Trans cooler radiator bypass
05-25-2011, 02:47 AM
#1
Drifting
Thread Starter
Trans cooler radiator bypass
It seems like this is 50/50. I'm installing the b&m 29900 BTU transmission cooler (11x11x1.5). With this size (the biggest B&M makes) trans cooler is my trans temps going to stay cooler if I first run the fluid through the radiator built in transmission cooler before I run it through the external cooler or should I skip the radiator cooler all together and only run it through the external cooler?
I will NOT be driving this car in cold weather.
I will NOT be driving this car in cold weather.
05-25-2011, 11:21 PM
#3
Drifting
Thread Starter
Why do I need a trans cooler pump? Isn't the pump in the trans sufficient? I've never actually heard of anybody using an external pump with an auto trans. Do I really need a pump?
05-26-2011, 01:05 AM
#4
05-26-2011, 01:38 AM
#5
Drifting
Thread Starter
05-26-2011, 02:05 AM
#6
Instructor
I just installed a B&M trans. cooler on a RPM trans. with a Yank 3200
stall. I went with the radiator and then to the cooler and returned
to the transmission. The converter locks up at 50 MPH and runs about
150 with the slippage at the converter. The outside temp is 75 and I
live in a mountainous environment.
I do some colder weather driving so I wanted the trans. to come to
operating temp. The car is a 98 coup with H/C.
Hope this helps and you do not need another trans. pump!!!!!!
stall. I went with the radiator and then to the cooler and returned
to the transmission. The converter locks up at 50 MPH and runs about
150 with the slippage at the converter. The outside temp is 75 and I
live in a mountainous environment.
I do some colder weather driving so I wanted the trans. to come to
operating temp. The car is a 98 coup with H/C.
Hope this helps and you do not need another trans. pump!!!!!!
05-26-2011, 06:44 AM
#7
Racer
I just installed a B&M trans. cooler on a RPM trans. with a Yank 3200
stall. I went with the radiator and then to the cooler and returned
to the transmission. The converter locks up at 50 MPH and runs about
150 with the slippage at the converter. The outside temp is 75 and I
live in a mountainous environment.
I do some colder weather driving so I wanted the trans. to come to
operating temp. The car is a 98 coup with H/C.
Hope this helps and you do not need another trans. pump!!!!!!
stall. I went with the radiator and then to the cooler and returned
to the transmission. The converter locks up at 50 MPH and runs about
150 with the slippage at the converter. The outside temp is 75 and I
live in a mountainous environment.
I do some colder weather driving so I wanted the trans. to come to
operating temp. The car is a 98 coup with H/C.
Hope this helps and you do not need another trans. pump!!!!!!
HTH
05-26-2011, 08:27 AM
#8
Team Owner
Member Since: Sep 2003
Location: Raleigh / Rolesville NC
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Separate Trans pump
If your running an external trans cooler, because the integrated trans cooler is not doing the job, then you also need a separate trans pump.
Change your trans fluid more often and use a good synthetic fluid. Clean out the radiators with a low pressure air hose and I would bet the stock trans cooler will do just fine
If your running an external trans cooler, because the integrated trans cooler is not doing the job, then you also need a separate trans pump.
Change your trans fluid more often and use a good synthetic fluid. Clean out the radiators with a low pressure air hose and I would bet the stock trans cooler will do just fine
Last edited by AU N EGL; 05-26-2011 at 08:29 AM.
05-26-2011, 09:43 AM
#9
Drifting
Thread Starter
Separate Trans pump
If your running an external trans cooler, because the integrated trans cooler is not doing the job, then you also need a separate trans pump.
Change your trans fluid more often and use a good synthetic fluid. Clean out the radiators with a low pressure air hose and I would bet the stock trans cooler will do just fine
If your running an external trans cooler, because the integrated trans cooler is not doing the job, then you also need a separate trans pump.
Change your trans fluid more often and use a good synthetic fluid. Clean out the radiators with a low pressure air hose and I would bet the stock trans cooler will do just fine
Are you sure I really need to run an external pump on an auto trans? I have really never heard of this. I can certainly do it if necessary. I'm afraid of the external pump couldn't keep up, or failed, I'd have huge mess ( burst line) at best and a destroyed trans at worst.
05-26-2011, 10:13 AM
#10
Team Owner
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more like the stock pump will not keep up.
an external pump can always be added if your temps stay high.
We found changing the trans and diff fluids OFTEN makes a big difference
for drag racing, changing the fluids each winter / off season would be advised.
for normal driving and occasional spirited driving the normal change interval should be fine.
Road Racing with a Manual we change every few hundred miles of every other race.
an external pump can always be added if your temps stay high.
We found changing the trans and diff fluids OFTEN makes a big difference
for drag racing, changing the fluids each winter / off season would be advised.
for normal driving and occasional spirited driving the normal change interval should be fine.
Road Racing with a Manual we change every few hundred miles of every other race.
Last edited by AU N EGL; 05-26-2011 at 10:16 AM.
05-26-2011, 10:26 AM
#11
Melting Slicks
This is another one of those "opinion" issues like the "160* thermostat" I have read MANY articles where guys have given "evidence", with before and after temps, that one worked better than the other, and visa vera. Still no concrete answer 
Can't imagine using an external pump. Not going to argue with AUNEGL, but don't see how the pressures would match, etc, so I'm not going to do it when I swap mine
Let us know th eoutcome whichever way you do it. I really need one for my RPM, but havn't had time
Can't imagine using an external pump. Not going to argue with AUNEGL, but don't see how the pressures would match, etc, so I'm not going to do it when I swap mine
Let us know th eoutcome whichever way you do it. I really need one for my RPM, but havn't had time
05-26-2011, 11:06 AM
#12
Melting Slicks
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You don't need an external pump with an automatic transmission!
The pump in the transmission is more then capable of flowing enough fluid to keep it cool no matter what size the cooler.
The pump in the transmission is more then capable of flowing enough fluid to keep it cool no matter what size the cooler.
05-26-2011, 10:25 PM
#13
Team Owner
I've done it both way but didn't have gauges to tell the difference. But, in my mind it seems letting the radiator do it's thing, then sending it through the aftermarket cooler for final cooling would work as well as it could. I'll probably do mine that way when I insall the 3200 Vigilate I bough several months ago.
HTH
HTH
