Return/feed lines on a 700R4
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Supreme Member
Joined: Jan 2003
Posts: 1,786
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From: Paxton, MA
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42
Return/feed lines on a 700R4
Hey guys, i will be installing my tranny cooler within a couple of weeks, and i am wondering which line (going into the radiator) is the tranny fluid return/feed. I assume the bottom one if the return line, but correct me if i'm wrong.
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Joined: Feb 2006
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From: Knoxville, Iowa
Car: 1988 Trans Am GTA Black with Black Cloth Interior
Engine: Supercharged 355 Lingenfelter, TPIS/AFR Heads
Transmission: Street Strip 700 Turbo with 3000 stall converter
top on the trans is the return
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From: Nanticoke, Pa
Car: 89 Firebird
Engine: 406 CI
Transmission: Pete K 700R4
Axle/Gears: 3:55
If in doubt, take the car for a ride and drive it hard. Pop the hood and feel the 2 lines. The cooler of the 2 is the return.
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Supreme Member
Joined: Jan 2003
Posts: 1,786
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From: Paxton, MA
Car: 1987 Camaro Z28
Engine: 335 TPI Stroker
Transmission: Tremec TKO 500
Axle/Gears: 10 bolt / 3.42
Originally posted by 88outlawGTA
top on the trans is the return
top on the trans is the return
Joined: Jan 2007
Posts: 43
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From: Oakland County, MI
Car: '87 Camaro
Engine: 4.3L V6
Transmission: T5
Axle/Gears: 3.08
Re: Return/feed lines on a 700R4
Can someone else confirm this? I am also installing an aux cooler and it won't work good if it's backwords.
Thanks
Thanks
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
Re: Return/feed lines on a 700R4
The bottom line takes fluid from the transmission to the rad. The top line takes fluid from the rad to the transmission.
If you ask enough people where to install an auxiliary transmission cooler, 1/3 will tell you to install it in the supply line, 1/3 will tell you to install it in the return line, and 1/3 will tell you to skip the factory cooler altogether and just use the auxiliary.
If you ask enough people where to install an auxiliary transmission cooler, 1/3 will tell you to install it in the supply line, 1/3 will tell you to install it in the return line, and 1/3 will tell you to skip the factory cooler altogether and just use the auxiliary.
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