Oh yes they can be made to do a lot!

Thanks for the posts, guys. I found a site which mentions that the T85 fitted to some Fords has the R11, and yes, it seems they do have a lot of commonality. I don't know if they are completely common apart from the planetary gears, but what I've been told is that they basically are, they have four planetary gears instead of the three in the R10.

Again, I'm not interested in an R10, I have one of them and I could find more. If, however, it turns out that the cage and gears could be slipped into an R10 from an R11, I don't think I'd need anything else.

Problem is I simply don't know.

Another point... I don't regard them as of much use with a 4-speed. At least with the gear spacing of a typical 4-speed. I reckon they're best used to split the gears, as they do nicely in most 3-speeds. A 4-speed basically only uses them a cruising option, though in some circumstances it's an easier way to slip up to the next gear for a bit if you know you're going to need to go back again shortly.

Last edited by Ray Bell; 07/31/08 05:25 AM.