Report on P/T Kit and Low Range Gears

Discussion in 'AZ- Copper State Cruisers' started by ttubb, Jul 19, 2012.

  1. ttubb

    ttubb

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    Report on Installation of Marks Part Time Kit and Marlin’s Low Range Gear Set on 1995 FZJ-80

    I have a 1995 FZJ-80 with 167000 miles. Tires are 35 inch with stock gearing at 4:10. Speedometer is uncorrected and reads approx 10% slow due to larger tires. Both diffs have ARB Air Lockers installed. Center Diff Lock Switch had been previously installed (required for P/T Kit installation).

    Installation was completed in one day by Slee Off Road in Golden, Co. Since the transfer case was out, we elected to install all new seals and bearings, completing the overhaul.
    Prior to installation, I engaged low range and locked the trans in low to determine the speed at 3000 rpm. Speedo indicated 10mph at 3000 rpm. The following are the readings after Low Range install:
    1st - 3000 rpm – 7mph
    2nd – 3000 rpm – 14mph
    3rd – 3000 rpm – 21mph
    4th – 3000 rpm – 28mph

    My 4:10 gears indicate 56mph at 2000 rpm on highway driving (GPS indicates 62.2mph)

    Impressions –
    Part Time Kit – The truck steers easier in 2wd and seems to accelerate more quickly. I suspect the milage will improve somewhat, but that mainly depends on my driving habits.
    Low Range Gears – Much improved crawl capability with 4:10 gears.

    I had been thinking of going to 4:88 gears, however I like the ability to go 75 mph at approx 2500 rpm with the 4:10s. For hills I can just drop down a gear and it is about what 4:88s gearing would be. My real reason to regear was for better low range (crawl) performance and this new gearset addressed the problem at much less cost. Just my preference.

    I hope this helps any one thinking of doing either of these mods. Obviously, doing both while the transfer is apart is the way to go.

    One more note, I cannot say enough about Christo Slee’s operation. Ben, Amory and the best tech, Joe are top notch. Good fair prices and excellent service, done right the first time!
    __________________
    KA7TLT - TLCA 13015
    "78" FJ-40 - "Marmot" F&R ARB Lockers, OME Suspension, MAF Shackle Rev Kit, 4+ Flip Kit, Rear Disc Brakes, Warn Winch, Safari Snorkel, 4+ Rear bumper/Tire Carrier
    "95" FZJ-80 - "White Top" F&R ARB Lockers, Slee F&R Bumper & Sliders, Warn Winch, 35s, Safari Snorkel
    "09" FJ Cruiser - All Pro Offroad Skidplates and Front Bumper, OEM Sliders - "Daily Driver"
     
    KingsMtn likes this.
  2. LandCruiserPhil

    LandCruiserPhil Peter Pan Syndrome Supporting Vendor

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    Thanks for the feedback

    Marlins low range gear set is currently on sale (20% off) for $800.00 + $15 shipping to AZ
     
    Last edited: Jul 19, 2012
  3. ttubb

    ttubb

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    Yes, and Christo matched that price the same day.

    BTW, recall the conversation we had about AVM hubs having failures? Turns out the early models (standard duty) are cast metal whereas they now make a "heavy duty" model that is forged metal for additional strength. Slee only carries the heavy duty model, which I had installed.
     
  4. murf

    murf Lifer SILVER Star

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    Good info and alternative
     
  5. LandCruiserPhil

    LandCruiserPhil Peter Pan Syndrome Supporting Vendor

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    Correct I was in contact with Marks yesterday. Also more news for the part time kits - Marks 4wd said they will soon offer a part time kit that keeps the ABS. Currently testing brackets and said it should be out within the next month.
     
  6. ttubb

    ttubb

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    Well that is good news. Any word of a retrofit?
    Guess I will have to find another use for my piece of black electrical tape :D
     
  7. Tools R Us

    Tools R Us

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    Nice! For sure, would need 4th gear in low range.
     
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