Hello

so I have a 2006 gs 300 awd that needs a new transmission and I’ve been struggling to find a used transmission at a reasonable price for this specific year, I was wondering if the 2007-11 transmission would work since it looks the same and has the same name and I haven’t been able to find definitive information, also would wonder if the is 250 transmission would work,
thanks

 

How do you know it needs a new transmission? The 2006 GS300 has a common flaw with the ecu. The transmission module, has faults it will throw off the shift points. Maybe this is your issue, what many will do is remove there ecu and send it to a company called SIA Electronics, for like $120 maybe more now, they open and test the ecu and repair it. Maybe consider this before buying a new transmission

 

Mine isn’t having any shift point issues, it has had an issue with slipping when cold, and I’ve tried everything, fluid and filter change and magnet cleaning which shows signs someone had been in there before but the magnets only has typical wear metals and no chunks or anything out of the ordinary, numerous attempts to make sure fluid level is proper, it is and it’s only when it’s below 50 degrees f. Odd issue to me since you can put it into neutral then back into drive or reverse and it’ll hook up fine for a few seconds. Well the car also has a shift solenoid c problem where it refuses to shift past 3rd when it’s warmed up and has developed a serious leak from the output shaft which may be from my failed attempts to properly fill the transmission and I’ve probably overfilled it to the point it ruined the seal so I’m pretty much done with the transmission even though it drives so well when it’s working properly. And the prices for the 06 300 awd transmission are just so high it’s not worth putting one into this car and I could just go and put the money to a 350. The car has 262k miles on it btw

 

Have you tried taking the ecu to get it atleast checked out? Solenoids are a common issue with the 06 GS300, with a good scan tool you can ping test the solenoids with the car turned off. When you ping test the solenoids, you should be able to hear all the solenoids click, a bad, or sluggish solenoid should be noticable by the sounds it makes. Simply drop the pan and replace that solenoid.

These transmission are very strong, there actually the same as tundra. Of course you cant simply mount one from a tundra as all transmission have there little differences. Using a site like www.car-part.com will show you what vehicle your transmission cross references.

 

Do you think the ecu could be causing the car to slip when cold? It slips through every gear and it’s not like a 1st gear or reverse only issue, it’ll still shift but it slips moderately bad, fluid level is proper. I personally think there is possibly a pressure solenoid or something of that sort or an internal valve body issue that acts up when it’s cold but it’s extremely difficult for me to even start to diagnose it and I don’t know a good shop that would be willing to dig into this transmission and actually diagnose it than sell me a transmission. I would be willing to get the ecu checked out but there are other problems with the transmission as well. Also likely due to me overfilling the transmission and driving it the transmission has a rear output shaft leak which is pretty irritating but I guess live and learn. Is the rear output shaft seal easy to replace? Is it diy? The car hooks up and goes so good when it’s warmed up but it’s has a ton of these issues that are just killing me

thanks again

 

If it slips in every gear then that could be oil level is not correct. These aisin transmissions are sensitive to fluid levels. Maybe take it to the toyota dealer and pay to have a drain and fill, that way they set the fluid level correct. Your issue doesnt sound like an ecu shifting, nor solenoid. Maybe the transmission pump isnt pumping the fluid, or strainer is clogged, or fluid viscocity, but most common is the fluid level.

Did you use toyota WS fluid? As for the rear transmission seal, that should be striaght forward and easy to replace. You just have to remove the drive shaft and yoke to reach the seal.

If the toyota dealer prices are too high, maybe find a local transmission shop that specializes in toyota japanese cars. Either way, I wouldnt drive the car slipping as you can wear down the clutch packs

 

I’ll probably start with the output shaft seal, I doubt they are going to be very happy diagnosing a car with a leak, will I have to drop the exhaust? Is there any diagram or information you know of that can help me with. I have used a good WS equivalent called AMSOIL, I’ve used it before and had good experience with them and I don’t think this is a viscosity issue. Fluid level was definitely proper and was at one point overfilled a bit so I know it wasn’t low.

thanks

 

[QUOTE=ibidu1;11688504]How do you know it needs a new transmission? The 2006 GS300 has a common flaw with the ecu. The transmission module, has faults it will throw off the shift points. Maybe this is your issue, what many will do is remove there ecu and send it to a company called SIA Electronics, for like $120 maybe more now, they open and test the ecu and repair it. Maybe consider this before buying a new transmission[/QUOTE


also I didn’t get a straight answer on if the GS350 transmission would work or not. I can’t see why it wouldn’t, they are both the a760h transmission and visually look similar if not identical. The valve body seems to be the same story with little to no visual differences.

thanks

 

[QUOTE=Juiceman333;11690868]The only transmission that will drop right in is a 2006 GS300 AWD only! GS350 will not work! This is from www.car-part.com search engine, they cross reference parts from different models, sometimes even different car makes that use the same part.

Thats not to say that its impossible. Because the rebuild kit is that same part number. There might be differences you can swap around each to make it work