Rear tire sliding

I’ve posted recently about a problem with rear end sliding or slipping on the slightest wet road. Truck is 2005, 4 foot, short bed 140,000 miles I’ve added weight, lowered rear pressure to 29 psi. Tires are nittos 265/70/17 with about 10,000 miles on them. They have A rating for temperature, A rating performance I believe. My son said the tires have a 600 on them, something about the hardness of the tires. Would going down to a lower softer tire based on the number help with the skidding?
Also, can I install tundra calipers and rotors for better braking. And tundra shocks for better ride
My youngest son has a 2019 Tacoma and he said my brakes were crap after he drove my truck

 

How many years old are the tires?

 

Motor? Tire age? Heavy with right foot?

 

Both my 1st gen, and my current one ...I can break the rear end loose, at will, on wet pavement. Especially when the tires were 5+ years old.
And...because your son says your brakes are crap, doesn't make it so....could be different peddle feel from his.

 

A 265 is a pretty wide tire for a light truck. Wide tire = fewer pounds of pressure per square inch of contact patch. Know anybody with another Taco and a spare (maybe narrower) set of wheels & tires you could try swapping on? That would be my first test.

 

Change the rubber first, then go from there.

 

Well...265's are pretty standard on our kit.

 

Get some better tires.

 

Try a few hundred pounds in the bed.

 

Agreed, but they're actually the optional / upsize tire option on F-150's. Still a lot of tire for a relatively small truck. I actually run 235's for the winter to prevent floating up and over the hard packed snow.

 

Agreed...narrower tires are better in snow.

And...on some vehicles they look better!

 

What model of Nitto tire are you running?

 

I'm having the same issue with my '15 DCSB with the auto transmission... I'm running 265/70-16 BFG Rugged Terrains...

Trying to start off on wet pavement on any kind of incline is iffy at best.

I figured it was just because of the cheap Walmart BFGs, but I'm running the same tires on my Jeep with no issues...

I haven't had this problem with my '06 DCSB with the 6 speed manual... I'm running 265/70-16 BFG Rugged Trail tires on it.

-Bear