Fitting Gearstick shifter

[pinza]

Hello all,
My 3.8 FHC is undergoing a full restoration.
I have had the Gearbox checked out and have come to the “easy” part of putting the shifter back on.
However, I can’t work out if I’m doing everything correctly - it seems so simple, but the maths doesn’t add up:
(Apologies for using metric).
Referring to the attached photo, I presume I need to insert parts B, C, D & E into A.
If so, then B is 19.1mm, C & D are 2.6mm each and E fully compressed in my vice is 3.8mm = Total 28.1mm
However A has an opening of only 26.0mm.
C & D are new parts C1908, and E (also new) is C1929.
Perhaps I have the wrong Part A? Or maybe the very top of the gearbox is non-original (the gearbox number matches my Heritage Certificate - except my box has CR on top and side whereas Certificate has JS - happy for feedback on this too)
The photos I have taken on the dismantling have missed this - I hope the answer will be quite simple as to what I am missing. Maybe I bought the wrong washers?
Thanks in advance,
Glenn

[christopher storey]

Glenn : I am having some difficulty understanding the problem . Is not E the spring washer ? And is it not the case that the nut and thick washer on A come off altogether to allow B and its ancillaries to slide onto the shaft of A ? Do you not then just replace the nut and washer and tighten until there is just enough spring tension from the spring washer to pre-load the gearlever to its correct position away from the reverse gear slot and towards the 3/4 gear plane ?

[mgcjag]

Hi..not your gearbox but this may help

[pinza]

Sorry for the confusion Christopher.
I have attached another photo to show my problem.
The diagrams don’t show whether the washers go inside or out. It makes sense for the fibre washer to be adjacent to the shifter, and if the spring washer is outside there is too much play.
Thanks
Glenn

[angelw]

Glenn Wrote:

The diagrams don’t show whether the washers go inside or out. It makes sense for the fibre washer to be adjacent to the shifter, and if the spring washer is outside there is too much play.

Hello Glenn,
One Tufnol Washer (your parts C and D) is assembled either side of the Boss of Part B, through which the Pivot Bolt passes. The Thackery Washer (your part E) fits between the outside surface of the left Tufnol Washer and the inside face of the left lug of your part A. The whole assembly is difficult to assemble, with the Thackery Washer having to be nearly completely compressed to assemble the parts.

My procedure is:
1. Initially assemble the parts omitting the Right Side Tufnol Washer.
2. Pass the Pivot Bolt through the bore of the Left Lug of Part A and the bore of part B, until the end of the Pivot Bolt doesn't quite protrude through the Right Face of Part B. This will hold the Thackery Washer and Left Side Tufnol Washer in place whilst attempting to place the Right Hand Tufnol Washer between the inside face of the Right Lug of Part A and Right Hand Side face of Part B

Regards,

Bill

[pinza]

Thanks Bill,
You have reassured me that I have the correct order of parts, however as per my post #1 I come up 2.1mm short, so something is wrong with my parts - maybe my part A is of a different car? I would love to have that inside measurement.
Thanks,
Glenn

[angelw]

Glenn Wrote:

however as per my post #1 I come up 2.1mm short, so something is wrong with my parts - maybe my part A is of a different car? I would love to have that inside measurement.

Hello Glenn,
Are you measuring the parts with the Thackery Washer completely compressed?

Measuring inside the lugs of Part A on an assembled unit (difficult to get an accurate measurement when assembled), its 26.3mm. The width of the boss on part B, is 19.05mm (0.75").

If you can wait until this time tomorrow, I can make more accurate measurements of part from a dismantled Gearbox.

PS. Having reread your first Post, 2.6mm for the Tufnol Washers seems a bit much. I can't get to measure these until tomorrow. I'll measure the Thackery Washer also.

I see that you're located in Victoria. Whereabouts, if you don't mind me asking?

Regards,

Bill

[pinza]

Hi Bill,
I just sent you a PM
Thanks,
Glenn

[abowie]

I've got a couple of Moss boxes in the shed so I'll have a look this afternoon for you.

[Geoff Green]

Glenn,
You do not have a Thackery washer. The first photo shows a split lock washer. You cannot use the split lick washer as it will tear into the fiber washer. The Thackery washer takes up the slack and provides some spring when going into gear ( reverse) easing pain in the hand. The cotter pin locks the nut to the bolt.
Geoff

[pinza]

Thanks Geoff,
I hope you’re correct. Here’s a another photo of part number C1929 recently ordered from the usuals.
I agree that this would rip into the Tufnol washer, but I can only trust it is correct - this is the first time in my life I have encountered a “Thackeray”, so I hope it is correct. It looks like the one in the photos on their website.
And Andrew, I appreciate your checking for me too.
Thanks,
Glenn

[abowie]

Found them.

Photos of Moss box.



Also my 4.2 box.

[pinza]

Thanks Andrew,
Looks like my Thackery doesn’t have that diagonal cross-over bend in it & my Tufnol washers also look too big.
I shall persevere.
Glenn

[angelw]

Hello Glenn,
I didn't receive your PM. My email address is:

bill.angel@bigpond.com

What makes a Thackery Washer stand out from the herd is the diagonal component between each face coil; see the the following picture. The Rule is not in the picture for any dimensional reference, but to stop the Thackery Washer rolling away until I could take a picture.



The thickness of the Tufnol Washers should be 0.075" (1.9mm). These are the same parts for all the early Jag Gearboxes (Moss or All Synchro). An original Thackery Washer measures 3.4mm fully compressed. Accordingly, I doubt that you will be able to assemble the gear lever using the parts you have. The Thackery Washer you have is rubbish and I wouldn't use it.

Regards,

Bill

[pinza]

Thanks Bill for your measurements.
It all makes sense now !
I will go back to the suppliers & won’t have to leave the car in second gear after all !
An email is on its way.
Glenn

[angelw]

Hello Glenn,
I've measured Tufnol washers received from SNG Barratt recently and they measure 1.7mm (slightly thinner than the originals - I have no problem with that). Accordingly, using a correct Thackery Washer of 3.4mm and two Tufnol Washers at 1.7mm each, the following will result:

Total Width = 3.4 + 1.7 x 2 + 19.05
Total Width = 25.85

With a width between the lugs of your part "A", the assembly would fit.

The wave in the correct Thackery Washer allows for the effective thickness of the Washer to equate to only two thicknesses of the flat strip used in it's manufacture. Without the wave, one area of the Thackery Washer will be the thickness of three strip thicknesses.

Regards,

Bill