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LC GTR Gearbox crossmember


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#1 Flaming Skull 57

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Posted 19 November 2020 - 05:12 PM

Hi All

 

I have a LC GTR Torana 4 speed and I'm putting it back together and bolting up the rear gearbox member. The issue I'm having is it could bolt up in two places. I mean if I push it forward it will fit into one set of holes but if I pull it back it will fit into the back holes. There are several positions I can bolt the cross member to but which is the right one? If I use the back holes it looks like I would need a spacer between the cross member and the chassis. Any ideas?

 

Cheers John



#2 S pack

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Posted 19 November 2020 - 05:21 PM

Opel 4spd or Aussie M20 4spd?



#3 Flaming Skull 57

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Posted 19 November 2020 - 05:41 PM

Aussie 4 Speed



#4 S pack

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Posted 19 November 2020 - 05:49 PM

If it is an LC and 1972 LJ gearbox crossmember do you have the spacers that go between the member and the chassis rails?



#5 Flaming Skull 57

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Posted 19 November 2020 - 06:28 PM

It an LC 1971 and after all this time I can't remember if there were spacers



#6 S pack

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Posted 19 November 2020 - 07:27 PM

See post #63. http://www.gmh-toran...s-member/page-3



#7 Flaming Skull 57

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Posted 20 November 2020 - 04:43 PM

Thanks Dave. I've got the spacers. Which are the correct holes to bolt the cross member into. There are seven. Some are obviously wrong   but I have  two bolt hole options.

 If I use the forward option that leaves the back two holes exposed.

If I use the back hole option it leaves only one bolt hole exposed

What I mean is if I use the front holes the engine is  closer to the radiator. Perhaps someone can tell me what is the distance of the fan from the radiator in a GTR manual. Cheers 



#8 S pack

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Posted 20 November 2020 - 05:36 PM

John, the position of the engine sitting correctly on it's mounts will dictate the position of the gearbox crossmember.

For reference here is a 1972 LJ with Aussie M20.


Attached File  LJ Aussie M20 crossmember mounting.jpg   200.33K   5 downloads



#9 Flaming Skull 57

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Posted 20 November 2020 - 06:10 PM

Thanks Dave.  A picture speaks a thousand words.. Much Appreciated Cheers John



#10 Flaming Skull 57

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Posted 20 November 2020 - 06:23 PM

There is  a bit of a difference where the crossmember bolts up onto the chassis( a gap at the rear ) where the two channels coming together. should I put a washer there or just bolt it up on the angle.



#11 S pack

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Posted 20 November 2020 - 06:54 PM

Just bolt it up with the spacers between the rails and the crossmember. That is how they were built.



#12 grumpy xu1

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Posted 20 November 2020 - 09:25 PM

John, the position of the engine sitting correctly on it's mounts will dictate the position of the gearbox crossmember.
For reference here is a 1972 LJ with Aussie M20.

attachicon.gifLJ Aussie M20 crossmember mounting.jpg


If you follow what Dave stated here, literally it can only go in the correct place. The spacers out on the bottom of the chassis are 1/4" thick to.




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