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the performance models are going to need to dissapate more heat on the fets, so cooling is probably more critical than base models.

i would think the seal would last much longer since the atf is a better lubricant than water and coolant. the dextron should have higher viscosity over coolant on an existing leaking seal, leading to less wear on the seal and less heat buildup on the shaft surface. atf seems like a win vs...

Quite interesting about the 1/8" hole where coolant passes, I would think the amount of surface area to be cooled would be quite limited then and Tesla maybe just figures the shaft might warp after 150-200k miles vs. the coolant dillemma. I would opt for just doing a coolant delete and take the...

Thank you guys a ton for making this. I've been contemplating parting with my P85 and opting for a 90d setup to get rid of the LDU situation. I have not been following this situation for half a year or so, my P85 now has 82k miles (2013) and the drive unit was replaced at 30k miles. I haven't...

Nicely done. I haven't had any problems thus far w/ my setup, but the smaller hose concerns me for areas that use the a/c quite a bit w/ the potential buildup in the tube.

wow, so 120k avg per battery. how many drive inits so far?

I will find out in a bit of time whether I get any buildup. On my setup the final discharge is at a steep downward angle so the fluid should not build up once it reaches the last leg of the drainage. There are over 20 small holes on my setup for the bug screen - I would think it would take a...

another great post. if possible please include skf part for socket- another expensive but necessary tool. its quite the task for a non machinist. i dont have a lot of experience pressing in bearings. sounds like i will need help the first time too when my du goes.

updated drain setup including bug guard on the drain end. also fabricated a custom 90 to use with 16mm heater hose where it meets the 14mm drain tube on firewall. no clamps needed, all snug press fit. used zip ties to keep the 90 bend on final discharge away from the rack and pinion by securing...

The quickjack seems really great for this application and maintenance, but at $2200 or so I might be better off doing a 2 post lift in my 40x60 shop for $3500. Would be great for most owners to do general maintenance besides a battery drop. I have too many cars and projects and the lift is a...

I would be curious if you have checked the speed sensor for moisture and coolant. Yours is still under warranty for a few years; if you ever pop the aerosheilds pls take a pic of the PN# on the bottom of the DU. That might give the rest of us some helpful info.

How many miles do you have on your drive unit to date, and is it a 2016/2017 model? I am now curious as my replacement unit appears to be a 2017 T model for the p85 and it might not be a refurb after studying the part number. If I remember correctly, you have over 100k on the same DU. Not...

Hi Daniel Thank you for the reply. I am most interested in what you used to R&R the unit, similar to what howard64 has done here. You seem to have a nice setup to R&R these. From howards experience, the motorcycle jack was quite critical to removing the unit safely without damaging anything...

I'm a short ways from you in chico, any advice you could lend to us here on R&R and retrofit would be appreciated. I expect mine will need work in the next 12-24 months (e.g. another 30k miles).

hi Howard i recently bought the car from the second owner. he stated the du was replaced in 2020 and was under the impression the car had 47k miles and was likely a revQ based on the date. Tesla confirmed the unit was done in 2020 w 30k miles. i cant get the original paperwork due to privacy...

i carefully wiped the sensor down. i found one drop that turned a napkin a tint of blue on the bottom side of the sensor, but not enough to concern me. the unit is a august 2017 original reman. i tried to get a pic inside the reluctor but will get a cheap borescope next time, cant tell if there...

i used two jacks and pucks today to lift the car. pulled the speed sensor. i see a thick layer of brown grease on the top of it. put my finger in the hole and found more grease, but dont see coolant. might need a cheap borescope to see in the reluctor wheel area. attached pics.

I doubt the front portion of the vehicle will reach anywhere near 85c (185f), those temperatures are normal in an ICE vehicle under the hood. Most honda's have 180F thermostats and most everything under the hood of an ice vehicle is rated for at least 105c (221F). The battery case and a/c...

I am probably in a similar situation. I have a revQ DU installed in 2020. Previous owner told me it was replaced at 47k miles, but after my visit to the SC this past week to ask some questions (I need a tow hook and had questions about a brake job) the DU was replaced w/ 30k miles. The car...

I went to my local sc today and asked about getting the previous invoice on the replacement battery pack. I have a current invoice from the previous owner; but they would not give me even the owners paperwork I bought it from; even though I showed them I have paperwork from him. I am not sure...

I'm on 2022.24.8 right now w/ a Feb 2015 refurbed pack done in June 2022. Software update went out on my 2013 P85 Model S last week. I sure hope they don't have code in these to withhold some of these messages under the warranty timeframe - technically they may even know the warranty on...

That's what I am wondering too... I have a hunch I posted about earlier where I believe the 80A L2 chargers at home may do a better job at drying out the pack on a weekly basis to prevent the corrosion death of the bms on the battery. This is only anecdotal information; but I know of at least...

Very much appreciate this information; the vents at least on top of the penthouse cover look brand new; hopefully all the vents are new at this point including the side vents. Feb 2015 is about the same timeframe Jason mentioned where Tesla started fixing some of these problems - it was...

Jason, I went under the car and here is the battery info. Not sure if this matches up w/ the older packs. ASY,HV BATT, S3, BB, DUMO, REMAN. 85KWh,400VDC PN# 1088934-01-E The battery was installed in June 2022. Ordered 4/22. The bottom of the battery enclosure looks brand new. Not sure if they...

I have done some more thinking on this whole situation with the moisture, and I have a hunch- I believe there is a possibility that using the dual chargers (80a) on some models (about 19kw) may generate enough heat in the pack to help dry out the moisture, especially those who do this daily for...

I start to wonder about the supercharging as well... those of us with lifetime free are told to l2 charge at home to "save the battery" when this may not really be a huge factor as the bats are all dying from moisture issues vs. fast charging. i supercharge a few times per month in town and...

Took a day to clear up the alert FYI. Checked pressure w/ gauge, 42psi.

Jason, I want to personally thank you for bringing these issues to our attention. After seeing the pictures of the damage to the penthouse bolts/screws and water ingress there from another poster here today, I think just extending the drain line for those of us affected may very well add years...

The engineer who thought it was a good idea to have water drain onto a $20k battery and cause corrosion problems w/ the pack I hope no longer works for Tesla. We had a joke at my previous engineering job, "never give a programmer a screwdriver". This is case in point. You can easily see the...

I appreciate the feedback on the age of the pack. So it seems like even though this one was a factory refurbished unit in 2021, they are effectively recycling the pack housings all the way back from 2012-2013 timeframe up to current models w/ refurbished cell assemblies. At this point I would...

Pictures of the AC drain line extension installation - e.g. DIY HV Battery Saver Project

If I was in your situation; I would see if wk057 can just downgrade the pack to a 75 w/ a bms from a donor if it's only one or two cells that are done. That would be the preferred situation for most of us w/ older model s who don't want a $15k bill and get another 2-3 years out of it for less...

I ended up extending the a/c condenser drain line on my model s today. Most PIA part of the job was removing some of the carpet to get access to the tub extension that needs to come out to reach the A/C drain line and re-installing that carpet w/ a screwdriver. Since my current pack only has...

Jason, I have a 2013 model S P85 here and the pack was replaced by Tesla in 2021 w/ a refurbished unit at a cost of $14k. Is it possible to extend the A/C drain line away from the pack on these so we don't get standing water ingress on top of the original? I don't know if there is any further...

I had two tires replaced today at America's tire - says tires pressure very low. I did the two finger salute and reset and the problem still persists. I have a honda odyssey (2007) w/ 213k miles on it and have never had issues w/ the tpms after any work done on the car in the last 15 years. I...

I would buy a couple of the jack adapters that fit into triple hole the jack points on the car, purchase two floor jacks from HF or similar. It's not cheap. You could then get the wheels 12-18" in the air. I would put a block beneath the jack once it's up or manufacture a piece of wood to fit...

Please let me know what you'd like for it and if you can ship. I can send you my ph# over direct messaging.

I was going to ask you about maintenance - how often have you done coolant drain/fills of the system as well as gearbox (ATF) changes? Your unit is special and I would love to know if you happen to have a triple lip, double or single lip seal for the coolant seal.

So basically other than swapping a bms from another battery, reducing battery capacity vs. swapping out the entire pack is not really an option for a single cell failure in the entire pack is what I think you're trying to say. Is this workaround a software/can hack or hardware R&R removal, copy...

That's great you have 150k out of the last unit. I am curious what version you have. It would be nice to know if the 3 lip seal on the coolant is present on these vehicles here which get 150k out of the drive unit. Another user here, ucmndd also has claimed to get 150k out of his 2016 or so...

Based on that forum, the triple lip seal is 30x55x8 size - SUS304 SKF part for large drive unit. It would be nice to have validation from someone else using it as the replacement.

My point here is that the BMS was designed to not allow downgrading of the pack on repairs (It's programmed for the full pack capacity, and cannot be modified based on Jason's (wk057's post) due to OTP flash. If a single cell in a module fails out of the 7000 or so cells in total, the pack is...

My 2013 p85 model s had the Du replaced in 2020 w/ 47k miles. Now have 62k miles and think this is probably a cheap investment since it's out of warranty. Biggest issue is getting the vehicle to you 400 miles away. Have you considered selling a kit w/ the drains for those willing to DIY out...

What is the estimate? You might want to call qccharge and see if they can fix it.

Wow, so if you have a 85kw pack and a module happens to fail for some reason, or a bms fails, the whole pack basically has to be replaced. You can't remove one of the 5kw modules and stick with the remaining 80kw... I have a new battery pack in my 2013 p85 model s that cost $14k and this...

You are the exception. What make/model/year do you have? I have a 2013 model s p85. I talk to other model S owners at superchargers, one other 2013 model s owner has had his replaced 4x now at 115k miles that I spoke with last week who went all the way from Medford, OR to Chico, CA as this...

15k seems excessive, I normally see $7300 as the number. qccharge claims about $4k rebuild in socal. 2013 model s owner here and yes, these failures are pure bullshit for a vehicle that is over $100k new and new DU's every 30-50k is ridiculous. If they failed every 100k I could live with that...

As I understand it, there is no longer a warranty on the DU since it was replaced under warranty in 2020. The car is now 9 years old. The battery was done in 2022 and should have the 4 year warranty. So basically what you are saying is that the o-rings could possibly be replaced pro-actively...

I have a 2013 model s p85 w/ 62k miles, the DU was replaced under warranty in 2020 with less than 50k miles. New battery in 2022 with 60k miles ($14k). Does anyone know if Tesla has actually fixed the large (sport/performance model) drive units on the replacements? I know Rich Rebuilds ended...

Hello I bought a 2013 model S performance w/ 61k miles and love it. We have six children and need the rear two jump seats to make the car usable on a daily basis. I am also exploring the possibility of modifying a seat in between the driver/passenger to make it a true 8 seater sedan from a...