You might find this thread helpful... I certainly did

 

i have decided to order a cooler from b&m and pray i can keep a transmission in this thing

 

I forgot to post the stinkin' link https://chevroletforum.com/forum/tah...install-35484/

 

what other mods do you have done to your tahoe?

 

Not a lot really, I have added a second battery to the empty tray in the front https://chevroletforum.com/forum/tah...ay-3963/page4/
I replaced my oil fill cap with a Mobile 1 5w-30 only cap...
I used to have all kinds of mods on my 93 Step side and a few less on my 97 Tahoe but when i got my 07 Tahoe I found that I liked spending that money on going places and doing things...

 

it is not common for these to go out like that - but there is no question the 4 speed in the 07 and 08 is not the toughest out there. it has been around FOREVER and these vehicles put out about the top end of power for it to handle over a long time.
and honestly it sounds like you drive it very hard so that will not help at all

 

i admit i have put some hard miles on it but honestly i expect a little more out of this car. i have a 1990 chevy 1500 with a 350 automatic tranny i think it has the 700 r4 and its tougher than the tahoe it has 380k miles on the original motor and its on its 2nd tranny i put it through the same stuff i put the tahoe through and it holds up.

 

how much power does the 5.3 put out just outta curiosity

 

I agree, but still 3 transmissions in 100k miles is a major deal. that 1990 has a 3 speed (I think because I used to have the same exact truck in single cab form), the 350 V8 put out all of 210ish horsepower and about 275TQ vs 320HP and 340TQ for the Tahoe and it weighed 3850 lbs for the short bed single cab vs your Tahoe weights 5200lbs or more easily.

what I am saying is the Tahoe is a different beast when it comes to stresses put on the drivetrain when compared to your 1990 truck. So you cant go "all out" on it like you could the old truck or something is going to break (your transmission probably)

go hook up a 5k load to that truck now and try to keep up on the highway. you will see the Tahoe can pull a ton better even with pulling around 1400 more lbs of its own self

I will admit I did love my 1990 Silverado with the 350 - it was pretty dang quick being a single cab/short bed

 

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Breanne
Chevrolet Customer Service