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11-02-09, 08:35 AM
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#1 (permalink)
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250+ Club
Join Date: Jul 2007
Posts: 255
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Marks Transfer Gears
So I've got my Aussie lockers in and tested over two days of wheeling. Wow! What a difference. You can check out our trip videos buy searching audaciousduo on you tube there are quite a few. The next mod I'm after is a lower crawl ratio and I think I'm leaning toward the Marks transfer case gears. Even with my 370:1's I can use the 305:1 gear set and end up with a 55:1 crawl ratio. For the wheeling that I do this is sufficient. Now the big question for the 70 guru's out there. I have a 1985 BJ70 Canadian spec cruiser with a 3B and a 5 Spd. Do I have a 34 mm or 38 mm Idler shaft?
Thanks in advance
Dave
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 “Be Who You Are and Say What You Feel Because Those Who Mind Don't Matter and Those Who Matter Don't Mind.”
-- Dr. Seuss
FZJ80, Locked.
BJ70, Belton lift, ARB bumper, 8274 Warn, home built roof rack, lunch box lockers with more mod's to come
Last edited by audaciousduo; 11-02-09 at 08:41 AM.
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11-02-09, 10:19 AM
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#2 (permalink)
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Forum Lifer
Join Date: Sep 2002
Location: Vancouver Island BC Canada
Posts: 4,653
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You should just crawl under your truck and measure it. The changeover date is the 10th month of 1985.
I have these gears in stock...
~John
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Come and visit us in Duncan, Vancouver Island, BC
www.raddcruisers.ca
Monday - Friday 08:00 - 17:00
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11-02-09, 11:07 AM
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#3 (permalink)
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Forum Lifer
Join Date: Sep 2002
Location: Vancouver Island BC Canada
Posts: 4,653
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Which trail are you doing in the picture? It looks quite familiar...
~John
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Come and visit us in Duncan, Vancouver Island, BC
www.raddcruisers.ca
Monday - Friday 08:00 - 17:00
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11-02-09, 11:31 AM
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#4 (permalink)
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250+ Club
Join Date: Jul 2007
Posts: 255
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Quote:
Originally Posted by Radd Cruisers
Which trail are you doing in the picture? It looks quite familiar...
~John
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Sunrise lake. The V-Rock section. I'll see if I can figure out hat I'm measuring down there. I've never rebuilt a land cruiser T-Case but I've done a few Rover ones so I should be able to pull it off.
Thanks
__________________
“Be Who You Are and Say What You Feel Because Those Who Mind Don't Matter and Those Who Matter Don't Mind.”
-- Dr. Seuss
FZJ80, Locked.
BJ70, Belton lift, ARB bumper, 8274 Warn, home built roof rack, lunch box lockers with more mod's to come
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11-02-09, 12:15 PM
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#5 (permalink)
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bj74_guy?
Join Date: Oct 2003
Posts: 918
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Quote:
Originally Posted by Radd Cruisers
I have these gears in stock...
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Can you PM me a price please?
__________________
norm
Coastal Cruisers
'85 BJ70, '89 BJ74, '92 M101cdn
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11-02-09, 12:51 PM
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#6 (permalink)
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Forum Lifer
Join Date: Sep 2002
Location: Vancouver Island BC Canada
Posts: 4,653
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Quote:
Originally Posted by bj70_guy
Can you PM me a price please?
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I don't do PMs on 'Mud because it creates too much email traffic for me.
Please email me via my website or call my business number 250 597 2500.
~John
__________________
Come and visit us in Duncan, Vancouver Island, BC
www.raddcruisers.ca
Monday - Friday 08:00 - 17:00
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11-02-09, 12:56 PM
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#7 (permalink)
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bj74_guy?
Join Date: Oct 2003
Posts: 918
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Understood and done.
__________________
norm
Coastal Cruisers
'85 BJ70, '89 BJ74, '92 M101cdn
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11-16-09, 11:09 AM
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#8 (permalink)
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Site Addict
Join Date: Mar 2007
Location: vancouver B.C. Canada
Posts: 1,258
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The question is are you going to go 1to1 high or 108 to1? If your axles are 3:70 it might be a good idea to go this way especially with bigger rubber on it.
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2.5 OME Heavy coils, ARB rear locker PRADO STOLEN 
 89 BJ74 ARB lockers front and rear 4" ZEAL lift, 24v M8000 winch ARB bull bar, Marks 108 to 1 HI 305 to 1 low 33" Yokohama MTpluses 60" HI-LIFT
with MAGELLAN 1500 TRITON with JUNGLE GHOST maps. OH YA I'M ALSO A JUNIOR MEMBER OF COASTAL CRUISERS!
Last edited by prado t; 11-16-09 at 11:16 AM.
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11-16-09, 06:34 PM
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#9 (permalink)
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Forum Lifer
Join Date: Sep 2002
Location: Vancouver Island BC Canada
Posts: 4,653
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I installed the Mark's gear set into Coleman (will follow up in my build thread soon) just over week ago and it makes a world of difference in the low range. I went with 1.00:1/3.05:1 ratios.
I did a snow run on Remembrance Day to go up to an aircraft wreck where an air crew lost their lives in 1941 and the gears really helped make forward progress in the snow a lot better (where slow speeds can make all the difference).
The gear whine is noticeable, but not that bad in high range. In low range it's more pronounced. With better sound insulation, the whine would not be bad at all. I have yet to use the recommended gear lube and that is supposed to reduce gear noise quite a bit.
~John
__________________
Come and visit us in Duncan, Vancouver Island, BC
www.raddcruisers.ca
Monday - Friday 08:00 - 17:00
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11-16-09, 08:26 PM
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#10 (permalink)
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250+ Club
Join Date: May 2006
Location: Victoria, BC
Posts: 487
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Quote:
Originally Posted by audaciousduo
Sunrise lake. The V-Rock section. I'll see if I can figure out hat I'm measuring down there. I've never rebuilt a land cruiser T-Case but I've done a few Rover ones so I should be able to pull it off.
Thanks
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The idler shaft protrudes through the rear t-case cover and a segment is cut out for the lock tab. Easy to see (rusty end since its exposed). Measures O.D. should be 38 mm, or if you have the earlier one its 32mm. Here is a picture of mine with the back off.
If you have 3.70 diffs, I think you want to go Marks 3.05/1.08, like Aaron suggests. The 8% under drive will help compensate for larger tires and your relatively high geared diffs.
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TLCA 17759 - 89BJ74, OME springs, 33X12.5 Truxus, air lockers, 24-12V trailer light converter, CB, ARB fridge, McNamara transfer gear, GPS/snorkel/sliders/pyro/ boost/water temp /custom rear bumper-sliders-swing out fuel carrier, dents and bush rash.
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11-17-09, 12:28 PM
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#11 (permalink)
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Site Addict
Join Date: Mar 2007
Location: vancouver B.C. Canada
Posts: 1,258
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With over 50,000kms since the Marks Transfer Case installation (gears were already set-up in split case) it is definately quieter, either that or I am more deaf lol. The lower range makes all the difference.
As we speak I am deciding to go Toy Box / with the Marks case ( because of the added strength of the Marks gears) The LOWER RANGE makes all the difference when it comes to quality wheeling.
__________________
2.5 OME Heavy coils, ARB rear locker PRADO STOLEN
89 BJ74 ARB lockers front and rear 4" ZEAL lift, 24v M8000 winch ARB bull bar, Marks 108 to 1 HI 305 to 1 low 33" Yokohama MTpluses 60" HI-LIFT
with MAGELLAN 1500 TRITON with JUNGLE GHOST maps. OH YA I'M ALSO A JUNIOR MEMBER OF COASTAL CRUISERS!
Last edited by prado t; 11-17-09 at 12:37 PM.
Reason: shity spelling
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11-17-09, 12:33 PM
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#12 (permalink)
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Site Addict
Join Date: Jan 2005
Location: Fort St John, BC
Posts: 1,649
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Nothing good to add here, but if done, please post up thread on install, I have been sitting on my marks gears for 4 years to install in future project.
Cheers,
Deny
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11-17-09, 02:56 PM
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#13 (permalink)
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Forum Lifer
Join Date: Sep 2002
Location: Vancouver Island BC Canada
Posts: 4,653
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Quote:
Originally Posted by Deny
Nothing good to add here, but if done, please post up thread on install, I have been sitting on my marks gears for 4 years to install in future project.
Cheers,
Deny
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Will post up soon, it's just that each time I try to get to it, something else comes up...
~john
__________________
Come and visit us in Duncan, Vancouver Island, BC
www.raddcruisers.ca
Monday - Friday 08:00 - 17:00
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