Hi im wanting to do a diff conversion on my UC hatch using a BW78. I cant use the diff that is in the car at the moment but have access to an LX diff.
Can i cut the diff mounts of the LX diff and use them for the conversion on the BW to fit my uc? Has anybody ever made there own mounts? If so any suggestions
cheers
lx vs UC diff mounts
Started by
_keg006_
, Aug 08 2010 04:56 PM
22 replies to this topic
#2
dattoman
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Posted 08 August 2010 - 06:16 PM
The top mounts will be in the wrong spot if you use the LX as a template
Lower is fine though
The top mounts are at a different angle
Lower is fine though
The top mounts are at a different angle
#3
Orange SS
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Posted 17 August 2010 - 04:29 PM
I've recently bought a BW to go into my LX which was made to suit a UC. I called Aussie diffs in Currumbin QLD and they told me the the lower mounts will need moving aswell but everyone here has agreed with dattomans comment above in previous threads. Its confused me???
#4
TerrA LX
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Posted 17 August 2010 - 04:37 PM
You will be better off using the mounts off the LX diff as the top ones on the UC will not be easily removed.
All the mounts on the BW78 will need removing.
All the mounts on the BW78 will need removing.
#5
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Posted 17 August 2010 - 04:42 PM
The BW had already been fitted with UC mounts prior to me buying it. And cut down to standard torana width etc etc.
Maybe the guy at Aussie diffs missunderstood me when I told him about it. He told me to get an LX diff to replace the top and bottom UC mounts as the UC bottom and top differ to LX diffs? I'll find out when I take it all down to him in the coming weeks. Either way I have an LX diff to cut up
Maybe the guy at Aussie diffs missunderstood me when I told him about it. He told me to get an LX diff to replace the top and bottom UC mounts as the UC bottom and top differ to LX diffs? I'll find out when I take it all down to him in the coming weeks. Either way I have an LX diff to cut up
#6
TerrA LX
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Posted 17 August 2010 - 06:32 PM
Bottom are the same, LX and UC.
#7
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Posted 18 August 2010 - 11:51 AM
I called up Aussie diffs again this morning. If the diff was made to suit a UC and I want it changed to an LX, they have recommended that I remove top and bottom mounts and replace with LX ones. They've said the UC bottoms do fit, but the diff will sit at a different angle to a standard LX.
It's only $200 to get them to do all 4, so I'll get them to do it then if there's any dramas I can ask them 'whats wrong?.
It's only $200 to get them to do all 4, so I'll get them to do it then if there's any dramas I can ask them 'whats wrong?.
#8
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Posted 18 August 2010 - 01:28 PM
Very interesting, sounds like they are looking after you, see if you can get the angle differences off them and post them up here please?
#9
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Posted 18 August 2010 - 01:30 PM
yep no problem. I'll be heading in saturday morning. I'll try to pry as much info as I can.
#10
TerrA LX
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Posted 20 August 2010 - 10:32 PM
Maybe take some detailed before and after pics, preferably with the arms attached and a maybe a tape measure over them, in particular, position the diff flange the same distance from the ground and take some end shots, showing the different lower bracket positions.
Also the distance between the top arm centres, both on the top of the diff and at the floor end.
I still can't see the lower brackets being in a different position unless the upper arm location changes pinion angle between the two model cars...but that would change the whole setup throughout the suspension travel.
Also the distance between the top arm centres, both on the top of the diff and at the floor end.
I still can't see the lower brackets being in a different position unless the upper arm location changes pinion angle between the two model cars...but that would change the whole setup throughout the suspension travel.
#11
_suxgas_
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Posted 30 November 2010 - 01:18 AM
Hi all any info on this as i maybe buying a 9" out of a UC and want to know the difference or go get the mounts changed to suit LX....
#12
yel327
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Posted 30 November 2010 - 08:02 AM
Guys, just use the top mounts of a HQ-HZ 6cyl sedan/wagon/coupe banjo. These are in the exact same place as UC top mounts. UC mounts were moved so they could use the HX-WB diffs.
I think they are having you on about UC lower mounts being different though. I've used banjos in UC's before by simply welding HQ-HZ top mounts onto a LH-LX banjo and it all worked perfectly.
I think they are having you on about UC lower mounts being different though. I've used banjos in UC's before by simply welding HQ-HZ top mounts onto a LH-LX banjo and it all worked perfectly.
#13
_suxgas_
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Posted 30 November 2010 - 08:57 AM
So either way i would have to cut the UC mounts off and get LX-LH mounts set up on the 9"
#14
yel327
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Posted 30 November 2010 - 11:54 AM
Yes, yours is opposite, so get an old LH-LX banjo for the mounts.
#15
_nemo355v8_
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Posted 30 November 2010 - 12:22 PM
Its only the angle of the top arms that are different.
Its as simple as getting the old mounts cut off and welding on the modle specific top mount, UC for UC. LH/X for LH/X.
There maybe a slight differnce on the bottom arms but I doubt it is any thing to worry about.
A fool mate of mine used a LX Bango in his UC and managed to get the top arms bolted up, It was putting a lot of distotion in the bushes thou.
A guy on Ebay makes adapter arms for UC to LH/X change overs.
http://cgi.ebay.com....=item230beaa166
Its as simple as getting the old mounts cut off and welding on the modle specific top mount, UC for UC. LH/X for LH/X.
There maybe a slight differnce on the bottom arms but I doubt it is any thing to worry about.
A fool mate of mine used a LX Bango in his UC and managed to get the top arms bolted up, It was putting a lot of distotion in the bushes thou.
A guy on Ebay makes adapter arms for UC to LH/X change overs.
http://cgi.ebay.com....=item230beaa166
#16
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Posted 30 November 2010 - 06:23 PM
A guy on Ebay makes adapter arms for UC to LH/X change overs.
http://cgi.ebay.com....=item230beaa166
Wouldn't they induce binding and also allow the diff to move around as the mounting points are not parallel?
#17
View GaragePosted 30 November 2010 - 11:44 PM
^ The mounting points in those arms are (or at least are intended to be) parallel...? It would be a problem if there was only a single bend and the pivot bolts were at different angles but I can't see any binding issues with those provided they clear everything.
#18
_rocket_
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Posted 01 December 2010 - 01:17 AM
The days of cutting up old diffs are gone, all new brackets are available. I was talking to this guy at Lakeside on the weekend.
http://www.altra9.com.au/
http://www.altra9.com.au/
#19
TerrA LX
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Posted 01 December 2010 - 02:25 PM
Can't see the new brackets on the web site???
#20
_Kush_
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Posted 01 December 2010 - 04:06 PM
How on earth do you cut off the upper mounts to weld them to a new diff?
I had a look at my diff today and it's cast steel.
See pic
Can someone please un-confuse me?
I had a look at my diff today and it's cast steel.
See pic
Can someone please un-confuse me?
#21
_rocket_
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Posted 01 December 2010 - 04:16 PM
Yeh, I didnt see them on there either, but has was telling me how it is such a long process to cut the off and dress them, and weld the onto the housing, and most people dont want to pay for the time it takes, so they have new brackets made for all holdens, so you end up with a nice neet job, and a bracket that hasnt been stressed for 30 yrs.best give them a call for more info, very helpfull guys.Can't see the new brackets on the web site???
#22
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Posted 01 December 2010 - 04:19 PM
How on earth do you cut off the upper mounts to weld them to a new diff?
I had a look at my diff today and it's cast steel.
See pic
Can someone please un-confuse me?
I d say more in the case of yours, it would be a 9 inch going into a UC, and using new LX style brackets to weld onto a steel housing, rather than the cast unit you have.
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