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Old 06-13-2006, 01:02 PM
Registered User
Join Date: Mar 2006
Posts: 64
window regulator repair

my "new" 126 300sd had only one working power window when I got it, and 2 of the repairs were nothing more than replacing a bolt or screw.

the drivers side has missing teeth on the end of the large geared ring.
the window would run up to about 1" from top and stop and grind there.

my fix: weld new material onto the piece and grind new teeth into it. worked smashingly well. teeth aren't perfect, but they seem to work.
try it yourself. use a piece of masking tape to line up where the new teeth ought to be cut.
I'll try to remember to post before and after pics.


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Old 06-14-2006, 11:35 AM
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Join Date: Mar 2006
Posts: 64
pics of before,

with additional metal welded on before cutting new teeth,

and after cutting new teeth.
Attached Thumbnails
window regulator repair-window-1.jpg   window regulator repair-window-2.jpg   window regulator repair-window-3.jpg  
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Old 06-14-2006, 12:01 PM
Old Deis
Posts: n/a
Nice looking job, I would not have thought that could be done. Too many times we are just parts changers.
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Old 07-11-2006, 01:21 PM
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Join Date: May 2006
Location: W. WI
Posts: 307
Thanks for the post.
I have the part in the vise, welder set ... and just thought I might check the web to see if anyone is this crazy. I'll use a soft filler metal so the reg. gear should wear better.
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Old 07-11-2006, 01:29 PM
rrgrassi's Avatar
mmmmmm Diesel...
Join Date: Jun 2006
Location: Royse City Tx
Posts: 5,121
Good job there! It was a lot cheaper than buying a new one, and IMHO a better choice.

If you get a "reground" crank or cam shaft, the same type work was done. Welding up more metal, then regrinding to factory specs.


70's Southern Pacific #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 133K miles-replaced the other '06 that quit after 300k miles. (did not catch the bad cam in time)

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 195K

90 Dodge D250 5.9 Cummins/5 speed. 400K
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