I have the AA 4:1 gears. As noted above though, the hi range is actually a 10% underdrive. I have an H55, and 4.10 gears in the diffs, running 35's. I love this combo. I rarely use 1st, it's low enough I can get out and walk very slowly alongside. 3rd low range is usually what I start off in and it's pretty versatile.
3:1/4:1 gears in a split case (1 Viewer)
- Thread starter HemiAlex
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I bought a stock DS motor mount, cut off the bolts, drilled it, then thru-bolted it in place. It's bomber.
orangefj45
Supporting Vendor
Thanks for the ongoing support, patronage and referrals guys!!!!
Georg @ Valley Hybrids
Georg @ Valley Hybrids
- Thread starter
- #24
Hows the noise? Would you run them in a daily driven truck?
@orangefj45 do you have any other customers running the H55F and 3.70's with the 3:1 or 4:1 gears?
Has anyone here clearanced their own tcase to fit the gears? The FZJ80 guys simply clearance their cases with an angle grinder as the interference is rather small. (i've helped do two of their cases). There are tons of write ups on it with great directions. The 60 series gear manufacturers don't really help us do it ourselves. Now I'm sure I could figure it out but I am trying to grasp whether it is a clearance cut that bobby joe in his garage can do or if it's more complex and requires a precision mill / fixturing.
I noticed gear whine when they were first installed. I now have ~10K miles on them and maybe I've gotten used to it, but I think it's much better now. And, the noise is only noticable on the freeway. Around town I never noticed it. The gears are otherwise invisible, so DD is fine.
orangefj45
Supporting Vendor
Just like any other aftermarket Tcase gear set, you can and will experience some gear noise/whine when that particular gear set is "powered" ( in use ). Since the 4:1 gear sets for the split case are always turning, you can expect some mild gear noise.
A number of people have attempted ( with some good and some poor results ) to clearance the cases themselves. Unlike the HF2A cases that only need to be ground in one single non-critical area, the split cases need to be clearanced for two gears in a total of 8 locations and the case ends up with 3 fairly thin spots ( that won't weaken the case ). I would advise to have them machined by somebody who's familiar with the subject matter, instead of attacking with an angle grinder ……
We can certainly do the machine work for you as well as supply the gear sets and rebuild kits.
Georg @ Valley Hybrids & Cruiser Brothers
A number of people have attempted ( with some good and some poor results ) to clearance the cases themselves. Unlike the HF2A cases that only need to be ground in one single non-critical area, the split cases need to be clearanced for two gears in a total of 8 locations and the case ends up with 3 fairly thin spots ( that won't weaken the case ). I would advise to have them machined by somebody who's familiar with the subject matter, instead of attacking with an angle grinder ……
We can certainly do the machine work for you as well as supply the gear sets and rebuild kits.
Georg @ Valley Hybrids & Cruiser Brothers
I’ve got the 3:1 gears in my split case. Clearanced the case myself which wasn’t hard as it was only one spot if I am remembering correctly. Only issue I have had besides whine and the twin sticks making racket above 70mph, is the oil slinger that attaches to one of the gears got sheared off somehow. Didn’t notice it until I tore down for transmission replacement.
My combo in the 80 is Cummins 6BT/NV4500/Splitcase. I don’t wheel it very hard compared to others.
My combo in the 80 is Cummins 6BT/NV4500/Splitcase. I don’t wheel it very hard compared to others.
Georg,
Thank you for the specific details regarding the tcase clearancing. I hate paying for things I can do myself. The case machining sounds a bit more than I care to chew off. Once I find that big bag of money I'll give you a call.
Thank you for the specific details regarding the tcase clearancing. I hate paying for things I can do myself. The case machining sounds a bit more than I care to chew off. Once I find that big bag of money I'll give you a call.
Thanks for the mention!
We (Cruiser Outfitters) stock the 3:1 3.3:1 and 4:1 gear sets for the Split-Case in both 34mm and 38mm variety.
You can read more about them here on Mud:
YWST: Low Range T-Case Gear Sets for the 1980-2007 Cruisers
Yeah, we stock that! Land Cruiser Transfer Case Low Range Gear Sets Sumo Gear sets are made to OE specifications in Japan. These popular gear sets offer transfer case gear reduction with the highest quality components on the market. Give us a call if you have any questions or would like to...
forum.ih8mud.com
We can also prebuilt BRAND NEW split cases with the low range gears and 5 speeds
You can read more about those here on Mud too:
YWST: Complete Split T-Cases - NEW
Yeah, We Stock That. Often customers just want a brand new OE T-Case and all the new parts to install it behind their existing transmission or one of our OE 5 speed H55F transmission options. Transmissions, transfer cases, flanges, gears, bearings, deals and more. We've got it ready to go. We...
forum.ih8mud.com
Buzz us @ CruiserOutfitters if we can help with your gearing needs!
hoser
SILVER Star
I have a bunch of numbers... if anybody likes numbers...
(let me know if you see any errors)
(let me know if you see any errors)
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orangefj45
Supporting Vendor
That is great.
Any chance you want to add the 3.1:1 & OE 2.2956 ratio too?
Actual tooth counts are shown here:
I want to do one that relates high range/low range axle gearing and tire size for the effective gear ratio as we've done for the 80 Series.
YWST: Low Range T-Case Gear Sets for the 1980-2007 Cruisers
Are those UD gears still in the "coming soon" stage of things or are they available? Thank you @cruiseroutfit ! Due in the next week or two :D These have been fitted to the 8x Tcase, I have not personally installed the 100 case yet.
forum.ih8mud.com
hoser
SILVER Star
Updated and brought calculations out to the thousandths decimal place using Kurt's figures. (results in tenths.
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