I have replaced the gearbox in my 84 Uno with one from an Uno from 87 on. The bottom linkage type.

I have a noise on acceleration in 1-4 but not in 5th. The noise goes away when I decelerate, I am assuming a noisy/failing input shaft bearing.
Am I right?

I assume the gearbox had 200,000km on it, that was what was on the speedo when the car went on fire in the engine bay!!

The gearbox did not have much oil in it when I took it out, I found splits in both gearbox boots later when I went to put the Driveshafts in!

I am not so keen to take the gearbox out again to replace the bearings, but maybe I will have to!

rawill said:

I have replaced the gearbox in my 84 Uno with one from an Uno from 87 on. The bottom linkage type.

I have a noise on acceleration in 1-4 but not in 5th. The noise goes away when I decelerate, I am assuming a noisy/failing input shaft bearing.
Am I right?

Click to expand...

Yes, I think you're right.

They do go on for a while in that condition, but then one day it throws oil all over the clutch and it judders like crazy when the bearing finally collapses and allows the input shaft to waggle around.

Bit of a project to change that bearing (a 'need a spare car for a week' type of project) but I'm sure you're up to the task. Are the synchros OK?

-Alex

Yes synchros are good, and this one did not have any chips from the gears come out when I drained the oil, like the one I replaced this one with!!

rawill said:

Yes synchros are good, and this one did not have any chips from the gears come out when I drained the oil, like the one I replaced this one with!!

Click to expand...

Probably worth changing the bearing then

You might have to resort to brute force (shattering the bearing by hitting it with a sledgehammer) to get the old bearing off, since there probably isn't space to get the legs of a puller behind it. Might have to split the inner race with a grinding wheel.

Then, to fit the new bearing, a pleasant way is to leave the gearbox input shaft in your freezer for a few hours. Leave the new bearing sitting in the sun. The bearing will then go on easily...

Most gearbox designs require the casing off and the shafts out, but a few designs allow you to remove the bearing once you have the seal carrier/clutch release bearing support off. Worth a try perhaps - you'll know because after the seal carrier is unbolted, you'll either see the bearing outer race ready to extract, or you won't (then you'll have to take the gearbox apart).

-Alex