TRD/ Magnuson 4.0 Supercharger Tips, Tricks, and Mods

I’m running amsoil in my rear diff with some lsd additive, no complaints yet. Honestly I love amsoil for their little squeeze packs so I don’t have to use a pump.

 

To give an update here and close the loop:

After some more research, cost analysis, and talking with ECGS, I've decided to put the dino 80w90 in the transfer case and dino 85w140 in the diffs. Thanks to all for your opinions! Almost went with the Redline heavy shockproof in the transfer case, but saved ~50% with the Lucas dino oil.

 

I run the Lucas 85W-140 in the diffs and change it every 50k kms (30k miles). Last time I used it in transfer case too. My truck is a heavy one, on 35s, boosted, and sometimes tows an atv trailer. No issues yet.

 

Thanks for your perspective and input! Our trucks seem similar, mine is heavy heavy and 35s too. I really think it is of no real consequence on the weight of oil you use in the gears/boxes, heavier could be better even in the transfer case. Being in Phx AZ area I arguably could benefit from the thicker oil in the transfer case. But I got a deal on 80w90 and gonna run it. Maybe next time I'll use the same oil in all 3 locations. On the other hand, synthetic or dino for gear oil is a very hotly contested issue. Many pros saying dino, and many of the extreme performance folks, race teams, etc using high end synthetics when cost is not an issue.

 

ive run lucas and redline. both fine products for me. redline is pricey. i use it in the rear diff as it sees my right foot stresses.

 

Truetrac's apparently need the little bit of increased friction from Dino oil to function at their best.

 

I haven’t noticed any issues with my TrueTrac with Redline 75W90 full synthetic gear oil.

 

They work fine but Eaton has always stated regular Dino for optimal performance. The synthetics are a little too slippery for the worm gears to work at their absolute best apparently. I've never run Syn in mine so no personal point of reference.

 

Harrop Tundra on Premium out of TX.

Red - Other Tune
Green - Overland Tailor Tuning



Not a whole lot of fat to trim, but we found some.

 

That chart seems weird with the x-axis. Isn't it usually in RPMs not MPH? So what I see is that in "daily driving" not "in Mexico", you're about 375hp at highway speeds to drop a gear and pass on a mountain pass, not the 487hp peak.

 

This was done at a independent shop. We were not running the dyno, or the truck. Simply provided the calibration. The shop did not take the time to setup the inductive pickup to measure RPM on the baseline run. So to do an overlay we had to do it via speed.

Our run is a ~2500-6000RPM WOT pull in 4th gear. Just has a speed axis instead of RPM. You can configure whatever your axes in WinPep however you'd like.

You'd need a load bearing dyno to measure the actual force to the wheels in steady state at a cruise RPM. This was a simple inertia dyno that's only able to (consistently) measure output by measuring the rate of change of a fixed mass (the drum)

 

Someone buy this so I can start work on the Tundra lol

https://www.jeepforum.com/threads/project-resurrection-jk-rubicon-bought-at-salvage-auction.4460077/

 

Currently reside in Denver, but moving to Tennessee very soon. I use the bullydog tune and installed a 2.85 pulley to compensate for the altitude. That being said, now, soon, that I will be at ~500' above sea level, would a revised tune be recommended in the near future?

 

A tune PERIOD is strongly recommended in the near future. Those Bullydogs tunes are confirmed junk.

 

Yeah I’ve been a contributing member on this thread for the past few years. I know how the BD is viewed. The only issue I have with it is with partial throttle going up a hill. I have full intentions of switching to HP tune courtesy of JustDSM.

Anyways, other than the BD being bad (let’s assume for a moment it’s good for argument sake) would it be advised I adjust my tune with the change in altitude and smaller pulley?

 

It's only 500 ft. in altitude change. It shouldn't be enough to affect the tune, but I'm not a tuner so that may be a question better directed for Justin @JustDSM

 

More around 4500-5000’ change in elevation (Denver to Nashville)

 

I guess it really depends on the BD tune. I know BD has a bad reputation, but i dont recall if its excessively lean or rich.

2.8 pulley at sea level should be fine.. thats what im using but with an upgraded fuel pump and OVT tune.

But what is the partial throttle uphill issue that you mentioned? Pinging, detonation?

If it is due to pre ignition detonation, i wouldnt rely on the BD tune at sea level with the 2.8"

 

The truck goes lean during a prolonged uphill drive. The throttle will be around ~20% and shortly after the start of the climb the AFRs start to climb. So I have to lift off the gas for the AFR to go back to stoich. This happens whether I’m using cruise control or pressing the throttle myself.

 

Yes, i think we would all recommend a revised tune if the above is already happening.

I would think if it runs lean under load in high altitude, then it would be worse at lower altitude where there is more oxygen.

But I'll defer to the guys with more experience in VE and ecu tuning. @JustDSM