when i start in low gear i get a bang bang band noise banging me from under the armrest..  what would be causing that??

 

Arm rest door, or arm rest console?

Probably a broken diff mount and strap.

arm rest console area - only happens when car is driving/ sometimes ok -  sometimes banging/knocking right behind/seat or under armrest,..

how in the world do i get a new strap in there?? i guess i need to crawl under and see what it is..

oh.. maybe thats why the car was in gear and would not go anywhere ...?:*^%#$% until i reved it a bit in neutral...

hmmm

Edited June 14, 20213 yr by Shawninvancouver

what causes the banging?/ the strap flapping around? or a mount banging around?

can the strap be replaced without moving  diff and muffler ??? 

where is the strap? under the black rubber pad and mount? or to the rear of the car beside the mount??

great photo

23 minutes ago, Shawninvancouver said:

great photo

The strap is visible in the picture.  It looks like a strap.

The noise is caused by the nose of the differential lifting up and bumping the stuff in the transmission tunnel and/or the diff nose dropping down and banging off of the crossmember after it lifts up.

p.s. don't mess around under there unless you have some good jack stands supporting the car.  It's a lightweight car but still heavy enough to crush.

Edited June 14, 20213 yr by Zed Head

15 hours ago, Shawninvancouver said:

what causes the banging?/ the strap flapping around? or a mount banging around?

can the strap be replaced without moving  diff and muffler ??? 

where is the strap? under the black rubber pad and mount? or to the rear of the car beside the mount??

great photo

The strap can be removed without dropping the diff, depending on what you replace it with you might need to drop the diff to install the parts. 

Edited June 14, 20213 yr by heyitsrama
typo

what are the other options to put back there instead  of the strap??  i will take this to a shop to get it done.. an old mechanic with datsun experience.. hopefully he can get it done... are there after market mounts, straps, rubber bushing etc...??

https://www.technoversions.com/DiffMount.html

In the attached video do you see something hanging out the bottom of the car as it drives farther away??? I think I see something and it ain’t the exhaust I don’t think. 

You should create a youtube channel and put your videos there.  I've only been able to play a couple of them.  Your latest one won't play.

If you lay down under the fuel tank and get a photo it will be easier to tell. It looks like the exhaust going under the diff mount…

+1 on the techoniversions diffmount, it’s great.
If the diff is bouncing around you might need a new lower diff mount too.

some people make new straps, that’s also been documented in other threads.