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Good day everyone. I am asking for assistant from expert or someone who have done this before. I bought a base model '15 c7 with a manual tranny. I am trying to install a transmission fluid radiator cooler in the driver rear panel of car. I did my homework and search the forum along with google keywords and so far, I have parts number. They are as follow:
23212375 (manual tranny line for z06) ??
23488081 (manaual tranny line for base model)
23283460 (tranny radiator)
23212340 (duct)
19210848 (fitting)
88960976 (retainer)
24288159 (other retainer)
11610123 (stud)
Since its a based model and it does not come with these parts. I had to do homework and make sure these fit. So far so good. My question is does 23212375 line fit with base model or does 23488081 fit? I know the line connect to the radiator can clip up, however, the other end of the line going to the tranny does not look like it does not clip on to anything once I open up the plug on the tranny side. Do I need any extra part before I tackle this? Any knowledge would be appreciated.
I am not sure that a base M7 has the pump inside the transmission to pump the fluid thru the cooler.
This pump is located at the front of the transmission case, I think the lines come out the driver side.
I am not sure that a base M7 has the pump inside the transmission to pump the fluid thru the cooler.
This pump is located at the front of the transmission case, I think the lines come out the driver side.
From my understanding from previous search and talking to a corvette tech. He and others mentioned that the tranny gears will fling the fluid on the inside around. Some forum do mention that I will have to add more than what is recommend in the c7 booklet to offset added volume. Now you got me wondering if there is a pump on the inside.. haha. I do remember reading that there is not a pump on the inside of the m7 gearbox. Might be wrong.
From my understanding from previous search and talking to a corvette tech. He and others mentioned that the tranny gears will fling the fluid on the inside around. Some forum do mention that I will have to add more than what is recommend in the c7 booklet to offset added volume. Now you got me wondering if there is a pump on the inside.. haha. I do remember reading that there is not a pump on the inside of the m7 gearbox. Might be wrong.
The transmission does have a fluid pump in it. There is no way the transmission fluid circulates through a Tremec manual transmission cooling circuit without an internal or external pump. Fluid splashing off the gears doesn't have sufficient pressure or flow capacity to circulate out of the transmission and into the cooler mounted behind the wheel well and then back to the transmission. Check this description of the Tremec 7 speed transmission built for the C7. On the parts breakdown note items 17-22 and items 26, 27 and 29. If your transmission doesn't have the mounting points for these pump parts then it may not do any good to add the cooler although adding an external pump may work. GM introduced a GMPP auxiliary transmission cooler for the Tremec C5 6 speed which used an external electric fuel pump to pull fluid out of the transmission drain, run it forward to a cooler mounted in front fo the AC condenser and then brought it back to the fluid input plug on the transmission. You could do something similar. The GMPP cooler also had a thermostat that was mounted to one of the transmission ears and turned the pump on when the transmission case temp went over 185 degrees.
The transmission does have a fluid pump in it. There is no way the transmission fluid circulates through a Tremec manual transmission cooling circuit without an internal or external pump. Fluid splashing off the gears doesn't have sufficient pressure or flow capacity to circulate out of the transmission and into the cooler mounted behind the wheel well and then back to the transmission. Check this description of the Tremec 7 speed transmission built for the C7. On the parts breakdown note items 17-22 and items 26, 27 and 29. If your transmission doesn't have the mounting points for these pump parts then it may not do any good to add the cooler although adding an external pump may work. GM introduced a GMPP auxiliary transmission cooler for the Tremec C5 6 speed which used an external electric fuel pump to pull fluid out of the transmission drain, run it forward to a cooler mounted in front fo the AC condenser and then brought it back to the fluid input plug on the transmission. You could do something similar. The GMPP cooler also had a thermostat that was mounted to one of the transmission ears and turned the pump on when the transmission case temp went over 185 degrees.
Bill
Bill– You never let me down with your descriptive posts and your knowledge throughout my research.
Your post with what the diagram show. It look like I just need number 29 (first diagram) and 23 (second diagram) for nlet and outlet pipe connect. Thanks again Bill for your help. Your posts are very informative.
What I mean is that a base M7, which did not come from the factory with a transmission cooler, may not have the actual pump guts (item #21 in the linked diagram, or item #1 in the FSM page 17-553) inside the case.
It also probably doesn't have the connections for the cooler pipes drilled open and threaded.
The below pic looks like a base M7, as there appears to be no open or threaded cooler connections, nor does it have the drilled and threaded hole for the temperature sensor.
Last edited by ersatz928; Apr 1, 2023 at 02:29 PM.
What I mean is that a base M7, which did not come from the factory with a transmission cooler, may not have the actual pump guts (item #21 in the linked diagram, or item #1 in the FSM page 17-553) inside the case.
It also probably doesn't have the connections for the cooler pipes drilled open and threaded.
The below pic looks like a base M7, as there appears to be no open or threaded cooler connections, nor does it have the drilled and threaded hole for the temperature sensor.
I suspected the base transmission may not have the mounting points for the cooler and why I suggested using an external pump. The external pump would still let him use the stock rear mounted transmission cooler. The inlet and outlet of the pump and the outlet of the cooling circuit would just be in different locations.
I suspected the base transmission may not have the mounting points for the cooler and why I suggested using an external pump. The external pump would still let him use the stock rear mounted transmission cooler. The inlet and outlet of the pump and the outlet of the cooling circuit would just be in different locations.
Bill
Thank you. Most of these pumps that are available cannot run for extended amount of time. I guess a switch would need only to run during heavy load.
Transmission radiator install
