I use royal purple in mine and also in my the 6.0L in my jeep with no issues. No leaks or weird effects with that fluid in the Lexus or the Jeep with full hydro steering. The Lexus has a log/ heat sink style cooler behind the front bumper too
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I like the idea, just curious how to tell if it is "engaged" or not. It would be nice if there was a light output from the ecm . Maybe there is a momentary switch that has a latch to keep it depressed until you push it again.RE: tow/haul - it shows up in HP Tuners as 'performance mode' in the tables. Essentially it's two tables (one for standard and one for performance). The standard table is the default and the performance is activated by using a momentary push button switch to ground a circuit. The PCM will then switch to this table until the button is pressed again or the ignition is turned off (which resets back to the default standard table). I don't know if this is the same process with the GEN4 PCM.
I'd think that the pump is much more sensitive to what type of fluid is run in it since it spins at a relatively high RPM. The box not so much since none of it's parts move terribly fast. I'd run what the pump calls for. IMO, If your box has 300k on it, it deserves a reseal/rebuild anyway.
I use royal purple in mine and also in my the 6.0L in my jeep with no issues. No leaks or weird effects with that fluid in the Lexus or the Jeep with full hydro steering. The Lexus has a log/ heat sink style cooler behind the front bumper too
I like the idea, just curious how to tell if it is "engaged" or not. It would be nice if there was a light output from the ecm . Maybe there is a momentary switch that has a latch to keep it depressed until you push it again.
The pump is basically the same thing as the pump in an automatic transmission. The AT pump spins at Engine RPMs, but has a much larger impeller so speeds at the seals may actually be greater than in the PS pump which is slightly overdriven but has a much smaller impellar. On top of that, conditions inside the saginaw are pretty much like that of the toyota PS pump. Based on what I know about ATF I'm guessing the only significant difference between it and PSF is it has friction modifiers to work with the clutch packs in a typical automatic transmission. Otherwise the demands on the fluids would be really similar. That said, I understand GM could have specified seals in the PS pump that are designed to work with the specific components of PSF and ATF may not play nice with them.. but again, I'd rather rebuild the pump. IMO my PS box being old isn't a good reason to use the fluid less likely to be good for it. Even if it were new based on the cost and complexity of rebuilding (I can do the pump at home.. not the box) I'd still choose to replace/rebuild a few pumps before a box.
Power steering fluid from Royal Purple Is " Max EZ with synerlec High Performance Power Steering Fluid and Conditioner"The pump is basically the same thing as the pump in an automatic transmission. The AT pump spins at Engine RPMs, but has a much larger impeller so speeds at the seals may actually be greater than in the PS pump which is slightly overdriven but has a much smaller impellar. On top of that, conditions inside the saginaw are pretty much like that of the toyota PS pump. Based on what I know about ATF I'm guessing the only significant difference between it and PSF is it has friction modifiers to work with the clutch packs in a typical automatic transmission. Otherwise the demands on the fluids would be really similar. That said, I understand GM could have specified seals in the PS pump that are designed to work with the specific components of PSF and ATF may not play nice with them.. but again, I'd rather rebuild the pump. IMO my PS box being old isn't a good reason to use the fluid less likely to be good for it. Even if it were new based on the cost and complexity of rebuilding (I can do the pump at home.. not the box) I'd still choose to replace/rebuild a few pumps before a box.
Again, my opinion. Others are welcome to disagree.
What product from Royoal Purple? And I'm ditching the paperclip cooler for a real heat exchanger while I have the systems open.
Problem with a momentary switch with indicator light is it would need to have a way to reset if it's on and you cycle the ignition, which is what the ECM would do with this mode, AFAIK.
part # 01326
the cooler I used is from Derale , part # 13260, it is a 2 pass heat sink type so the fluid go in and out on same side. I mounted it on the front of the cross member where the factory cooler was. I used all Aeroquip pushlock hose and #6 fittings for my power steering return lines, fuel lines and trans cooler lines. I like them on my off road stuff because they are easy to work with and repair in the field. I can carry a spare length of hos and use it to fix any of theose lines by cutting the damaged line off the fittings and push on a new hose. Just what works for me. As it turns out I have never had to replace a line out in the field, go figure
What product from Royoal Purple? And I'm ditching the paperclip cooler for a real heat exchanger while I have the systems open.
I didn't use the #6 fittings on the cooler only because I didn't have any more at the time and it came with the 3/8 barbed fittings which are the same size. If I ever take it apart I will put the pushlock fittings on the hose at the cooler and use the 1/4 pipe to #6 adapters on the cooler instead of the barbed ones. I ran the hoses under the radiator and up to the box and pump instead of using the factory "pass through" pipes because it seamed to fit better and was 4 less connectionsThree stitches in my left eyebrow. Building an exhaust from the headers back is a pain in the ass without all the tools a pro would use.
@Squad1 have any pics of that PS cooler setup? I see the cooler online but am curious how you routed the lines
Also do you get your pushlock hardware locally or online? I was interested in the stuff for those lines but hadn't really started looking for a source yet. Though with wanting to get the truck done for vacation in 2.5 week on the cooler instead of the barbed oness I better get on it.
(I can do the pump at home.. not the box)