the f16 wide from the cav cdi and a few otherr 20ne engined cars has the 3.94 FD
the f16 from a daewoo (rare to find tho) has a 4.12 FD

 

Intresting. But would it fit into a vaux box?

Next question would be does anyone have a f16 W box for sale with this 3.94 fd in it then.
If so then i wanna buy it! lol

cheers

chris

 

a daewoo is an astra. same shell, same engine, same everything bar the lights and badge.
i know a few who run the 4.12 fd in their rally cars

 

Ok which daewoo would this be(not up on these beasts)
As im in desperate need of this final drive,!!!!!!!!!

cheers

 

desperate eeeyyyy
i have a f16w in the garage...yours for £50 lmao

it will be any daewoo with a 20ne lump innit, box will say f16

 

If that f16 has the 3.94 in it i will intrested.!

But its gotta be the 3.94


cheers

Chris

 

yep, but dont be daft you could pick one up for a tenner cos you dont need the gearset it can be in any condition pretty much
there must be loads of cav and astra cdi's in the scrappys...in fact i bet you could buy the car for 100 and sell the bits for 200 lmao

 

Lol. M8 id buy the box as longs its 3.94
This is how bad things am. lol.

Scrappy rubbish round here. half the spares palces dont even understand a final drive.!
and the peeps who are supposed to know cant help! lmao

soooo
Yes ill buy the box as longs u checked to make sure the fd is 3.9

 

i used it for a year LOL yes it is the 3.94, which is why i kept it.
its near chester if you seriously cant find one (which should be interesting when i come to get one for a new f20, but i cant be bothered yet)

 

the daewoo is the older nexia, you cant miss it because it looks like a mk2 astra lmao

the 3.94 final drive was also fitted to the F16 close ratio in the sporty 1.8 models, like 1.8 gte, sri etc.

 

3.55
3.7
3.9
4.17

all fit in the F16/F20 boxes.

I changed my Astra from 3.55 to 3.9

Talk to http://www.wtc.co.uk/

Be careful about gearing down too far. I looked into this. It will make the car quicker 20-60, for example, but it will make it slower over high speed acceleration increments.

 

i dont understand this thread, anyone care to explain what final drive is and where about it is in the gearbox(pic) what is the main advantage of 3.94?

 

 

final drive does what it says on the tin, its the ratio of gear between the end of the gearset main drive and the crown wheel of the differential. the "final..drive" literally is the final drive before power goes to the wheels.

the bigger the number the more mechanical advantage the gearbox has on the diff. so basically bigger number = more acceleration, but as tom said its a trade off for acceleration at higher car speeds.

 

oh ic (i think) so all you have to change is the diff and the end cog off the gear train(dunno what its called) and will make ur car accelerate quicker? yeah how do u get the cog off the end of the gear train?

also if its long ratio, will it say l on digits 6-7?

 

Exactly.
You have a set of gears. And then a final drive.

The engine revs are a lot higher than the wheel revs. So the final drive divides the speed down a bit more. In doing so it gives you
more torque at the wheels.

If you lower the final drive (increae the number. For example, going from 3.55 to 3.9 is a change of 10%. So the wheels spin 10% slower than they used to for a given engine rpm. That's the same as the engine spins 10% more quickly than before for the the same road speed.

So you hit the rev limiter at a 10% lower road speed in each gear, but you have 10% more torque at the wheels. In my case this made the car feel better in the 10-60mph area. It will make the car slower, say from 100-120 because you "use up the gears more quickly".

 

im with you now tom.. cheers.. might play with the motor this weekend then, im running the v6 with an f18 from a cav and have to keep the revs high to pull away nicely, the gears seem crap, gonna go have a look now and see if the box is wide or long etc, hopefully can get tha f16cr to fit in the box?

 

well yes and no, dont have to swap the whole diff, because the crown wheel unbolts from the diff. the "end cog" is called the pinion.

heres two diferentials, left one is a quaiffe slipper with no crown wheel, right is standard diff with crownwheel.

 

can you change the crown wheel on the diff by just taking the bottom inspection plate off? wouldnt thinmk you could.. and the big nut that secures the diff in is a biatch to get out,.... what do you use to remove the nut? how much is the tool

 

if you mean this nut, you can just tap it round on one of the castleations with a suitable drift.

 

im running the v6 with an f18 from a cav

Quite probably got a 3.7 final drive in it.

 

if you mean this nut, you can just tap it round on one of the castleations with a suitable drift.

lmao lmao lmao
odders you amaze me where u get all these pics from..

yeah thats the nut i was on about. last time i took it out, i tried that method, but just ended up breaking the teeth off one bye one.

Quite probably got a 3.7 final drive in it.

the gear raio's really are shitzer tho.. 1st is exellent tho, good from bout 30mph

 

So does changing the final only effect high accellaration or does it effect max top speed aswell.

No good at this stuff (reason for dumb arse question)

 

yeah it will reduced top speed

 

It will increase torque at the wheels
It will improve acceleration at low- mid speeds
It will reduce acceleration at high speeds
It can limit top speed, depending on rev limiter etc

Mine is now limited to 129mph, whereas it could go to 138 before.