I got 71B 5 speed bellhouse from one of my friends. I decided to move onto 240SX transmission swap into my 280z.

First of all, bellhouse comparison. It looks like there are several different 71B bellhouse with a bit different pattern.

This is my original 71B 4speed. It's written "L2"

This is the 71B 5speed bellhouse I got. It also written as "L2"

This is 240SX 71C bellhouse. It written 71B...

with some animal?

I found some pic in internet that is written 71C for 71C bellhouse.

Now mechanical is OK.

I started cleaning tranny case.

Taking hot tub.

over night.

grind sharp edge

Masking it.

and paint it.

 

I notice peach tree in my back yard grew up too much.

 

Trim it while waiting for paint dry

 

and finished.

 

Finished Welding tranny mount.

Fitting test.

a bit touching with tranny. I need to grind the edge.

 

by the way, which way is front?

 

Your top photo where it is facing towards the front has it in the right direction. It should be leaning forward at the top, if that makes sense. I can post a photo of mine later. I'm not sure why they made them like that. Maybe someone can explain why?

Your bracket turned out nicely. Looks straight, and no distortion from the welding, which can happen easy on thin metal like this. Trim if up a bit and a coat of paint and it will look neat.

Thanks Chas for the info!


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The sloping design might be to drive the tail of the transmission downward under braking or impact.  Maybe.  

Hate to be my usual contrary self but I think the second picture might be the way.  If I read the illustration correctly.

 

 

Mmm thats funny. Mine is backwards and the original, I replacdd as well. I can remember it binding a little when I tried it the other way around, so I checked the old one on some photo's and mounted it the same way.

It's still a mystery to me why it's shaped like that.

I grinned touching area and primed.

and spray leftover undercoat.

 

Tranny mount is completed.

Hard to tell for sure, but those welds don't look like they got much penetration.... Looks like you ran out of gas during the MIG welding. 

Hope they are good!

Here's an alternate method.  Chop saw, metal blade, and some hardware store parts.  Load-wise, I think the end result is about the same, but you do lose the rubber damping on the ends, so only the center mount is damping vibrations.

Only adding for future searchers.  For those that don't have a welder, like me.

 

That's nice one!