The Quick/Small/(Stupid?) Question Thread.

[Upsetk9]

I hope I'm not reposting this question but I can't seem to find the old post anywhere.

Does anyone know if a 1966-? fully synchro'd 4 speed or 5 speed transmission is a direct bolt on replacement for the non synchro'd 1st gear 4 speed on the 1965.5 spl310? I'm really tired of a non synced 1st gear and second gear is having issues in the sync department also. I have a g15 (1500cc) engine.

[Nissanman]

ME TOO!
I have now discovered that the synchro on 2nd is easily beaten and it also pops out of reverse gear
What I have determined though, is that it is very important that there is nothing interfering with the rocking motion of the gear stick retaining cap.
Mine was binding on a rubber sheet I had fitted to help plug the hole in the tunnel and changing into 2nd, either up or down, was a disaster!

171020141490 (Large).jpg

I trimmed the hole a wee bit larger so that the sheet sat down further on the 'box and that appears to have solved the problem

A replacement box in my situation is not an option but it will have to come out eventually for repair.

The non-synchro 1st is a novelty for me atm since my car has only been on the road for 8 days.
I guess in the interests of originality it will have to stay that way

[spl310]

The short answer is no, it is not a direct swap. The shifter comes out in a different location, the driveshaft is a different length too. If you do swap, you will have to do tunnel mods and I believe that you will have to get a custom driveshaft. The differential was different from the 1500 to the 1600 making the driveshaft length an issue.

[Upsetk9]

The short answer is no, it is not a direct swap. The shifter comes out in a different location, the driveshaft is a different length too. If you do swap, you will have to do tunnel mods and I believe that you will have to get a custom driveshaft. The differential was different from the 1500 to the 1600 making the driveshaft length an issue.

Thank you for your answer. I really appreciate it. Do you know if the bolt holes line up for the engine?

Mike

[tjp]

Did the early Roadster ever come with flat top SUs?

[Nissanman]

Not as original equipment, I believe.

[tjp]

Not as original equipment, I believe.

I didn't think so either but saw on guy on facetube who said the flat tops on his R6 build are OE.

[Datsun.David]

I know a guy in Calgary with flat top Hitachis on his roadster - off a 73 or 74 Z car... Garbage as a rule...

[Nissanman]

Yes, they were introduced as a means to reduce emissions and are no where near as good as the domed top version I believe

[dbrick]

The short answer is no, it is not a direct swap. The shifter comes out in a different location, the driveshaft is a different length too. If you do swap, you will have to do tunnel mods and I believe that you will have to get a custom driveshaft. The differential was different from the 1500 to the 1600 making the driveshaft length an issue.

Thank you for your answer. I really appreciate it. Do you know if the bolt holes line up for the engine?

Mike

I believe the bellhousing pattern is the same.
I test fit a U20/5 speed in a 64, trans tunnel was tight on pass side. You may want to consider a diesel 5 speed, by grinding the ribs down a bunch it fit in the 64. Considering all the work you need to do, may as well get more gears.
Rear swap is easy, later rear is a bit narrower so you can fit wider wheels and probably use a 4 speed later roadster driveshaft.

[tjp]

If you buy a fuel pump rebuild kit, would you expect to get two valves?
If you buy two fuel pump rebuild kits, would you expect to get four valves?

[Nissanman]

The kit I bought was a full recon. kit and yes it came with everything required to be replaced.
The valves are easily checked using the mouth and blowing, should only pass wind in one direction.
Usually though, it is the moving diaphragm that is the worse for wear, holes, tears etc.

[Trav]

I'm going to be removing my headers in hopes to find where my crazy/loud exhaust leak is coming from.

But, before I do that... having never worked with carburetors. Anything I NEED to know before I try and remove the carbs? Or is pretty simple.... just remove any hose I see attached?

[GeoffM]

It's pretty simple. Kinda like your TB off a 2.5 NA. Make sure you take good pictures and label everything. Very important not to mix and match parts from carb to carb as that can lead to issues especially with the piston/ bell because they are a matching set.

[Nissanman]

...as he said.
But if you are intending to just repair the headers, the carbs. and manifold can be left assembled.