John,  
MGA 1600 MK 2 had the 4.1 ratio and this will bolt into a TD/TF housing. A
gear set will cost about $200.00, possibly more as this ratio is relatively
rare. Installation is extra.
A 4.3 ratio is generally considered ideal for the average use TD with a
1250 cc block. I have a 1500 XPEG block and 4.3 ratio in my TD and could
probably pull the 4.1 ratio. Even a 4.3 ratio car will require some engine
power improvement to work satisfactorily. 
Bob Grunau
----------
> From: Mailjbrown@aol.com
> To: mgbob@juno.com
> Cc: mg-t@autox.team.net
> Subject: Re: TD real axle grear ratio
> Date: Saturday, January 15, 2000 6:53 PM
> 
> Hi Bob:
> 
> I have never heard of a 4.1 ring and pinion set.  Can you tell me the
source 
> and price of a 4.1 conversion set for a 1953 TD?
> 
> John
 
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