Haynes Forums

Haynes Forums (http://www.haynes.co.uk/forums/index.php)
-   General discussion (http://www.haynes.co.uk/forums/forumdisplay.php?f=10)
-   -   A few questions before i go any further... (http://www.haynes.co.uk/forums/showthread.php?t=3249)

car.mad 12th December 2009 04:06 PM

A few questions before i go any further...
 
hello, have a few questions before i go any further and make a muck up of anything. here goes...

in regards to the transmission tunnel is there any different modifications that need to be done to recieve either the TYPE 9 or MT75 gearbox? if so are these listed anywhere, had a look but no joys.

and whats the main differances between the two gearboxes? seem to think one will have better acceleration and the other top speed, not sure which way round

what nut and bolt grades do i need to use before i go out and buy any?

what thickness metal are the suspension brackets and shocker brackets made from? the book dosn't seem to say.

when do i fully weld the chassis?

any help much appreciated

Cheers

Jake

Tatey 12th December 2009 04:14 PM

The transmission tunnel needs to be modified in order to fit the MT75 gearbox, as the box is wider than the type 9, i think guide is in the book amendments thread in the announcements section.

I THINK you're needing at least 8.8 grade bolts, im not sure what nuts you need though.

Again i THINK the suspension brackets are made out of 3mm plate mild steel.

You fully weld the chassis after tacking all of the suspension brackets in place.

I hope this helps.

flyerncle 12th December 2009 04:29 PM

Nyloc nuts and make sure the bolts are not fully threaded,most are 12mm dia.

londonsean69 12th December 2009 05:14 PM

Quote:

Originally Posted by car.mad (Post 26835)
in regards to the transmission tunnel is there any different modifications that need to be done to recieve either the TYPE 9 or MT75 gearbox? if so are these listed anywhere, had a look but no joys.

A simple search for "MT75" turns this up
Link to Thread with Individual images - scroll down to posts 26-28

Direct link to Post 26
Direct link to Post 27
Direct link to Post 28

Quote:

Originally Posted by car.mad (Post 26835)
and whats the main differances between the two gearboxes? seem to think one will have better acceleration and the other top speed, not sure which way round

MT75 is newer, bigger, and 5 speed.
Type 9 came in either 4 or 5 speed.
MT75 can take more power, but there are a lot of Type 9s with 180+bhp running through them. The roadster is a lot lighter than the sierra, so less strain on the tranny.

Quote:

Originally Posted by car.mad (Post 26835)
what nut and bolt grades do i need to use before i go out and buy any?

8.8 and make sure they are marked on the head to indicate this.
I've actually got some 12.9 in certain places

When assembling the suspension, use normal nuts to start with, then when you are sure everything fits/has the clearance it needs, then replace with Nylocs. Makes it easier to do up/undo everything, and doesn't wear out the nylocs

Quote:

Originally Posted by car.mad (Post 26835)
what thickness metal are the suspension brackets and shocker brackets made from? the book dosn't seem to say.

3mm

Quote:

Originally Posted by flyerncle (Post 26837)
Nyloc nuts and make sure the bolts are not fully threaded,most are 12mm dia.

Yes, you need BOLTS, not SETSCREWS. They must have a plain shank. In an ideal world, there is no shear loading on threads.

car.mad 12th December 2009 05:17 PM

thanks people a lot of useful information there :)

Cheers

Jake


All times are GMT +1. The time now is 09:25 AM.

Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.