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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | Joined: Nov 2005 Posts: 1,554 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 1,554 | I am about to run trans cooler lines, can I run solid lines all the way or do I need to have a flex in there some place? Th400 with 350 in a 46. Dave
1941 Chevy"First rebuild - complete!"Follow the story in the DITY1941 GMC resting peacefully 1946/1947 Chevy Street rod on s10 frame complete 1945 GMC panel truck in line for restoration 1941 Plymouth stock complete 1941 GMC COE in restoration processRead his Project Journal1941 Chevy Coe uncertain future resting now
| | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | Most factory coolers run solid steel tubing lines, but if you want to add a short piece of flex line between the trans and the body it will avoid getting stress cracks at the flare fittings. Just be sure the flex line is rated for carrying hot oil somewhere in the 250 degree range, as trans fluid can get pretty hot on a hard pull.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Apr 2005 Posts: 177 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 177 | if you are going to the frame with the cooler i would put in a rubber line. | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | There is enough flex in the line, but I always run a short piece of rubber line just to be safe. Anywhere your steel line could rub on something, split a piece of rubber line and wrap your steel line with it, then use a zip tie to keep it there. Or if it's a sheetmetal edge, put the rubber hose over the sheet metal. | | | | | Joined: Jun 2005 Posts: 1,001 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 1,001 | homer52, what size trans cooler are you using, 18"?
I'm needing to put one in my 41 3/4ton, 350/700r4, and don't know how to size one. I will be using it as a "truck"; carrying at least one ton.
~ Victor 1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD 1957 3100 - moved on 1959 C4500 Short Bus "Magic Bus" - moved on 1959 G3800 1 Ton Dually "Chief" - moved on 1958 C4400 Viking "Thor" ~ moved on to fellow Bolter | | | | | Joined: Feb 2004 Posts: 29,771 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,771 | It's difficult to "over-cool" a working transmission. I use the biggest one that will fit the space I have available. On some really hard-working rigs like a vehicle that will tow a big camping trailer often, I have used an entire air conditioner condenser as a trans cooler, but that's probably a little overkill.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Nov 2005 Posts: 1,554 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 1,554 | I got a new aluminum rad and it has a trans cooler section in it.
1941 Chevy"First rebuild - complete!"Follow the story in the DITY1941 GMC resting peacefully 1946/1947 Chevy Street rod on s10 frame complete 1945 GMC panel truck in line for restoration 1941 Plymouth stock complete 1941 GMC COE in restoration processRead his Project Journal1941 Chevy Coe uncertain future resting now
| | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | I got a new aluminum rad and it has a trans cooler section in it. The coolers in the rads are fine for street use in cooler climates. For those planning on towing or heavier usage or are in a hot climate, you're better off with an auxiliary cooler. | | | | | Joined: Jun 2005 Posts: 1,001 'Bolter | | 'Bolter Joined: Jun 2005 Posts: 1,001 | I plan on using my original radiator. So whatever cooler I install will be the only one. Just want to make sure it will be sufficient.
~ Victor 1941 3/4-Ton Pickup (in process). Read about it in the DITY Gallery1955 Grumman Kurbside "Doughboy" 235/3 on tree w/ OD 1957 3100 - moved on 1959 C4500 Short Bus "Magic Bus" - moved on 1959 G3800 1 Ton Dually "Chief" - moved on 1958 C4400 Viking "Thor" ~ moved on to fellow Bolter | | |
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