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4T60-E Trans Cooler Supply

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  • #1

    Question : 4T60-E Trans Cooler Supply

    Does anyone know which line is the supply for the factory trans cooler?? I am adding a external cooler to the factory and i am going to use the factory one first then the external one then back to the trans.. Im not sure which one is the supply though.. The top or bottom line on the radiator??
    Thanks
    Robert
    ---------------------------------------------------
    96 Grand Prix SE 3100 202,000 miles
    New Rebuilt 3100
    New Rebuilt 4T60-E
    Exhaust
    Drilled/Slotted Rotors

    95 Grand Prix GTP 177,000 miles
    White
    3" Magnaflow Catback
    Lowered 2" Eibach in front Brichmount Rear
    94-96 Hi-Po 5 Stars on 245/50/16

    90 Pontiac Turbo Grand Prix
    5 Speed Swapped
    127,000
    Spec Stage 3 Clutch
    230,000 mile Getrag 282
    Emissions Deleted
    Brand new Engine 1,000 Miles
    Fully Custom Built car
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  • #2
    not positive here, but i tend to think that gm would want to eliminate all air in the cooler lines. since air rises it's only logical to have the bottom line supply fluid forcing the air up and out of the cooler.
    Andy

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    fastest 1/8: 10.19@ 67.17
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    62mm TB, 1.6 roller tip rockers, Ostrich 2.0, UD pulley, TB heater bypass, K&N, 180* stat, No cat, 99Grand AM dual cooling fans. 4T65E swap FDR 3.69, EP LSD, F.A.S.T. transmission controller, TransGo shift kit.

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    • #3
      I think its top to bottom not sure... BUT coming out of the trans the vertical fitting is the supply the horizontal fitting is the return... trace them back from there.

      Got Lope?
      3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
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      Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
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      • #4
        Yep That was the one! i added the aftermarket cooler with the factory one and the fluid is way cooler then before!!! There is a noticable difference when you touch the inlet and outlet of the lines... Definatly the way to go if you want to perserve the life of your trans...
        Robert
        ---------------------------------------------------
        96 Grand Prix SE 3100 202,000 miles
        New Rebuilt 3100
        New Rebuilt 4T60-E
        Exhaust
        Drilled/Slotted Rotors

        95 Grand Prix GTP 177,000 miles
        White
        3" Magnaflow Catback
        Lowered 2" Eibach in front Brichmount Rear
        94-96 Hi-Po 5 Stars on 245/50/16

        90 Pontiac Turbo Grand Prix
        5 Speed Swapped
        127,000
        Spec Stage 3 Clutch
        230,000 mile Getrag 282
        Emissions Deleted
        Brand new Engine 1,000 Miles
        Fully Custom Built car

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        • #5
          I've had two 3100/4T60E's that would not drop into Overdrive on the highway, sporadically. After adding the external coolers, they both drop into OD everytime.
          One I have going to the external cooler first and the other I have the lines routed to the radiator's cooler first. I see no discernable difference in the shifting.
          I bought a new transcooler off Ebay that doesn't flow when cold. That makes sense. It has stackable plates. The other cooler I pulled off of a 93 Pull-A-Part Regal. Same design and much cheaper.

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