I just recently picked up a 2006 Grand Prix GXP and want to add a good trans cooler what do you guys recommend ?
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07-18-2017
I just recently picked up a 2006 Grand Prix GXP and want to add a good trans cooler what do you guys recommend ?
07-18-2017
Tru cool max on ebay for $118 on ebay. Also would instal a transgo shift kit too with filter and new fluid too.
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07-20-2017
Ok another question between researching up trans coolers what is better the inline or bypass coolers
07-20-2017
Run the cooler as a stand alone outside of the stock GM in radiator cooling. I have been running trans coolers as stand alones for 35 years and have never had a tranny failure. My 01 GP uses (2) long/dana coolers (18,000 GVW each), total cooling 36,000 GVW, for 120,000 miles now with zero issues. DD GP 365 days a year in very hot and very cold weather.Tranny still perfect at 205,000 miles.....
07-20-2017
Tru-Cool 4590.
Bypass the radiator.
Done and done.
07-20-2017
ok I was looking at the one bkirwin recommened does that one also bypass the rad ? heres the link
http://www.ebay.com/itm/Tru-Cool-Max...dWr6RW&vxp=mtr
07-21-2017
Does not have bypass, but on ebay for another $37. I'm getting the bypass kit as well.
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08-10-2017
Going to order the Tru Cool 4590 off amazon tomorrow and to bypass the rad is there a bypass kit I need to buy or tell the shop I'm taking it to tell them I want it to bypass the rad ??
08-10-2017
A shop should be able to figure it out. Or call them and ask. Or diy and save the money.. Its a easy thing to do.. I know because I did mine with no issues. If it can be messed up then ill mess it up every time.. Granted I have gtp not gxp but thats tit for tat lol
08-10-2017
B&M #70264 has the low temp bypass built in.
08-10-2017
Do either of your coolers have a low temp bypass?Originally Posted by jbamonte
08-10-2017
I use the tru cool 4590 on mine it's easy to bypass the rad btw
08-10-2017
What are your trans temp after the cooler install
08-11-2017
Yes, both coolers have built in temp control:
Tru-Cool LPD Transmission Oil Coolers. Protect Your Investment—and Your Warranties.
You can extend the life of your transmission and reduce the risk of costly repair bills with Tru-Cool LPD transmission oil coolers. By maintaining lower operating temperatures, you can significantly extend the life of both your transmission and the lubrication that keeps everything running smoothly.
Drive hard. Rest easy. Get the OE advantage that comes from a Tru-Cool LPD transmission oil cooler, as well as the proven cooling that can help you protect the life of your vehicle.
- 30% more cooling than traditional tube and fin design
- 15 times less flow restriction that tube and fin
- Self-regulating for maximum cooling and running protection
- Durable brazed aluminum construction with a lifetime guarantee
- Available in stacked plate or fin and plate designs
- Available in 13 sizes
Summer temps during hot weather are 135-140 tops and 125 degrees in the winter....coolers have been on the tranny for 130,000 miles and counting..........car driven all year round and in very cold weather.
08-11-2017
No LS4 is running 125-140* on the transmission. Mine was usually in the realm of 160-180*...even beating on it. That was with a new built TEP trans and a Tru-Cool 4590 bypassing the radiator and a finned trans pan. LS4 heat is worlds more than any 3100/3800 puts out.
08-11-2017
And your point is about the LS4?????
08-11-2017
Well the OP has an LS4, so what good does any other engine temp range do?
LS4 generates a lot of heat.
08-11-2017
The LS4 I assume uses a beefed up 4T65E-HD (if there is such a thing). I currently have 3 cars with Long Dana Coolers of different cooling effectiveness. On my Mustang GT 5.0 V8 (325 NET HP/360 Ft-lbs TQ with the ford auto tranny, I had to go to 42,000 GVW cooling capacity and that tranny also runs in the 135-145 temp. The AODE tranny ran very high temps when cooled by the radiator only before the external coolers doing all the cooling. You need to size the coolers to meet the heat reduction requirement. All my cars with tranny coolers run in the 125-145 range easily, even under severe load. Put (2) 28,000 GVW coolers in the nose of the LS4 and I guarantee that the tranny temps will be in the 125-140 range. How do I know? From doing it on the mustang tranny...
Last edited by jbamonte; 08-11-2017 at 06:31 PM.
08-12-2017
Apples and oranges.
It won't ever stay that cold.
Go buy an LS4 car and find out...factory temps soar north of 220* on average.
And no, there isn't anything much different in it than a Comp G TAPShift transmission. That's why they always fail; from excessive heat breakdown. The 4590 is rated at 28k by itself. It doesn't need two coolers.
08-14-2017
My LS4 stays that cold in the cold of winter(110 to 120 degrees 45 minute commute), Hayden 679 trans cooler inline with the factory cooler. Average summer temp is around 180, before the cooler was added it would reach 220 easy. I don't drive it in the winter anymore, but those temps were too cool in my opinion .
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