JIM There are a number of ways to handle this
1/ Buy a TR4-TR6 all syncro o/d trans & slip it in.only mod to worry about
is slotting the holes in rear trans mounting plate to allow 3/4" longer assy
to mount.If rear end ratio is 3:70 your Od ratio in 4th will be 3:03.Great
crusing gear with 60MHP is about 2500 RPM.
2/ Buy an o/d (a-type) from TR3A & be sure you get adapter plate & o/d
mainshaft
pretty straight forward but you will have to strip non-syncro box to put in
main output shaft.little difference in assy length.Quit easy to do.
No need to shorten drive shaft on either instalation.
3/Buy a non syncro box w/od & just exchange.However,syncro first is nice
to have
KEN G.
British Frame & Engine
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