Weird transmission problem...

Hey everyone. My name is Chris. I have a weird problem with my transmission that I've never come across before. I own a 1996 Chevy Blazer with the 4.3L engine and I'm not sure if that vintage used either the 700R4 or the 4L60 transmission...but, the problem I am having, is that I notice that the breather has quite a bit of trans. fluid that is soaked up the square foam piece at the top and it seems that the fluid is now making it's way down to the exhaust and is burning it on the pipes. I thought I would "limp" it home 10 miles from my place and before I did that, I thought I would check the fluid and I was a pint low, so I topped it off and was on my way. I thought I might as well leave the trans. in Drive and not in Overdrive, being that the torqueconverter wasn't locking up to save on the heat. But, on my way home, I thought I should shift it into OD and see if the t/c was locking up, but when I tapped the brake to see if it did indeed shift out, I didn't notice anything...if it was unlocking, I couldn't feel it. So, I shifted it back out of OD. The whole way home, I could smell burning trans. fluid on the exhuast and I lost (again) about a pint of fluid. If SOMEONE could help me out and give a responce or ask more questions, it would greatly be appreciated. Thanks again. :banghead:

Have you had any service done lately to the transmission?

How are you checking the fluid level?

after searching i found this post i'm having the same problem only not with shifting only with the breather spewing out tranny fluid its only happened since it got warmer. I check it by shifting it into D then N,R,then back through again i'm not overfilling that i can tell plusit only started since it got warm could anyone respond I would appreciate it

Where is the fluid spewing out of?

Are you checking the fluid with the transmission running in park?

fluid is coming from breather tube connected to the dipstick/filler tube i've been ckecking the fluid in nuetral

Almost sounds like a clogged filter.

fluid is coming from breather tube connected to the dipstick/filler tube i've been ckecking the fluid in nuetral

Go through all the gears holding in each gear for 3 seconds all the way down to 1 and back up to park.

Check the fluid in park.

Do you have a tranny cooler?

yes i have a tranny cooler,
after checking in park i was low 1 quart ok now how did it get low and last summer i had it overheat so i installed the cooler and haven't had any problems till now when it gets warmer again.

new filter on last summer at the same time as the cooler

yes i have a tranny cooler,
after checking in park i was low 1 quart ok now how did it get low and last summer i had it overheat so i installed the cooler and haven't had any problems till now when it gets warmer again.

The fluid must've been spit up through the fill tube.

I think there is a vent on the transmission.

Can anyone back that up?

I am having the same problem with my tranny (95 blazer). I asked Eagle transmissions in syracuse,NY and they told me it could be one of two problems. 1. broken internal part. or 2. pump is not pumping fluid and fluid is overheating.

I am having the same problem with my tranny (95 blazer). I asked Eagle transmissions in syracuse,NY and they told me it could be one of two problems. 1. broken internal part. or 2. pump is not pumping fluid and fluid is overheating.

I rebuilt the tranny in my 88 blazer a while back. Rebuild kit was only $125. BUT....I had to replace the pump. You'd prolly be better off replacing the whole tranny if it is the pump. The pump alone cost $850 from the dealer. Guy at the dealer told me he could sell me a complete "remanufactured" tranny with 50k warranty for $1150. $300 more for the complete tranny with a new pump than for just the pump alone. Outrageous huh. Needless to say I didn't buy one from the dealer. Got a rebuilt one (which I don't know how you can call it "rebuilt" cause there is hardly anything to rebuild) from a local repair shop for $120

I had the same problem with my trans in my 93. I was told it was that the pump in the trans was worn out. I still used the truck with it leaking for like 4 months. Then I needed it to tow a project car home, I changed the trans filter with a filter from fram and did a full fuild change before I left. After a 2000 mile trip (1000 miles towing a car), It didn't leak once. Check your t-case fuild, mine was over full like the trans was leaking into the t-case (the vent for the trans and the vent for the t-case are connected together). Change your filter and check your fuild levels first, then see.

Hey Guys Check your transfercase fuild level I bet its over full! the input seal on the transfer case goes bad and lets fuild get into the transfer case pull the T-case and replace the seal.

I've noticed the same thing happening to my 97 LS 120K Trans fluid still looks good, but I want todo a complete service. How do I get all of the fluid out of the tranny when I do the filter change. and how much does the tranny take to fill it up?

thanks
JKdon

Check out this link... http://www.sonnax.com/bulletins/tech/TS-BW-699.pdf It discusses some common 4L60-E valve body issues that can lead to improper torque converter clutch operation which in turn causes overheating which will cause the fluid to come out of the dipstick tube or breather. The same company (Sonnax) offers some fix kits for the valve wear issues that lead to this problem. Hope this helps.

I've noticed the same thing happening to my 97 LS 120K Trans fluid still looks good, but I want todo a complete service. How do I get all of the fluid out of the tranny when I do the filter change. and how much does the tranny take to fill it up?

thanks
JKdon

The only way to completely get all the fluid out of the tranny including the torque converter is 1 of 2 ways. Unbolt the trany from the engine to remove the torqe converter (which is basicly removing the tranny), or have it flushed at a service shop which is alot easier. Dropping the pan only removes aprox. 5 quarts of fluid. The total capacity of the trany is just under 14 quarts.