Charlie207
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What sort of frequeny (time/miles?) do you swap out the ATF fluid?
What did you do to your NNBS GMT900 Tahoe/Yukon Today?
- Thread starter phattyford
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What sort of frequeny (time/miles?) do you swap out the ATF fluid?
this is what I put on mine
B&M 70392 B&M Hi-Tek Deep Transmission Pan - Aluminum - 6L80E
Our Hi-Tek deep transmission pans are constructed from A356-T6 aluminum and are cast with thick internal and external fins, adding additional strength and increased cooling properties. The deep pan design increases fluid capacity by 2 quarts over the stock O.E. steel pan. All these features...
www.holley.com
I flush mine annually just for good measure.
we were just out shopping for a k2 for the wife, checking the fluid on used vehicles, yep most of them looked brown. only found 2 that were pink color and bought one of them
Onlyone
Full Access Member
Whenever you just want to feel good about it. Lol It’s cheap enough so maybe annually or after towing heavy. I did 18 quarts over a couple weeks. Nice and red. I’ll probably swap another 6 in a few weeks. I’ve been running back and forth to Salt Lake lately about 460 miles each way. Ive been pretty rough on it. Manual shifting through the mountains.
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Charlie207
Full Access Member
I've been trying to get a holistic answer on the differences between letting the brain-box shift vs. manual shifting (I'm a three-pedal kind of guy) and no one really has any details on what the big differences are. Is it that much more taxing on the transmission to thumb your own gear ratios?
But, more importantly, is there a way to speed up the manual shifts? Downshifts seem to happen when you hit the button, but upshifts take forever to respond.
Onlyone
Full Access Member
For me, it’s slowing down from 80 down several twisty 7% grades. Lol. The grade braking does a great job and the shifts are quick and crisp. I don’t notice a difference from upshift and down. The 6.2 is a beast and pulls hard up hill. I don’t see any advantage to manual shifting in normal highway, or in town driving.
On a side note, I hand calculated 18.54 mpg on this trip up here on 91 octane and 15.7 last trip on E85. I’m running 91 at the moment because it’s tough to find E85 on a whim while on the road. The E85 did a fantastic job cleaning this thing out. It runs sooooo much better after 3 trips up here since about 6 tanks of E85 and while I’ve been running it at full throttle to redline a whole lot in the mountains.
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gooffeyguy
Tom
One reason I installed a remote spin-on filter the last time I removed the pan and cleaned it out and replaced the internal filter. I change the remote filter annually and let's me go longer before replacing the internal filter
Charlie207
Full Access Member
I've seen this before. Do you have some photos or a parts list of what you used.
I like the idea of being able to easily/quickly swap out an external filter to gauge the quality of the ATF fluid.
Did you just splice one of these kits into the flexible hose for the external ATF cooler? I assume the AT pump would be strong enough to pump the fluid up to higher location in the engine bay, like the empty 2nd battery tray area?
or
RooTBeeRthe1st
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If anything, I would think it's easier on the trans to manually shift, because you're going to hold whatever gear you want for however long you want rather than it shifting back and forth and hunting and locking/unlocking the converter constantly.
Only downside is, definitely get worse MPGs because you will likely be running higher RPM for the majority of the time compared to letting it do its own things.
Have been manually shifting mine nearly daily, and could probably count on my hands and toes the amount of times I drove it and didn't floor it at some point over the last 80,000 miles (I'm @ 180k) and it doesn't seem to care, but I also did a bit of a trans tune on mine so that could play a big part of it.
Cleaned my throttle body. TB itself wasn't bad but the plastic entry behind it was quite dirty. Used the clone Tech2 to relearn idle. Engine seems to run smoothly. no misfires.
Was getting a P0113 + CEL for IAT low / high voltage prior to cleaning the throttle body. That P0113 appeared ever since I put on a new junction box. Tried cleaning the MAF with MAF cleaner and still could not clear the code. I found some videos on how to test the MAF and will be doing that soon.
Was getting a P0113 + CEL for IAT low / high voltage prior to cleaning the throttle body. That P0113 appeared ever since I put on a new junction box. Tried cleaning the MAF with MAF cleaner and still could not clear the code. I found some videos on how to test the MAF and will be doing that soon.
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gooffeyguy
Tom
Yeah, basically.
I mounted it along the frame rail in front of the motor on passenger side. It fits behind that splash shield. Basically cut the rubber part of the hose (can't remember if it was the send or return off the top of my head) and plumbed it into a remote filter housing with hose barb adapters.
I use a Wix 51269 filter which is made for hydraulic pumps and has no anti-drainback valve. The fluid in the factory lines and cooler drains back to the trans when it's shut off.
The hose worm clamps cause a bit of seepage in the winter time, so I plan on changing them to spring type hose clamps. I also picked up two 3/8" compression to hose barb fittings and plan on cutting the metal tubing just before where it transitions to rubber hose and run a bit longer length of rubber trans fluid lines to the filter. There's currently not much play it the hose connections.
Charlie207
Full Access Member
Awesome thanks for the pictures. Which remote mounting kit did you use, the PermaCool?
gooffeyguy
Tom
Technically I didn't use a kit, I just bought a remote filter housing and a couple of 90* npt adapters and npt to barb fittings
CMoore711
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@gooffeyguy Kinda off topic but your frame rails and underbody look great! What’d you coat it with?
Almost.....lost her this morning, went to pass about 4 mules holding up the fast lane and some yahoo decided that was a good time to move into my lane, had to thread the needle cause I proceeded as intended m-f'er oowee, hope that guy had to change his undies 
CMoore711
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I’ve been there @Doubeleive. I drive a 55 mph state route to work every morning and the amount of people who drive 45 mph amazes me… Do they not pay attention to the signs on the road? Then honk at me while I’m passing like I’m the a$$hole… SMH. I just wave and blow them a kiss.
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lol, he sure moved back into his lane real fast when I looked in my rear view.
iamdub
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Almost.....lost her this morning, went to pass about 4 mules holding up the fast lane and some yahoo decided that was a good time to move into my lane, had to thread the needle cause I proceeded as intended m-f'er oowee, hope that guy had to change his undies
Somebody needs a train horn.
I have a police horn and the controller, some day I want to hook it up and just use the police horn/buzz function (not the siren), not trying to perpetrate lol
the speaker is heavy as hell. I figured I can stick the controller behind the center console and solder a wire to the horn function and put a button in the cubby on the dash that is vacant where the 4wd switch would normally go
I wouldn't have had time to use it today anyway I was lucky we didn't rub shoulders
