Item Subject: cc:Mail Text
I'd like to find out what's involved in adding an overdrive unit to my
'60 TR3a. I may have an opportunity to get one if I act fast, but have
to know how much I need to buy. Here's what (I think) I need to know:
1. On my Spitfires I recall that the mainshaft of the transmission
carried right through into the overdrive unit. In other words, in that
case you'd have to get the transmission/od together. Same on TR3a? Or
can I just buy the overdrive unit and bolt it on?
2. Is the overall length going to be different, thus necessitating
getting the shorter driveshaft from the overdrive(n) car?
3. Should I care about the differential ratio?
4. Any speedometer implications?
Thanks in advance,
Jim Wallace
Laycock anticipator
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