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-   -   Upgrading sb401 gearboxes (http://www.oople.com/forums/showthread.php?t=188826)

cheapskate 23-03-2017 07:26 PM

Upgrading sb401 gearboxes
Apart from the gearboxes and bearings, is there anything else needed to upgrade the gearboxes on the sb401

tonydevon 24-03-2017 08:17 AM

nope thats it

I put so much time and effort into the original setup, that it was quieter than others, did the swap and didnt notice a huge difference LOL

order the bearings from a bearing supplier as the PR packed ones are a bomb

cheapskate 03-04-2017 05:45 PM

How much lash should there be between the pinion and crown gear?
I checked the diffs the other night and there was quite a lot of movement on the diffs

Top Dollar 04-04-2017 01:15 PM

As a guide I look for a little movement, somewhat like the pinion and spur gear. On our 401 gearboxes I have two shims the gear side and one/none the other, plus one behind the crown gear. That works for us. Check the mesh on yours to see how snug it is and adjust as needed :thumbsup:

tonydevon 05-04-2017 07:55 AM

I just went back to my manual, thats where I make build notes, and I have the same 2 shims gear side and one behind the input gear

I had only raced it indoors and really noticed the noise, ran it outside on Sunday for first time ever, and couldnt hear anything different to other 4wd buggies :)

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