30 replies to this topic

[Shtstr]

Ok i know lh and lx diffs are interchangeable. I know uc have a different location for the top trailing arm mounts.
But today i was informed by a well known diff shop that the uc rear lower trailing arm mount was located in a different position to lh lx as well. This i don't understand why as they all run the same lower trailing arms.
Can anyone shed some more light on this please.

[Toranamat69]

Not as far as I know.

[TerrA LX]

^ Im with him.

[Shtstr]

Same here. Only the top mounts are in a different positions/location. They where trying to tell me that they where rotated further around for the center of the axle line. This i don't get as both have same trailing arms and the axle line i would think to be the same as both have approximately the same size axle tube.

[TerrA LX]

I think there might be something in that, I think I have seen a few race cars with that mod.

[TerrA LX]

 

[Shtstr]

What mod. Penard rod?

[TerrA LX]

I meant rotating the mount or the whole diff rearward to install a longer trailing arm.

Edited by TerrA LX, 31 May 2017 - 10:07 PM.

[dattoman]

Same same on the lower

[TerrA LX]

^ thats what I thought.

[Shtstr]

As far as i know lower arms are same length. So why would the bracket be rotated more on the uc diff as they are same size arm and same size axle tube.

Edited by Shtstr, 31 May 2017 - 10:29 PM.

[Shtstr]

So looking at the diff from the end they are saying that the bottom bracket is rotated differently to the lx one and the mounting bolt hole for the lower arm is in a different location to lx. But they have the same lower arm length.
Can anyone confirm what i have just tried to explain. I would upload a pic but the page won't let me off my phone.

[Shtstr]

I know years ago i fitted an a9x diff to my lx ss and only had to change upper arms to suit. Other then that it was a straight fit.

Edited by Shtstr, 01 June 2017 - 12:14 AM.

[Shtstr]

I meant rotating the mount or the whole diff rearward to install a longer trailing arm.

On a race car i could slightly uderstand to be able to change roll center of pinon for more or less trackshion. But all street cars where the same asfar as i know on the lower diff mounting points for the standard factory trailing arms.

[Shtstr]

Just stole my sons laptop to add photo, so what they are saying is that the lower bolt hole for the lower trailing arm is in a different location to lh lx torana. According to them the  1496285152231953266113 (1).jpg   66.27K   6 downloads  1496285152231953266113 (1).jpg   66.27K   6 downloads bracket is rotated more then lh lx to get pinion angle correct. Can anyone confirm this as i was always of the belief that they where the same and only the top arms where located different as they use the salisbury diff with the mounts cast onto the centre of the diff instead of welding them on as per lh lx.

Also both trailing arms top and bottom are the same length as far as i know too.

Edited by Shtstr, 01 June 2017 - 01:22 PM.

[myss427]

The floor mount holes are further forward not the diff lower mount. Was changed first on A9X's, to correct pinion angle as the top arms being closer together, same applies with UC and the small Salisbury diff. All Torana ( LH, LX UC) control arms are interchangeable.

[Shtstr]

So an you would need longer lower arms for a modified lx diff in a uc. And top arms need to have an off set to pick up top mounts to keep the diff in center of wheel tub. ??

Or just top arms only.

[hatchssv8]

MYSS427 is spot on

....different hole location (Body side) Lower rear arm

[Shtstr]

I remember years ago putting an a9x diff in a std lx SS and all we did was modifi the top arms and it sat perfectly in the wheel well.

[Shtstr]

From memory the pinion on the a9x diff pointed downwards in the std lx hatch when we first fitted it in. So we made longer top arms to rotate the diff in order to align the pinion to the correct angle. So im assuming it would be the reverse to fit the lx diff into a uc to get correct pinion angle.
By now most of you might be wondering why i want to put an lx diff in a uc. Simple diff shops won't weld top mounts to the cast steel center of a borgwarner diff. So i have to get it made to suit lx and then make it all fit together with modified arms.

[Toranamat69]

I have uc and lx hatch here. Ill see if I can pick a difference on the weekend.

[TerrA LX]

By now most of you might be wondering why i want to put an lx diff in a uc. Simple diff shops won't weld top mounts to the cast steel center of a borgwarner diff.

Never afraid to ask a stupid question, is it finances that prevent you fitting a salisbury to negate welding the top?
There are some heavy duty centres available these days.

[Shtstr]

I have uc and lx hatch here. Ill see if I can pick a difference on the weekend.

Also if you could measures from front engine crossmember bolt on the front chassis rail to the lower bolt hole for the rear lower trailing arms shoul give more evidence if it was moved forward or back to suit the Salisbury diffs in a9x and uc as stated above by myss427.
Thank you.

Edited by Shtstr, 02 June 2017 - 09:29 AM.

[Shtstr]

Never afraid to ask a stupid question, is it finances that prevent you fitting a salisbury to negate welding the top?
There are some heavy duty centres available these days.

No diff ratio that is required for this specific conversion. Otherwise yes i would of just put a ten bolt in it with Bullitt 4 pin center.

[UCSLE]

would be more easy to use a cortina diff than a LX diff in a UC