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Thread: Trans Cooler, what did you do?

  1. #1
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    Trans Cooler, what did you do?

    Automatic 700R4, what did you guys do for a trans cooler? Anyone use a remote cooler with a fan? Where did you mount it and how?

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    I plan to use the internal cooler in the radiator, as it maintains the perfect 200 degree operating temperature. External coolers and fans just seem to add complexity, and they actually can over cool the ATF on less than hot days.

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    Senior Member Mastertech5's Avatar
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    Just use the built in cooler in the radiator. Remote coolers are generally only needed for towing, racing or heavy duty use.
    33 Hot Rod Stage 1, Gen.2 ordered 11/11/2021 started June 12, 2022, LS3 E-Rod crate engine, Tremec TKX, 8.8 WITH 3.55 Ratio and limited slip with 31 spline axles.17X8 and18x10 Race Star wheels wrapped in Conti Extreme contact DWS tires, Mustang Cobra brakes all around. Electric PS and AC. Hard top, electric windows and bike fenders. First Start 5/31/2023. Go-Kart 6/2/2023.

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    If you live in the Southwest or other hot locations you may want one.
    I picked up a tranny cooler off a Suburban at the local junkyard for $7.
    It’s mounted to the frame rail with a switch so I can turn the fan on when it’s needed.
    It’s plumbed in after the radiator cooling loop.
    '33 Hotrod, #1047 Gen 1, delivered on 2/27/18, go cart on 9/24/18.
    LS3 w/Gearstar Level 3 4L65e Tranny, Yank converter, Lokar shifter, Electric PS, Vintage AC/Heat/Def, 8.8" 3.55
    TorqThrust II Wheels w/Toyo Proxy T1 Sport Tires, F 235/45ZR17 R 295/35ZR18
    Garage Built, Driveway Painted.

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    Junior Member proeagles's Avatar
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    While I agree with using the radiator, Bowler transmission requires an external oil cooler for my 700R4 I'm installing in my 57 Chevy for warranty purposes. Just a thought.

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    Quote Originally Posted by proeagles View Post
    While I agree with using the radiator, Bowler transmission requires an external oil cooler for my 700R4 I'm installing in my 57 Chevy for warranty purposes. Just a thought.
    Same here, I was told to by my trans builder to definitely add an external cooler.

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    Senior Member Mastertech5's Avatar
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    If it's a warranty issue then add an external. Peace of mind in a good thing.
    33 Hot Rod Stage 1, Gen.2 ordered 11/11/2021 started June 12, 2022, LS3 E-Rod crate engine, Tremec TKX, 8.8 WITH 3.55 Ratio and limited slip with 31 spline axles.17X8 and18x10 Race Star wheels wrapped in Conti Extreme contact DWS tires, Mustang Cobra brakes all around. Electric PS and AC. Hard top, electric windows and bike fenders. First Start 5/31/2023. Go-Kart 6/2/2023.

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    Senior Member edwardb's Avatar
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    Truck build here, so not 100% applicable. But I found it was impossible to have both an A/C condenser and the radiator cooler in the grille area for my Gearstar/GM 4L65E. I installed a Derale Cooling Products 13950 powered unit under the bed in the back. It's not that big and suspect something like that would work with the hot rod if necessary. Important to decide early in the build because it obviously affects routing of the cooling lines, among other things.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014. Build 2: Mk4 Roadster #7750. Sold 04/10/2017. Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. Sold 09/07/2020. Build Thread and Video. Build 4: Gen 3 Type 65 Coupe #59. Gen 3 Coyote. Legal 03/04/2020. Build Thread and Video
    Build 5: 35 Hot Rod Truck #138. LS3 and 4L65E auto. Rcvd 01/05/2021. Legal 04/20/2023. Build Thread. Sold 11/9/2023.

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    Quote Originally Posted by edwardb View Post
    Truck build here, so not 100% applicable. But I found it was impossible to have both an A/C condenser and the radiator cooler in the grille area for my Gearstar/GM 4L65E. I installed a Derale Cooling Products 13950 powered unit under the bed in the back. It's not that big and suspect something like that would work with the hot rod if necessary. Important to decide early in the build because it obviously affects routing of the cooling lines, among other things.
    I looked at a bunch of those and if I go that route i'll do the Perma Cool 13211 for it's lower profile. https://www.amazon.com/Perma-Cool-13.../dp/B07BTPWSPM

  12. #10
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    If you are using the 32 radiator and shell the radiator does not provide for a transmission cooler connection (at least mine didn't). I purchased a small transmission cooler and mounted underneath near the rear end in the airstream. Never had any heat problems.

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    Update on this, I used a Derale 13401 and plumbed it in line with the radiator trans cooler.
    20230729_133125.jpg20230723_181029.jpg20230723_181022.jpg

  14. #12
    Senior Member Mastertech5's Avatar
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    Nice job!

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    Consummate Learner TxMike64's Avatar
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    Very nice install!
    -- Mike -- TxMike64 -- @TxMGarage
    Gen1.5 Hot Rod '33 #1094 (Stage 1) - 302/AOD '15 IRS - Quad Built - Build Thread

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    Check out one of these https://www.summitracing.com/parts/sum-331000?rrec=true they are made specifically for use in small spaces

  19. #15
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    Quote Originally Posted by Ford & Jeep Fan View Post
    Check out one of these https://www.summitracing.com/parts/sum-331000?rrec=true they are made specifically for use in small spaces
    Tried one of those, didn't work for what I wanted.

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