Q: Th350 transmission leaks out of thr vent. On 1977 chevy k10

asked by on

I just had my th350 transmission rebuily. I put it back in filled it up the correct way went and put it through the gears then started to back up and transmission fluid started leaking out of the vent hole. ( I have the granny tunnel off so I can watch it happen ) it only leaks in reverse. I tried taking fluid out but then it wouldn't drive right and it still leaked. I drained as much as I could the slowly refilled it but it still leaks out of the vent in reverse. I have searched the internet and can't find anything. I'm about to talk to the guy ego rebuilt the tranny. I really don't want to pull it again. My question I guess is why is my th350 leaking out of the vent??? Its not over filled.
My car has an automatic transmission.

It sounds like it may have originally been over filled. Fill 4-5 quarts, then start the truck and then slowly fill up the remaining fluid. This should keep it from leaking from the vent hole.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Th350 transmission leaks out of thr vent. On 1977 chevy k10

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuel pump 1977 Oldsmobile Cutlass

Hello - you are correct, there will not be an additional fuel pump in the gas tank, only the mechanical pump at the engine. Check first to see if the fuel pump is pulling fuel from the tank, and pushing...

Q: At low speeds, I hear a metallic thump/cluck sound when turning into a driveway or parking lots. 2014 Ram 1500, 4x4

Claimed by Jeff Engstrom

Q: Check Engine Light on code P3400 showing

Hello. This particular code indicates a performance issue with the cylinder deactivation system on bank 1. If you believe that all of the recent repairs are holding, then you may want to turn your attention the the solenoid and sensor...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.