Hi Paul and Guy,
I was the lister who suggested that a worn diff led to a broken axle on my
Midget. My thrust washers were totally missing and there was considerable
wear on the diff spider gears.
My solution was to find a good used diff which I took off of one of my
parts cars. I took the used diff into a shop and had the lash checked and
it was much better than the diff that came out of the car. I never
suggested that anyone try to repair a diff themselves.
Thanks,
Robert
_____________________
At 10:05 PM -0400 4/26/99, Paul A Asgeirsson wrote:
>Hi Guy,
>
>What started all this was a suggestion of a lister that the broken axle
>was due to too much play in the dif.
>
>I wasn't trying to introduce any confusion, but maybe I did. The only
>place you can fit shims in the dif. is to move either the pinion over to
>one side or the other, or to move the pinion forward or back. These are
>procedures best left to a shop with equipment to adjust or set up a new
>set of bearings in the dif and/or replace the ring gear and pinion.
>
>Now about the thrust washers. They are located behind the two sets of
>spider gears and they are of two types. One set is a flat phenolic
>washer that rarely wears down, on one set of gears that the axle shaft
>end fits into, and the other is a set of cup shaped copper washers behind
>the other two spider gears. They work against a rather small surface
>area and wear down somewhat more rapidly. Now when they wear down, the
>mating surfaces of the spider gears move out to the ends of the teeth,
>leaving them more vulnerable to breaking. Now here's a bit of info. I
>have replaced only one set in almost thirty years of driving LBC's and
>working on customers cars. Maybe it's just good luck.
>
>The only time you would normally access these pieces is when you need to
>remove a piece of stuck, broken axle shaft. Otherwise, it's no big deal
>you don't worry much about this.
>
>On cars that are raced with stock differentials and do a lot of one wheel
>spinning on take off, that's a different story. They will be prone to
>high rates of wear, but usually something else will go south (kaput!) so
>this whole assembly is tossed and another used one is installed.
>
>Paul
>
>PAsgeirsson@juno.com
>
>On Mon, 26 Apr 1999 22:09:28 +0100 "Guy"
><Guy@weller-lakes.freeserve.co.uk> writes:
>>PAul,
>>So this is different to fitting shims ??
>>I am now confused as your last message seemed to be saying leave well
>>alone
>>and not to consider tampering with the diff at all ?
>>
>>Now what ?
>>Guy
>>-----Original Message-----
>>From: Paul A Asgeirsson <pasgeirsson@juno.com>
>>To: toobmany@bigpond.com <toobmany@bigpond.com>
>>Cc: spridgets@autox.team.net <spridgets@autox.team.net>
>>Date: 26 April 1999 13:33
>>Subject: Re: Fw: Diffs.
>>
>>
>>>Your right, Peter. Always a good idea to have fresh thrust washers
>>under
>>>the spider gears and an "unworn" spider gear shaft. Saves broken
>>spiders
>>>by improving the tooth contact.
>>>
>>>Paul
>>>
>>>PAsgeirsson@juno.com
>>>
>>>On Mon, 26 Apr 1999 23:06:19 +1000 "Angela Hervey-Tennyson & Peter
>>>Westcott" <toobmany@bigpond.com> writes:
>>>>
>>>>True - but try reshimming the spider gears and while you're at it
>>>>replace
>>>>the shaft and lock pin.
>>>>
>>>>Peter Westcott
>>>>
>>>>----------
>>>>From: Paul A Asgeirsson <pasgeirsson@juno.com>
>>>>To: Guy@weller-lakes.freeserve.co.uk
>>>>Cc: spridgets@autox.team.net
>>>>Subject: Re: Fw: Diffs.
>>>>Date: Monday, 26 April 1999 8:17
>>>>
>>>>On Sun, 25 Apr 1999 18:59:01 +0100 "Guy"
>>>><Guy@weller-lakes.freeserve.co.uk> writes:
>>>>>
>>>>>Oh, Great List Knowledge,
>>>>>
>>>>>The diff on my 1500 has a fair amount of backlash, and this talk of
>>>>>broken
>>>>>halfshafts is beginning to get to me. I have had one break before.
>>>>>If worn diffs add to the risk .....
>>>>>Anyway, what sort of a job is it to rebuild a diff unit, or can I
>>at
>>>>>least
>>>>>reduce the backlash with shims ?
>>>>>
>>>>>Guy
>>>>
>>>> Hi All.
>>>>
>>>>The issue of excessive backlash on the pinion gear is something that
>>>>really can't be altered without a NEW ring gear and pinion. Assuming
>>>>there is no more than marginally excessive noise from the dif
>>>>assembly,
>>>>the backlash you got is what you are stuck with. Any attempt at
>>>>changing
>>>>it will result in change of heel, toe, flank and face contact on the
>>>>ring
>>>>gear resulting in horrible changes of sound levels from the rear
>>end.
>>>>The correct amount of back lash is etched on the side of the ring
>>gear
>>>>near the outer perimeter. This is for a new one, not one with 35
>>>>years
>>>>of use on it. So enjoy the ride and don't fuss about the backlash
>>>>very
>>>>much.
>>>>
>>>>Paul
>>>>
>>>>PAsgeirsson@juno.com
>>>>
>>>
>>>
>>
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