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Thread: Sand-bashing on 1st Test Drive of J40s !

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    Default Sand-bashing on 1st Test Drive of J40s !

    Dear friends & fellows, as the rebuilding of our vehicles is nearing completion, @machine & I decided to give them a run slightly off the road to see how they perform in the real world and to fix the snags, if any...

    ==========================
    Primarily, we wanted to test @machine's BJ40 that went thru a total make-over including heart transplant to an original 3B diesel with a H55F (5 spd) gearbox.

    On the ground, the vehicle's mechanicals performed flawlessly throughout the trip though it was put thru paces by @machine to check its traction on different surfaces, gearing, access angles and road speed. The only downside was the type of tires that were on the vehicle with a high pressure making them inappropriate to gain traction or even float.

    They can be excellent sand tires with low pressure as the footprint is bigger being on 17" wheels and wider already. Shortcomings will be on steep & bumpy climbs where traction weighs more than momentum.

    Overall, this vehicle stood upto the satisfactory mark as just being on its first drive out of the workshop.

    ==========================
    The grey FJ40 was with our friend Mr. Kamran who is maintaining this vehicle as his daily-drive & for occasional hunting. This vehicle boasts a 2F motor with all the necessary upgrades like, PS, locking hubs, A/C, heater, sound system and related stuff. This vehicle has a long history of multiple restorations and finally a very reliable & capable machine.

    The vehicle is already due to receive a bit of lift by re-arching the leaf-springs & a set of M/Ts.

    ==========================

    I also wanted to test the modifications done on the suspension so it was a good opportunity trigger by brother @machine.

    On the soft dry sand, the MTs were pleasing enough even @ 14psi (seemed as if 30 psi on standard tires). Could simply drive without 4x4 & momentum.

    On rocks (the egg shaped football sized), I had a bad experience.... Though it was not in my plans originally but temptation is a big curse.

    A while back, I removed the traction bar from the rear and panhard bars from both ends to work out the articulation for shock mounts. The plan was to put an improved design of traction bar later and leave panhards aside for the moment. And my fellows know very well, traction bar is a MUST with SOA. And on this day, I totally forgot that traction bar is missing...

    So, while checking the approach angle and lowest crawl speed on the barrage slop of about 45 degrees of round rocks, I got TEMPTED. A few bounced of the rear tires due to axle wrap and loss of traction, the vehicle couldn't go further than its own length from the base. Secondly, one cross-joint on the rear shaft got damaged (couldn't break it though).

    Overall a very happy day. Thanx to my buddies.

    tareen


    Sand-bashing on 1st Test Drive of J40s ! - wt5Ii

    The Birthday Boy....1st Jan - 1st Drive - 1st Anniversary of project machine's BJ40 (https://www.pakwheels.com/forums/4x4...oyota-o-o-fj40)
    Sand-bashing on 1st Test Drive of J40s ! - PLJ17

    The guest of honor, Mr. Kamran FJ40 with 2F motor
    Sand-bashing on 1st Test Drive of J40s ! - 3zcwP

    The Crew....Banda-e-Na Cheez with a keen off-roading enthusiast https://www.pakwheels.com/forums/4x4...uiser-build-up
    Sand-bashing on 1st Test Drive of J40s ! - SUewc

    Above three pictures - Courtesy PakWheels Forums - View Profile: reezvaan


  2. #21
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    Quote Originally Posted by tareen View Post
    The beast must crawl with trailer on this location after your recent upgrades in suspension.

    Love that new traction bar.
    <<<The Obstacle Is The Path>>>
    1984 BJ41, 1967 FJ40, 1984 BJ61 , 1983 Mutt M825, 1982 CJ5, 1942 Willys

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    Quote Originally Posted by tareen View Post
    Thank you for this post bro.

    Other than that fluffy soft sand on the top edge, it seems that the beast has become over weight also?

    what do you say?
    <<<The Obstacle Is The Path>>>
    1984 BJ41, 1967 FJ40, 1984 BJ61 , 1983 Mutt M825, 1982 CJ5, 1942 Willys

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    Quote Originally Posted by machine View Post
    The beast must crawl with trailer on this location after your recent upgrades in suspension.
    With the existing stock gear ratio, it simply will not! We really need suitable crawl ratios (rings/pinions to be specific) if we keep going to this very place often

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    Quote Originally Posted by machine View Post
    Other than that fluffy soft sand on the top edge, it seems that the beast has become over weight also?

    what do you say?
    IMHO, as terrain is out of our jurisdiction to fix and YES it was the culprit for almost no traction near the top edge, tires are to be blamed MORE than any other factor... mere 5mm wide & deep grooves, lots of slick surfaces and tarmac friendly tire pressure was apparently the cause of little traction. Enough torque & power were available all the time.

    Though weight has increased considerably, it sometimes helps to gain traction as well in slow maneuvers. But mostly, its always good to have a lighter vehicle to have a quick momentum & less weight to drag on uphill climbs.

  6. #25
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    Quote Originally Posted by tareen View Post
    IMHO, as terrain is out of our jurisdiction to fix and YES it was the culprit for almost no traction near the top edge, tires are to be blamed MORE than any other factor... mere 5mm wide & deep grooves, lots of slick surfaces and tarmac friendly tire pressure was apparently the cause of little traction. Enough torque & power were available all the time.

    Though weight has increased considerably, it sometimes helps to gain traction as well in slow maneuvers. But mostly, its always good to have a lighter vehicle to have a quick momentum & less weight to drag on uphill climbs.

    Allright - Lets give it another chance tomorrow
    <<<The Obstacle Is The Path>>>
    1984 BJ41, 1967 FJ40, 1984 BJ61 , 1983 Mutt M825, 1982 CJ5, 1942 Willys

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