1BadMoFo

iTrader: (1)

Hi, when towing my 7,000 lb camper with my 2004 Yukon Denali XL, the trans temp runs between 200 and as high as 230.

I never got any warning lights, but that seems high to me.

I was going to drain, flush, then refill with something good like Royal Purple, but was thinking I should also get a bigger trans cooler.

What do you think? Is 230 something to worry about?

This trip was ony 2 hours each way. In a month I am going 6 hours each way and want to make sure I am good to go.

Thanks, Scott

brianfromhawaii

iTrader: (3)

The lower you can keep the trans temps, the longer it will last, thats pretty normal IMO but why not for a few bucks make it run MUCH cooler?

araber89

iTrader: (3)

My 2500HD runs 180 at the hottest. Maybe 200 if its really hilly but it is never there more then like 5 minutes. mine actually runs like 150 just normal driving.

nitr0racing21

iTrader: (5)

honestly just get a little trans cooler its all you really need

slayerized6

iTrader: (12)

7,000lbs is a lot of weight to be towing. i would defintly invest in a better cooler and do tranny maintance more often

1BadMoFo

iTrader: (1)

it already has a trans cooler, but it is tiny and I cannot find a larger one from GM so I'll have to look aftermarket.

slayerized6

iTrader: (12)

B&M makes good coolers

SOMbitch

iTrader: (8)

I have a 24,000 lb cooler on my 99 truck in addition to the Z-71 cooler and am approaching 200k with no probs. I tow a 3500lb boat fairly frequently in the summer... I hope I didn't just jinx myself cause I gotta do a rear in the car soon and would have to make a choice if my truck tranny blew....