Hi all,

Can any one tell me if the IB5 box is a straight swap and what ratios are available etc.

It was pointed out to me that these could be a better starting point for a gearbox rebuild as many have much lower miles on them and have had a much easier life, can't turn the boost up on a puma. Had a look and there are a few good ones for sale.

Any thoughts

Rob,

 

dont know if this is of interest but late mg zr's where fitted with ford ib5 box and you can buy a brand new one for £100 on ebay.........

 

im not sure if the internals will be a straight swap into a bc gearbox, but with regards to ratio's there are loads available, 1.6 puma, 1.7 puma, 1.25 fiesta, zs fiesta, pas ka, non pas ka, sport ka, focus, they have all got different ratio's and final drive's, i wrote down what they all were at 1 point as i wanted a short ratio box.

they may not be as strong as an mtx75 or getrag 6 speed but ib5 box's have been proven to easily cope with well over 200bhp on numerous occasions now in turbo'd ka's and have survived daily driving, burn outs at the start of a quarter mile run, launch's, top speed runs, joey's old focus rs ka still ran an ib5 box with a quaife atb diff with 313bhp and 350lb/ft through it, that was running pas ka ratio's, did 60 in 5.5, 100 in 11.2, quarter mile in 13.8, and 157 top speed so was a good all rounder and never had a single problem with it.

 

Really? That is cheap!!! All you'd need then is to drop the LSD from the BC box in and your away!
As far as ratio's go, I'd drive a car with a IB5 box in a see what its like, or do a search and find the ratio's to compare to a S2..... haynes manual should have it in!
Pop your head in the nearest Halfords with your camera phone and your sorted!

You dont need to swap the internal into a BC box because the IB5's fit straight on!

 

http://cgi.ebay.co.uk/NEW-ROVER-25-M...item27ae86f1c4
have seen them cheaper but just an idea

 

ib5's bolt straight upto a cvh engine as the bell housing bolt pattern is the same, but the drive shafts dont fit because the joint's are different sizes and the mountings are different, they arent a straight fit but if you make mounts and sort out shafts then you can use 1, you may be able to use ib5 joints on rst shafts, thats something i never tried, but you also need to make sure you get an ib5 box with the right starter position to run on a cvh, you need a box from a duratec engined ka for the starter position to be in the right place for a cvh which is at the front at the bottom, endura engined ka's have got the starter at the back and zetec-s engines as in fiesta's and focus's have got the starter position at the front at the top, failing that you can have the bell housing modified as i'v had to have done on 1 of my gearbox's before.

not brilliant pictures and i know its on a zvh engine now but heres 1 of my ib5 box's with a modified bell housing to move the starter to the front to suite a cvh engine

 

I've got an Ib5 box in my orion turbo. its the changeover year box, starter still on the front. it was a brand new crate box, i can give you a number if want, the guy has some left. my driveshafts went straight in, but i did have my lsd fitted into it.

you'll need the changeover year release bearing, as both the CVH or ZETEC wont fit. the ratio's are ok. simply ok. cruising at 30mph in 3rd the revs are abit high for my liking but acceptable, same at 70mph in 5th. revs are 3300-3400 roughly. to me that seems abit high, but acceptable. 1st to 4th are great for acceleration but 5th seems to just die. you get very little acceleration from it, at approx 110 mph from 4th to 5th the car struggles to gain much more speed at all, let alone as quickly. having said that though it will accelerate right off the clock with the revs reaching about 5700 at the time, on an airfield at the time.

but the bearing casings are bigger than the BC box and it hasn't shown so much as a whine in 9 months now, i've had a few blasts in it i'd recommend one 100%. its an easy box to live with, but put 75w/90 oil in, it stops sticky gears when its cold. if you do alot of motorway driving though get some diesel gears put in it. with an LSD.

my 2p

 

When the bc box does start to die what happens? mine is struggling to get in gear when its cold, and sometimes when its warm like from 1st to 2nd it wont come out of 1st, then like 2nd to 3rd it holds in 2nd, once its warmed up properly its fine. is this the syncro's worn or the gears loss they teeth or something else?

 

Usually the layshaft bearing lets go on a BC box. You get a straight cut whine from the box when you lift off the power. I'm on BC number 13 now and this one having being built properly seems to be surviving

 

Hahaha no.13 lol i would have lost patience by then....

orionmojo, did you make the mounts up? and yes please could you PM me the guys number and price etc. Thanks very much!

Cheers lads

Rob,

 

Box bolts straight up mate. like i said, you need the changeover year to get the starter on the front, and changeover release bearing thats all. You'd have to chat to him about price though, i know him through my dad so got a "mates rates" price for it.


Power Gears
36 Bickford Rd
Birmingham
B6 7EE
Tel:0121-328 9114

 

Sorry to be a pleb.... but are the mounts the same?

Rob,

 

And sorry matey, did they fit your lsd?

 

yeah the mounts bolted straight up to mine (same as mk4 escy, not mk3) and thy fitted my lsd, but charged me for that obviously.

like i said they can do anything, if you wanted diesel ratio's in it, or custom ones they can do that.

 

Brilliant, I will give them a call this week!

And 10th racer i didn't say thank you for posting your pictures

Rob,

 

I have spoken to these guys and they can rebuild the bc boxes too but the cost is nearly the same as CTS except they don't use a quaife diff but a nissan type if i remember correctly.

 

i dont know mate.they build every type of manual gearbox you can imagine. they even do the HGV stuff, with split gears etc. they fitted my lsd out of my BC box which was knackered into an IB5.

 

Hi everybody, I've got a simple stupid question for you
I'm about to change the silly stupid 1.4 diesel engine of my fiesta with a decent 2.0 st one, the thing is that the original gearbox of the crushed st that I'm about to buy got broken so i was wondering if the same IB5 that I've got with the diesel will fit and work properly? I was also thinking about changing the internals from the broken one to mine since only the outer box is damaged. Any suggestions?

 

Can i ask what the changeover year is? what year ib5 would i need for the starter to be at the front of the box? cheers

 

I've had no luck with ib5 boxs, done 3 in my puma powered zetec s , the diffs fly out the cassings (ill get some pictures up). Aparently fiting an lsd helps with this though ?

 

Hi, i had four bc boxes in my escort before doing an mtx75 conversion, one of them lost 1st gear, one was very worn diff bearings, the other two the first motion shaft bearing went tits up (they are a very small bearing for the loads involved, and you cant increase the diameter of them as they come up against the other shaft) Im just curious to know how much ford changed the box to make the ib5, bigger first motion shaft bearings? bigger diff bearings? Does anyone know what CTS do to make the bc box uprated, its always puzzled me, as the only thing i can think of is they put in a wider 1st motion shaft bearing?

 

I think the diff bearings are bigger and the case is much stiffer which means side loadings on bearings is smaller, pretty sure most cts boxes are ib5 based? im sure there are other differences but apparently its a pretty decent box for the usual 200 brake. The mtx75 is still the daddy tho who did your drive shafts chaffe?

Rob,

 

I made the shafts on my mtx75 at work on a lathe and milling machine , did a clutch on a w reg fiesta last night, it has an ib5, looks quite similar to the bc box, and it had the distinctive whine in 1st gear lol! its only done 63k miles. You must have to change the diff bearings if you put an RST LSD into an ib5 then? the casings are def more webbed and look stronger, but its the 1st motion shaft bearing that was always the prob IMO.

 

Orionmojo....what ib5 do you have in yours? As In what car is it meant for (zetec s, ka sport etc) thanks