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View Full Version : TR2/3/3A How to identify what steering box and column I have on a TR3a?



tdskip
02-06-2014, 04:38 PM
Hi guys - I understand there were several differences on the steering assembly the TR3-TR3a used. I have a rebuilt box and column from TRF from my project that was never used and want to make sure I accurately describe it.

What should I be looking for?

Thanks!

trglory
02-06-2014, 05:05 PM
The only difference I am aware of is that they produced the steering gear originally with a one piece shaft, and later, with a two piece shaft. The one piece shaft goes from the steering box all the way up to the steering wheel, whereas the two piece shaft is split in the middle with a splined coupler connecting the two pieces.

Joe

martx-5
02-06-2014, 06:00 PM
They also had adjustable versions of both the split and one piece columns. The adjustable versions have a locking wheel on the upper part of the column between the steering wheel and the dash. Unlocking it allows the wheel to move from too close to way too close. :glee:

Lou Metelko
02-06-2014, 06:40 PM
According to TRA's Judging Standards manual TS27000 to TS42000 may have one piece or split steering column. Earlier than TS27000 should have the one piece / later than TS42000 should have the split. That TS range roughly covers the production of the 3A during 1958. In one of Piggott's books he comments that it is strange that there was no definite stop / start from one to the other system. Having the split column made it much easier to remove the steering box.

Lou Metelko
Auburn, Indiana

TR3driver
02-06-2014, 08:13 PM
According to TRA's Judging Standards manual TS27000 to TS42000 may have one piece or split steering column.
FWIW, TS39781LO had the split column. The added mounting tabs on the frame, and the captive nuts on the firewall all looked original, so I'm fairly confident it was built that way.

The fixed wheel version of the column has a very short section of splines (perhaps 3/4") with a tapered seat just below them. The adjustable wheel version has much longer splines (3 or 4" worth) and no tapered seat.

As far as I know, the steering box for split column adjustable wheel is the same as the box for the split column fixed wheel.

But (in case it's not obvious), the box is different for RHD vs LHD. The threads on the worm are different, too. One of my bits of Triumph memorabilia is a brand new RHD worm :D

mrv8q
02-06-2014, 08:22 PM
One of my bits of Triumph memorabilia is a brand new RHD worm :D

What will the NSA think of this thread, RHD worms!?

tdskip
02-07-2014, 09:38 AM
31557

31558

Thanks for the help guys - here are pictures of the actual column.

vivdownunder
02-07-2014, 09:45 AM
Evidence has surfaced that the change point to a split steering column was TS34533. Thereafter Mulliners suppled the painted body with attached front apron, rather than loose as required for the one piece column.

Viv

tdskip
02-07-2014, 09:49 AM
Thanks Viv, hope all is well down under.

trglory
02-07-2014, 12:27 PM
Hmmmmm ...... my TS33077L has a split column.

Joe

TexasKnucklehead
02-07-2014, 11:06 PM
I'm still trying to understand why LHD and RHD cars would have a different worm. Does turning anti-clockwise make the car go right?

There is also a date code stamped on the face of the bottom cover -the cover the olive is attached. It's usually hidden under a bunch of grime, and/or painted over. It's the usual form of 2 numerals for the manufacture week, and 2 for the year.

TR3driver
02-08-2014, 01:07 AM
I'm still trying to understand why LHD and RHD cars would have a different worm. Does turning anti-clockwise make the car go right?
The box itself is also mirror-image, the steering column is always inboard of the rocker shaft. The arm with the peg comes in from the opposite side. So, for a LHD box, pulling the peg towards the driver turns the wheels to the left; while for a RHD box the peg has to be pushed away to turn left.

(Or maybe it's the other way round, but you get the idea.)

TR3driver
02-08-2014, 01:09 AM
31557

31558

Thanks for the help guys - here are pictures of the actual column.
So obviously that is a split column, which I believe is the same for either fixed or adjustable steering wheels.