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Update: OSG TY391-HC TCD is on order as are the urethane bushings to hang it and eliminate wheel hop! Looks like it has to be built in Japan so it's 6 weeks out!
The plan has two paths:
A) pull my 327 diff, pull the carrier and ring gear, transfer ring and new TCD to case, bolt ring to TCD in the case, assemble and check clearances. If all goes well, install in car. Turn time, maybe 24hours.
B) If plan A fails, install back up diff and sort out the details like, grinding the case or ordering shims so the clearances are correct.
This is going to be great! Is it a must with urethane bushings to eliminate wheelhop? Or would reinforced/motorsport rubber bushings do aswell?
Thanks. I would say so as the rubber ones are like springs and allow windup and rebound whereby you get the tail in a chatter which is where stuff gets broken.
I have access to a lathe and mill and honestly contemplated spinning up my own parts but I'm getting lazy these days. I'll look the other way on the price tag as that is seriously over inflated this item. Rancho and others would sell this for maybe $80 and sell a million. These guys would rather sell 12 sets a year I guess.
The other option is mounting the front solid which works in some cases.
Last edited by 2013FSport; 12-06-19 at 01:10 PM.
Reason: Runner is not rubber. Stupid phone!
OBD Fusion app and Lexus Toyota PID pack = must have tools
Everyone should own this tool and when coupled with the Lexus PID pack, it gives you access to a lot of detail about what your engine, trans, power steering is doing. I should probably start a new thread but thought I would say that if nothing else, load this app to read the transmission fluid temperature and you will get a good idea of how long you can idle to check your fluid level at 100°F.
So for anyone diagnosing transmission problems, you can see details like input turbin speed, when its in lockup, output shaft speed and likely a bunch of other stuff I haven't tried yet.
We should start a list of things that work and things that don't work.
Speaking of; anyone try a port scanner like Elm 327 V2.1? Does this get us access to the other networks like the TPMS, body and airbag data?
That's not a bad idea to start a new thread. I tried using the ECU Tuning Q&A thread years back for getting discussions going on datalogs but no one replied back (though you were kind enough to provide me with a like. ): https://www.clublexus.com/forums/per...answers-5.html
That's not a bad idea to start a new thread. I tried using the ECU Tuning Q&A thread years back for getting discussions going on datalogs but no one replied back (though you were kind enough to provide me with a like. ): https://www.clublexus.com/forums/per...answers-5.html
Lol....
So make a digital gauge set adding:
Toyota Lexus PID, Engine:
RPM
Speed of NT (turbin speed) trans
Speed of NO (Output Shaft) trans
Trans PID:
Status of Lockup.
Not sure why NO is not under trans while NT is.
Now take note of RPM vs Turbin speed even when locked and you'll notice some discrepancies. OR is my torque converter slipping?
And ya, TCU data lags. Is this part of why the trans shift lags under manual control?
Add trans temp for good measures and maybe engine temp.
PS - Don't look at trans temp when at the track. You'll want to change your fluid more often or add a cooler that switches automatically... On my DD it takes 35min to hit 200°F. When thrashed on a bit, it climbs and stays for a while while engine temp hangs at 187-190°F pretty consistently.
I'm just saying that knowing what it does on a good day could be helpful on a bad day.
FWIW: here are some wiper blades refill part numbers. Cost is less than $14 at any Toyota dealer. This is the rubber blade only. No metal guide band or blade holder.
85214-0E140
85214-0T040
Add trans temp for good measures and maybe engine temp.
PS - Don't look at trans temp when at the track. You'll want to change your fluid more often or add a cooler that switches automatically... On my DD it takes 35min to hit 200°F. When thrashed on a bit, it climbs and stays for a while while engine temp hangs at 187-190°F pretty consistently.
I'm just saying that knowing what it does on a good day could be helpful on a bad day.
I'll need to remind myself to observe the engine and transmission temps the next time I do a HPDE event as I haven't done so in the past. Both the engine and transmission fluids appeared to have held up well at my last event (as I received no warning on the dash) though I couldn't say the same for my brake fluid which did boil over during a high-speed straight on the track.
A follow up to post #111 and also posted in the Performance thread section under Drivetrain Power Losses.
Below is a calculation vs real world data comparison of what is happening in our trans and diff.
A couple of constants:
1 mile = 5,280' or 5,280 * 12 = 63,360"/mile
If we take our 255/40/R18 tire and do some calculations (or measure it) we find it's roughly 26.03" in diameter. From this:
26.03" X 3.141593 = 81.7756" circumference.
63,360" per mile / 81.7756" = 774.8027 revolutions per mile.
Now we take our 4.083:1 diff and get the input shaft speed.
774.802 revolutions per mile X 4.083 = 3163.5194 rev's per mile at 60 mph
Drive Shaft 3163.5194 Rev's per min / 60 min = 52.7253 rev's sec.
Now look at some live data from Fusion App. On the left we have the Engine RPM at 2,323RPM and input shaft RPM at 2,300 RPM into the trans after some loss through the torque converter even though it is in Lock up as seen by the #1 at the bottom. Nope, no loss there. lol
The input into trans is 2,300 RPM. Trans is in 6th gear. See Chart Below. Now look back up at the Speed of the transmission output shaft as reported by the trans TCU to Fusion "Speed of NO" = 3,900 RPM and look at the vehicle speed @74mph as reported by the app.
Finally | Vehicle speed = 74 mph X Shaft speed of 52.7253 rev's min = 3901.6739 RPM which is what the app says at that speed. See chart for 6th gear ratio.
Notice on this chart I used 2,300 RPM as the input into the trans bypassing what was lost in the Torque Converter. Mind you this app shows numbers like Engine RPM vs Speed of NT as having a difference of 1,200 to 1,600 RPM when launching. Someone paid more than me can calculate the loss while in the in fact the converter is doing its magic slipping. Hint it is not in lockup while at WOT.
Not responsible for conversion errors. One observation about pulling data from the TCU is that it is slow! It has LAG! Almost like it has the same amount of lag as our paddle shifters! Could it be pipeline issue where this bus is just slow?
Take alot of pics of the rebuilding process if you could. I've done a good amount of swaps and trans rebuilding on my old Honda Civics (manual trans only); but I'm curious what all needs to take place to get these 2IS pumpkins taken care of. Perhaps it deserves its own thread!
Take alot of pics of the rebuilding process if you could. I've done a good amount of swaps and trans rebuilding on my old Honda Civics (manual trans only); but I'm curious what all needs to take place to get these 2IS pumpkins taken care of. Perhaps it deserves its own thread!
He's right you know... Patiently waiting for pics.
So, ya.... This leaves lots of time to plan ones attack! Yep! Part of me likes the no case modification, just drop the carrier in and marry them (ring and TCD) in place. If however, there comes a day (much later in life * I hope *) where the carrier needs to come out, that will have its own complications.
Anyone ever seen these listed for sale for our application?
It doesn't look very complicated... that's what I told myself everytime doing the work myself. It usually ends up taking much much much longer than just couple hours from a skilled technician, but it's a rewarding experience.
It will be really helpful if you could share the process in detail. I would like to swap LSD myself as the last project on my IS350.
challenge, but no trick, right? while doing some research, I wonder...... ummm....
12-05-19, 10:17 PM
): https://www.clublexus.com/forums/per...answers-5.html
challenge, but no trick, right? while doing some research, I wonder...... ummm....
