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I overlooked this part. You’re in AR, right? Ozark Overland Outfitters in West Plains, MO is just across the border and they’re a Cruiser specialty shop that may be able to do it for you.I don't have a good garage to take on this project at home. I will be farming it out. I'm looking for options in the area.
Trail Gear isn't exactly known for quality but I have zero experience with their gear sets. Hope this helps!Anyone on here have some insight on the price difference here:
~$500
Trail Gear Land Cruiser Transfer Case 3.1:1 Low Range Gear Set - Fits 8x/100 Series
Low Range Gear Reduction Sets for Toyota Land Cruiser Applicationscruiserteq.com
Vs. your link for the Sumo Gear at $725? Figured I'd ask here before calling...
rjones
TrailGear is made in China. Sumo is made in Japan. Definite and well-known quality difference.Anyone on here have some insight on the price difference here:
~$500
Trail Gear Land Cruiser Transfer Case 3.1:1 Low Range Gear Set - Fits 8x/100 Series
Low Range Gear Reduction Sets for Toyota Land Cruiser Applicationscruiserteq.com
Vs. your link for the Sumo Gear at $725? Figured I'd ask here before calling...
rjones
I installed the trail gear set at 180k miles. Have 293k on the rig now with a lot of 4 low miles. Definitely a noticeable increase in gear noise in 4 low but only when in higher gears and higher RPM. The control is absolute worth it! No changes at all in 4 high and daily driving.Anyone on here have some insight on the price difference here:
~$500
Trail Gear Land Cruiser Transfer Case 3.1:1 Low Range Gear Set - Fits 8x/100 Series
Low Range Gear Reduction Sets for Toyota Land Cruiser Applicationscruiserteq.com
Vs. your link for the Sumo Gear at $725? Figured I'd ask here before calling...
rjones
Late to the discussion but if low speed engine braking is what you want, another possible way to do it would be a manual torque converter lock-up and valve body modification to get it to work in 1st and 2nd gear. Probably about the same cost as 3:1 gear swap though.There are several threads on this especially for 80 series. I would like to lower the 4L ratio by 25% to slower crawl speed. This will keep me from riding the brake when descending mountain trails in Colorado or somewhere out west. I don't want to change the final drive ratio. I like the way it drives on the highway with 33" tires and my lightweight SRS wheels. I like quick braking, handling, acceleration and the agile feel on paved 180 degree switchbacks.
No input shaft needed for just low range gear set. Your literally just changing out the gears. Clearencing of the inside of the case with a grinding wheel is required but pretty easy.With 3:11 LRR you’ll need the 80series input shaft- that’s some extra cost and labor- did you order that as well? Cruiser tech was supposed to update the web page to make sure you ordered that kit for a 100 series.
I did the math on low gear reduction and input shaft and for the money re gearing diffs to 4.88 came out on top. 3.11 low range reduction gearing and adding the 10% high range gets you a comparable to 3.56 re gear. 10% high range under drive gets you better drive ability with 33’s & 34’s. consider doing both tc while you got it all apart.
Thank you to all that contributed to answering my questions. I want to provide an ending to the thread.
1) 4H is a bit quieter than before the modification. Jason Harris found the original rear output shaft bearing was worn. This may have been contributing to the seal leak. Before the new gears and bearing, I could feel some transfer case vibrations being transmitted via the shifter. The slight vibration is now gone.
2) I can now crawl and descend rocky ledges at a walking speed. 4L in 1st has a top speed of 10 to 12 MPH before I start revving higher than I want.
3) 4L is now just another lower gear ratio. I control CDL through the CDL button via the 7-pin modification.
4) I can use 2nd start in 4L if I need to start with higher gearing.
5) I have not noticed any abnormal noise in 4L. It sounds like it did before the mod. It may be less noise now because of the new rear output shaft bearing.
6) I can now cut short on switchbacks in 4L without worrying about CDL binding. This may let me turn some 2 point switchbacks into 1 point.
7) No leaks with the new seals.
At this point, I have no plans to regear the front or rear diffs. If I'm not off-roading in a lower gear, then I'm looking for economy on the highway.
Driving through the mountains and in town traffic, I turn off OD on the 100 and my other vehicles with this option. Nothing new there.
Thanks to Jason Harris at Ozark Overland Outfitters for installation and Cruiser Outfitters for stocking this part, I am very satisfied with this modification.
Specializing in Toyota Land Cruisers
Full service shop providing all your offroad parts, and fabrication and Mechanical needs. Ozark Overland Outfitters, 80 series, 100 series, 200 series.ozarkoverlandoutfitters.com
Sumo Gear Land Cruiser Transfer Case 3.1:1 Low Range Gear Set - Fits 8x/100 Series
Low Range Gear Reduction Sets for Toyota Land Cruiser Applicationscruiserteq.com
Just curious if I install the 10% under drive high range gear set, would that also have any effect at all on my low range gearing? I’m going to order some gears from Cruiser Outfitters in the morning.
If you really wanted to, you can use 80 series gears (in 5.29 ratio). But you would have to piece together a hybrid rear locker.If I upgrade my 4.10s to 4.88s (this is primarily an off-road rig) then the lowest possible crawl ratio on a 100 series will be 56.9 to 1 with BOTH Sumo Low and Sumo High Range reduction gear sets in the T Case.