5 speed problem

[BLB4000]

1995 mazda B4000
5 speed manual

Trans. was'nt shifting rihght found out clutch fluid res. was empty.

Took it to garage where they bled the sytem and changed trans fluid.Could not find leak.

Everything ok for 2 days. Then it started again.

Won't shift into 1st gear especially you half to push it hard in.

Replaced master cylinder cause it was leaking and had a heck of a time bleeding it.

Ok for 1 day, now it won't even shift at all, clutch is almost non existant.

Do I still have air in the lines or something more serious ?

I'd hate to drop the trans.

 

[Wicked_Sludge]

its nearly impossible to fully bleed the master cylinder with it installed in the truck due to the angle is rests at. its best to bench bleed it before installation...but since its already in, id unbolt it and flip it upside down (hard line at the top) and try re-bleeding the whole system.

if that doesnt work, you may have a failing slave cylinder.

 

[Hahnsb2]

Sounds like the slave died. I've found the best way to bleed is to take a 2oz syringe, pull the line off the res and hook it to the syringe, fill it with fluid, open bleeder and force the fluid through and close the bleeder and hook up the res and fill it. This has worked the first time everytime I've done it (well, first time when all the parts are good and not leaking) including after installing a brand new master without becnh bleeding it.

 

[BLB4000]

The truck leaked oil and ran the master cylinder dry.

I found out the master was leaking, garage missed it.

I changed the master cylinder and now have a good clutch 1 day then have to bleed it again because I have no clutch pressure hardly the next.

I'm going to try it with a turkey baster instead of a syringe and see if that works.
If this does"nt work it's going to the garage to get bled.

A different garage then the first time.

Thanks for the replies.

 

[Hahnsb2]

If it had pressure and now it doesn't something is leaking! It doesn't just "un-bleed" itself.

 

[V8RangerBoy]

Slave cylinder. I had the same problem a few months back. The truck got more and more difficult to go into first/second, and it would grind a little going into reverse. Finally, I had no pedal and bleeding did NOTHING.

Your slave doesn't sound completely toasted, but it won't be long before you have no more clutch pedal. Like Hahns said, the system shouldn't be "un-bleeding" itself. You have a leak somewhere in there!

 

[rboyer]

I had a slave cylinder act like that for about a year before it finally died in the middle of winter when I had my garage packed full of four wheelers. Unfortunately you probably have the same problem which means removal of the tranny to get to the slave cylinder. Removing your Y-pipe will help you with the transmission removal/installation, but as with any used exhaust may create another problem for you. There is definitely enough room for the tranny to get past it but it's kinda hard. If you do mange to get it out with the Y-pipe on, i've seen some trucks in my area where people hammered in the little metal seam above the transmission prior to installation to gain that extra 1/4 inch.

 

[BLB4000]

Well I used the syringe method, but I used a turkey baster instead.

Got alot of air out of it and it shifts like a new trans. now.

It's been great for 3 days now and it only ever lasted 1 day before I had to bleed it again.

Thanks for the replies and the bleeding technique.