got an f plate 2wd saph and want to convert to 4x4 am sorten on engine and front end but do i need to do anything to rear beam diff or rear suspension set up

 

only make sure that the rear diff runs an appropriate ratio for the front diff.

you also need to modify the floorpan to take the transfer box

 

if your sorted with the front end stuff just get the rear diff from the same car. the 2wd runs 3.9 and the 4wd runs 3.6. otherwise you'll need a chain step off that goes in the transfer box.

 

cheers lads

 

This is not true mate, the 2wd cossie runs the same ratio diff 3.64 as the 4x4 rear diff which is also 3.64! the only difference is the sizes the 2 wd diff is 7.5" and the 4x4 is 7"!!

Nick

 

which diff would be best mate

 

Using the 2 wd rear diff would be best as it is just that wee bit stronger!

Nick

 

Will it go straight onto a 4x4?

 

so i can stay with 2wd diff and will 4x4 gearbox need to use which prop shaft 2 or 4x4 one

 

You will have to use the prop shaft forward of the 4 x 4 as they are compatible!

Nick

 

sorry to steal the post but does any one have any photos of wich part need welding or cutting or makeing to turn a 4x4 in to 2wd as i was told will need to make a braket for the gearbox to bolt up to the body or is this wrong thanks

 

i would recomend converting to vented rear brake set-up like on a 4x4 as you won't have the engine braking the rear wheels only, so they wil get that bit hotter

 

abdr500,

this pic shows the 2wd gearbox x-member as fitted to a 4x4 floorpan. where the x-member should bolt to the floor there is a space for the transfer box



to make it fit, bolt a length of 50mm box section onto the one mounting place that extends forward to make a mounting place for the x-member.

 

umm, im just converting my 4x4 saph to 2wd this weekend and came accross this gearbox mount problem, do you have to weld the box section to the floor pan?

 

i bolted it up using the original mounting bolts but the nuts are a bit fiddly to get to inside the box section. it was so long ago now though that i can't remember what i did exactly. i think i cut the box at an angle at that end.