Hi Glen,
The clunk may be only from worn thrust washer in the dif. That's a
pretty easy fix. When they wear, the diferential gears move away from
each other, and the result is more play. This is unrelated to the pinion
and crown wheel setup.
Paul
PAsgeirsson@juno.com
On Thu, 27 Jan 2000 12:56:50 -0800 "Glen Byrns" <grbyrns@ucdavis.edu>
writes:
>Wow! I got 5 good answers to this question in the hour it took me to
>go home
>and eat lunch. This group is incredible.
>
>Thanks to all. I admit I'm a differential dummy. I've only swapped
>them
>over the years, never cracked one open. It sounds like the best bet
>is to
>go with a 3.9 if I can locate one. The free rotation of the wheel
>before
>the drive shaft begins turning is not what bothers me, its the
>noticeable
>clunk on start up from a stop. Yes, I very carefully checked both
>U-joints
>first before casting the hairy eyeball on the differential. If the
>clunk is
>an easily diagnosed and cheaply repaired problem, then my inclination
>is to
>fix it and make no change in the rear-end ratio until I switch over to
>a
>5sp.
>
>
>
> Regards,
>Glen
>Byrns
>
>
>----- Original Message -----
>From: <IfixMGs@aol.com>
>To: <grbyrns@ucdavis.edu>
>Sent: Thursday, January 27, 2000 10:57 AM
>Subject: Re: differentials
>
>
>> Glen,
>> From your prior inputs to the list, it appears that you are
>well-versed
>> in the Spridget. However, I was wondering, from your "worn diff"
>thread,
>if
>> you've had past experience in "differential diagnosis" (pardon the
>medical
>> terminology....)
>> Most of the play which results in 1/8 - 1/4 turn of the
>driveshaft
>> before all lash is taken up is due to play in the thrust washers and
>pinion
>> gear packings. Easily, and inexpensively fixed (even if both pinion
>gears
>are
>> worn out, the parts come to less than $80. If only the packing and
>thrust
>> washers are worn, it's under $14...thru Moss or VB) I've written
>several
>> threads on the MGOC MGB and Midget BB (in the archives) and I know
>there
>are
>> several others. Cut and paste....
>>
>>
>http://www.mgcars.org.uk/cgi-in/soro1?access=10165492207008&page=~mgcars/mem
>be
>> rs/bbsa/index.html
>>
>> Mark Childers Union Jack Spares and Repairs VA Beach VA
>>
>
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