Stumped on Trans temps
08-18-2012, 07:22 AM
#1
Stumped on Trans temps After getting my car back from this last build my trans temps as well as coolant temps have been way hotter. They both hit 230f yesterday which I have never seen on this car.
Temps this time of year before the build were 180s for trans and 202 coolant. It was perfect.
Now I always expect trans temp to go way over 200 and coolant to go 215+.
Mods done...
TEA stage 2 243 62cc - COMP 228/232 112 - TFS pushrods - LS7 lifters - P/P LS6 oil pump - LSXR timing chain - 160 t-stat - Powerbond 25% balancer - FAST 92mm intake - 42lb injectors - NW 92mm TB - SLP smooth bellow - ZO6 85mm MAF - FTP 98mm lid - Motive 3.73
I understand I have a totally different car now but how could temps be so out of control now? Any ideas?
Temps this time of year before the build were 180s for trans and 202 coolant. It was perfect.
Now I always expect trans temp to go way over 200 and coolant to go 215+.
Mods done...
TEA stage 2 243 62cc - COMP 228/232 112 - TFS pushrods - LS7 lifters - P/P LS6 oil pump - LSXR timing chain - 160 t-stat - Powerbond 25% balancer - FAST 92mm intake - 42lb injectors - NW 92mm TB - SLP smooth bellow - ZO6 85mm MAF - FTP 98mm lid - Motive 3.73
I understand I have a totally different car now but how could temps be so out of control now? Any ideas?
08-18-2012, 07:37 AM
#3
Iv been so concerned about the temps I ordered the 14,400 btu b+m trans cooler and installed it yesterday. I installed in on my radiator just like the flex a lite. Well, thats when I saw 230 trans temp. The flex a lite fin and tube worked better.
I tried dope style a few years ago with my stock stall and wasnt impressed with it but im going to try it again. I dont think having trans cooler and radiator touching eachother are helping.
After this build I have a 160 t stat with fans that come on sooner and temps are way higher I just dont get it
08-18-2012, 09:32 AM
#4
TECH Senior Member
iTrader: (96)
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,240
Likes: 0
Received 79 Likes
on
70 Posts
You have Midwest bumper supports don't you? I made a post over on PlanetLSX about trans cooling issues. I will copy and post it here for you. And, where are you getting these temp figures from?
08-18-2012, 09:35 AM
#5
TECH Senior Member
iTrader: (96)
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,240
Likes: 0
Received 79 Likes
on
70 Posts
I just recently moved my cooler to the front bumper and temps have skyrocketed. I think the air in the bumper is stale without a dedicated pass-through. I ordered a $25 9 inch cooler fan to mount to the trans cooler.
My first and only cooler location was the standard "in front of the condenser". Air would pull up from the bottom deflector and up into the plastic shrouding tunnel that gives it no where to go except through the condenser then radiator. Sticking it here was one of your only options. I made some changes, tubular bumper supports and a ram air setup. Figured the cooler had to move, bumper was now empty, it made perfect sense. Fabbed up the mounts, cut a section of "camaro" out behind the billet grill and wala. Cooler is being blasted with cold air from the front of the vehicle. First drives, the temps went way up. I realized the air is likely bypassing the cooler because of positive pressure in the bumper. So with no more modding, seems the fan is the quickest and easiest fix.
Here's the new setup mounted: (And I'm glad I left the extra length of hose attached, it has come in handy several times by not having to break the system open)
Here is looking up from the creeper. I cut that upward flap in the bumper off, and cut a cooler size hole in the front of the bumper so air can get in and out....or so I thought.
Looking a little more forward you can see the front air opening. What was happening was the air being picked up from the underside air dam was trying to find a place to go and I think was putting positive pressure through the rear of the bumper. Now if the front entrance air, and the underside entrance air are traveling at roughly the same velocity then they cancel each other out when they meet from different directions. Obviously the fan will correct this issue. Originally the cooler was mounted directly behind the grille to minimize air being able to sneak around it instead of through it. The brackets I had made and the fan weren't jiving so I had to make new ones so I decided to pull the cooler back some. Since it isn't dependent on natural moving air I figured pulling it back some wouldn't hurt.
My first and only cooler location was the standard "in front of the condenser". Air would pull up from the bottom deflector and up into the plastic shrouding tunnel that gives it no where to go except through the condenser then radiator. Sticking it here was one of your only options. I made some changes, tubular bumper supports and a ram air setup. Figured the cooler had to move, bumper was now empty, it made perfect sense. Fabbed up the mounts, cut a section of "camaro" out behind the billet grill and wala. Cooler is being blasted with cold air from the front of the vehicle. First drives, the temps went way up. I realized the air is likely bypassing the cooler because of positive pressure in the bumper. So with no more modding, seems the fan is the quickest and easiest fix.
Here's the new setup mounted: (And I'm glad I left the extra length of hose attached, it has come in handy several times by not having to break the system open)
Here is looking up from the creeper. I cut that upward flap in the bumper off, and cut a cooler size hole in the front of the bumper so air can get in and out....or so I thought.
Looking a little more forward you can see the front air opening. What was happening was the air being picked up from the underside air dam was trying to find a place to go and I think was putting positive pressure through the rear of the bumper. Now if the front entrance air, and the underside entrance air are traveling at roughly the same velocity then they cancel each other out when they meet from different directions. Obviously the fan will correct this issue. Originally the cooler was mounted directly behind the grille to minimize air being able to sneak around it instead of through it. The brackets I had made and the fan weren't jiving so I had to make new ones so I decided to pull the cooler back some. Since it isn't dependent on natural moving air I figured pulling it back some wouldn't hurt.
Trending Topics
08-18-2012, 09:56 AM
#8
Thats what I have gathered to but 230 is way to much to read from anywhere imo.
I cant understand why trans and coolant temps are so high.
Hows your coolant temps after your AI heads?
Could 3.73 make more heat in the trans?
My lockup is 42mph now instead of 38mph but how much could this possibly hurt?
Higher compression heads make much more heat?
Trans temp is literally 40 degree higher than before the build. I just dont get this
08-18-2012, 10:19 AM
#9
TECH Senior Member
iTrader: (96)
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,240
Likes: 0
Received 79 Likes
on
70 Posts
My temps have stayed consistent since the beginning with a few minor changes but they all related to cooler only changes. No engine changes, with the exception of fan settings, have ever altered coolant or trans temps. Below in front of the condenser trans pan temps:
B+M 70264 plus stock cooler: 190 idling, and given enough time driving, 180 all the time. Radiator heated the trans up fast as hell.
B+M 70264 no stock cooler: 180 with long enough driving but took much, much longer to reach it. If the weather was 70 or below the trans would never crest 140 as long as there was no extended idling periods.
B+M 70274 only: same as above, but takes even longer to heat up.
Track with hot laps: 195 is the highest Ive ever seen.
B+M 70264 plus stock cooler: 190 idling, and given enough time driving, 180 all the time. Radiator heated the trans up fast as hell.
B+M 70264 no stock cooler: 180 with long enough driving but took much, much longer to reach it. If the weather was 70 or below the trans would never crest 140 as long as there was no extended idling periods.
B+M 70274 only: same as above, but takes even longer to heat up.
Track with hot laps: 195 is the highest Ive ever seen.
08-18-2012, 10:31 AM
#10
My temps have stayed consistent since the beginning with a few minor changes but they all related to cooler only changes. No engine changes, with the exception of fan settings, have ever altered coolant or trans temps. Below in front of the condenser trans pan temps:
B+M 70264 plus stock cooler: 190 idling, and given enough time driving, 180 all the time. Radiator heated the trans up fast as hell.
B+M 70264 no stock cooler: 180 with long enough driving but took much, much longer to reach it. If the weather was 70 or below the trans would never crest 140 as long as there was no extended idling periods.
B+M 70274 only: same as above, but takes even longer to heat up.
Track with hot laps: 195 is the highest Ive ever seen.
B+M 70264 plus stock cooler: 190 idling, and given enough time driving, 180 all the time. Radiator heated the trans up fast as hell.
B+M 70264 no stock cooler: 180 with long enough driving but took much, much longer to reach it. If the weather was 70 or below the trans would never crest 140 as long as there was no extended idling periods.
B+M 70274 only: same as above, but takes even longer to heat up.
Track with hot laps: 195 is the highest Ive ever seen.
This is not with the fan?
08-18-2012, 04:42 PM
#13
TECH Senior Member
iTrader: (96)
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 24,240
Likes: 0
Received 79 Likes
on
70 Posts
Car hasn't been run yet with the fan. The reason I installed it was bc when I moved the cooler tothe bumper, then went and did my tuning my trans was at 195 in less then 10 minutes 
That was way uncalled for. I even saw up to 210 which has NEVER happened. But I haven't ran the car with the fan yet, but based on the amount of air it moves, I'm sure it's gonna be back to its old self.
That was way uncalled for. I even saw up to 210 which has NEVER happened. But I haven't ran the car with the fan yet, but based on the amount of air it moves, I'm sure it's gonna be back to its old self. 