GN diff and transmission into 81 Olds

[corkatoa]

Before I get too excited in my little assumption bubble, I thought I would ask this question.
Is my GN rear/transmission/driveshaft going to pop right into my Olds? 305 SBC at the moment. Many engines lurking in my shop with a chance at getting in there, just not this summer. I know the diff is going to slide in, just suddenly had this random moment of doubt pop up.

 

[spidereyes455]

Diff and driveshaft go right in with no mods or issues. The GN trans however will require the correct crossmember which uses a mount farther back on the drivers side that is not present on 78-82 or 83 frames though there are aftermarket brackets available to take care of that.

 

[corkatoa]

Car currently has a turbo 350 in it.
Do you mean a new crossmember is needed? Always like getting new parts.

 

[spidereyes455]

Yes, 200-4R uses a different crossmember

 

[corkatoa]

Thanks, my bubble has burst into the reality zone.
Just checked a few threads, found these... I can do this...... or some version of this anyways.

 

[B's 87mcss]

You might want to check out Iceman crossmembers, they are referred to lots in this forum. I have one under my 4R.

 

[84GP455]

My vote is for the G-force cross member, thicker steel and heavy duty.

 

[81cutlass]

That 1st one that looks like a heavy equipment mechanic fixed it is actually mine. 2004r in my cutlass.

I did this one with the correct crossmember for a 2004r and welded up the frame extension for my 80 wagon.

Its 2" angle iron I cut down and welded a bit. They sell these extensions also.

 

[corkatoa]

I guess I should have removed tv cable as well. Forgot about that.
Is there electric lock-up on the GN transmission?

That 1st one that looks like a heavy equipment mechanic fixed it is actually mine. 2004r in my cutlass.

I did this one with the correct crossmember for a 2004r and welded up the frame extension for my 80 wagon.

Its 2" angle iron I cut down and welded a bit. They sell these extensions also.
View attachment 113104
View attachment 113105

 

[pagrunt]

Yes.