Tranny Cooler.....
Thread Starter
Burning Brakes
Joined: Feb 2004
Posts: 1,136
Likes: 0
From: San Jose Ca
Tranny Cooler.....
I'm going to install a B&M Tranny cooler on my C5....What goes to what???as far as the lines being spliced from the radiator?? What is the location of the line or lines I need to splice into?? Thanks, Phil.. 
Melting Slicks
Joined: Jun 2005
Posts: 3,088
Likes: 61
From: NY- 2013 Corvette Challenge Champion-2013 Index Combo Champion 2015 CC/MM Champion
St. Jude Donor '07
I think you have to use the top line in the radiator(pass. side)One line from the cooler goes to the radiator.And the other line from the cooler goes to the line you took out of the radiator.Hope that helps,maybe someone else will chime in.
Its the top line you want and mine dropped 40 degrees. 
Drifting
Joined: Feb 1999
Posts: 1,768
Likes: 33
From: Bradenton Florida
Which exact cooler did you buy? Part number please 
The one with AN fittings or barbed. I have to purchase a cooler as well. Running a Yank ss3600 with 3.73's in the SW Florida heat. 90's 10 months out of the year.
Thanks
Dennis
The one with AN fittings or barbed. I have to purchase a cooler as well. Running a Yank ss3600 with 3.73's in the SW Florida heat. 90's 10 months out of the year.
Thanks
Dennis
Safety Car
Joined: Jul 2005
Posts: 4,275
Likes: 4
From: Vancouver WA
I didn't write this, but I found it a while back and saved it.
Many people like the B&M 70264 (14,400 BTU 6x11x1.5), which is sometimes referred to as a 24,000 GVW cooler. Summit’s # is BMM-70264. It includes hoses, clamps, and adapters as well as everything you need to mount the cooler. If you prefer to use AN fittings and stainless steel braided hose then get the B&M 70273. Summits # is BMM-70273 and it doesn’t come with an installation kit.
A lot of people prefer the larger B&M 70270 (8x11x1.5) to drop temps down more. Summit’s # is BMM-70270 and it comes with the same installation kit as the 70264. For use with braided lines the Summit # is BMM-70266. I use the #70297 for extra insurance on a road course in the summer heat.
If you want to use braided lines you’ll need Summit’s SUM-G4990 mounting kit and these additional parts:
Note: Summit puts a prefix in front of the number (AER-)
(2) Aeroquip FCM2013 –6 AN to ½ NPT male adapter (cooler)
(1) Aeroquip FCM1022 –6 AN 45* swivel hose end (trans return line)
(2) Aeroquip FCM4032 –6 AN 90* swivel hose end (cooler)
(1) Aeroquip FCM4042 –6 AN 120* swivel hose end (radiator)
(2) Aeroquip FCM2108 –6 AN to 5/8 –18 inverted flare adapter (radiator & trans return line)
(1) Aeroquip FCA0606 –6 AN AQP racing hose, 6ft.
(1) GM # 442338 (or similar) 5/8 –18 inverted flare female union (trans return line)
Aeroquip website: http://www.aeroquip.com/pages/lit.html
B&M uses ½ NPT female fittings on their coolers, others may be different.
It may be wise to cover up the steel braided line with some of that corrugated split plastic wrap as the steel braid can be very abrasive on whatever it contacts,
GM used the 5/8 –18 inverted flare fittings on transmission lines, through at least 2001 and probably later, then it was changed to something else but I can't recall what it is.
While many people choose to rout the lines a different way, I prefer putting the cooler between the stock cooler in the radiator and the return (upper) line of the trans. That way the radiator will help warm the fluid when it’s cold (which many say is a good thing, especially in cold climates) and the cooler can still bring it down to a good level, especially if it’s a 70270 or 70266 cooler
Many people like the B&M 70264 (14,400 BTU 6x11x1.5), which is sometimes referred to as a 24,000 GVW cooler. Summit’s # is BMM-70264. It includes hoses, clamps, and adapters as well as everything you need to mount the cooler. If you prefer to use AN fittings and stainless steel braided hose then get the B&M 70273. Summits # is BMM-70273 and it doesn’t come with an installation kit.
A lot of people prefer the larger B&M 70270 (8x11x1.5) to drop temps down more. Summit’s # is BMM-70270 and it comes with the same installation kit as the 70264. For use with braided lines the Summit # is BMM-70266. I use the #70297 for extra insurance on a road course in the summer heat.
If you want to use braided lines you’ll need Summit’s SUM-G4990 mounting kit and these additional parts:
Note: Summit puts a prefix in front of the number (AER-)
(2) Aeroquip FCM2013 –6 AN to ½ NPT male adapter (cooler)
(1) Aeroquip FCM1022 –6 AN 45* swivel hose end (trans return line)
(2) Aeroquip FCM4032 –6 AN 90* swivel hose end (cooler)
(1) Aeroquip FCM4042 –6 AN 120* swivel hose end (radiator)
(2) Aeroquip FCM2108 –6 AN to 5/8 –18 inverted flare adapter (radiator & trans return line)
(1) Aeroquip FCA0606 –6 AN AQP racing hose, 6ft.
(1) GM # 442338 (or similar) 5/8 –18 inverted flare female union (trans return line)
Aeroquip website: http://www.aeroquip.com/pages/lit.html
B&M uses ½ NPT female fittings on their coolers, others may be different.
It may be wise to cover up the steel braided line with some of that corrugated split plastic wrap as the steel braid can be very abrasive on whatever it contacts,
GM used the 5/8 –18 inverted flare fittings on transmission lines, through at least 2001 and probably later, then it was changed to something else but I can't recall what it is.
While many people choose to rout the lines a different way, I prefer putting the cooler between the stock cooler in the radiator and the return (upper) line of the trans. That way the radiator will help warm the fluid when it’s cold (which many say is a good thing, especially in cold climates) and the cooler can still bring it down to a good level, especially if it’s a 70270 or 70266 cooler
