Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

[haulnazz15]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

ok, sounds like I need to look to see what is actually installed on my Toyota, the only extras I know off hand is the TRD package but maybe there's more....

It happens for a lot of 2WD vehicles on slippery ramps. I actually recommend putting it in 2nd gear if the wheels start slipping. It lowers the gear ratio and makes it easier to "creep" up the ramp without the wheel spin.

 

[marekli]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

well, it sounds like besides a few things to do while driving (2nd gear e.g.) I need to understand my vehicle better since one consideration was to upgrade to a longer cabin cruiser which obviously puts even more weight behind the truck at the launch ramp. Any recommendations for possible after market upgrades with this (safety) issue are appreciated too....

The tow rating for the truck is 10K lbs, is there a better more reasonable towing limit? There's also the additional weight from the trailer and loading the boat to consider....

 

[Alwhite00]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

It happens for a lot of 2WD vehicles on slippery ramps. I actually recommend putting it in 2nd gear if the wheels start slipping. It lowers the gear ratio and makes it easier to "creep" up the ramp without the wheel spin.

A lot of the "newer" vehicles will not start out in second even if the selector is in second - It will still start out in first & shift to second. It might say in the owners manual.

LK

 

[jkust]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

A lot of the "newer" vehicles will not start out in second even if the selector is in second - It will still start out in first & shift to second. It might say in the owners manual.

LK

I've recall seeing one recently that you can force to start out in second for slippage reasons as opposed to having it start in first but not allow it past second as how I think of D2. In addition, I've seen the videos comparing all the truck brands and their slip control systems while 4x4 was shut down. I.e. open diff's versus mechanical locking, versus mechanical limited slip versus computer controlled LSD. The computer LSD didn't fare as well as the mechanical locker. GM pushes their mechanical lockers (but technical the newer suv's and trucks also simultaneously have the computer to limit slip as well) I've never quite understood how all the systems are able to work together.

 

[rallyart]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Short box and crew cab will help with rear weight so that makes it slip less. The TRD package puts it a bit higher which means more weight transfer to the rear on a ramp which helps a bit more. I would think it will have a limited slip diff with that package which should help a lot but I'm not sure. If it has LSD then one wheel may slip a bit before it kicks in.
You can lower tire pressure a bit if the slip is a problem. Having someone sit in the back of the box when you pull out will help a bunch

 

[marekli]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

someone else suggested lowering tire pressue too, how low are you suggesting, 5-10% e.g.?

Short box and crew cab will help with rear weight so that makes it slip less. The TRD package puts it a bit higher which means more weight transfer to the rear on a ramp which helps a bit more. I would think it will have a limited slip diff with that package which should help a lot but I'm not sure. If it has LSD then one wheel may slip a bit before it kicks in.
You can lower tire pressure a bit if the slip is a problem. Having someone sit in the back of the box when you pull out will help a bunch

 

[haulnazz15]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Some vehicles will not lock out first gear when in "D2 or 2", but most trucks/suv's will, in my experience. A lot of cars tend to limit the gearing to 2nd gear, instead of locking out 1st. I can't attest to his 2007 Tundra as I haven't driven one. But it's worth a shot, and is usually much easier than dropping tire pressure into the low 20's or teens, then having to air them up again.

 

[jkust]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

OP, what kind of ramp are you lunching at? Shallow, deep. Are you using a bunk or roller trailer?

 

[Thalasso]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

TRD stands for Toyota Racing Development. The 07 with the tow package will have limited slip and 4:30 gears with a 6 speed auto..Mine will slip the wheel at the ramp sometimes but i am pulling 12000 lbs out.Tires will make the diff. in yours not having four wheel drive.

 

[moosehead]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Short of having 4WD for ramps and your 23' load, the above suggestions are solid. The only other insurance I can think of is perhaps to have a front winch should you end up solo on a snot slick algae infested steep concrete ramp. Or mud. Or ice.

 

[marekli]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

another guy on a Tundra forum said the traction control system should kick in without stepping off the gas even on a 2WD model and suggested maybe adding 100-200lbs tongue weight. He has the same Tundra model and regularly pulls his boat which weighs 9.8K lbs out of the water and helped a friends boat that weighed in at 11.8K lbs...maybe I just need to be more patient with the traction control system??

Short box and crew cab will help with rear weight so that makes it slip less. The TRD package puts it a bit higher which means more weight transfer to the rear on a ramp which helps a bit more. I would think it will have a limited slip diff with that package which should help a lot but I'm not sure. If it has LSD then one wheel may slip a bit before it kicks in.
You can lower tire pressure a bit if the slip is a problem. Having someone sit in the back of the box when you pull out will help a bunch

 

[hungupthespikes]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

If the setup is good.
UTQG Traction Grades are AA,A,B, and C . AA is the most traction. Check your tires to see what you have.

Lowering air pressure will help a lot. (old school, when most used cars)
You would over fill the full size spare, and a home made hose with fittings to inflate the rears before you headed home.

When we go to the 4x4 beach in SC I run 20lbs or less on 35 lbs. truck tires (f150) all the way around, in order to get thru the wet sand. There are no roads just sand and we run 8 miles down the beach/surf to get to the rental.
Great place to get away from everything this time of year. (wife loves the wild horses)

Lowering the psi makes a world of difference in the sand, and it will help on the ramps.

Just don't drive home until they are back up to specs. :facepalm:
huts

 

[lrak]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Don't know about the Tundra but I can tell you the original tires that came with my Tacoma SUCKED on wet pavement. It wasn't much difference driving on rainy roads vs snowy roads until I got decent tires.

 

[smokeonthewater]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

MORE TONGUE WEIGHT!!!!!!!

Makes all the difference in the world.... at 8% my 28'er absolutely required 4wd even bone dry in my crewcab dually powerstroke truck but at 12-13% it walks up in 2wd even on a wet ramp without even a hint of slippage

 

[Frank Acampora]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

You may be in a situation where the limited slip just doesn't kick in. Left foot lightly on the emergency brake or right hand on it will equalize load on the rear wheels as you apply gas, acting as a locking rear. This has the advantage that front brakes are not dragging so all power goes to pulling out the boat.

If you really have problems, a couple of people in the bed will also help.

 

[H20Rat]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

If
Lowering air pressure will help a lot. (old school, when most used cars)
You would over fill the full size spare, and a home made hose with fittings to inflate the rears before you headed home.

lower pressure helps on sand, but actually reduces traction by quite a bit on pavement.

 

[Alwhite00]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

What is the tow rating on a 5.7 Tundra?

LK

 

[Home Cookin']

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

are you backing in so your truck tires are in the water? that could be the problem. Keep them dry and use the winch

 

[Georgesalmon]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Gee, Whizzzzzzzzzz,,,just throw some sand bags in the truck bed and go boating.

 

[haulnazz15]

Re: Launch Ramp Issue with Toyota Tundra 5.7L, TRD no 4WD

Gee, Whizzzzzzzzzz,,,just throw some sand bags in the truck bed and go boating.

I second the motion. If the tire(s) are slipping just a little bit, it's no cause for alarm.