T-5 Tranny Case Assembly Help!

[stangman16]

Okay, I've only changed the dogs (as referred to by the parts shop) for 4th gear, and the synchro. Nothing else has been changed. And yet I've got a problem putting this thing back together.
Without that spacer, as shown above in my hand in that picture, and the trans assembled, the tranny is not locked. If I leave that spacer in, and take out the two shims... the tranny is locked when assembled. I don't know how this happens to me, but it is my luck.

Can you tell me, is that Spacer Necessary? I'm ready to drop this tranny in Tomorrow, and to give it a go. Without that spacer, things seem to be okay. But, how did the rebuilder get that spacer in last time? I just don't get it... thanks for the reply!

 

[Mustang5L5]

Did you remove the 3-4 synchro assembly from the mainshaft at all?

The spacer was there for a reason. I just can't imagine it not fitting unless something else is wrong. It may seem fine, but i don't want you to chew up your gears due to mis-alignment of something

 

[stangman16]

Understood. So, I'll put back the spacer. I took out the cluster assemby (holding gears 1 thru 4) but I did not disassemble it. Only changed those two items, and put everything back together. I just replaced the synchro, did not remove the slider. The shop put the 4th gear dogs on for me. ....so, are the shims in the input shaft the only way to determine endplay? I'm stumped, because I can have all those shims out, and the spacer in... and it's still going to be locked when I get the trans put back together.

 

[stangman16]

is this connected right? or could be a problem?

I'm not sure if that spring is connected right, it seems that was the only way i could get it on. Could this be what is locking up the Transmission?

man, i had no idea what I was getting myself into... I'm soo close to finishing though...

 

[Mustang5L5]

WHat exactly do you mean by "4th gear dogs"

4th gear is acheived by connecting the input and mainshaft. The dog teeth are connected to the input shaft. You just replaced the blocker ring correct?

You did not pull the 3-4 hub off the mainshaft did you?

 

[stangman16]

No sir, I did not. I had the shop put on the 'dogs' as they called them. I'm assuming they did in order to change the dogs for 4th gear. (the pieces that are rectangular, prolly 1/2" by an 1/8".... 3 dogs per slider.) Is there something I need to recheck tomorrow?

 

[Mustang5L5]

I'm not sure if that spring is connected right, it seems that was the only way i could get it on. Could this be what is locking up the Transmission?

man, i had no idea what I was getting myself into... I'm soo close to finishing though...

That spring definitely does not look right to me.

Trying to find a photo that shows you how it should sit. I have a rebuilt T-5 sitting in the next room over, too bad it's closed up i could snap some pics

 

[Mustang5L5]

I see a problem here, you don't have the 5-R shift fork spring in the correct place.

On the rail, on the far right you will see a little post sticking up. There is supposed to be a big spring between this post and the post on the shift rail. The spring you have is not in the right location.

Click on the link i posted with the service manual. Go to page 6-7. From there check out the spring and rail assembly in figure 6-13. That's how it should be. Did you touch this peice at all?

 

[proxses]

Just to clear things up, "dogs" are what provide tension to the sliders so they don't just move around.
The spring for reverse/5th should go on that post, and wrap around the shaft that extends back to the fork.
To check endplay, the tranny needs to be on it's end (input shaft pointing to the ground), and you pry up on the input shaft, and measure deflection in the output shaft. It need to be .000-.002 inches.
If you can get that kind of deflection (endplay) without that spacer, then you don't need it. You have to measure to be sure.

 

[stangman16]

..believe it or not, that spring was there in that location when I took the tranny apart. I'm just not sure if it needs to be flipped, rotated or whatnot to how it originally was. There was no big spring like the books shows me. I couldn't even find that smaller spring in the book. I'm not suprised to have mis-matched parts.... just the luck I have I guess. Seems everything I touch concerning this '66 mustang is mis-matched and takes me time and more money to get it correct. (and this Tranny didn't even come with the car... shows how bad of luck I have)

So, I need to try and find the bigger spring at a tranny shop somewhere and install that... if I do that, can I rid of that smaller spring? I did take out that shift rail, with no bigger spring on it. I'm not sure how else that shift fork is to go on there... I'll try re-reading the service manual book I have and seeing if I can get it tomorrow.