When hooking up a trans. cooler,is it better to connect it in
conjunction with existing radiator cooler,or just run it straight from
trans.?If engine runs warmer than it should,does this shorten
trans.life?If hooked up straight to external cooler,firmer shifts in
colder weather?Probably effect gas mileage also? I've seen them
connected both ways an would like opinions preferred here.
Thats the way I was planning on connecting it on my 88 S-10 4.3
Blazer.The engine has a temp. guage on it that gets to around 250
deg.when sitting in traffic.But it doesn't boil the water into the over
flow bottle.I believe the guage is off.I will be installing a
mech.guage.I had a 83 S-10 P/U 2.8 with an external cooler that was
connected straight to the trans.and the fluid was always cool,but it
shifted harder in winter until it was driven for a while.The engine was
always extremely warm.After running it for a while when I raised the
hood it was like taking the lid off a hot pot.But the trans. stayed
It all depends on the driving conditions that you experience.
1. Heat in a transmission is your worst enemy and can be a good
friend. Let me explain.
If you're driving in the northern states where it is colder, not
pulling anything, then hook up the trans cooler tandem with the
radiator. The extra heat transfer from the radiator will warm the
transmission fluid and bring it up to operating temperatures a lot
quicker than having a separate trans cooler.
If you're driving in the southern states or hauling trailers, a stand
alone trans cooler independent of the radiator works best. The
transmission and especially the radiator will run cooler because the
transmission fluid won't be trying to add heat back into the radiator
and more heat will be dissipated from the transmission. With stable
coolant and trans temps, engine and transmission overheating are less
likely to occur.
Either way, add the trans cooler ASAP as this can double your mileage
on the transmission before an overhaul.
On Sat, 8 Jul 2006 21:32:54 -0400, firstname.lastname@example.org (bobby swift)
This is in error. Where do you think the heat from tranny goes when
you do a complete bypass? It goes into raditor core (A/C condensor and
radiator) so cooling capacity is lost. You ALWAYS hook them up in
series by running it through tank cooler first THEN aux cooler and do
not go overboard with size either as trany does its best in the 180 to
200 degrees range and you do not want to over cool it. Also by keeping
tank cooler in circuit not only do you have more cooling capacity for
tranny but you will also keeps its temps more stable.
The guy asked for opinions, I gave him mine. You certainly have the
right to express yours. Quite frankly though, I stand behind what I
One, if driving in hot climates, it is best to hook up a slightly
oversized (determined by GVW) auxiliary cooler and bypass the tank
cooler altogether. The engine will be less likely to overheat.
Secondly, since you want to point out errors. YOU are in ERROR! The
transmission is less likely to be overcooled, by running through the
aux cooler first and then through the tank cooler.
Thirdly, you are not ALWAYS RIGHT! There is no black and white in
automotive upgrades, only shades of gray.
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