Mk X Moss gearbox with Overdrive in S2 2+2

[iani]

Is it possible to fit the OD gearbox from a Mk X into a S2 2+2? I realise that a 5sp box would be better but I like having an OD box.

Ian

[Heuer]

http://etypeuk.com/forum/viewtopic.php? ... hlight=mod

[iani]

http://etypeuk.com/forum/viewtopic.php? ... hlight=mod

I note Peter's comment that no other box will fit, however, the Mk X does use the short A type OD and looks identical, hence my question.

[Sarthe72]

I know of a few people who have put the Moss O/D box into a S3 E-type which is the same as a 2+2 as far as this subject is concerned. It obviously means shortening the propshaft and in 1974 we toured France with my flat floor and a V12 roadster so converted. I drove it, and with a 2.88 axle ratio I seem to remember the car was at 1500 rpm at 60mph. Overall, his fuel consumption was lower than my 3.8! John Burton of the JDC has also done the same with his V12 2+2. The owner of the V12 told ne he could do it to my flat floor but my propshaft would be very short!

[christopher storey]

I really cannot believe that anyone would put a Moss box into a 2+2 . Whilst they may have a certain antique charm in a 3.8 , they really are not a patch on the 4 synchro box either for change quality or for noise . Whilst the OD does cut rpm, it is not quite as extreme as Sarthe suggests, and with 2.88 will produce about 33.4 mph/1000 rpm

[iani]

Thanks for all the replies, I'll see how my 4sp reacts to a fluid change (red line) this weekend, if the hot reverse select improves then I'm in no hurry to change anything.

Ian

[PeterCrespin]

As far as I know, no Moss box was fitted with a Compact Type A overdrive. So either it's a Moss box and will need far more surgery than merely a shorter propshaft, or it's a drop-in OD setup but not a Moss.

Anything can be put into anything if you've a mind to, but even the Compact Type A can require very slight fettling of the tunnel at the very back of the box. You just have to look at the boxes side by side, as I do every day in the workshop, to guess that anyone who thinks a Moss box with the much larger overdrive is going to be easy, is in for a nasty surprise, a sizeable bill and console/seat rejig or a weakened shell - quite possibly all three. As for fitting one in a SWB car, forget it.

There's a reason Moss overdrive boxes are half the price of 4-synchro OD boxes, same as MkX manifolds are half the price of E-type manifolds...and that's without Chris's accurate comments on refinement.

Pete

[iani]

This is the box, does this look like a compact OD? The vendor says that the gearbox number is GZN 2455 JS, I haven't been able to find reference to GZN but I think JS is the Moss box & the vendor says it's a Moss box. He isn't sure it came out of a Mark 10 either.

[PeterCrespin]

It's definitely a Moss Box judging by casing and the top lid. It also looks like a short overdrive but it's unlike any Jag one I've see and isn't a Compact Type A. There appear to be extra solenoids or controls of some sort under the overdrive. Since they don't seem to protrude sideways they may all fit in a 2+2 tunnel. My guess is it could be off some other make - probably a lot smaller than a MkX.

I'm no expert on Triumphs but it doesn't look like the longer Triumph MOD boxes I've seen. Rover? Morgan? Maybe it is from a Jag and I just don't know the older model. A 'Mk 1' perhaps (don't think so). Either way, deliverately fitting a Moss to an E-type that didn't use it is slightly eccentric IMO.

Pete

[iani]

Thanks Pete, I think I'll just clean it up, find out what it belongs to and try to sell it on.

Ian

[iani]

Overdrive Repair Services have confirmed that this is a unit from Mk10 after all and not appropriate for E-Type use, back to eBay then.