Tranny cooler....
Originally posted by RacingAristo
will the aftermarket thermostat help to lower the temp?
will the aftermarket thermostat help to lower the temp?
All cheap mods for good effects.
Lexus Champion
Joined: Jul 2001
Posts: 3,861
Likes: 4
From: North Carolina
Originally posted by RacingAristo
BTW, do you guys know where I could find a decent price on the tranny cooler? Appreciate it.
BTW, do you guys know where I could find a decent price on the tranny cooler? Appreciate it.
www.summitracing.com
just to list a couple
Per Tiny's mention above, PepBoys
Just about any autoparts store online...
Originally posted by RacingAristo
I thought those caps are for the look.
I thought those caps are for the look.
Thread Starter
Lexus Test Driver
Joined: Feb 2001
Posts: 1,481
Likes: 0
From: Texas
Re: Tranny cooler
Originally posted by evad
Does tranny cooler have an integral thermostat that allows cooling only after fluid reaches an optimum temp?
If not, tranny fluid will not reach optimum temp on a cool day.
Does tranny cooler have an integral thermostat that allows cooling only after fluid reaches an optimum temp?
If not, tranny fluid will not reach optimum temp on a cool day.
You are simply putting an extra cooling device in the path of tranny fluid on its way from the radiator back to the tranny.
During city (stop and go or performance) driving, "optimum" temp in a tranny is obtained in a few minutes and is then quickly surpassed......The tranny cooler wont "over-cool" the fluid, it is in place to help keep the optimum oil temp...
The Hayden web-site states that every 20 degree drop in transmission temp can double the life of the transmission.
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Thread Starter
Lexus Test Driver
Joined: Feb 2001
Posts: 1,481
Likes: 0
From: Texas
Originally posted by Mr Johnson
Thanks for the writeup tinygs! Based on what I read here I've decided on the Hayden cooler as well and it's sitting in my garage waiting to be installed over the weekend.
Peter
Thanks for the writeup tinygs! Based on what I read here I've decided on the Hayden cooler as well and it's sitting in my garage waiting to be installed over the weekend.
Peter
As for the tranny cooler, I can imagine it will be an even bigger help for a GS with OVER 320RWHP!!!!! Im jealous...
Be careful
Just an FYI.
I have tried 4 different trans coolers on my and a friends GS4.
We have found that a large unit WILL impede the cooling capabilities in hot weather (100+) along with any type of semi aggressive driving. In fact the needle went straight to below red on both cars. Remember that the trans cooler gets very hot and the air pushes this heat right into the radiator. Also many of these generic coolers use cheap tie straps to connect it to the radiator once again providing heat transfer straight into the cooling system.
I have tried Imperial, Hayden, and two different B&M coolers.
I finally went with the polished B&M racing cooler, anodized connectors and polished steel lines instead of rubber hoses all of the place. Brackets keep the cooler from the radiator for even more cooling. The steel lines were pre-bent for the GS. A very clean and custom look without the negative effects of thrown together kits.
If anyone is interested in pics I can post them.
I have tried 4 different trans coolers on my and a friends GS4.
We have found that a large unit WILL impede the cooling capabilities in hot weather (100+) along with any type of semi aggressive driving. In fact the needle went straight to below red on both cars. Remember that the trans cooler gets very hot and the air pushes this heat right into the radiator. Also many of these generic coolers use cheap tie straps to connect it to the radiator once again providing heat transfer straight into the cooling system.
I have tried Imperial, Hayden, and two different B&M coolers.
I finally went with the polished B&M racing cooler, anodized connectors and polished steel lines instead of rubber hoses all of the place. Brackets keep the cooler from the radiator for even more cooling. The steel lines were pre-bent for the GS. A very clean and custom look without the negative effects of thrown together kits.
If anyone is interested in pics I can post them.
PearlPower - very good info. I'm about to have a TC in my car, so a tranny cooler is of some interest to me, although I still doubt it's really needed.
Can you post a link to info on the web about this B&M product? I've not heard of that or them before. And it's custom made for the GS? If so, that's cool. One other question - why will it not suffer from heating the radiator also like the others?
Can you post a link to info on the web about this B&M product? I've not heard of that or them before. And it's custom made for the GS? If so, that's cool. One other question - why will it not suffer from heating the radiator also like the others?
Sure thing
Hello Bit
This unit is only 11x4.5 vs 11x7-11" for other models. This way it does not block the radiator as much as the other units do. The unit is thicker than most. 1.5" vs .75 for others. So it certainly does the job of cooling. I will post a picture later on since I'm doing an install for a friends 99 GS this evening.
Oh and yes this is a custom kit.
This unit is only 11x4.5 vs 11x7-11" for other models. This way it does not block the radiator as much as the other units do. The unit is thicker than most. 1.5" vs .75 for others. So it certainly does the job of cooling. I will post a picture later on since I'm doing an install for a friends 99 GS this evening.
Oh and yes this is a custom kit.
Pole Position
Joined: May 2001
Posts: 2,465
Likes: 0
From: Illinois
I'm not sure which Hayden cooler you used previously but the 677 is 5 1/2 x 11. The amount of heat it generates and how it's mounted is also a factor. You can mount it in front of the radiator to allow maximum trans cooling or behind the radiator which is less effective (~70-75%) but still cools the trans.
FWIW: I've had a couple of 95 degree days and haven't seen the problems you've mentioned.
OTOH having custom pipes for the cooler sounds niiice.
FWIW: I've had a couple of 95 degree days and haven't seen the problems you've mentioned.
OTOH having custom pipes for the cooler sounds niiice.
Good size
The size you mentioned would work nicely with the GS. As mentioned above, issues come into play when a large unit is utillized as pictured above. Using a pyrometer and also an inline temp sensor and gauge, the fluid of a stock GS went up to 217 degrees on a hot day (103+) without a cooler under hard conditions.
With a large Hayden cooler, it dropped down to 165-177 under the same conditions, but the coolant temp. went straight up to before redline. The large units cover a large portion of the radiator ,and while the radiator is expecting cool fresh air, it is instead getting hot trans cooler air. It goes without saying that this is with the cooler mounted in front of the radiator. With the newer smaller yet thicker unit I'm running without the cheasy tie strapes and associated heat transfer, I run a consistent 161-173 under hard conditions with no coolant temp issues. Your size should not give you any issues as you stated. Curious, where did you mount yours.
Up top or down below? We have found that mounting down below behind the front lower skirt gives slightly better performance.
It was on average a 3 degree difference. Instead I opted to mount it behind the front grill for accessibility to the connectors (no hose clamps) and it looks sweet through the grill.
With a large Hayden cooler, it dropped down to 165-177 under the same conditions, but the coolant temp. went straight up to before redline. The large units cover a large portion of the radiator ,and while the radiator is expecting cool fresh air, it is instead getting hot trans cooler air. It goes without saying that this is with the cooler mounted in front of the radiator. With the newer smaller yet thicker unit I'm running without the cheasy tie strapes and associated heat transfer, I run a consistent 161-173 under hard conditions with no coolant temp issues. Your size should not give you any issues as you stated. Curious, where did you mount yours.
Up top or down below? We have found that mounting down below behind the front lower skirt gives slightly better performance.
It was on average a 3 degree difference. Instead I opted to mount it behind the front grill for accessibility to the connectors (no hose clamps) and it looks sweet through the grill.
Last edited by Pearlpower; Dec 27, 2002 at 12:14 AM.
