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Jumping Out Of 3rd Gear

tom_g
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tom_g Community Regular

tom_g

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A couple of weeks ago I bought a rebuilt rb20 gearbox off ebay to replace my perfectly functional but very noisy (bearings) box. The seller couldn't find the receipt from the rebuild, so I have no idea what was done or if it was really rebuilt at all. From what he told me synchros on 3rd and 4th had been replaced and he didn't know what else had been done.

Yesterday I had the new box and a new clutch fitted. All gears select fine, but it keeps jumping out of 3rd gear. All other gears appear to be fine, but I haven't driven it much yet, so I can't be certain.

It is always while deccelarating and usually at about 3000rpm.

What could cause it to jump out of gear?

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https://www.sau.com.au/forums/topic/344118-jumping-out-of-3rd-gear/
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turboedsloth Grand Master

turboedsloth

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was the rubber boot around the gearstick installed correctly again? if its around the wrong way it has enough pressure to pull it out of 1st 3rd and 5th. Turn it around and see if its the cause

tom_g Community Regular

tom_g

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was the rubber boot around the gearstick installed correctly again? if its around the wrong way it has enough pressure to pull it out of 1st 3rd and 5th. Turn it around and see if its the cause

That was the problem.

Thanks for your help.

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