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D15Z1 Transmission

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2.6K views 12 replies 5 participants last post by  c_rex90  
#1 ·
How can I tell if a tranny is from a d15z1 or a d15b vtec-e?

I was told the S20 marking signifies the z1 but I'm thinking that it will also have the same stamp for most 92-95 trannys
 
#4 ·
ScottMog said:
So I'm just going off the persons word pretty much...
Open it up and count. That trans shouldn't be worth a lot of money, but you still wouldn't want to throw away money; and if you do feel free to throw it my way :lol:
 
#8 ·
ScottMog said:
Mista Bone said:
CX/VX is easy to tell from the other S20 transmissions.

Put it in 5th gear, turn the input shaft 10 times, count the number of rotations of the diff, then do math.
Care to elaborate a little more? I was hoping the guru would respond :)

How do I put it in 5th gear if the tranny is on the floor not attached to anything?
That is why he is the man!
 
#10 ·
jfrolang said:
ScottMog said:
How do I put it in 5th gear if the tranny is on the floor not attached to anything?
Orient the transmission so that you're "behind" it like you would be if you were both in the car. Now you see that shift rod there? Stick a screwdriver or something through the hole, rotate it to the right, and pull it out.
Perfect, I can totally picture that. Thx a ton.

I'm still somewhat waiting on a picture of the vx tranny "dot" after the 10 spline spins.
 
#12 ·
Mista Bone said:
10 / 3.25 / .702 = do your own math!

Or if you are really lazy, highlight it and search Google for it.
4.383081306158229235152312075389

I still dont know what that means though lol...

Would it be like an x/y axis? If so where would the starting point be located? etc...

I just want to be able to get all this info so that went I go to look at the tranny I dont waste the sellers time.
 
#13 ·
You can do it in any gear, 10/final drive/gear ratio=xxx. That number is the number of rotations the diff will make after you rotate the main shaft 10 times.

Mark the diff and the main shaft at 12 o'clock, thats your starting point. Rotate main shaft 10 times. Then note the location of the mark on the diff.

If you use 1st gear like in the pic I posted. The Vx would land in about the same location as the hf but on the opposite side of the vertical axis.
1st gear:
Hf- 1.04 rotations
Vx- 0.95 rotations

If you use 5th gear, the diff will rotate about 4.4 rotations from its starting position.