Okay guys, I just swap out a motor on my 91 and it shifts fine when car is not running, but when it's running it's not going in gear. What did I do wrong?

 

sounds like you didn't do the clutch fork right. if you aren't disengaging the clutch it'd be hard to shove it in a gear.

I'm assuming you have pressure at the clutch pedal, right?

 

Yes I have pressure at the clutch pedal. It's a ACT HD pressure plate with street disk.

 

Sounds like you need to adjust the clutch pedal height so that when depressed, it fully disengages the clutch. To verify that the clutch is not being fully disengaged, press the pedal in and then apply pressure to the shifter to try to shift it into 5th. gear. This will put a load on the syncros if the transmission is turnning and the engine RPM will bog down a couple hundred RPM's, verifying the clutch isn't fully disengaging.

 

I thought it was the clutch pedal heigh, because I adjusted before I start the car, but I put it back to what it was and still same.

 

Well, still try that little test and that will tell you if the clutch is fully disengaging or not. Did you try bleeding the clutch lines? Air in the system would cause the clutch to not fully disengage.

 

But I didn't even open up the clutch line.

 

is the clutch aligned right?

 

Man, you have more issues with your car...

 

I use the clutch alignment tool. Unless that **** is fucked up,I think it's line up right.

 

The alignment tool is used so you can stick the transmission the first time. That has nothing to do with the problem your describing. If you have pedal pressure, you either have air in the lines, a faulty slave or master cylinder, or the pedal is not properly adjusted. If I were you, I would bleed the lines just to be sure that's not the problem.

 

I will try to readjust the clutch pedal height and bleed the line.

 

Can't you just get someone to push the clutch pedal while you watch the slave cylinder arm? That will help you begin to narrow things down and is an easy first step.

 

I got someone to push the clutch pedal and I was looking at the slave cylinder and I can see it moving. Also I bleed the line from the clutch slave cylinder and that didn't help. Also try to put in 5th gear when running and it didn't do anything,but the rpm did drop maybe a hundred or less.

 

The clutch master cylinder and slave has been replaced about 6 months ago with oem factory unit. I don't see any fluid leaking and clutch MC is full of fluid.

 

It could be that the slave is not moveing the fork enough to disengauge the clutch. When I did my clutch I acually had to use a longer shaft for the connection between the slave and fork.

 

So what you suggest? Take the slave apart and put it back together or rebuild? It's not leaking though.

 

last engine swap we did i saw a slave go back together slightly crooked, the push rod part. it wouldn't come out after that pushing the clutch pedal. pulled the slave off, removed the boot, pulled the pushrod to straighten it out. put it back together, it was all good. so check you slave for binding

 

Did you have the same problem as this? It goes in gears when the car is not running, but it doesn't go in gear when it's running. Seems like a slave or master clutch cylinder, but those were replaced and I'm not sure. I will take the slave a part and see.

 

dude, under the dash ... get down there and look at the pedal. You are going to see a rod that physically pushes into the master cylinder through the firewall (sorta like a ***** i guess). Well you just gotta adjust it's nuts so that it pushes in further.