Drum's to Disc's 131

[106usj]

What all do i need from the Uno Turbo rear end to convert the 131 to rear disc brake set up.
List please if possible so i know i get all what i want.
any info? Thanks 106

[sid131]

why not change the Axel for something thats not made of chocolate & would give you the options of lsd & possibly disc brakes? English axle or toyota rwd axle bothj these have lots of options for lsd & disc brake set ups, plenty to choose from!

[106usj]

Yeath you are probably right !!

[djape1977]

where are you located in this blue world of ours 106usj?

[chris131]

Hi, my 131 has disc brakes on the rear from a fiat 132. Make sure whatever route you go that you can get a handbrake cable to suit. With my car the 132 handbrake cable was too long, a fiat 124 one was too short, 131 cable was the right length but had the wrong end to suit the calipers. I ended up having to use a lancia handbrake cable, I think from a beta, and even it needed modification but was the best fit I could get.

I have new 132 rear calipers, discs and pads if your interested in them for your car.

[106usj]

Located in bonnie Scotland. djape
I was just looking for info on this subject as i am spending my 131 money on other things just now,but i want to do some home work and gain knowledge on suitable upgraded rear brakes or as Sid said replacing the existing axle with an improved set up for when the time comes.
I dont have much knowledge on what axles work and are best to use and how much work is involved.
The Toyota RWD axle or English axle ? for example, from which models ?

[CkRacing]

english axle is from a rwd escort & toyota not sure as a lot of corollas & celicas are rwd also, sure as sid131 has already did the toyota conversion he would be the man to talk to

[106usj]

So a mark 2 Escort axle would work then ?

[djape1977]

i asked for you location in order to know what cars are locally available in your part of the world.

rear brakes from uno turbo would work on 131. you need to get calipers, disc and handbrake cable. only thing that you'd still need and you can't use from uno would be anchor plate for rear callipers.

easyest swap would be if you found a rear axle from mk1 or mk2 fiat 132 1600 or 1800, fiat 125, 124 spider, polish 125p or FSO polonez. you'd need to pull everything out, rear calippers, discs, halfshafts with wheel bearings and anchor plates.

[106usj]

Why is the 131 axle so poor and known as (chocolate diff) and the 132 axle seems to be ok.
Why did Fiat put a sh*t diff on the 131 and a decent diff on the 132 ??

[Thotos]

Probably a cost saving exercise? But most likely it's because the 131 was originally a car with 1.3 and 1.6 OHV engines without a lot of power or torque. All was fine until they fitted the 2 litre twin cam and obviously nobody thought of upgrading the diff or the brakes! As for rear discs, the standard 131 fronts are a straight fit onto the back. That's what I have on my car. I have VW golf callipers but I think Fiat Croma/Lancia Thema/Alfa 164 callipers will also do. A lot of cars with rear discs have separate drums for the handbrake so if you have only discs at the back you'll need callipers with a handbrake mechanism.   

[djape1977]

Why is the 131 axle so poor and known as (chocolate diff) and the 132 axle seems to be ok.
Why did Fiat put a sh*t diff on the 131 and a decent diff on the 132 ??

because 131 was mid range car produced in 2,5 milllion units and 132 was top of the range expensive car produced in around 300.000 units.
mk1 132 had the same diff as 131 but in mk2 and mk3 it was replaced by ZF designed unit since mk1 diff was found to be less than perfect

[106usj]

Intresting thanks for the info Theo/djape, back to the home work for me !!

[Thotos]

Here's what a 131 front disc fitted to the rear of a 131 looks like  (ignore the hub extension which was fitted for connection to a dyno pack)

[mirafiori76]

Diffs of 131's aren't that bad. I am driving 131 Racings since 1987 and have never had a noisy one. It's all in changing the oil regularly. And to use the right type of oil. Make sure you use type 90 oil.