AH64ID

Sucks! Toyo used to be a great brand and they sure charge for their name, but they haven’t been what they use to be for at least 10 years. I’m not nearly as impresssed with my Toyo 19.5’s as I should be. I hoped that jumping into the medium duty line would get me different results but it hasn’t.

How are the AT2’s wearing? AT1’s wore like butter on hot corn.

Funny. The older I get the less I like chrome and polished wheels and the more I like black... thou I did start painting my wheels black before it was popular, or an OEM option.

The oil feed comes from the filter housing. The drain goes into the pan at the bottom of the block. Maybe the white box is aftermarket? Go genuine Holset.

Small one is oil feed and large one is oil drain.

Those are one of the last tires to hold their original rating. Based on what I’ve seen and researched I don’t expect it to last long. My dad runs that tire as his summer tire since he hauls a slide-in camper and needs the capacity. He hopes they hold onto the rating but we aren’t holding our breath. Toyo 285/75R17’s used to be rated the same. They no longer are.

When you let off the throttle you’re getting below the threshold of TPS for that TOS, so it shifts. Yes load increases for a given TPS, which generally means that you use less TPS for the same acceleration. Lower TPS means a sooner 3-4 shift. While I can’t see the tables for earlier than 04.5 your transmission is doing exactly i what would expect for your current tuning and tire combo. Is there anything in quad that lets you adjust the fuel at a given TPS? I agree on the tires and the standard TPS table, but I’m not sure it’s a bandaid... at least with current tuning options. If the pre 04.5 trucks ever get trans tuning then it could be a real fix, but until then adjusting fuel:TPS is as good as it will likely get from a tuning standpoint. Mechanically 4:10’s would do wonders :-)

The TPS signal won’t change, what I’m fairly certain the Smarty does is command more fuel at lower TPS values so with the Smarty you’re getting 50% fuel at 30% throttle... just arbitrary numbers to make a point.

It has to be something with the TPS signal. Likely the smarty commanded more fuel from less throttle, which means the OD shift would happen sooner for the same acceleration rate. I’m tuning an 06 now that is going thru the same thing. We switched from a S-JR UDC tune to a UDC Pro tune and it shifts into OD later. I’m working a retune for his 3-4 shift this weekend.

As far as I can tell yes. If there is anything else it's minor.

Gov pressure shouldn't have any impact on the 3-4 shift. The 3-4 shift is all electronically controlled and the trans stays in 3rd gear but the OD module is activated. Do you have any tuning that impacts throttle sensitivity? This can effect shifts from what I recall.

That could be a gov solenoid, but I agree that throwing parts at something sucks.

Gov pressure increases as TOS speed increases and it is what determines the 1-2 and 2-3 shifts. Are those happening correctly? On 3rd gen 48RE's the Gov pressure is set to go to 127 at 1800 rpms for the TOS and then stays there, which is why it stays in 3rd gear. The WOT shift pattern waits to go to 127 until 1920 TOS rpms. Your desired pressures seem to match 3rd gen pressures, but as you noted the actual pressures are quite a bit off. For reference this is a 48RE from 2004.5. It's reference only, but from the looks of your screen shots it's pretty close if not the same. Here is the relationship of throttle to the 3-4 shift on a 48RE. Based on the gov psi similarities I'd guess this is pretty similar too.

trans output shaft

I believe that TOS speed vs throttle is what's used to determine when the trans will shift in OD, which means speedo calibration doesn't have much to do with it. The higher the throttle the higher TOS is needed to shift, which is why it will shift if you release the throttle.

Hmmm.... At those temps the fuel under hood should be warm, meaning the VP should have no issues compressing it but no white smoke means no fuel. Did you verify the pop on the injectors or just assemble them?

What’s the chance the remote start isn’t waiting long enough for the grids?

I don’t know why you would. All HD trucks have full floating axles. The only firment issue I know is for those with manual hubs up front. Only the steel 18’s fit without machining.

17’s are rated for 3195# Over the last few years all the oversize, 285 etc, tires have been dropping to 3195. There are a couple still above 3195 but I suspect they will change to. Its not that the tires are weaker, but there is verbiage in the national tire reg (forget its exact name) that limits 17’s and apparently it’s being enforced as 17’s are dropping. My brother and I both ran different mfgr 285/70R17’s. They used to be 3750# but now they are 3195#. He actually had to get one replaced under road hazard and has 3 3750’s and 1 3195.

My dad bought a set of 18” 4th gen steel wheels for his 06 in Nampa for $250. I didn’t measure them, but the offset appears the same as the 3rd gen wheels. The 4th gen body is wider thou.

Is the Ford fuse box installed? You should be able to tap into the OEM wiring harness for things like ECM and fuel pump power. Are all the pigtails from the harness connected to sensor on the engine? All the sensors are utilized but some are vital.

Personally I’d look for 4th gen 18’s. 17’s are weight limited more than 16’s and 18’s, it’s BS but it is what it is. You mentioned a bed full of firewood, so I’d go for at least 7K of wheels/tires which you won’t get with 17’s.

1. Yes, but see #3 2. No, but you need to ensure everything’s properly fused with the Ford box. 3. No, all the sensors need to be from the year of the ECM, and hooked up to run.

Was it making white smoke while you were cranking?

Most 5er are 5th wheel due to the simple fact that they are easier to hook up for most people. 5th wheels also don't generally leave the flat smooth surfaces of a paved road, which means they don't need the atriculation that a GN can provide when on back roads, ranches, gravel pits, etc. GN/5th wheel sure to tow nice, but the tugging feeling in the small of your back takes some getting used to. It makes the truck feel weird when you hit bumps and rough road.