5 speed auto (1 Viewer)

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Dragos - I know it looks like you are having a conversation with yourself here but I appreciate the hard work and I am keeping a eye on this one. Thanks!
 
SCCThree said:
Dragos - I know it looks like you are having a conversation with yourself here but I appreciate the hard work and I am keeping a eye on this one. Thanks!
Click to expand...

Agreed, i'm simply lurking in this thread and I appreciate the info. I think there is a '04 4runner Limited V8 in my local PnP. Maybe I should pull the entire drivetrain out and hord it? That's a s*** ton of work though.
 
Dragos80 said:
Yes.
However, the V8 version is built up to take more torque. IS300 has less torque than FZJ80. I would prefer the one installed on a Lexus LS400/430
Click to expand...

If you're buying used, you'll likely want to do a rebuild on whatever you get right? My thought is to get the -least- expensive option you can for the fitment & bolt up to make sure this crazy idea works at all.

Then you can either buy the tougher one OR rebuild something like this $200 core with the tougher parts. They're the same casting, right?
 
Yes, you would want to rebuild it anyway. I did consider that path too. There are some "bulletproof" kits out there good for over 500HP.

I need to find out for sure if it will bolt up. Time to hit the junk yards.
 
Any updates? I keep looking for these around me. No luck yet. I’m half tempted to see if I can get one of these to bolt up to my 4bd2t using my A442 adapter kit.
 
I've laid down my theory as to why I lean toward the 650 over all the other ones.
For simplicity, cost, less headaches, less electronics to deal with, same physical size (I hope), no regearing necessary, etc



Here:
Dragos80 said:
There are a few reasons I discounted the A750F for this project.

-It belongs to a different transmission family.
-More electronics than the A343F - A650E family
-Does not bolt up
-Gear ratios are not well suited for the 1FZ engine (first gear is too short and the 5th one is way too long, making the engine rev up too much in first gear and lugging in 5th)
-not sure about spline count
-Those who have already regeared will redline the engine in 1st gear consistently.
-It simply throws the engine-gearing balance off, more than the Toyota engineered this combo to work well
-the 1st to 2nd gear spread is too wide (1.47 vs 1.27-OEM) which brings us back to the problem we are currently facing when shifting from 1st to 2nd with our current setup... too wide, falls on it's face worse when towing. Now, as a counter argument, a ratio of 2.042 is much better as a second gear ratio than the A343's 1.53 ratio.



1.......2....... 3..... 4...... 5
3.52.. 2.042. 1.4.. 1.00.. 0.716

With larger size tires the overdrive would put the engine at much lower RPM, possibly causing unwanted downshifts and simply revving too low (outside of the Toyota design specs)

Final gear in 1st would be 14.47:1 vs 11.52:1 (OEM) this ratio will increase depending on the axle gear used 4.11 vs 4.88 vs 5.29
Fifth gear would be 2.94:1 vs 3.09:1 (OEM).... but with larger tires this final ratio would further decrease depending on the size of the tires.
If paired with 4.88 gears, the first gear ratio will be crazy low and keep the RPM in a very high range (17.18 final vs 11.52- A343 with 4.11). 5th gear ratio with 4.88 axle would get you 3.49 vs 3.09- A343 with 4.11, which will get the engine in a higher RPM range on the freeway- Yes the larger size tires will reduce that ratio to a degree.





A650E

-might bolt right up (will find out soon for sure)
-same ratio of mechanical and electrical components and configuration as the A343F
-gear ratio spread is a little better, closer to Toyota spec for the given engine parameters
-same spline count
-same size as A343F
-regearing would not be necessary or required
-maintains a closer to Toyota spec balance between the engine parameter and gearing
-beter gear ratio spread between 1st and 2nd (1.17 vs 1.27 - A343F vs 1.47 A750F)
-will rev up the engine in 1st gear as much as with a theoretical A750 swap
-same as 80 OEM overdrive ratio, which will get slightly better with larger size tires, but too low of a ratio as with A750F


1........ 2........ 3........ 4...... 5
3.357.. 2.180.. 1.424.. 1.00.. 0.753



I really think and hope the A650 would be the perfect solution to our quest in swapping in a 5 speed automatic transmission, in terms of ease of swap, relative cost, keeping it Toyota, improving the gear ratio and extracting a greater ratio of power out of the engine, not having a bad experience while towing during the 1st to 2nd gear shift, street driving capability and pleasure would be better as well over the current 4 speed, no need to regear the axles or the transfer case and keeping the bad transmission gear ratios, might even cancel the plans for some to add a supercharger or turbo, it will not interfere with smog checks.
Click to expand...
 
Just to prove I am still moving (slowly) forward with this idea, I just purchased a shifter assembly off a LX430 as seen in the picture on the previous page.
I thought it would be wiser to start throwing small amounts of money at a time and stop if something indicates it will not working properly.
$65 vs $300 just makes a lot of sense right now. $300 being the price of a used transmission.

If the shifter looks like it can be hammered and duct taped well in it's location, I will move forward with purchasing a tranny.
This, of course, is different than paying for a tranny. I know how you people think and operate around here.
 
LS400 trans will work? Windsor Pick and Pull north of SF shows 12 LS400s from '90 to '98. Looks like they list for $99?

400-2 Transmission Rwd (Auto) Car $99.99
 
dirtyboots said:
LS400 trans will work? Windsor Pick and Pull north of SF shows 12 LS400s from '90 to '98. Looks like they list for $99?

400-2 Transmission Rwd (Auto) Car $99.99
Click to expand...

Only the last 3 years of ls400 got the a650e, IIRC. Before that I think it was a 4 speed auto. It did have a reputation for being pretty hard to kill, though. It's why they don't cost anything ... all supply and no demand for replacement ones.
 
Applications:

  • 1998-2005 Lexus GS 300
  • 1998-2000 Lexus GS 400
  • 1998-2000 Lexus LS 400
  • 2001-2005 Lexus GS 430
  • 2001-2005 Lexus IS 300
  • 1998-2005 Toyota Altezza RS 200
  • 2001-2003 Lexus LS 430
  • 1998-2000 Lexus SC 400
  • 2001-2005 Lexus SC 430
  • 2000-2004 Toyota Crown Majesta 4.0
 
You can set up a search on Row 52 and get an email alert when one of your target vehicles pops up at select locations. Based on my experience up here any transmission is $99. It could be that there aren't that many high end rigs on the lot (most of the cars up here look like clunker donations, etc.). Just a possible solution to getting a cheaper template, hope that helps.
 
Went to another local shop which used to fab and tune cars. No luck. Now they only perform repairs.
I went to a few local independent shops, but none of them would get onboard with this headache.

@2KCruiser would you consider taking on such a challenge?
 
It would be something we can do however with the current number of projects we have it is already very overwhelming. If things slow down, sure why not.
 
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