The 510 Realm

Will a L series bell housing fit a napZ transmission

In short - yes IF the L series bell housing was a 71B 5sp - maybe a 4 speed (not sure if someone can collaborate).
It is important to check the shims on the ends of the main bearing shaft, this is important as incorrect shimming will lead to the transmission not wanting to stay in gear - so it needs to be checked.

I'm no transmission guru, but this is what I do know to date.

Byron

Byron510 wrote: ↑23 Jul 2018 15:43 In short - yes IF the L series bell housing was a 71B 5sp - maybe a 4 speed (not sure if someone can collaborate).
It is important to check the shims on the ends of the main bearing shaft, this is important as incorrect shimming will lead to the transmission not wanting to stay in gear - so it needs to be checked.

I'm no transmission guru, but this is what I do know to date.

Byron

Byron is correct, the counter shafts bearing needs to be measured and properly shimmed.

iceD wrote: ↑23 Jul 2018 13:53 Will a L series bell housing fit a napZ transmission

It's actually a front case as it covers all the gears 1 through 4 and not just the clutch. Yes 4 or 5 speed cases will bolt on with two or three possible exceptions you will need to check.


1/ Some older 4 speeds have the reverse switch about an inch behind where all other 4 and 5 speeds are. It's rare but could happen.

2/ If the NAPS 5 speed is from a '75 truck it will have a 62mm counter bearing. All 71Bs made before this have a 56mm bearing so the 62mm bearing will obviously not fit the 56mm hole in the front case. Easiest thing to do is pull the 62mm bearing off and hammer a 56mm bearing on. A new bearing as they are failure prone and why they were increased to 62mm.

3/ On the '85 and up 71B the first/second shift rod may have been increased from 14mm to 16mm. Again this won't poke out through the front of the earlier front case. Just drill it out.

got a guy needing trany work on his 81 diesel 720 2wd, will bits from one of my 720 z24 gas pot trans work ?

RMS wrote: ↑29 Jul 2018 18:06 got a guy needing trany work on his 81 diesel 720 2wd, will bits from one of my 720 z24 gas pot trans work ?

Eh Robyn, I was once told that the diesels have a larger input shaft spline. I’ve never had the chance to verify, maybe you could if it’s going through your hands.

Regarding interchangeability, I don’t have that information. But it would be very interesting to know what the gear set is.

Byron

I have an '85 diesel in pieces and the input splines are the same as all Nissan input splines. Only the front case is different with the starter on the driver''s side and the bolt pattern. Actually the diesel front case can fit the Roadster R16 and U20.

RMS wrote: ↑29 Jul 2018 18:06 got a guy needing trany work on his 81 diesel 720 2wd, will bits from one of my 720 z24 gas pot trans work ?

.... yes. The diesel used a wide ratio gear set, the Z24 depends, as, wide and mid ratio sets were used. If the Z24 transmission is in good order swap the diesel front case onto it and drive away. If it's from an '85 swap the diesel front counter gear bearing onto it. Possibly the first/second shift rod hole will need to be drilled out to 16mm from 14mm. Use the diesel front cover plate over the bearings.

I have a transmission that somebody wrote '80 200SX can anybody tell me what transmission that would be

Thanks

ice D

That would be for the second generation S110 200sx. It has a Z series bolt up pattern and is a Mid ratio with a 3.321 first and 6 output turns for 20 input. The overdrive 5th is 0.864 or 13.6% OD? It will not bolt to an L series engine without swapping an L series front case onto it. However it's every bit as strong as the 280zx (non turbo) transmission and a good 5 speed.

I suppose who ever wrote this could have been mistaken on the year and it was a first generation S10 200sx. Simply measure the length... if 31.5" it's an S110 FS5W71B 5 speed. If 26" it's from an S10 and an FS5W63A... and some would say congrats you have an L series dogleg.

Post a picture of it???