Coolant in transmission fluid from failed radiator

1995 CHEVROLET TAHOE
50,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
Avatar
JEFFERY JAMES
  • MEMBER
  • 2 POSTS
Radiator failed allowing engine coolant to enter transmission. I have replaced radiator and flushed the transmission twice and I am still getting some slippage. Help!
Oct 15, 2017 at 6:14 PM
Advertisement
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Once coolant gets into the transmission oil you just cannot flush it out, it will affect seals and clutch linings. i feel that the only real solution is transmission out and total strip and re-build. the slipping if allowed to continue will just get worse and cause more damage.
Oct 15, 2017 at 9:26 PM
Avatar
JEFFERY JAMES
  • MEMBER
  • 2 POSTS
Thank you for the quick reply MHPAUTOS. At cold start up, the transmission works great for about five minutes. Is it building up excessive pressure and causing the slippage? Why would it not slip right from the start?
Oct 16, 2017 at 3:35 AM
Avatar
MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
Cold plate grips better as the system heats up friction loss due to the contamination on the plates and discs start to take effect, it is a bit of a snow ball down hill thing.
Oct 16, 2017 at 4:25 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.