- This topic has 24 replies, 5 voices, and was last updated by Scruffy.
July 21, 2010 at 7:07 pm #12516
Hi all, Does any one know the correct length of the crush spacer. I have two new ones of different lengths.July 22, 2010 at 6:18 am #23956July 22, 2010 at 9:20 am #23957
The new one i have here is also 49mm, but its a repro not a genuine Ford one.
Do I detect you trying to rebuild your diff? did it whine or rumble?July 22, 2010 at 10:26 am #23958
Hi thanks for that looks like 49 mm. the reason I ask is-
Looks like I have big issues with my diff when travelling there is a rumble/ heavy vibration through seats.With rear jacked up on stands clunks and whole axle lifts when it is driven top gear. :cry:
Any advice pleaseJuly 22, 2010 at 11:08 am #23959
Possibly bearings or worn out of adjustment. How many miles has it done? has it got oil in it.
Thing is how long has it been run like that, as it may have caused damge to crown and pinion, if it isnt already damaged.
Usually my rule of thumb with diffs is; If it whines, then its knackered, the crownwheel and pinion have probably worn through the case hardening, and basically its beyond the point of any usefulness in a road going car.
If it rumbles then it may be bearings and/or needs resetting with new shims and preload. Not an easy job to get right from a DIY point of view.
The obvious thing here in both cases, is to check the halfshaft bearings first as these are cheaper and easier to replace, but can often be over looked people thinking its the diff making the noise when in fact it isn’t. Been there got the t shirt!!July 22, 2010 at 12:04 pm #23960July 22, 2010 at 2:20 pm #23961July 22, 2010 at 3:34 pm #23962
Hi this is the findings now the diff is removed, half shaft bearings ok, very little end float between crown wheel and pinion, planet gears have bit of slogger. oil clean no pickup etcJuly 22, 2010 at 5:32 pm #23964
Today I had a problem with my diff. The pinion oil seal is worn. I have a new one.
I’ve read that http://www.fordanglia105eownersclub.co.uk/phpBB/viewtopic.php?t=1350
and I would like to know if it is a requierement to change the crush spacer or if I let mine in place ?
Thank you for your answer,
RémyJuly 22, 2010 at 6:26 pm #23965
Ken and I disagree on this, but I leave them in place. Mark the nut and pinion before undoing, and make sure you retighten the nut to EXACTLY the same place though.July 22, 2010 at 6:56 pm #23970
When you wrote EXACTLY you don’t go 1/8 or 1/4 turn after the mark, that’s right ?
RémyJuly 22, 2010 at 7:31 pm #23971
I don’t. If you do, you will alter the pre-load by crushing the spacer just very slightly more.July 23, 2010 at 1:57 am #23972
Well it just so happens I’ve done the very thing today whilst my diff was out. I counted the nut off and counted the nut back on. I’d made a centre dot mark on the shaft and nut to ensure accuracy. Guess what, there was a fraction of play in the pinion. I seem to recall this is why I said about going just that fraction further on re tightening. Remember this was probably set at the factory, the whole thing has done an unknown number of miles since then, ie the bearings will be worn. So going just that tiny fraction more, just takes up that wear- which is what I did today. probably about 5 degrees more, is what it was roughtly.
If it all worries you that much, get a spring balance and see what your preload is before you dismantle it, then reset it to the same afterwards.
I’ve never had a diff go bang through doing it my way, and certainly never made them worse!!July 23, 2010 at 6:30 am #23973
Thank you Ken.
another enquire : How do you use your spring balance ?
RémyJuly 23, 2010 at 7:58 am #23976
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