Search found 738 matches

by ndevans
Tue Oct 15, 2019 7:33 pm
Forum: Mechanical
Topic: Rear hub gasket
Replies: 18
Views: 362

Re: Rear hub gasket

There are two things to consider:- 1. That the bearing is fully home in the hub. 2. That the bearing is fully home on the axle tube. The hub/bearing assy should be installed on the axle tube and the nut fitted and done up fully tight (or as far as it can go) before removing the nut and fitting the ...
by ndevans
Mon Oct 14, 2019 11:39 pm
Forum: Mechanical
Topic: Rear hub gasket
Replies: 18
Views: 362

Re: Rear hub gasket

Seems like the most appropriate thread to post this. Having got the bearings back in the hub, secured with a bit of bearing lock, I've now got the hub back on the axle casing. The BMC manual is a little vague on this subject, however, and I'm not sure how far in the hub should go. I started by tappi...
by ndevans
Sat Oct 12, 2019 5:35 pm
Forum: Off-Topic
Topic: Currently drinking.....
Replies: 85
Views: 3222

Re: Currently drinking.....

Redbook Ale is another nice one.

Guinness Foreign Extra Stout for me tonight.

Then I need to get my backside in gear and do some homebrew, in time for Xmas.

Cheers N
by ndevans
Sat Oct 12, 2019 7:30 am
Forum: Off-Topic
Topic: Currently drinking.....
Replies: 85
Views: 3222

Re: Currently drinking.....

The Brooklyn Brewery beers are nice.
by ndevans
Fri Oct 11, 2019 10:53 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Good evenings work tonight. I cleaned the 4.22 diff cage, and fitted the sun and planet wheels from the 3.9. I also fitted the new oil seal. IMG_20191011_220311~2.jpg I used two new 0.035" thrust washers and a new shaft with the sun and planet wheels from the 3.9. The sun wheels have the fibre washe...
by ndevans
Tue Oct 08, 2019 6:45 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Quick update-been to three machine shops today, all reckon that machining the diff cage can only really be done with the correct tool, i.e. the milling or grinding wheel that was used to make it with. That or shape a spherical or dish grinding wheel to match the thrust washers. It was suggested that...
by ndevans
Tue Oct 08, 2019 2:12 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

It'll be stamped ATA or BTA on the rim of the crown wheel. I think the outer casings are all ATA, but the cage & crown wheel assembly is either ATA or BTA.

I think, but not positive, that the BTA carrier was fitted to Midgets and Wolseleys.

Cheers N
by ndevans
Tue Oct 08, 2019 9:56 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Are the sun and planet wheels interchangeable? They look it, and the ones off the 3.9 are in better nick.

Cheers N
by ndevans
Tue Oct 08, 2019 12:07 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Not sure, might just be wear between the pinion & crown wheel. The splines on the sun wheels, which are what the half shafts locate in, look ok. Some of the play might be the wheel bearings, which were loose in the hubs. Unfortunately, the diff cage on the 4.22 is an ATA type, on the 3.9 it's a BTA....
by ndevans
Mon Oct 07, 2019 11:06 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Having ummed and ahhed about it over the weekend, I decided tonight to get the diff cage on my 4.22:1 apart. I was worried that it'd be as bad, if not worse, than the 3.9, but happily it appears not! The planet wheels had about 2mm lateral play along the shaft, which didn't bode well, and I was expe...
by ndevans
Sat Oct 05, 2019 5:34 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

The diff I am working on is my spare, it's a 3.9:1. The 4.22:1 on the car is worn, and has probably had no attention since it was built, other than oil changes. I don't expect it to be much better when it gets stripped.

Cheers N
by ndevans
Sat Oct 05, 2019 1:09 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Ok, here's the plan. I'm going to chat to my local friendly machine shop, who re-bored my engine. I'll take the diff carrier and planet wheels down there, and explain in person what I want. I'm going to ask him to machine or grind out the ridge around the centre hole, and the outer step, to the same...
by ndevans
Fri Oct 04, 2019 3:09 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Ha ha, that it will!

I haven't seen any dimensions or clearances for the sun/planet wheels. Do you know of any? For example, what should be the distance between the thrust washer surfaces on either side of the cage? What free play, if any, should the planet wheels have?

Cheers N
by ndevans
Fri Oct 04, 2019 1:21 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

I did wonder whether it would be possible to fill the wear grove with weld! But surely I'd still need a machinist to clean up and smooth the weld?

Cheers N
by ndevans
Fri Oct 04, 2019 9:59 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Ok thanks gents.

So, if I just fit new 0.035" thrust washers, will it be ok?
What if I was to try to turn down a thrust washer so that it fits in the recess that's been worn? Could that work?
by ndevans
Thu Oct 03, 2019 10:57 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

A few photos this evening of the innards of the diff cage. IMG_20191003_213329~2.jpg IMG_20191003_213507~2.jpg IMG_20191003_213629~2.jpg IMG_20191003_213715~2.jpg IMG_20191003_213737~2.jpg The wear in the diff cage where the thrust washer has worn away to a ring is clearly visible. Can I have this m...
by ndevans
Thu Oct 03, 2019 7:24 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

Thanks. I've never done a diff before either, so it's a steep learning curve for me. I'll be doing some more on the diff itself next week.
by ndevans
Thu Oct 03, 2019 12:32 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 80
Views: 1610

Re: Differential overhaul

While I've got the back axle off the car and in bits, I've taken the opportunity to do a bit of freshening up. Here are the rear brake backplates cleaned, painted & reassembled, ready for fitting to the also cleaned & painted back axle.
IMG_20191003_000802~2.jpg
IMG_20191003_000802~2.jpg (891.54 KiB) Viewed 231 times
by ndevans
Mon Sep 30, 2019 10:13 am
Forum: General Discussion
Topic: Axle tramp
Replies: 90
Views: 2745

Re: Axle tramp

I should add that I have the thin paper gaskets from ESM. They add a little under 0.1mm to the dial indicator.
by ndevans
Mon Sep 30, 2019 7:03 am
Forum: Mechanical
Topic: Rear hub gasket
Replies: 18
Views: 362

Re: Rear hub gasket

Thanks Phil, very instructive!