What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[gooffeyguy]

I've noticed that my trans temp runs a bit warmer since I changed my fluid and filter a couple weeks ago.

I really didn't pay much attention to the trans temps in the weeks leading up to the fluid change, but compared to last summer the trans temps are higher.

Last summer on the trip to NOLA, then to Destin, and back, the trans temp only hit a high of about 175* and stayed mostly in the 155-165* range on the highway.

The past week I've noticed it'll get up to 185-190* with it being 90-95* outside, and this morning when it was only 75* it stayed right around 160*.

I know this temp range falls in the normal range and well below the limits, but just kind of curious why it's running 10-15* warmer with fresh fluid, unless the old fluid had some additive in it.

I'm still planning on installing a larger cooler. I don't think I'm gonna go with that huge Tru-Cool 40k, but maybe with the Hayden 698 with the built-in bypass.

 

[PG01]

BoatView attachment 251209

That’s a truck, not a boat..... duh

 

[Chert_Detective]

Dropped it off at the shop for Yukon Gear and Axle 4.11s in the front and rear along with full rebuild kits. Last piece of the puzzle aside from front limiting straps.

 

[Doubeleive]

Dropped it off at the shop for Yukon Gear and Axle 4.11s in the front and rear along with full rebuild kits. Last piece of the puzzle aside from front limiting straps.

what was the total estimate for the re-gearing

 

[avalonandl]

EDITED

The trans temp never over 218 while towing the boat. Mostly around 212-214 although at one point it was hovering around 196-198.

I set the shift lever on M4 so i kept the revs up and of course Tow/haul button engaged.

 

[CaptainAmerica1]

Mine got to 209* with no cooler and ambient around 98 or so...

 

[avalonandl]

Boat is in the lift and my mpg was about 7 but lots of stop and go. Denali handled it ok.

 

[PPV12HOE]

That’s a truck, not a boat..... duh

I think he was referring to the dinghy sitting behind the truck...

 

[avalonandl]

I think he was referring to the dinghy sitting behind the truck...

35 ft dinghy w twin merc promax 300’s that suck fuel like a frat house sucks beer at a kegger. Temp was 90 today in detroit area. Once i lubed up the surge brake slide it braked much better.

 

[iamdub]

Took it to my guy a few towns over for the inspection sticker. They don't hassle me about my tint and he has a twin turbo F-body he's been building and is finally in the T-N-T stages.

Anyway, I no longer have to take a detour when I see a cop!