Info needed: Today I was driving up a grass - Page 2

Tackelbarry · 05-16-08, 05:40 PM

Quote:

Originally Posted by e9999

I do realize this is not the point of the thread and don't want to hammer on you, but for newbs maybe wondering, I feel compelled to add that the 50-60 degrees part seems highly unlikely to me, especially in High with CDL unlocked on grass and if it's anything more than a short distance that can be gunned through with inertia.

60%, yes...

Must be like when you're skiing, all the runs look vertical....

Quote:

Originally Posted by reffug

When your used to wheeling in your yard its understandable how you could think this........

And I don't wheel in my yard......only in my ditch. LOL! That impressed the wife when she unexpectedly drove up.

billmiranda · 05-16-08, 05:45 PM

Hmm,.. isn't a 45 degree slope = 100% grade?

Land Rover used to make a big deal out of being the only 4x4 capable of actually going up and down a grade like this in a controlled fashion.... not just a short one either which you can build up momentum and do with a lot of vehicles.

I know with my mud tires on,.. creeping over a 100% graded area like that... the brakes hardly hold and I start sliding as everything not bolted or strapped down in the truck tries to kill me.

Tools R Us · 05-16-08, 05:54 PM

Quote:

Originally Posted by Tackelbarry

And I don't wheel in my yard......

Being a newbie and all,,, I will save you the search on who/what that reference is about!

http://forum.ih8mud.com/80-series-te...k-my-yard.html

LandCruiserPhil · 05-16-08, 06:07 PM

Quote:

Originally Posted by Tools R Us

Being a newbie and all,,, I will save you the search on who/what that reference is about!

http://forum.ih8mud.com/80-series-te...k-my-yard.html

LOL ...some threads will never die

e9999 · 05-16-08, 10:18 PM

those were the good ole days...

e9999 · 05-16-08, 10:20 PM

Quote:

Originally Posted by '74 UA FJ

60º is steep. I dont' think a stock 80 could climb a 60º grass hill from a stop at the base.

'nuff said.... I think you draw a line down from the CoG and it'd be damn close to the rear contact patch...

cruiser-poor · 05-17-08, 07:25 AM

Quote:

Originally Posted by e9999

'nuff said.... I think you draw a line down from the CoG and it'd be damn close to the rear contact patch...

You're right - in fact, for a 60 degree grade, I think it would be well behind it - in which case, you're going over. This is just simple mechanics and there's no getting around it, even neglecting issues of available torque, traction, approach/departure angles, etc.

Even the UNIMOG, which is famous for its climbing and side-slope abilities due to a low CoG, is rated to climb a max 70% grade (35 degrees).

Again, this was not the point of the thread and I don't mean to be knocking on anybody. I just find it interesting.

Tackelbarry · 05-17-08, 05:02 PM

Quick update; I drove back out to the farm today and made the same climb on the back of the dam. This time I put it into 4 low and engaged the CDL. I got half way up and stopped and remained stationary for about 2 minutes. I wanted to see if the power steering fluid would drain or fall to the bottom/back of the reservoir. I finished the climb and heard no whining from the power steering pump. When I flushed/changed the fluid I added about 6 ounces of the Lucas power steering additive. Everything was smooth and quiet. Thanks again, for all of the information and good advice. Even though I rarely post, I really do enjoy this forum. Scott

05-16-08, 05:45 PM	#32
billmiranda IH8MUD Junior Join Date: Jul 2003 Location: Northern VA TLCA# 7390 Posts: 104	Hmm,.. isn't a 45 degree slope = 100% grade? Land Rover used to make a big deal out of being the only 4x4 capable of actually going up and down a grade like this in a controlled fashion.... not just a short one either which you can build up momentum and do with a lot of vehicles. I know with my mud tires on,.. creeping over a 100% graded area like that... the brakes hardly hold and I start sliding as everything not bolted or strapped down in the truck tries to kill me. __________________ 91 80 Series: LT1, 6 inch Lift, SSRs, Custom Sliders, ARB Front Bumper. 97 80 series: 3" OME, Custom Bumpers&Sliders. Hand-throttle, 10k Winch, Scion radio, 35s, Slee xfer/Locker actuator armor. 90 4Runner SR5-V6: 2 inch OME Lift, 4.88s, Lockers, TSLs, Sliders, TJM Front, AllPro Rear, diff Armor.

05-16-08, 10:18 PM	#35
e9999 You want to do what...? Join Date: Sep 2003 Location: PRK Posts: 10,338	those were the good ole days... __________________ '97: 88K, 3xlock, Custom HD roo bar for sale, 285 MT/Rs on steelies, Hanna sliders, 851+1.5"/863/N73/N74E/SD24, ARB bull with M12, Kaymar with duals, Kaymar rack, Slee TC skid, 2m/440, more stuff, loose nut behind the wheel!) '03: 99K, the better half's... DD Accord souped up DR650

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05-17-08, 05:02 PM	#38
Tackelbarry IH8MUD Rookie Join Date: Apr 2007 Location: N.C. Posts: 53	Quick update; I drove back out to the farm today and made the same climb on the back of the dam. This time I put it into 4 low and engaged the CDL. I got half way up and stopped and remained stationary for about 2 minutes. I wanted to see if the power steering fluid would drain or fall to the bottom/back of the reservoir. I finished the climb and heard no whining from the power steering pump. When I flushed/changed the fluid I added about 6 ounces of the Lucas power steering additive. Everything was smooth and quiet. Thanks again, for all of the information and good advice. Even though I rarely post, I really do enjoy this forum. Scott