Tranny Problems Again

[SMOKD U]

Here is the deal, it shifts fine but with full throttle its leaking fluid from the rear, its not the seal from the driveshaft and its not comming from the bell housing. it seams to be leaking out the weep hole but why would this be. it's hard to tell exactly where its comming from but it's bad enough to blow smoke and oil off the pipes. under normal driving it does not seem to leak ?. im afraid to call the tranny guy because of all the problems i have had with them. what should i do? this is not a good thing and i wanted to race at gld thursday night. its a C4 TRANS. anyone else ever have this problem? again it only leaks real bad at like 4000k to 5k full throttle driving. if i leave sitting and clean it off no leaks but if a bag it. smoke show. any good tranny place's around here?

[Jim]

what dan said.

mine does that, i saw eric's do it, and chuck's do it.

best solution, if that is the problem, is to run a hose from the vent into a catch can.

[SMOKD U]

well it never did it before thats why im thinking it's more than that? ehat else could leak back there on the neck?

[NitrousEdge]

what dan said.

mine does that, i saw eric's do it, and chuck's do it.

best solution, if that is the problem, is to run a hose from the vent into a catch can.

Jim and Dan are exactly right.

Put a catch can on it and go race! :thud:

[SMOKD U]

why has this not done it before? and how do i know this is the problem for sure? if this was the case you would think that tracks would make catch cans mandt?
with so many problems i have had im just worried. what else could it be if that was not the problem. any others think this was it to find more stuff wrong

[SMOKD U]

do they make one for a C4 and who can install it for me?. do tracks make you have one on these tranny's? you would think getting oil on your rear tires could get bad at 124 mph

[NitrousEdge]

Mine blew so much smoke you'd think I blew the motor out of the frickin hood - a few times they had to check the track it looked so bad...

I just took a 1/8*4an 90 an pounded it in and ran a braided line to a can in the trunk...

I would think any shop can do it for you, it simple...

[SMOKD U]

i was testing my gtech and i thought i blew a head gasket or the motor. it was like white smoke all over. so do we all think this is the problem? thx guys makes me feel alot better.can you put the catch can on without removing the trans. our shop is booked up this week does anyone have a place that i can confirm my worst thoughts and make me feel better? woiuld like to race thursday night. ps ran 97 mph in the 1/8th shifting at 4800 to 5000k with my gtech today. without nitrous and two pounds less boost.

[SMOKD U]

why do they do this anyway?
ps im still not sure thats the problem but you guys are making me feel better anyway. just seems like it leaked out a lot of oil in a short time

[1slo5.0]

If its leaking from the vent, its probably overfilled. Where is the fluid level on the dipstick? Is it a stock dipstick? Is it a stock transpan?

[markstang]

i was testing my gtech and i thought i blew a head gasket or the motor. it was like white smoke all over. so do we all think this is the problem? thx guys makes me feel alot better.can you put the catch can on without removing the trans. our shop is booked up this week does anyone have a place that i can confirm my worst thoughts and make me feel better? woiuld like to race thursday night. ps ran 97 mph in the 1/8th shifting at 4800 to 5000k with my gtech today. without nitrous and two pounds less boost.



maybe after a bunch of gtech test runs, the fluid got hotter than normal & expanded more or was getting pushed to the back of the trans & couldn't drain back into the pan. my .02 cents.... see you at the RSD :thumbs_up
Fast Times can help you out. & you can go for lunch across the street, when they work on it. :D


Mark

[Jim]

maybe after a bunch of gtech test runs, the fluid got hotter than normal & expanded more or was getting pushed to the back of the trans & couldn't drain back into the pan. my .02 cents.... see you at the RSD :thumbs_up
Fast Times can help you out. & you can go for lunch across the street, when they work on it. :D


Mark
markstang is probably right here. chucks didn't start smoking/blowing out the vent real bad until he sprayed it. then it looked like a smoke show.

[upngo50]

Check the big round plates on the side. Those are covers for the servos and I have had the rubber o ring blow on those lots of times. Vent tube sounds like a definite posibility, but if the leak is coming from the side and not the top then add high speed, that trans fluid will spray all over. I have had both situations happen on my TCI C4. Check you fluid level, is it overfull? If it is coming out the vent on top there will be fluid on the top of the trans and all over the floor of the car. If it isn't then I would look to see what area is the wettest. Check around those round covers to see if it looks like it is seeping there including around the bolts. Easy fix. Easy check even. Loosen the four bolts, but don't take them all the way out yet. Let the servo disk push the cover out and check to see if the o ring around the cover is torn. Good luck, hope it is something simple like a vent issue or poor ring.

[drag79stang]

My c4 has done it ever since I started 'utilizing' a C4 for HARDCORE usage.
I drilled/tapped vent hole, put a 90' degree fitting in it, ran copper line up behind the intake, and put a 'sock/fluid holder' on it. Gotta change it after every weekend out, but no more mess.
Also, if you overfill your trans, it will do it WORSE.

Don't know why the C4s do it, with normal beating on it, it's fine, but run 'em hard at the track, (or street I would imagine), and they'll blow hardcore out the vent.

Good luck, have fun.

(been there, done that).

[MAT88GT]

lol....yeah its completely normal to have fluid spew out of the vent... :)

Other things to check:
dipstick to case seal, c4's love to leak at that point
pan seal
servo covers
tailhousing to case seal
front pump seal, if you ever have the trans out be sure to lube the seal and converter snout!


Does your cooler sit horizontally? I had issues with fluid running back from the cooler after the engine was off...it'd dump excess fluid back into the pan and leak out the dipstick hole

c4's are too damn finicky with fluid, but they work wonders :)

[upngo50]

lol....yeah its completely normal to have fluid spew out of the vent... :)

c4's are too damn finicky with fluid, but they work wonders :)

I second that............

[SMOKD U]

well the dip stick cover locks on. the oil was at the top of the stick after the leak. im goint to let paul at best ford look at tonight. i hope i ca get it fixed for rsd. i also talked to the guys in germantown (automatic trans design think it might be the pump) i hope not

[BBATCO1]

The problem is line pressure. Ie; to much of it. There aren't many C-4 builders that can build one right, I can tell you that first hand. Most companys valve bodys jack up the line pressure in order to get them to shift firmly, thus leading to your vent issue. Sometimes they will leak from all of the seals. I personally have found that only Dynamics valve bodys work properly in this issue.(no vent spray, or 3rd flare-up) They are engineered to shift right without the crazy pressure, they only run between 180-200 psi Where as most are much higher. You have a billit servo? you will need it They invented that so when you jack the pressure up so high it would break the stock one.......I would have your line pressure checked first, the catch can is an old school band-aid from a time when a good valve body could not be had. And if pressure is the problem pull it out and have it built right.......

[SMOKD U]

i think you are right i do not know about these guys at tsi. i think all the above is true but i do not want to believe it. on the test drive the day i picked it up it leaked after he used the trans break and he told me that was normal. ya right im so pissed at these guys if this is true. whats the flare up you mean? because if felt like it was slipping in third also. but did not slip later than night when i tried it again, but i still had a bad oil leak. how much for that valve body and where do i get it. plus any suggestions on who should do the work. im done with TSI four times your out.. should have been out after 2 but i was in a tight spot with no tranny and was for sure not going to put in there aod with i also felt had to much line pressure, but this is just my opinion, I bet we are right.

[MAT88GT]

I've had good luck with my PA valvebody, and so has Gene with the flashback

[BBATCO1]

PA makes good stuff I hear. I have delt with Dynamic for a while now and I could'nt be happier. They dyno test every trans to check pressures and such. I would yank it your self give them a call and ship it to them. They will send the truck for it if you need its about $90 each way but well worth it. They will hook you up with what you need. I have tried severall local places to freshen up my trans but have had more problems than the shipping cost by far.... The C-4s are a little tricky but when they are done right you will be VERY happy......Dynamic racing transmissions1-(203)315-0138

[dave bandt]

I don't think i'd pull the tranny just yet. As most of the people on here have said....it's quite normal for them to leak out of the vent.

I'm sorry to hear that you're still having tanny problems. PA and Dynamic would be the ONLY heavy duty C4 manufacturers i would trust.