Search found 701 matches

by ndevans
Sat Sep 14, 2019 7:33 am
Forum: Mechanical
Topic: Differential overhaul
Replies: 4
Views: 162

Re: Differential overhaul

:lol: :lol:

Hopefully not too epic. I think at least one pinion need replacing, but apart from that I'm hoping it'll just be a good clean, and the oil seal that needs replacing.
by ndevans
Fri Sep 13, 2019 11:24 pm
Forum: Mechanical
Topic: Differential overhaul
Replies: 4
Views: 162

Differential overhaul

As I'm going to strip and overhaul my spare 3.9:1 diff, which is going to replace my worn 4.22:1 diff, I thought I'd start a thread for it. You never know, someone else might find my learning journey useful at some point. I'm sure someone will have posted similar before, but there's no harm in addin...
by ndevans
Fri Sep 13, 2019 11:10 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

As I'm now going to overhaul my 3.9:1 diff and fit it in place of the 4.22:1, I'm going to start a new thread covering the process, rather than clog this one up.
Cheers N
by ndevans
Fri Sep 13, 2019 6:44 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

Thanks Phil. The manual kind of explains, but leaves tantalising gaps in knowledge!
by ndevans
Fri Sep 13, 2019 3:48 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

OK, I’ve now watched the video on p1 all the way through. I have a couple more questions  1-If a solid spacer is fitted, instead of a crush washer, does the flange nut still need torqueing to 140lbft? Does the pre-load still need to be measured? 2-What if the pre-load is reached when the torque is ...
by ndevans
Thu Sep 12, 2019 11:57 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

Ok thanks. I was under the impression that you have to reset the pre-load when replacing the oil seal. Do you have to reset the pre-load when replacing the differential bearings? Do you have to go through all the procedure detailed in the BMC workshop manual, involving the dual test indicator? Cheer...
by ndevans
Thu Sep 12, 2019 10:52 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

Ok. Is there no way of telling without dismantling? And should I still test the pre-load as i torque it up, to make sure it doesn't exceed the current pre-load?
by ndevans
Thu Sep 12, 2019 10:42 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

So.... Is the crush washer not automatically fitted?
What about the pre-load? The pinion moves under the weight of the angle alone-doesn't that mean the pre-load is too low?
by ndevans
Thu Sep 12, 2019 10:32 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

Ok, here is my home made in-lb torque tester:- IMG_20190912_215905~2.jpg It's a bit Heath Robinson, but it should do. It's a piece of aluminium angle, with two holes drilled for the diff flange bolts. I have measured 12" from the diff centre of rotation, and a 1lb (or 454g if you prefer to use sensi...
by ndevans
Thu Sep 12, 2019 2:12 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

Worn half shaft splines has occurred to me, and I'll have to remove them before I remove the diff anyway. I've had them out in the last year or two, and I don't remember them looking worn. I feel like I should replace the oil seal on the spare diff, as it's an unknown quantity, but maybe I'll put it...
by ndevans
Thu Sep 12, 2019 2:09 pm
Forum: Mechanical
Topic: Diff Identification
Replies: 110
Views: 3388

Re: Diff Identification

I'm about to swap a 4.22:1 diff for a 3.9, as well. I've no idea whether the oil seal is good or not, but assuming I have to change it, and I use a new crush washer.....what if I reach the 11-13 in-lb setting before the nut is torqued to 140 ft-lb?
by ndevans
Thu Sep 12, 2019 10:31 am
Forum: Mechanical
Topic: Pinion seal replacement Morris 1000
Replies: 4
Views: 168

Re: Pinion seal replacement Morris 1000

Do you mean the diff pinion seal?
by ndevans
Thu Sep 12, 2019 7:23 am
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

I think I know what I'm going to be doing on Saturday!

Can anyone tell me what size the retaining nut on the diff plane is, please? The large central one, not the cardan shaft bolts. I have to remove it because the metal dust shield is damaged and needs beating back into shape.

Cheers N
by ndevans
Wed Sep 11, 2019 11:02 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

The bracket is actually a rear seat belt anchor!
by ndevans
Wed Sep 11, 2019 10:22 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

Got the cardan shaft off today, and repeated Monday's test. I ran the engine in all the gears, and the was no knocking, clunking noise at any speed. Turning the rear wheels by hand, I could hear and feel the clunking. So I'm thinking the problem lies in the diff &+ halfshafts. I have a spare diff, w...
by ndevans
Tue Sep 10, 2019 9:50 am
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

Thanks for the tip. The rear brakes are standard drums, and I managed, after a lot of time and a few new swear words, to get the beehive springs fitted as well. I will check, but I think chattering shoes is unlikely. The noise appears to be more central anyway, doesn't seem to be coming from the whe...
by ndevans
Tue Sep 10, 2019 7:07 am
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

I'm thinking the diff and halfshafts have to come out.
Is it possible to move the car without the halfshafts? (Obviously not under its own power!)
by ndevans
Mon Sep 09, 2019 11:28 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

What the video doesn't convey is that the clunking can be felt when driving the car. It makes the car shudder, it's almost like an undamped vibration in the drivetrain. Something like that can't just be incorrectly fitted brake shoes, surely?
by ndevans
Mon Sep 09, 2019 10:33 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

I think you were spot on. I raised the car this evening, and with 2 axle stands under rear axle, ran the engine with the gearbox in 1st, 2nd, 3rd & 4th. The noise I am hearing when driving was most apparent in 3rd & 4th again, and it clearly seems to be coming from the rear axle. In the videos, you ...
by ndevans
Mon Sep 09, 2019 3:39 pm
Forum: General Discussion
Topic: Axle tramp
Replies: 77
Views: 2039

Re: Axle tramp

Hadn't thought of that, there's an idea. Thanks.