[TR] Overdrive gearbox help

don don at napanet.net
Mon Feb 1 15:26:59 MST 2010


Hello TR guys,

I recently bought a TR4A which does not have overdrive.  Any tips on 
buying an overdrive gearbox?  What is a reasonable price?  What year 
gearboxes fit; do TR6 ones work or are they different?  What other 
pieces are needed to make the swap?  And what are the things to look 
for in a gearbox as far as likely problems?  I got an email from a 
fellow who has one for sale for $1,200.  I don't know if that is a 
good price or not.
Thanks!

Don Scott
Calistoga CA
2001 Miata SE BRG
1973 MGB GT (for sale)
1966 TR4A
1962 MGA Mk II  


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