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Reverse is easy, there’s a plug on the AR5 that looks like a 1” nut filled with epoxy and has two wires potted in the epoxy. You just splice the IS300 reverse wires into them.

Cruise probably won’t work without a manual ecu. It requires all the throttle sensors - Apps1&2, tps1&2, and the dbw controls to function. Do you have any CEL’s? How about your VSS, is it working?
VSS is working surprisingly. Must be wired differently on these cars. Yea I figured reverse out. I’ve got a manual ECU but didn’t know if there was a way to do it with the auto ecu still in place. Yes I have CELs but I haven’t checked them yet. Trying to get everything cleaned up.
 

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After 3 years of good use my driftmotion steel 1 peice slip yoke driveshaft now has a vibration.
Does that CV peice need to be added or do I have to go back to 2 peice. My driveline angle is less than 1/2 a degree. I really feel like that flange adapter should be rubber.


133333
 

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I found someone selling an AR5 swap kit for the IS300 but the transmission is from a 2016 Polaris Slingshot. It uses a Verossa shifter extension to get the shifter in the right location and everything else is supposed to be the same as the 06 Solstice AR5. Has anyone else heard of Slingshot AR5 being a viable replacement for the 06 Solstice?
 

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I’d say if it’s overall the same length, it should fit. It has to have the mount on the bottom of the transmission, not the side though. The 07 & up Solstice switched to a side mount trans. It would take some custom fab to work, but not impossible - just not plug n play. I’m not familiar enough with the slingshot to say with certainty. You are correct about the Verossa shifter extension being used.

Can you post a pic of the trans crossmember mount? That would help.
 

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Has anyone broke yet? I'm getting my driveshaft reworked soon for high speed vibration and just was wondering if anyone has broken and know why. Ive gutted the complete rear to 3195lbs where theres only a gallon of meth and a pump in the rear of the car. Front is Lexus, rear is racecar :). Still sitting at approximately 650whp at 30psi on a 6266 with E85 (70%) 50/50 meth/water, spec twin disk, and MT drag radials on rx7 FD wheels. I havent launched at the track but have on the street many times and plenty of roll racing coming off a brake boost with a 4 port controller holding the wastegate down and flatshifting. I really wanna break it so I can find the weakpoints and build up another.

HAS ANYONE BROKE IN A IS300 CHASSIS!!!?

Ps: its crazy seeing these trans on eBay in a 2018 version from the polaris slingshot. I saw one for $550.

Shes ugly but she moves and doesent cost me a whole lot.
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The've gone up in price a bit since I bought my sub 1k mile one two years ago but not so much as to suggest that they are da holy grail.

So are you asking whether someone has broken a transmission so that if not you can go ahead and break one? Or an IS300? What's preventing you from building another one?

I got kinda lost. Sry.
 

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Theres one on eBay for $550 right now. I periodically come in and give update on how its going and ask if anyone has broken their trans or had problems in a is300 chassis/weight.:unsure: Have you had any problems?
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Ohh. I haven't had problems with mine but I don't really track my car or anything. I installed a short shifter at the time I swapped it and I'm not in love with it. Honestly, if I were shooting for power (and knowing getrags are not an option) I'd go T56. I think I saw something, either in ClubLexus or SF about a complete kit for less than $4k. That sounds like a lot of win to me.
 

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Discussion Starter #153
Does anybody know if a r154 trans mount will bolt up to an ar5?
there are a few different versions of the r154 mount, i tried 2 different versions, the mk3 didnt, the jzx only 2 of 4 bolts worked. is there a reason why you dont want to use the solstice one? there $30 at the local parts store.
 

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Curran, do you still have your twin plate setup and how has it been for you? I was looking to get that kit but there is confusion with the vendors lol. I’m like I know it’s been done lol.
 
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