Hey guys
i have a 4age engine with a t40/t50 box.

I currently have the steel mounts that are straight and are bolted to the gearbox.
I plan to put gearbox in place and bend some other THINNER metal as a template for each side then get bent at the correct angle to end up flat on the floor.

I have to get mopunts bent as there about 5 10 mm thick.

QUESTIONS!!!!!!!!!!!!!!!!!!!!!!!!!!

Am i on the rite track???

Do you need to run rubbers?

and do they go where the mount bolts to box or floor???

Any suggestions on where to get correct rubbers????

And should i make another plate that conects the 2 mounts together fo support???

And if so where is the stongest part to conect the 2???

I was thinking somewhere on the flat part where bolts to floor and make a big bend 2 go around the box and conect at same flat part on both sides.....

If some1 has done this before i would love your help 2 answer some of my questions.





Also WANTED
booster
120y
180b
200b

1200 ute door glass

Pm me with price with postage PLEASE

thanks every1

I personally wouldnt bolt it through the floor unless you plan to somehow re-enforce it. I would goto the original boltholes.

If you have the standard crossmember for the T50 that should have a rubber between the box and the x-member. Thats all you need. i would say 3mm is thick enough for a gearbox x-member, but you may want to measure the factory one just to be sure.

deffinately don't bolt through the floor, not strng enough, the meta would twist or contort. yeah three mm sounds about rte, when you put your taishaft in it wont move at all, just vibrate a little bit. it sure does sound like your putting in alot of effort for a cross member, i just used pipe ha ha

the floor wil be strong enough depending on how you mount the gearbox to the crossmember? do you plan to bolt the gbox to the xmembber or just have it sitting on it.

if its just gonna sit on it then the floor in a datsun is plenty strong enough.

its only that if you plan to bolt the gbox to the xmember that you get the torque transferred through the xmember and that will need to be much stronger.

you're gonna want to bolt the gearbox to the crossmember... and the floor is fine, just make a large surface area and have big sandwich plates on the inside. Otherwise make the crossmember wider and bolt it to the floor and the chassis rails.

Hopefully the torque will be taken up by the engine mounts not the gearbox mounts

i made my toyota box crossmember outta some 50x5mm steel bar.
bolted it through the floor with some plates on the inside of the car.
solid as an ox

There are alot of members on this site that installed different gearboxes in their datsuns that the original gearbox mountings fitted inside the tunnel are not adequate for.
Some people that will be of good assistance are:
B120dat
kululadotgroen (installing a 4AGZE with turbo and a toyota gearbox)
Converted
WhiteSedan

There are pictures in B120dat's album about his gearbox crossmember.
Who is the member again with the neat and tidy green 1200 with CA18DET engine in it?
I cannot remember right now, but he also has a custom gearbox crossmember.
Send the mentioned members PM's and ask them for advice.

You will have to install a rubber mount between the gearbox and the custom gearbox Crossmember so that the gearbox can flex when torque is applied to it. If there is not a rubber mount your gearbox will try to flex and in time tear your floor open if you go the gearbox crossmember bolted through floor plan route.
Unfortunately I do not know how to glue or fix the rubber to the custom crossmember and then again to the metal plate that will be bolted to the gearbox.

I think it is not a good idea to just let the gearbox rest loosly on the custom crossmember.It is unsafe and will cause shuddering.It must be fixed using rubber mounts.

ok so "sitting" wasn't the right word.

i just meant to say that unlike the standard xmembers that bolt the gbox to the x member, the one i have on my T50 set up has the gearbox on rubber mounts (about an ich high) on the xmember. which is bolted to the floor with 2 nuts on each side and a plate inside the cabin with bolts welded to it that go through the floor. inbetween the plate and the floor and the xmember and the floor is 3mm rubber to stop any vibrations.

it is made such that the gearbox cannot move in the tunnel as it is such a tight fit so there is no need to bolt it to the gearbox

Why don't you use the standard 4age one??

I did...can't remember but I may have reversed it??

Quote:

standard 4age gearbox crossmember? Its for a fwd gearbox?