Coolant in transmission fluid from failed radiator

JEFFERY JAMES

MEMBER
1995 CHEVROLET TAHOE
5.7L
V8
4WD
AUTOMATIC
50,000 MILES

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!

Sunday, October 15th, 2017 AT 6:14 PM

3 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

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.

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Sunday, October 15th, 2017 AT 9:26 PM

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?

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Monday, October 16th, 2017 AT 3:35 AM

MHPAUTOS

MECHANIC
31,937 POSTS

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.

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Monday, October 16th, 2017 AT 4:25 AM