I got 71B 5 speed bellhouse from one of my friends. I decided to move onto 240SX transmission swap into my 280z.

First of all, bellhouse comparison. It looks like there are several different 71B bellhouse with a bit different pattern.

This is my original 71B 4speed. It's written "L2"

This is the 71B 5speed bellhouse I got. It also written as "L2"

This is 240SX 71C bellhouse. It written 71B...

with some animal?

I found some pic in internet that is written 71C for 71C bellhouse.

Thanks for the people to share knowldge and experience of 71C swap information.

http://atlanticz.ca/zclub/techtips/240sxtransmissioninstall/index.html

http://zhome.com/ZCMnL/tech/240SX5spd/Transmission2.htm

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Start grinding with hand belt sander. It quite easy to grind. Need to grind al least 2.5mm.

Got 16mm drill bit @ eBay. Drilling from front side of bellhouse is easiler.

done.

Forgot to order bearing.

Parts number is

32219-E9000 or 32219-E9020

Here's another one - DSC04293JPGThumbnail1jpg id 266482 | Motortopia

That bearing is difficult to remove. I had to rig up a cheap two prong gear puller with a clamp to get in to the small space available.

Don't forget to put the transmission in to gear when assembling. It's possible to get it stuck in two gears at the same time when the bellhousing/fron case is pushed over the shift rods.

Thanks Zed Head for great information.

I didn't find that web site. That's really helpful.

I rebuild 71B tranny before, so I know how hard to pull out the bearing :-)

Don't forget to put the transmission in to gear when assembling. It's possible to get it stuck in two gears at the same time when the bellhousing/fron case is pushed over the shift rods.

I will! Thanks!

This is 240SX 71C bellhouse. It written 71B...

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with some animal?

I found some pic in internet that is written 71C for 71C bellhouse.

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Strange that the 240SX tranny has 71B stamped on it?

Yer, whats with the animal? Its on both. Looks like a kangaroe.

Ill have to take closer look at mine. Its from a 300ZX so it a lotdifferent to the 71C out of the 240SX.

Chas

Here's my 1985 300ZX (so I was told) bellhousing. Notice the fill plug below. It's the left hand side, and you can see how the case flares (like a bell).

Are you sure that all of your pictures are bellhousing and not the back half? Hard to ell since they're all close-up.

I have my transmission in the garage but didn't drag it out to see the other side.

I dug my 71C out from behind all the other junk I have been hoarding and took these photo's. Its out of a 84/85 model 300ZX with 83000km. Im not sure what the sticker means on the bellhousing. It also had a paper sticker on the side with "OK" in black text, but its now fallen off. Ill have to search for it.

The V71C transmission has the 17mm wide gears and no reverse synchro.

The RB71C transmission has the 20mm wide gears and reverse is synchro. If you hear the term "full synchro gearbox" that is what they mean.

My tranny looks similar to Zed Heads tranny.

Chas

I have a sticker on mine also. Probably the elusive serial number. It would make more sense to use a sticker, stamp or engraving than to cast it in to the housing. Number applied when the unit is complete and passes inspection.

Thanks Chas for the info.

Sounds like s14(Kouki) has RB71C tranny with 20mm synchro.

Zed Head,

What you said totally make sense regard to the sticker.

Kinda late to the thread but I'd thought I'd chime in. The 71C in both the Z31 and 240sx are the exact same transmission and bellhousing (98% sure about this part). Neither had reverse synchros. Nissan started using the Z32 transmission in 87. From 07/87-89, the turbocharged Z31 used the Z32 internals but a different bellhousing. With the Z31 testing out the new transmission, Nissan didn't want to halt production of a good transmission. So they put them into the 240sx.

Not a big deal in the big scheme but the later 240SX's did get the reverse synchro.  It's shown in the Motortopia link above (copied specific below), and in the FSM's (baulk rings for 5th and reverse, 1996).  Of course, Nissan kept the 240SX name but changed the platform from S13 to S14, so that's different.

 

The Z31 71C's had some improvements also, like double synchro rings for 2nd gear, some years even had double rings for 2nd and 3rd.  The cases are the same though, so the swap procedure works on any of them. 

 

Don't know about the Z32 versus Z31 stuff.  People tend to call this a bellhousing swap but it's actually a front case swap.  If you're from GM world, a bellhousing is completely separate from anything that holds gears and bearings.  It is essentially an adapter for the trans and engine, and covers the clutch, flywheel and input shaft,  In the procedure being discussed here, the part being swapped is precisely machined and contains the bulk of the gears and bearings.  The "T5"'s use a separate bellhousing, I believe, but that's a completely different transmission and manufacturer.

 

http://www.motortopia.com/cars/1973-datsun-240z-11118/car-pictures/240sx-transmission-swap-14041/IMG_2766JPG_Thumbnail1.jpg-412263

It's been awhile.

Finally I re-start working on this.

Remove bell house of 71C tranny and try to remove bearing.

AS Zed Head mentioned, it really hard to pull bearing since there is no space for puller.

At first, philip driver to open up a bit space..

Then, use hammer to open up more space...

Finally, use puller to remove bearing.

 

installation of 71b bearing is no problem.

When I installed 71b Bell house, it was so tight to shift on 1st and 2nd gear.

I compare with 71C and 71B bell house.

Just enlarge to 16mm hole is too tight. I noticed there is some space for each rod.

So, I taper cut the red section. It now easier to shift.