basically i have blown second gear up in my gear box have atb diff in it so am gonna rebuild it now i have taken it apart and need to replace second gear cog and the late shaft anyone know how much these two parts will cost me and where to get them.I can get an xr3i box for fifty quid and was gonna buy it and take the two parts i need out of that as it is a cheap option but dont know if it will fit im pretty shore it will as all the bearings ect in my box are fine anyone done this or know if it can be done any help appreciated thanks

 

I should think it would fit but you'd have different ratio's?

 

Ok, as said above, not that easy. You will need to know the ratios you are going to need. What I suggest is you count all the teeth on the gears and layshaft ( keep the numbers as pairs of gears ) then get back to us. I have a mountain of stuff so should have something kicking around.

 

IME The ATB is too harsh for a BC box albeit a very nice diff, a viscous unit is a little more suited to such a weak box.
I sold mine and bought a Puma Racing LSD and although not quite as good as the ATB I wont be changing box's every 10mins lol
Something to consider when you repair yours...

 

hi thanks know i have counted the teeth on the laye shaft they are
from imput splines down
1---12 teeth
2---13 teeth
3---26 teeth(this is the gear that is stipped all its teeth)
4---34 teeth
5---41 teeth
and the gear witch i think is second gear as thats the one i lost has 53 teeth i was not to shore when you said (keep the numbers as pairs of gears )so hope the information i have given u is what u need as this is the first time i have ever got into geartboxs thanks

 

Ok thats good, we could do with the numbers on the othe gears as well to make life easy, sorry.

Although we now know the ratio for 2nd is 53 divided by 26= 2.03:1

 

ok it no probs will do it in my lunch brake at one and get back to u thanks

 

Yep, 2nd is the one with 53 / 26. The gear with 13 is reverse, so that needs discounting, so:

1---12 teeth
2---26 teeth(this is the gear that is stipped all its teeth)
3---34 teeth
4---41 teeth

 

ok here are the rest from the top
1---17
2---43
3---47
4---26
5---45
6---39
that is all the cogs apart from 5th thanks

 

Is 1 the pinion on the end of the shaft ?

And have you counted the teeth on the 1st / 2nd syncro? Just trying to fathom the numbers

 

yes no1 is pinion sorry so i'll start again
first gear ---43 teeth
second gear---53 teeth
third gear---45 teeth
forth---39 teeth
sorry got a bit confused hope thats better thanks

 

i have a stripped rst gearbox at work, if you need any parts. also i have a for sale thread, the diff has sold but i still have the gears and layshaft.

https://passionford.com/forum/ford-r...box-parts.html

 

OK, so by my reckoning:

1st: 3.58
2nd: 2.03
3rd: 1.32
4th: 1.05

Whats the box out of? Will have a look and see what I have

 

its out of an 1988 escort rs turbo series 2 thanks

 

Stock RST ratio's are as follows...

1st 3.15
2nd 1.91
3rd 1.28
4th 0.95
5th 0.76
FD 3.82

 

i bought this box about three years ago from the gearbox man or bernie boxs i think. so by the look of what your saying it has not got the right gears in it or i have not calculated something write i dont know about these gear raitos so looking at what i ve got is it bad or good i paid 1000 pound for this cash with the atb diff in it as i blew 3 gearboxs in 6 months and up till know it has been great untill i run it on my 1800 high comp lump and then it blew second gear had the car on the rollers and it made 212bhp and 260flb at 10psi on a standard t3 and got a xr2 box in at the minit and its already makin noise so want to get a good box in asap

 

If its a Bernie box then it will have whatever ratio's specified at the time of building it, if you asked for stock RST ones then that it what you would of got I would think
The CTS box's are no different to a normal BC box at the end of the day it's only the bearings that are bigger, everything else is still just as weak, unless you got the Stage 2+ which is shot peened of course, but that would be around £1500.

 

God knows what they are out of, the only decent ratio is 2nd

 

thats good power from the 1800 mate at only 10 psi

 

it does go well no lag and just pulls like a train spec is
1800 hich comp bottem end
stage 3 rst head
std t3 turbo
full front mount intercooler
bajo chip
xr3i mfi inletmanifold
285t2 cam veirner timed
would put up my power graph but dont know how but its in the next performance or fast ford at a rolling road shoot out

 

ill keep an eye out mate

 

the gears dont look shotpeened and i did do a cash deal with him thought i had bought the stage 2 not the stage2+ any way thanks for your imput

 

Just out of interest whats the teeth count on 5th ( both gears)?

 

Again,wicked torque figures! you don't see that kind of gap between bhp and torque normally.Well done.Not suprised you killed a gear lol

 

thanks set up my self and was spot on fueling and timing on rr was well happy didnt expect that just love the way it drives

 

i have counted both gears
34 teeth and 45 teeth thanks

 

Thats good it's a 0.76 what the RS Turbo should be