XFGHIA747 76 Posted September 23, 2014 Just asking guys if I can change the gear sets on my 2.77 lsd diff centre in my xf ghia, I know later ones can be changed but I have a mate that tryed it once and said it doesnt work? Can someone please confirm why it cant be changed and if it was what was used ? Cheers Share this post Link to post Share on other sites
Campo 869 Posted September 23, 2014 Afaik, 2.77 are different carrier so you'll have to change the whole centre and have it reshimmed and stuff rather than just a gear swap Share this post Link to post Share on other sites
XFGHIA747 76 Posted September 23, 2014 Ahh yes that would be why he said it wont fit due to the carrier being different, it would be interesting to see them both side by side. Share this post Link to post Share on other sites
Campo 869 Posted September 23, 2014 Cant remember the exact difference but definitely are different. Easier to do a housing swap, upgrade to a e series 3.45 lsd Share this post Link to post Share on other sites
XFGHIA747 76 Posted September 23, 2014 They are a direct bolt in from memory arnt they using the stock xf control arms? Never done one to be honnest.. Share this post Link to post Share on other sites
Campo 869 Posted September 23, 2014 Just need to change bushes in the diff end of lower trailing arm to e series ones and use e series tailshaft 1 slydog reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted September 24, 2014 If i remember rightly, the old BW diff housings had to be heated up, or bent to swap gear sets. Been a while, and I drink a lot. Easier to swap for the XR6 diff, I reckon. Â Â Or buy a 9 inch............. 2 XTREME KARTS XF and xe1984 reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted September 24, 2014 If i remember rightly, the old BW diff housings had to be heated up, or bent to swap gear sets. Â From another thread: Â My diff housing squasher: Â The correct method uses a tool that locates in holes either side of the face and pushes the housing apart. Mine squashes it top to bottom for a similar effect and it (somehow) works. 1 bear351c reacted to this Share this post Link to post Share on other sites
jca25 1,034 Posted September 24, 2014 there you go never seen or heard of that before is it only that gear ratio or if u change any of them Share this post Link to post Share on other sites
gerg 10,871 Posted September 24, 2014 That's to remove the preload on the carrier bearings so you can get the carrier out. All Borgie diffs are that way. The pinion comes out through the back after you pull out the carrier. Â You can often pull apart an old diff without the spreader because the bearings are worn and the preload has been lost. Going back together you need it though, the housing needs a couple of thou of preload to be correct. You take your measurements from across the bearing caps using a dial gauge. Â Building any integral-carrier diff properly is very time-consuming and most folks just throw them together and they work most of the time. Share this post Link to post Share on other sites
jca25 1,034 Posted September 25, 2014 That's to remove the preload on the carrier bearings so you can get the carrier out. All Borgie diffs are that way. The pinion comes out through the back after you pull out the carrier. Â You can often pull apart an old diff without the spreader because the bearings are worn and the preload has been lost. Going back together you need it though, the housing needs a couple of thou of preload to be correct. You take your measurements from across the bearing caps using a dial gauge. Â Building any integral-carrier diff properly is very time-consuming and most folks just throw them together and they work most of the time. Â thanks for that gerg i have always just put them togeather and never had a problem i cant even say i have seen my brother inlaw use one on his race car 1 gerg reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted September 25, 2014 From another thread: Â My diff housing squasher: Â The correct method uses a tool that locates in holes either side of the face and pushes the housing apart. Mine squashes it top to bottom for a similar effect and it (somehow) works. Â THAT is awesome.! Would never have thought of that gizmo. Top marks. Â Ya live and learn, everyday. Share this post Link to post Share on other sites
gerg 10,871 Posted September 25, 2014 Thanks mate but I can't take credit for it as I just copied one that I saw. So far so good for success rate anyway. Share this post Link to post Share on other sites
gerg 10,871 Posted September 25, 2014 Just asking guys if I can change the gear sets on my 2.77 lsd diff centre in my xf ghia, I know later ones can be changed but I have a mate that tryed it once and said it doesnt work? Can someone please confirm why it cant be changed and if it was what was used ? Cheers  Sorry we're going off topic... From what I understand, ratios up to and including 2.77 ratio use the 0575 type housing and carrier, with different pinion bearings to suit. 2.92 ratios and above use the 0578 housing and gearsets. There are better experts on here that know the intricate differences but as stated it's just easier to swap in a later 0578 housing and you'll get 4-pinion carrier and 28-spline with it too. Hand brake might give trouble though.  Edited: 0575 and 0578 series instead of 075 & 078 Share this post Link to post Share on other sites
winton 399 Posted September 25, 2014 This is my diff spreader, over night in the freezer shrinks enough to drop in. Only gears that will go on the 2.77 carrier is 2.77 Share this post Link to post Share on other sites
winton 399 Posted September 25, 2014 Doh wrong picture 1 gerg reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted September 25, 2014 I love the smell of gear oil in my fridge in the morning Share this post Link to post Share on other sites
winton 399 Posted September 26, 2014 This picutre shows the offsets 1 gerg reacted to this Share this post Link to post Share on other sites
winton 399 Posted September 26, 2014 I love the smell of gear oil in my fridge in the morningSame Share this post Link to post Share on other sites
gerg 10,871 Posted September 26, 2014 So the one on the left is the 2.77? Makes sense as the pinion will have a bigger diameter and more teeth for a taller ratio Share this post Link to post Share on other sites
winton 399 Posted September 26, 2014 I lifted the picture of another site but yeah pretty sure the 2.77 in on the left. Share this post Link to post Share on other sites
n00bus m@x1mus 465 Posted September 26, 2014 Loads more info can be found Here including said lifted picture Share this post Link to post Share on other sites
gerg 10,871 Posted September 26, 2014 That's a great thread n00bus, answers a lot of questions if you take the time to digest it. Got another question: I seem to remember an ultra-tall ratio that came with XD-XE 351 pursuit cars. I think it was around 2.6 ratio... Or am I on drugs? Would make a great cruising ratio for a 4-speed or non-OD auto. Share this post Link to post Share on other sites
n00bus m@x1mus 465 Posted September 27, 2014 Wasnt it 2.52 or something like that? Yeah would be good with a C4 and a really short 1st. Share this post Link to post Share on other sites
Hofiveo 47 Posted September 27, 2014 My first xe had a 2.53:1 Great for highway bad for getup and go. 2 gerg and n00bus m@x1mus reacted to this Share this post Link to post Share on other sites