Front Diff. Gone - Need help understanding some things. (1 Viewer)

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LandCruiserPhil said:
....
With increase of tire size you effective 1st gear ratio with a 5speed and 35 is lower then a 4speed with stock tires (If my paper napkin calcs are correct):D
....
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That doesn't bear on the differential gearing for either.

Based on my experience if you want lower off road gearing the differential is the wrong place to do it.
 
Engine ER I am in downtown but roots are from Katy area.

Honestly I have a much better understanding now than I ever did prior. I want to build a solid rig and I want to continue to run 35" tires. I plan on adding sliders next and bumpers and skids to follow so there will definitely be added weight. It did feel sluggish but I have had it with stock wheels so I am just feeling the difference from those to 35s. I don't want to break into my diffs and not wish I had dine something later after building it up more. Diffs are going to break from improper use but why would you go into them and not replace the weakest point regardless of it being broke or not?

The plan so far since parts have already been ordered and shipped as of yesterday is I am going to remove the front diff and rear 3rd myself and take them in for the rest of the work while I mount the compressor and run the wiring for the switches and mount the switches myself as well.

For those of you wanting to do this at Just Differentials right now you can get the ARB High Output compressor for free with the purchase of a a ARB locker...just a FYI

Thanks for the tire gear ratio calculator I had seen it before and was looking for it again but couldn't find it. I think I am going to be pleased with the 4.88s. Its a solid investment for this thing IMO.


sorry for typos...typing from the phone gets tricky
 
Solid plan.

I'd love to see a DIY write up of the complete removal / re-install if you took pics and have the inclination to do so.
 
I definitely plan to do so but I will tell you this... would be up creek without a paddle if it werent for my friends who both graduated from UTI for mechanics and both were Lexus Technicians at my local dealership. I have the complete directions from Lexus with blow up diagrams and step by step guide. So with these guys for help and the access to the documents from Lexus I am excited to get after it and get it completed. I am looking forward to getting a better understanding once I start pulling out the diffs as well. I will add the parts list to my build thread later today when I get to my computer.
 
rusty_tlc said:
The same place Mr Toyoda did it, in the transfer case.
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Haven't heard of anyone here doing that, didn't realize it was an option for the 100.
 
Lower T-Case gears are great for off road but the axle ratio plays a part too. In my case, I need the gearing for pulling a trailer on the street and low range t-case gears won't help me at all. Also, most of the "wheeling" my sees is in high range but slow speeds. (i.e. rough logging roads.) You also need to think about the added weight and rolling resistance of the 35" tire. (Especially if you "only" have a 4-spd, like me.)

IMO axle gearing is the way to go for 99% of the 100-Series being built. It will put them at a slightly lower over-all in any gear (trans or t-case) and be exactly what they need for how the rig will be used. Now if you are talking about a rock crawler, that's a different story... Then again, nobody that I know of are using the 100-Series to that extreme. It wouldn't be the right tool for the job.
 
OregonLC said:
Haven't heard of anyone here doing that, didn't realize it was an option for the 100.
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Mine's been sitting on the floor of the gayraj too damn long. Between this, that and the other thing the t-case swap out has been delayed beyond embarrassment.

Maybe this weekend!
 
spressomon said:
Mine's been sitting on the floor of the gayraj too **** long. Between this, that and the other thing the t-case swap out has been delayed beyond embarrassment.

Maybe this weekend!
Click to expand...

I told ya, become a neighbor and you'll get some help...
 
spressomon said:
Mine's been sitting on the floor of the gayraj too damn long. Between this, that and the other thing the t-case swap out has been delayed beyond embarrassment.

Maybe this weekend!
Click to expand...

The install will test your press skills;)
 
Its already done. I've got a spare t-case...I completely overhauled it, new bearings, shims, etc., apart of the Marlin gear install. Had to fab a couple press tools but no big deal. The most challenging portion of my project was getting the preload on the output side set properly. I followed the FSM to the letter but preload seemed too light...in the end my group of peers (Robbie!) came through for me!

Long story short...but hopefully we'll get it swapped soon.
 
spressomon said:
Its already done. I've got a spare t-case...I completely overhauled it, new bearings, shims, etc., apart of the Marlin gear install. Had to fab a couple press tools but no big deal. The most challenging portion of my project was getting the preload on the output side set properly. I followed the FSM to the letter but preload seemed too light...in the end my group of peers (Robbie!) came through for me!

Long story short...but hopefully we'll get it swapped soon.
Click to expand...

Well get busy:flipoff2:......Sounds like you built it to last a life time:cool:
You will love the difference.
 
spressomon said:
Mine's been sitting on the floor of the gayraj too damn long. Between this, that and the other thing the t-case swap out has been delayed beyond embarrassment.

Maybe this weekend!
Click to expand...
You know my number.
 
spressomon said:
Its already done. I've got a spare t-case...I completely overhauled it, new bearings, shims, etc., apart of the Marlin gear install. Had to fab a couple press tools but no big deal. The most challenging portion of my project was getting the preload on the output side set properly. I followed the FSM to the letter but preload seemed too light...in the end my group of peers (Robbie!) came through for me!

Long story short...but hopefully we'll get it swapped soon.
Click to expand...

Spressomon what was the cause of swapping t cases? Just to have a more solid drivetrain or did you have issues with your prior t case as well?


Parts are in by the way, this stuff is heavy it all weighed over 100lbs, i should begin the work on it this week, ill post some pictures up when I can.
 
Its a long story Reno. But here's the shorter version: My exacerbating experiences with the incompetent gear set-up from Sean at River City Differentials in Sacramento (this experience alone could fill several pages :mad:) culminated with a blown rear pinion bearing, et al, just outside of ABQ apart of a trip back in 2009. Ali, Onur/beno, CDan and Scott and Albuquerque Brake and Clutch and crew came to my rescue...all good from that perspective.

We were unsure if the t-case overheated due to heat discolored output side shims, etc., so to alleviate any issue...since I was on the heels of 3+months of on/off-road explore all over the western USA I opted to swap it with a new t-case.

When Marlin intro'd the gears, and with my buddy Ali's experience with same (Mark's) in his 80 I pulled trigger last year...and decided to do a full rebuild on the original and now spare t-case. I wanted to learn the process #1 and #2 put to bed any potential issue that may/may not have been present in the t-case.
 
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