Decided to rebuild the transmission

[EuroDat]

Chris,

Here is a list of small parts I ordered for my FS5W71B transmission. They are all Nissan onderdelen with exception of the reverse checking assembly. It was NLA, but they gave me the size (ID22 x 2.5mm) so I could order it somewhere else. Just make sure the material is NBR.

All the parts (with exception of Reverse checking assembly) cost €60. Half that was the speedo pinion, so without the pinion they will cost around $45.

Those prices are from May 2011, but Nissan Parts Zone is close to those prices.

Part Detail

If you need anything else, let me now. I still have all the receipts (in Dutch) and old parts.

Chas

[grannyknot]

Thanks Chas, just put an order in with Courtesy Nissan,

The 5th gear on the counter shaft, is this chip going to chew up the teeth on 5th gear on the main shaft?

[EuroDat]

Mmm, what is the correct answer.... Some will no doubt say replace it. I would use it. You don't have that much choice because the cluster shaft for the 71B is NLA or you are very lucky finding one. Gears should also be replaced in sets especially if they are worn which means $$$$$.

I can't see any pitting or other damage in the photo. It looks fresh, not very old, like something struck it or fell on it and chipped the tooth or the bearing puller chipped a piece of. It can happen very easily and you wouldn't even notice it.

You would have a lot more problems if that piece came between the other gears. That would almost certain destroy the transmission.

Tip: Pay good attention to how the front gear is mounted on the cluster shaft. It can be reversed and will mate up fine with the input shaft gear, but it can make a whining noise because the gears are not mated.

Something strange about the p/n for the main shaft nut. I gave that number to someone in this forum (can't remember who) and he ordered it, but they gave him a right hand thread nut.

I asked my Nissan dealer and he checked it again. In his system its a left hand thread. I didn't know the made them with right hand threads for the main shaft.

Chas

Edited January 22, 2014 by EuroDat

[grannyknot]

Chas, I'm the one who chipped it, I swear I'm my own worst enemy sometimes. For not noticing a snap ring that I failed to install on the front of the main shaft, I have now torn this transmission down and reassembled 3 complete times ...aagggh.

But it took me all day the first time, by the last time I got it down to 40 min. flat.

Oh, the left hand thread on the main shaft nut was a late modification that was done in /83.

I'm just re-using the original nut as it's in good condition .

When I bought the car it came with an /83 5spd that had been abused and was given to me just as a core, but the bearings and syncros were in such good shape from the good tranny with the rattling/ringing sound that I decided to install them in the wrecked tranny just to see what it would be like.

Well, both transmission are back together now and spinning nicely, both have perfect syncro ring/gear clearance.

So, I guess I'll keep the "wrecked" one as a back up in case the the good one is still rattling when I get the car back on the road.

Thanks for all the advice guys.

Chris

[EuroDat]

Hi Chris,

Your story is unfortunatly not uncommon. These transmissions are getting old and its getting harder to find one that still runs good. You will probably find most of the tolerances are approching maximum which makes thing worse. Still usable but not perfect.

I have up re-used the nuts in the past as well. If you know someone with a lathe, you can turn 0.75mm off (360degrees/ one full turn is 1.5mm) That will allow the bad (used) section to turn about 180degrees and give you a new sections to lock the nut.

They can sound klunky when they are not loaded and the bell housing is not fitted. Once the bell housing is fitted and filled with oil that klunking sound your hearing will stop.

Goodluck. Hope you get a better result than I did.

Chas

Edited January 26, 2014 by EuroDat