Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

possible to fix this cr steering box?


Recommended Posts

My 72 came w/ a close/quick ratio steering box.   


Does anyone know whether worn steering gears can be refurbished if I'm willing to fork out enough $$ to a machine shop?  If someone had done this successfully and had good results, I'd love to hear some details.   


This damaged box has been sitting on a shelf for 6 years, but I think I've developed the arm strength to wield it if I can get it repaired







Rusty 74 verona

WTB a roundie!

Link to comment
Share on other sites

that gear has spalled, which is a fatigue crack mechanism.  welding as mentioned is one possibility.  i'd grind out all traces of the spalled area first.  use a high Cobalt filler metal (stellite) or high Nickel for a little more weld crack resistance.  you'd probably want to preheat prior to weld, say 400F and let it furnace cool after weld. 


alternatively, if you could machine a clean section out, you may want to try merely silver soldering or braze a piece of tool steel, such as a lathe cutting tool blank into the carefully prepped area and then hand grind to shape.  when you're close to finish size, polish using 400grit emory cloth.   yea, lot of work, but perhaps a solution.  it's primarily in sliding contact so if you can acheive a smooth transition it should stay put. 

Former owner of 2570440 & 2760440
Current owner of 6 non-op 02's

& 1 special alfa

Link to comment
Share on other sites

Given the pressures involved (it takes a LOT to deform steel that hard that way) I don't think you're going to have much luck with that poor thing.


As Andrew says, it's a pretty complicated shape, from a time when making cool mechanical shapes was approaching its heyday.


There have been a number of threads promising the wonders of everything from 3d printing to cad manufacturing, but no parts have ever come of them.


Honestly, you would probably be money and time ahead to design a steering rack replacement that has the ratio you want...






"I learn best through painful, expensive experience, so I feel like I've gotten my money's worth." MattL

Link to comment
Share on other sites

thanks all for the feedback.  


I was hoping someone might have found a solution or started to fabricate new steering box worm gears, since silly people would be willing to spend a chunk of money to rejuvenate them.   If I happen to find a solution, I'll report back here.





Rusty 74 verona

WTB a roundie!

Link to comment
Share on other sites

You can not "fabricate new steering box worm gears" and IF you do it will worn again, 
however, IF you/ somebody can remanufacturing it will be nice, but it will cost a lot due to 

low production number issue, lets say like 1000~1500 $ + its very old base tech and most 
people prefer upgrade to  rack and pinion....

I can fix it cause I have free welder, my uncle :)
I saw hime repairing very rare camshaft with this technique, welding, reshaping and hardening.
if its works for camshaft it should works for this one two, the problem with type of repairing is the 
material of welding which is harder than other part and later it will wear other parts :D

edit : I added pic of BALL type steering box, aka Recirculating ball and this what you need, 
the sample pic belong to Paykan a British car.

its has 5/17 ratio in strait line and 5/20 in hight turn( it become lighter when you tuning it) 


http://www.farmankhodro.com/public/user_data/نقشه ها/جعبه فرمان/Naghshe Paykan new.pdf





Edited by persian-turbo
adding more info


Persian Automotive Community And Discussion Board

Link to comment
Share on other sites


I checked my box of steering box parts.

I've got a NOS worm left but prefer to keep that for my own 2 steering boxes for my track car.

As it is a NOS still in the ZF bag, I can ask a good machine shop to duplicate it for me, but I don't want to go that route until I have at least 10 subscribers that will guarantee to buy one from me.

I don't know the cost yet either.

Worms where reproduced about 15 years ago by Heino Stolle in Germany and those costed about 1500 EUR a piece (before you ask, they are long gone).


If the wormwheel would have been damaged, that would have been easier. As you see in the pic, I have about 3 hardened wormwheels still in stock... (the fat ones compared to the standard one)

I had those reproduced a few years ago and they are quite easy to exchange.


You can also offer to buy 10 straight away :-)

Tom from Belgium


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

  • Create New...