Transmission trouble! Need help!

Jbragg91 · August 21, 2015

I have a 1991 chevy silverado c1500 5.7 V8. It was shifting later than normal, sometime last week so I checked the fluid and it was low by 2 quarts. I added a quart of fluid and a quart of Lucas transmission something or rather(supposed to smooth out shifts) ran great the 30 miles home. Thought I Had taken care if the problem. My ol lady goes to drive it this Tuesday says it's loud and smoking....

I took it around the block when I got home and indeed it was not shifting up out of 1st and it was smoking. Looks like tranny fluid coming out of the vent tube and onto the cat causing the smoking. It looked as if it was 2 quarts too high when I checked it.

I bought a hand pump siphon and siphoned about a quart out. Still the same issues.

Can someone help me out? Hoping I can fix her fairly inexpensively.

Would a clogged filter do this? Is it just overfilled? Or is the tranny shot?

Silverado4x4 · August 22, 2015

I have a 1991 chevy silverado c1500 5.7 V8. It was shifting later than normal, sometime last week so I checked the fluid and it was low by 2 quarts. I added a quart of fluid and a quart of Lucas transmission something or rather(supposed to smooth out shifts) ran great the 30 miles home. Thought I Had taken care if the problem. My ol lady goes to drive it this Tuesday says it's loud and smoking....

I took it around the block when I got home and indeed it was not shifting up out of 1st and it was smoking. Looks like tranny fluid coming out of the vent tube and onto the cat causing the smoking. It looked as if it was 2 quarts too high when I checked it.

I bought a hand pump siphon and siphoned about a quart out. Still the same issues.

Can someone help me out? Hoping I can fix her fairly inexpensively.

Would a clogged filter do this? Is it just overfilled? Or is the tranny shot?

You do know if the trans fluid shows low on the dipstick you add a pint not quarts, if you did add quarts you did a major overfill. No wonder its blowing out the vent tube.

You check the fluid level on level ground in park motor running and warm if the fluid is on the add mark you add a PINT not a quart. 1 Quart is equal to 2 pints.