Uno Outter CV boot removal

[Carlyle]

I have a torn outer boot on the left side, I already have a new boot, I'm just not sure how to replace it. Is it necessary to remove the entire shaft just to replace the outer boot? Anyone have an easy method? Or just general guide lines?
Thanks.

 

[varesecrazy]

hi, if you new boot is a "solid" 1 piece boot then yes - normally you would undo the LARGE hub-nut,
disconnect the suspension strut from the hub, and swing the hub outward to disconnect it from the driveshaft,
then " depending on set-up,"
remove CV tripod /joint , or just stretch new boot over it,


the quicker solution is either a "split boot",
which you simply wrap around and bond / glue the edge seams together,



or there are VERY stretchy boots available too ( i've not used these,,!!)

Charlie

 

[sludgeguts]

It depends on the model.
I've had cars where the whole shaft has to come out of the gearbox & you have to dismantle the inner cv to slip the boot on for the outer.
BUT, I've also had cars where you simply open the boot to reveal the CV & it is held onto the splined shaft with a circlip.

I've never used the split boots OR the stretchy ones - but there are YT vids showing how easy the stretchy ones are to slip on. You also have to buy a cone (but I would have thought any decent spares shop would simply charge a refundable deposit?)

 

[alexGS]

On most Uno gearboxes (probably all except Uno Turbo), the inner driveshaft joint is the 'tripode' type, running inside the differential. It is held to the driveshaft by a simple circlip that you can see and remove with circlip pliers. This is after you remove the driveshaft from the differential - drain the gearbox oil first, otherwise it will come out when you remove the rubber boot.

I would leave the outer CV joint in the hub, unless the boot has been split for some time. If it has allowed most grease out and dirt in, you'll need to take apart and completely clean the CV joint, wiping away all grease with paper towels.

There is a different type of circlip (without holes for pliers) that holds the outer CV onto the driveshaft. This one is difficult to see, being buried in black grease. Sometimes there is no circlip and instead there is a 'jump ring' on the end of the shaft which locks inside the CV joint - you can't see it. This type of CV joint can be removed by knocking it off the shaft with a heavy hammer - difficult to do, particularly if the CV is still in the hub bearing.

Therefore, it is best to leave the outer CV attached to the driveshaft as the others have said - remove the inner tripode joint instead, to slide the outer CV boot over the shaft.

Some Uno inner joints (1372cc) have a boot with a bearing. Don't try to remove the bearing from the shaft - it is easy to damage it and difficult to get the bearing in the right place for re-installing. Instead, stretch the new rubber boot over the bearing.

Please also see the thread https://www.fiatforum.com/uno/22091-uno-60s-driveshaft-seals.html
-Alex

 

[Carlyle]

Thanks guys, this was more detailed than the stuff I found on google. Probably because those weren't for uno. anyway, thanks. I'll get to that this weekend.

 

[Carlyle]

Yes, problem, I can't get the joint out of the hub. No matter how I turn the steering wheel. The wheel is off, brake disk is off, how do I get the hub off? Or am I missing something, I can move it til about the middle of the hub and it stucks

 

[varesecrazy]

hi, if you new boot is a "solid" 1 piece boot then yes - normally you would undo the LARGE hub-nut,
disconnect the suspension strut from the hub, and swing the hub outward to disconnect it from the driveshaft,
Charlie

undo the 2 bolts clamping the suspension strut to the hub,
then the hub can flop around enough to get the driveshaft out,

Charlie

 

[Carlyle]

I had to remove the bolt that connects the steering rack and the knock it with a hammer to "shock" it. The shaft came out but the inner joint didn't come with it, I removed the bolts. Anyway, I got stuck again when it came to getting the outer joint off the shaft, help please? I'm done for the day though, I'll start over on friday well equipped. Lol. This round was just sloppy.

 

[multipete]

Remove/cut the outer cv boot off completely . Clean the grease from were the shaft goes in to the cv joint- look carefully and you will see 2 legs from the retaining circlip. Separate the legs apart and pull cv from shaft.

When you refit cv joint, put old nut on cv threads as not to damage threads when you knock it back on to the shaft...

 

[fmsonline]

Actually it is a common misconception that you need to remove the shaft on most Fiats. For most Unos you can just release the circlip that is on the CV joint and pull the shaft back enough to put a new boot on. However this is ONLY possible if the suspension is flat. So the car needs to be on a lift or over a pit. The moment you jack up the car the suspension will hang and push together and you will not be able to pull the shaft out.

Typically it took us at most 10 minutes to do a boot this way, even though the typical book time was 30 minutes. The trickiest part releasing the clip and be prepared to wipe of as much of the grease as you can till you can see it clearly. Also be sure to use a good quality grease and fill up the joint and the boot as much as possible else it wont take long for your CV joint to start knocking because of a lack of grease.

Just another expert tip from Franco

 

[Carlyle]

thanks everyone, turns out nothing goes just as it should. i couldn't get the circlip to open for the CV to slide off, my friend got it out by literally bending and pulling the circlip out around the circumference of the shaft with a pliers. :bang:

 

[Carlyle]

Are you sure the 2 legs are supposed to separate? the circlip pliers i got is basically a normal long nose with round points. they don't go outwards when i squeeze.