 PM
Post #5
WOW
Nicely done, this should work real nice; post up some after comments too. Thanks for the great write up and pics
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viperman135
Nov 19 2006, 04:11 PM
Post #6
Very nice right up. Great job with all the pics.
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BlackT5
Nov 19 2006, 04:55 PM
Post #7
excellent writeup!
--------------------Mark
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JHEIII874T5M
Nov 19 2006, 05:04 PM
Post #8
Wow! Thanks Johann, great write up
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Nov 19 2006, 05:45 PM
Post #9
Somebody, pin this!
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Evil E
Nov 20 2006, 03:34 AM
Post #10
QUOTE(RussB @ Nov 19 2006, 09:45 AM)
Somebody, pin this!
Yes...don't let all that work go away.
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SDSUpaintballpla...
Nov 20 2006, 10:09 AM
Post #11
I look forward to the day that i will need this write-up!
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Carbon_R
Nov 20 2006, 02:24 PM
Post #12
Awesome Johann, just awesome!!
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gdizzle
Nov 20 2006, 02:31 PM
Post #13
You rock Johann!
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Benjam83
Nov 20 2006, 03:38 PM
Post #14
Pshffff! that'll never spool!
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Johann
Nov 27 2006, 12:08 AM
Post #15
QUOTE(Benjam83 @ Nov 20 2006, 04:38 PM)
Pshffff! that'll never spool!
Doesn't need to..
"THE MAN"
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Converted the box to external slave setup this weekend btw. Should have done it while the box was apart because that way it would have been easier to work on the empty casting instead of a complete gearbox..
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'95R
Nov 27 2006, 12:30 AM
Post #16
Definately a great write up Johann
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Guest_MissDMeanor_*
Feb 25 2007, 01:04 AM
Post #17
QUOTE('95R @ Nov 27 2006, 12:30 AM)
Definately a great write up Johann
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MissDMeanor
Feb 25 2007, 01:07 AM
Post #18
Oops, newbie here and messed up already
Johann, thank you for a brilliant thread - you've just saved my life! I have the daunting task of taking my lsd out of my M56h tomorrow.....I wasn't looking forward to it but feel confident thanks to you.
Thank you
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BlackBeast
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Feb 25 2007, 01:23 AM
Post #19
QUOTE(MissDMeanor @ Feb 25 2007, 01:07 AM)
Oops, newbie here and messed up already
You cant take these VOC'ers anywhere can you lol.
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CAKES855
Feb 25 2007, 02:17 AM
Post #20
gret write up Johann
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