If you’re afraid that using your heater is going to affect your fuel economy you’re
. AC yes, heater no. Your engine is already producing the heat, if you use it or the radiator has to get rid of it- either way it has to go somewhere.
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
- Start date
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. AC yes, heater no. Your engine is already producing the heat, if you use it or the radiator has to get rid of it- either way it has to go somewhere.
R3cord303
Posse In Effect
It just makes it easier to see what MPH to put into HPTuners for upshifts. You have to put in a MPH and an RPM for each gear and a shift speed and a shift pressure and whatnot. Biggest thing is mph and rpm.
They’re not matched though, because the ECM/TCM aren’t fast enough computers for that. First it watches your speed, and after the specified mph is reached then it looks at engine speed, and once it sees that at whatever throttle percent you’re at, (separate table for partial throttle and WOT) then it will actually start your shift. Then you have to take into account with the shift speeds and pressures that the 4L60e is a slow shifting transmission, and the ratios are far from close, so you have to taylor your settings to that (and to some extent the mph/rpm splits for that as well.
This might not sound like a lot going on to you but it does to me. Especially because I’m not a tuner, which is why recording the cluster helps me dial it in.
pwtr02ss
Full Access Member
You've done your research on this so I'm asking you. Can you leave the stock cam and change over to LS-7 lifters to do DOD delete or do you have to change to a non DOD cam?
R3cord303
Posse In Effect
You have to get a non-dod cam. GM does sell the stock cam in a non dod flavor though, but its the same price as an aftermarket bigger cam, but you would have to pay for a tune from someone like Blackbear.
Yes, I saw something there but it looked like a piece of retread tire which is pretty typical around here when I heard the bang sound I was kind of surprised since rubber will make a less pronounced noise
pwtr02ss
Full Access Member
Thats what I was thinking. I'm trying to avoid pulling the cam and hoping for a few more miles with just changing the lifters. I have HP Tuners so the tuning wouldn't be an issue. The DOD is already turned off. If I'm changing the cam, I'll do something to get a little more power at cruising speed. Not really wanting to do all that work though. It just has lifter rattle at start up and a tick after it warms up
I’m glad I let Blackbear tune mine, they dont require me to record anything other than a datalog of me out driving around which is stored in the Autocal and emailed to them. As far as a 4l60 being a slow shifting transmission, that’s only the case in its stock configuration and with torque management. My level 3 Performabuilt shifts fast and hard, faster than I could if it was a manual. Torque management has been removed. I’m sure the converter matters as well, it’s a triple disc billet by FTI with 2800 stall.
found a running board for $150 and splash guard for $30 just have to go pick them up in Sacramento, cheaper than my $500 deductible.....
Plus no claim on your record.
R3cord303
Posse In Effect
I 100% agree. Mines been rebuilt once before. When Grandad had it he blew the band out of it because he doesnt stop before going from R to D. When the shop rebuilt mine they did some generic shift kit, a vette servo and I think the 5 planet gearset. It shifts faster than my s10 did with a stock one and a bit firmer too. The tuning for sure helps too its just a pita
