Roadster 5 speed help

[john510]

Ive got a roadster 5 speed A series transmission in my 510.It shifts through all the gears just fine.There are no grinding,clunking or whining noises.Its now all of a sudden jumping/popping out of 5th gear under hard acceleration.If i just cruise in 5th its fine but as soon as i hit the throttle hard it pops out of gear.Any ideas what might be wrong ?

[datsunrides]

Probably the nuts on the output shaft backing off. Pretty common problem for the Roadster 5 speed.

[datzenmike]

This was also a problem on the early 71B 5 speeds. The later ones are staked in place..

[john510]

Thanks,im assuming these arent accesible unless the trans is taken apart ?  the only thing that scares me about my car is taking a transmission apart without a manual.

[ggzilla]

Is it an original roadster 5-speed? 71A transmission model?

[datzenmike]

Ive got a roadster 5 speed A series transmission in my 510.I

 

Should be the one in the foreground. 71B behind.

 

 

The tail removal should be similar to the early 240Z 4 speed as well as the older Roadster.

[john510]

Is it an original roadster 5-speed? 71A transmission model?

Yes it is,monkey motion shift linkage with a L-series bell housing.I think it has a close ratio gear set.