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 (2 Viewers)
- 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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Looking for a tad more info on the ease of self grinding the split case to fit 3:1 gears. The guys at cruiser outfitters sent me a pic of what they clear out, but they do all the cases the same to fit the 4:1 gears as its easier to do them all the same. the 3:1 apparently does not need a ton of clearance. so hoping to do this myself as I dont have the 700usd to get them to. I just ordered a new tcase assembly from them plus the 3:1 gears and want to know how much work I have ahead of me and If I need anything special to do the Clarence. i hate to be a cheap ass, but I did not expect to smash a hole in my case 8 hrs from home
and def cant be spending any more then the extra on the low range gears to add some kind of light into this dark situation lol.
I hear your concern. I wouldn't worry about the clearence issue. People been running those gears for many years now, and I never hear any bad news about holes in T cases. My friend has those gears in two of his current 3 LC's and he has ran them on many more.
orangefj45
Supporting Vendor
Looking for a tad more info on the ease of self grinding the split case to fit 3:1 gears. The guys at cruiser outfitters sent me a pic of what they clear out, but they do all the cases the same to fit the 4:1 gears as its easier to do them all the same. the 3:1 apparently does not need a ton of clearance. so hoping to do this myself as I dont have the 700usd to get them to. I just ordered a new tcase assembly from them plus the 3:1 gears and want to know how much work I have ahead of me and If I need anything special to do the Clarence. i hate to be a cheap ass, but I did not expect to smash a hole in my case 8 hrs from home
FWIW, we sell all these components and we charge $195 to clearance the cases ( on a CNC mill ).
We clearance the cases the same for 3:1 or 4:1 gears.
We also ran the original set of 4:1 prototype gears in my personal vehicle more than ten years ago and have sold and installed lots of them since.
Happy to help!
Georg @ Valley Hybrids @ Cruiser Brothers
Shop 209-475-8808
Sales@valleyhybrids.com
well dang, id have gone through you as 260cad beats 1000cad for the milling. I needed a whole new tcase though and it doesnt look like you sell it on your site. had to get the truck back up and running as fast as possible.
orangefj45
Supporting Vendor
We have multiple
Georg @ Valley Hybrids @ Cruiser Brothers
new cases in stock as well, constantly working on updating our site.
Georg @ Valley Hybrids @ Cruiser Brothers
damn, I honestly didnt have time to call everyone (also long distance), had to go by what was posted
