4L60 cooling lines

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howso48
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4L60 cooling lines

Post by howso48 »

Can any body tell me which is the Hi pressure and low press side of the cooling lines at the transmission???? of the 4L60 transmission in my 97 Astro 8-[
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MrJames
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Re: 4L60 cooling lines

Post by MrJames »

Unless I am mistaken, the lower connection is the cooler feed, and the upper connection is the return.

I believe that GM had 4L60E's in the 1996 and up vehicles.

LiftedAWDAstro
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Re: 4L60 cooling lines

Post by LiftedAWDAstro »

That is true at the radiator cooler. I would have to go to the garage to open the FSM and see what line is in and out at the trans. You could follow the lines from the cooler back. The top is the return back to trans.
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

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Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy
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