4 wheel drive high

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Thread: 4 wheel drive high

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    Default 4 wheel drive high

    how fast can one travel in 4WD H (assuming engaging it at a proper speed)? during winter or wet highway driving can 4WD H be used at speeds of 55-70MPH? i have a 2001 4WD Tundra (shift on floor).

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    Default Re: 4 wheel drive high

    as fast as you feel safe driving it. everything is turning at teh same speed, so yer all good.
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    Default Re: 4 wheel drive high

    As far as I know, and from looking in my owners manual, you can go 75 mph while in 4hi. and I think 35 in 4low. But you shouldn't be going that fast anyway if you need 4 wheel drive.
    David~2001 Toyota Tundra 4X4 TRD SR5~SSautochrome headers~Single 2.5" exhaust w/ Flowmaster 50 series delta flow muffler~K&N FIPK intake system w/True-flow filter~ASP underdrive pulley~Custom tuned Unichip (thank you Johan)~Powertrax No-slip~Bilstein 5100 front and rear w/ Deaver 10 pack~Diff breather mod~255/85 BFG M/T on Wheelers Black Steelies Type B~Custom Rocksliders~Skid Row front skid plate~Custom Transfer case skid plate

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    Default Re: 4 wheel drive high

    Quote Originally Posted by Hugemoose
    As far as I know, and from looking in my owners manual, you can go 75 mph while in 4hi. and I think 35 in 4low. But you shouldn't be going that fast anyway if you need 4 wheel drive.
    i guess you've never driven in the deserts, beaches, or sand dunes then. You can go as fast as you feel comfortable, and as fast as the truck permits you to go.
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    Default Re: 4 wheel drive high

    Quote Originally Posted by bjamin
    how fast can one travel in 4WD H (assuming engaging it at a proper speed)? during winter or wet highway driving can 4WD H be used at speeds of 55-70MPH? i have a 2001 4WD Tundra (shift on floor).
    You have the 4x4 shifter on the floor?

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    Default Re: 4 wheel drive high

    I have yet to see a 01 Tundra with shift on the floor??? This would be cool.

    Dan

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    Default Re: 4 wheel drive high

    Quote Originally Posted by J-man
    i guess you've never driven in the deserts, beaches, or sand dunes then. You can go as fast as you feel comfortable, and as fast as the truck permits you to go.
    No I never have. I always drive in the snow, so 75 on snow covered roads wouldn't be good. And you're right, you should only go as fast as your truck permits you to go.

    But a shifter on the floor?! That is new to me; never seen one of those on a Tundra except for a highly modified SA Tundra with 2 trasfer case shifters coming out of the floor.
    David~2001 Toyota Tundra 4X4 TRD SR5~SSautochrome headers~Single 2.5" exhaust w/ Flowmaster 50 series delta flow muffler~K&N FIPK intake system w/True-flow filter~ASP underdrive pulley~Custom tuned Unichip (thank you Johan)~Powertrax No-slip~Bilstein 5100 front and rear w/ Deaver 10 pack~Diff breather mod~255/85 BFG M/T on Wheelers Black Steelies Type B~Custom Rocksliders~Skid Row front skid plate~Custom Transfer case skid plate

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    Default Re: 4 wheel drive high

    ninety-ish. not many places you can do that sort of thing tho, nor many conditions you can do it in.

    a.d.d. wont dis/engage above a certain speed, i think it might be 55 to engage, 75 to disengage.

    handy for light snow days on hardpack, provided youre prepared equipment-wise, have requisite sight distance, weight in the bed, going in a straight line for a few hundred miles, etc.

    -sean

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    Default Re: 4 wheel drive high

    I did tens of thousands of miles in 4hi on wet roads at 65-75ish. Many many miles at 20-30 on uncleared interstate after a snow storm.

    I rarely went over 85 in 4HI. I know it would not engage at over 62mph, I never had a problem with it disengaging at any speed - but I probably never tried it over 80ish.
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    Default Re: 4 wheel drive high

    I have done 65-70mph on the highway in snow conditions using 4Hi several times. Please don't argue with me over "safety"...

    You must engage 4Hi at speeds below 55-60mph, but after it's engaged, go as fast as you like. You'll feel the added friction, so it will take more gas to go faster, than if you were in 2Hi.
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    Default Re: 4 wheel drive high

    i would think that going over 65 in 4hi would start to break things..i could be wrong tho ive never gone over 45 in 4hi cause i was afriad i was gonna break the transfer case or something
    adam

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    Default Re: 4 wheel drive high

    55 to engage, whatever speed you want once you're engaged. I've gone up to 80 on a straight away dirt road but, only for a short distance.

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    Default Re: 4 wheel drive high

    i went to the race track a couple of months ago and someone told me i should use 4hi for a better launch, i thought he was crazy and that i would blow out my transfer case, so if you can go 80+ then racing in 4hi isnt that far fetched???
    adam

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    Default Re: 4 wheel drive high

    Quote Originally Posted by adam2296
    i went to the race track a couple of months ago and someone told me i should use 4hi for a better launch, i thought he was crazy and that i would blow out my transfer case, so if you can go 80+ then racing in 4hi isnt that far fetched???
    adam
    launching is bad for the t-case. But a dramatic change in speed (high-torque) is different than simply going at a fast speed.
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    Default Re: 4 wheel drive high

    LOL

    I have done about 5 runs in my stock tundra at the track.. going up to 83 MPH each time ... in 4

    I often cruise in 4HI at around 90 for 10s of miles at a time, haven't had any issues yet.
    My Truck: 2000 Black TRD AC SR5

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