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Steering Rack Interchangeability (Elise/vx/titan/sona/1A Etc)


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#1 paul_mck

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Posted 14 October 2019 - 08:32 AM

My VX (03 NA) hs developed some slop in the steering that Im pretty much certain is from the rack/UJ. The clonk comes from the rack area and the TREs are solid.

 

The car is on 93k so Im planning on a good refresh of the system to both fix this and remove any potential failure in the future. Car will be tracked so I want more than a quick fix.

 

Ive seen a few manufacturers (Titan/Sona/1A Auto) and then youre into s1 elise/s2 elise/K series/Toyota/VX/NA/Turbo etc. Are the racks all the same fitment for UJs/TREs etc?

 

Thanks a lot, Im happy to spend a couple of hundred quid but funds dont stretch to a "new" rack unfortunately.



#2 Johnboyhgt

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Posted 14 October 2019 - 12:03 PM

The Titan is the most serviceable of the lot.

 

The early one has a brass bush just behind the gaiters on both ends and these are no longer available, I serviced mine myself a simple task and the service overhaul kit can be obtained from 

Titan.

 

There's a full set of instructions somewhere on here.

 

 



#3 Arno

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Posted 14 October 2019 - 01:28 PM

Sona racks (part steel, part alu on the outer tube) were fitted to late model cars. Not sure if any VX'es had them as a factory install, although some may have received one when a rack was replaced.

 

There are some replacement parts available for those nowadays too like:

 

https://www.seriousl...ck-toe-link-rod

 

Titan ones are the originals and sold by most aftermarket sellers. These are one piece alu on the outer tube and look like:

 

lotusrack.jpg

 

As far as play, also use some vice-grips on the steering column under the dash and then turn the steering wheel lightly in each direction.

 

Often times the play comes from the U-joints on the secondary column section, either the joint itself or the splined connection on the shaft has gotten loose. In the latter one you can usually do up the pinch-bolts a little tighter.

 

Less common, but still an option as well is that the upper column telescopic section has broken internally. There's a nylon insert in the column to fixate th parts of the shaft, but over time it can fail and then the upper an lower telescoping sections can 'wiggle' around a little. This would be when you hold the secondary section of the shaft stationary and there's no play in that or the UJ's, but still there's play in the steering wheel.

 

Play/clonk on the steering rack itself is usually because the plastic cups in the end of the rack have fractured wor worn and allow the balljoint on the end to develop play there.

 

On a Titan you can replace those with bronze versions:

 

https://www.seriousl...hor-bronze-cups

 

p1010946.jpg

 

You will need to use a (valve-) lapping compound and an electric drill to lap them in/onto the end of the balljoint properly before installation.

 

Bye, Arno.



#4 redvts

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Posted 14 October 2019 - 05:45 PM

Can these be fitted without removing the rack completely?

#5 paul_mck

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Posted 14 October 2019 - 05:47 PM

so I got some time to properly investigate and the play is coming from the upper joint where it meets the shaft heading down to the rack. very noticable play and I can jiggle it with my hand so defo needs replaced imo. ordered a complete shaft with both joints and will do it right.



#6 2-20

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Posted 14 October 2019 - 09:21 PM

Can these be fitted without removing the rack completely?

No you need to remove the rack ...

#7 2-20

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Posted 14 October 2019 - 09:39 PM

May be this...
https://www.ebay.co....e-/252977000357

#8 2-20

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Posted 14 October 2019 - 09:45 PM

so I got some time to properly investigate and the play is coming from the upper joint where it meets the shaft heading down to the rack. very noticable play and I can jiggle it with my hand so defo needs replaced imo. ordered a complete shaft with both joints and will do it right.


So it's not the rack...?
Glad for you...

#9 paul_mck

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Posted 15 October 2019 - 09:25 AM

might be the rack too ffs knowing my luck



#10 siztenboots

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Posted 17 October 2019 - 11:59 AM

also check to see if you have rack raiser plates and bolt torque

#11 paul_mck

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Posted 17 October 2019 - 01:21 PM

just to wrap up - new EP shaft and both UJs fitted last night and all good. the wear came from the splines on the middle shaft. They allowed slack each end and I confirmed by slotting the new shaft into both old UJs and it was nice and tight even without the bolt.

 

rack riser plates are tonights job. hopefully handy enough.






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