Help identifying a Transmission.

[cj8281]

I have this transmission that came out of my 510. 

 

I haven't found the shifter that was in it yet.  It measures approximately 30 inches long and is a 5 speed, reverse up and first down,  IIRC.

[ggzilla]

We were just talking about this three days ago

 

http://community.ratsun.net/topic/62272-tranny

 

[cj8281]

So its a Dog leg then, there were no other tranny's with that shift pattern?

My shifter knob was a bit different than that one, was probably an aftermarket one then.

[ggzilla]

Shift knobs came in different colors and patterns, and Nissan sold different styles.

 

Nissan had many doglegs, but only one that looks like your photo. It should be 26.3 inches long.

[datzenmike]

It's an FS5W71B for an L series engine, made before '80 and most likely from a 620 truck. It's exactly 31.5" long (80mm) The shift pattern is...

 

1..3..5

2..4..R

 

Place shifter in upper left and turn input spline. The output will turn the same direction. Reverse is lower right below 5th.

 

It's possibly from a 280z or first year 280zx but I'm guessing not. If you place in first gear (upper left) and carefully turn 10 tomes while carefully counting the output spline turns at the back of the transmission you can perhaps tell what transmission it isn't.

 

10 input = 3.0 output is a '77-'78 620, possibly a '77-'78 280z or '79 280zx.

10 input = 2.75 output is a '79 620 5 speed

[hosestop@msn.com]

There was a Dime Quarterly that identifies most trany's and ratios , I can dig it up in a box here but have no scanner so maybe someone else has it also on here ! good information , and stay away from Sunset and Hollywood Blvd. them are bad tranny's.

[ggzilla]

The biggest key is the shift pattern. Is it really is "reverse up and first down" as stated, then it can only be one.

 

Place shifter in upper left and turn input spline. The output will turn the reverse direction for the dogleg.

[cj8281]

It looks like this is not the trans that I thought it was.  Reverse is right and down.  It will shift into the 5th gear position but there is no connection between the input and output shafts.  I will open it and take a look to what it actually is.  The other transmissions are hopefully still out at a friends and didn't get scrapped. 

[datzenmike]

It's a 5 speed FS5W71B. Much much stronger than the earlier dogleg and was built for the 6 cylinder Zcar

 

Turn the input while trying to place in 5th gear. If there is no connection then the mainshaft nut may have come loose and backed off. This will allow the 5th and reverse assy to move back also. It was a problem with the earlier 5 speed. Later ones had the nut tightened and staked in place. Won't hurt to remove the tail and take a look. Might be an easy fix too.

[cj8281]

I found my 5 speed.  It was out in a friend's barn still.  this one measures 26¼ inches long.  Oh, the reason I couldn't find the shifter is because I had left it in the transmission.

The first transmission I will pull apart  and see if it is a 4 speed or 5 speed.  I did have a 720 that was a diesel that had a cracked head.  I replaced the motor with an L20B, to use the diesel 5 speed that was in it, I pulled the front housing off of a 4 speed and swapped them.  Worked fine.  The first transmission is possibly that 4 speed with the diesel front case.  I will try and match it up to my L20B block.

[wayno]

There are no photos of a diesel case in this thread that I have seen, if you use that L block transmission, make sure you use the correct throw out bearing collar for the clutch cover/pressure plate that you are using.

[datzenmike]

 

This is an FS5W71B (5 speed) made before '80 and fits an L series 4 or 6 cylinder. It is not from a diesel as they were available on late '80 and the starter is on the driver's side. You don't need to take it apart to tell if a 4 speed or not, you can tell from the outside. .

[cj8281]

Yeah but I do need to take it apart to see why it does not shift into 5th.  If that is not the diesel front case then maybe it got scrapped as I can find no other transmissions for datsuns.  This transmission maybe the one out of the 79 620 that I had. 

[wayno]

4 speeds have the plate with 6 bolts in front of the shifter.

 

[datzenmike]

Turn the input while trying to place in 5th gear. If there is no connection then the mainshaft nut may have come loose and backed off. This will allow the 5th and reverse assy to move back also. It was a problem with the earlier 5 speed. Later ones had the nut tightened and staked in place. Won't hurt to remove the tail and take a look. Might be an easy fix too.

The gears may just need to be jostled slightly when shifting.

[cj8281]

oic

Main nut had been staked, twice already, now it is jacked up.  The 5th gear and the syncro won't mesh now because it rubbed so much.  I will try and lightly file the ends to see if that will clean it enough to slip together.  The nut has to be replaced.  All of the rest of the bearings and gears look great.  Housing inside looks really clean.

Still have no idea what happened to the other 4 speed that I changed bell housings on.

So what is this worth with new seals and all of that?

[ggzilla]

It rubbed so much. What does that mean? Was the nut loose?

 

Cleaned up it will be worth $150. At pick-n-pull they are $95 with warranty.

[cj8281]

The nut was loose, the gear was slid out of the syncro, the spines were rubbing on the very ends and now they don't quite mesh now, it won't slip into place.  I don't think it will take much with a small file to get them cleaned up.

[ggzilla]

Good work.

[datzenmike]

Re use the nut. Torque 100-120 ft lbs. Stake it or a small weld tac will keep it there.

[cj8281]

Gear and synchro are  back together but the nut is done, kaput.  It is quite loose on the threads of the main shaft and the threads are pulling.  Have to find or make another one.