Gary Trans temp ?
Question:
because cooler is better
– Hide quoted text — Show quoted text -> why are you so adamantly against hooking up the radiator cooler before the > aux cooler? that’s how my cooler instructions said to hook mine up. > > > as a practical matter, it is pretty much impossible for the return > temp > to > > > be below that of the radiator coolant > > > that’s why I recommend auxiliary coolers, bypassing the radiator > entirely > > Understood! > > Coolers rigged to rad heat exchanger then 2 external and then return > NO ! > transmission out to external coolers and back > NO radiator cooler > > > your ‘to cooler’ temp seems about right, given that in your situation > the > > > converter would be unlocked, in multiplication mode…. > > Is there some slippage in an unlocked converter and the result being > heat? > > Or is the temp just the result of overall load? > correct > converter slip generates heat > > Thanks Rolf > > PS the brakes are no dragging!
Response:
Gary, Quick question about this. If there is a measured temperature drop after the radiator cooler why not use it to drop the temp and then route to an external cooler to drop it further. That would seem to drop the temp farther than just the single external cooler. The biggest problem with that set up would be the extra lines and fittings. Steve W.
> because cooler is better >"nozel" wrote, I have added some temp monitoring patches to the cooler in and return lines > and have noted 260* f inlet and 210* f at the return line after towing
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Response:
because I see low-mid 200’s into an auxiliary cooler (Tru-Cool 4590, the big one) and about 50-60 over ambient air-temp out, measured with an IR reading ‘gun’ it works without all the extra plumbing case a clutch or band sheds crap, a 4590 isn’t
– Hide quoted text — Show quoted text -> Gary, > Quick question about this. If there is a measured temperature drop after > the radiator cooler why not use it to drop the temp and then route to an > external cooler to drop it further. That would seem to drop the temp farther > than just the single external cooler. The biggest problem with that set up > would be the extra lines and fittings. > Steve W. > because cooler is better >"nozel" wrote, I have added some temp monitoring patches to the cooler in > and return lines > and have noted 260* f inlet and 210* f at the return line after towing > —–= Posted via Newsfeeds.Com, Uncensored Usenet News =—– > http://www.newsfeeds.com – The #1 Newsgroup Service in the World! > —–== Over 80,000 Newsgroups – 16 Different Servers! =—–
Response:
>why are you so adamantly against hooking up the radiator cooler before the >aux cooler? that’s how my cooler instructions said to hook mine up.
it would seem logical that you want it away from the heat of the radiator… the coolant can heat your transmission fluid… your cooler could be having to cool the fluid after both your tranny and radiator heat it… – Hide quoted text — Show quoted text -> > > as a practical matter, it is pretty much impossible for the return >temp > to > > > be below that of the radiator coolant > > > that’s why I recommend auxiliary coolers, bypassing the radiator > entirely > > Understood! > > Coolers rigged to rad heat exchanger then 2 external and then return > NO ! > transmission out to external coolers and back > NO radiator cooler > > > your ‘to cooler’ temp seems about right, given that in your situation > the > > > converter would be unlocked, in multiplication mode…. > > Is there some slippage in an unlocked converter and the result being >heat? > > Or is the temp just the result of overall load? > correct > converter slip generates heat > > Thanks Rolf > > PS the brakes are no dragging!
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Response:
I monitor temp. on the external cooler out line and see max temps of 240F pulling a popup camper at low speed (<30mph) and 10% grade. However level road temps run under 200 at 65mph. I’d be more concerned about the circumstances you are are seeing 260. I don’t think the 260 is out of line if for short periods. Like one of the other responses recommended, I by-passed the in-radiator cooler and only have the external unit.
– Hide quoted text — Show quoted text -> Gary > I have added some temp monitoring patches to the cooler in and return lines > and have noted 260* f inlet and 210* f at the return line after towing tent > trailer,6 bicicle headwind (on roof) my family of 6 +camping gear up a > gnarly 7% over 30 Km grade.
Response:
why are you so adamantly against hooking up the radiator cooler before the aux cooler? that’s how my cooler instructions said to hook mine up.
– Hide quoted text — Show quoted text -> > as a practical matter, it is pretty much impossible for the return temp > to > > be below that of the radiator coolant > > that’s why I recommend auxiliary coolers, bypassing the radiator > entirely > Understood! > Coolers rigged to rad heat exchanger then 2 external and then return > NO ! > transmission out to external coolers and back > NO radiator cooler > > your ‘to cooler’ temp seems about right, given that in your situation > the > > converter would be unlocked, in multiplication mode…. > Is there some slippage in an unlocked converter and the result being heat? > Or is the temp just the result of overall load? > correct > converter slip generates heat > Thanks Rolf > PS the brakes are no dragging!
Response:
don’t forget that in a towing situation the trans fluid temp often will be well above the radiator coolant temp, allowing the radiator to cool the tranny fluid down nearer to it’s temp before sending it to the aux cooler, which will cool it further. heating the fluid with the radiator isn’t always a bad thing either, in my caterpillar TH-63 that I use at work, the hydraulic/transmisson fluid (hytran to be specific) is routed through the radiator on purpose for this very reason, to allow it to warm the fluid to operating temp as quick as possible. here’s my case: 88 k2500, 350, th700r-4, 190deg coolant temp, perm cool aux cooler (don’t know model #, it was the biggest they had (about 1/3 the area of my radiator)), autometer trans temp gauge in pressure test port. if the temp is below 30F or so, tranny never gets above 125F, between 30 and 60F about 150F, it’s not been warmer than that since i put the temp gauge in. the warmest temp I have seen on the gauge is 205F when I had approx 1800lbs in the bed (6×5 hay bale, very large sail) and in D climbing a large hill. it seems my setup works for me, YMMV. – Hide quoted text — Show quoted text ->why are you so adamantly against hooking up the radiator cooler before the >aux cooler? that’s how my cooler instructions said to hook mine up. > it would seem logical that you want it away from the heat of the > radiator… the coolant can heat your transmission fluid… > your cooler could be having to cool the fluid after both your tranny > and radiator heat it…
Response:
You got a hanging brake?
– Hide quoted text — Show quoted text -> Gary > I have added some temp monitoring patches to the cooler in and return lines > and have noted 260* f inlet and 210* f at the return line after towing tent > trailer,6 bicicle headwind (on roof) my family of 6 +camping gear up a > gnarly 7% over 30 Km grade. > The Suburban has a 4L60E rebuilt Aprox 40000 Km ago due to TQ clutch > solenoid problems.Other than load induced have you any thoughts as to where > the heat is being generated? TQ clutch will not be locked due to D3 selected > with moderate throttle to maintain 75-80Km/h Speed limit this road 110 Km/h > BTW cooler(s) 2 external > Thanks for your thoughts > Rolf Zell
Response:
– Hide quoted text — Show quoted text -> Gary > I have added some temp monitoring patches to the cooler in and return lines > and have noted 260* f inlet and 210* f at the return line after towing tent > trailer,6 bicicle headwind (on roof) my family of 6 +camping gear up a > gnarly 7% over 30 Km grade. > The Suburban has a 4L60E rebuilt Aprox 40000 Km ago due to TQ clutch > solenoid problems.Other than load induced have you any thoughts as to where > the heat is being generated? TQ clutch will not be locked due to D3 selected > with moderate throttle to maintain 75-80Km/h Speed limit this road 110 Km/h > BTW cooler(s) 2 external > Thanks for your thoughts > Rolf Zell
Sounds like pretty typical towing temps to me. Do you have an auxiliary cooler? The tranny temps will be higher than the engine temps, so the numbers seem close to me. When Gary shows up he will know more! Greg
Response:
– Hide quoted text — Show quoted text -> Gary > I have added some temp monitoring patches to the cooler in and return > lines > and have noted 260* f inlet and 210* f at the return line after towing > tent > trailer,6 bicicle headwind (on roof) my family of 6 +camping gear up a > gnarly 7% over 30 Km grade. > The Suburban has a 4L60E rebuilt Aprox 40000 Km ago due to TQ clutch > solenoid problems.Other than load induced have you any thoughts as to > where > the heat is being generated? TQ clutch will not be locked due to D3 > selected > with moderate throttle to maintain 75-80Km/h Speed limit this road 110 > Km/h > BTW cooler(s) 2 external > Thanks for your thoughts > Rolf Zell > Sounds like pretty typical towing temps to me. Do you have an auxiliary > cooler? The tranny temps will be higher than the engine temps, so the > numbers seem close to me. > When Gary shows up he will know more! > Greg
as a practical matter, it is pretty much impossible for the return temp to be below that of the radiator coolant that’s why I recommend auxiliary coolers, bypassing the radiator entirely your ‘to cooler’ temp seems about right, given that in your situation the converter would be unlocked, in multiplication mode….
Response:
> as a practical matter, it is pretty much impossible for the return temp to > be below that of the radiator coolant > that’s why I recommend auxiliary coolers, bypassing the radiator entirely
Understood! Coolers rigged to rad heat exchanger then 2 external and then return > your ‘to cooler’ temp seems about right, given that in your situation the > converter would be unlocked, in multiplication mode….
Is there some slippage in an unlocked converter and the result being heat? Or is the temp just the result of overall load? Thanks Rolf PS the brakes are no dragging!
Response:
> as a practical matter, it is pretty much impossible for the return temp to > be below that of the radiator coolant > that’s why I recommend auxiliary coolers, bypassing the radiator entirely > Understood! > Coolers rigged to rad heat exchanger then 2 external and then return
NO ! transmission out to external coolers and back NO radiator cooler > your ‘to cooler’ temp seems about right, given that in your situation the > converter would be unlocked, in multiplication mode…. > Is there some slippage in an unlocked converter and the result being heat? > Or is the temp just the result of overall load?
correct converter slip generates heat – Hide quoted text — Show quoted text -> Thanks Rolf > PS the brakes are no dragging!
Response:
Gary I have added some temp monitoring patches to the cooler in and return lines and have noted 260* f inlet and 210* f at the return line after towing tent trailer,6 bicicle headwind (on roof) my family of 6 +camping gear up a gnarly 7% over 30 Km grade. The Suburban has a 4L60E rebuilt Aprox 40000 Km ago due to TQ clutch solenoid problems.Other than load induced have you any thoughts as to where the heat is being generated? TQ clutch will not be locked due to D3 selected with moderate throttle to maintain 75-80Km/h Speed limit this road 110 Km/h BTW cooler(s) 2 external Thanks for your thoughts Rolf Zell
Response:
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