ex4Rings

Thanks in advance.

desired_speeds

yes. S320 and S500 trannys also work

ex4Rings

Awesome thanks, I had one mechanic tell me it would work then another tell me it won't since the '99 was newer the electronics would not match up.

Vasir

Uh.....NO! I went through a mess of issues when my s320 needed a new tranny. My understanding is that 97-99 are different from 92-96. I had a mechanic install a 1995 s320 trans in mine and it wouldnt work. ended up getting a 98 s320 trans to put in it. Ask a Benx mechanic that specializes in the older models. throw a 50 at him and ask 20 questions. they will be good answers since youre paying him for your time, and you will be saving/making it back really quickly.

ex4Rings

Not sure what your mechanic did, but the '96 went in straight forward and has been running great for almost 2 months including a trip from DC to NY and DC to SC. Maybe its something with the '95's.

oldsinner111

My S320 could use a heavier transmission.You say I can use a 500s? I need it as I make 355 hp with nitrous.

MEPEHcali

The gearing is different on the [420 500 and 600] from the 280 320 and i believe the rear end will be different gearing too.
You need to install the one with matching gears or your engine will labor too much or rev too much.
1996-1999 has the 722.6 5-speed electronic transmission and will not be compatible with the pre 1996 4-speed Transmission.

Spraying NOS in a 320 is not that far from turbo charging a Honda Civic. The resources of the engine just aren't there. But whatever flips your cookie...

The reason the dealer charges a lot is because a rebuilt tranny will most likely have an upgraded conductor plate that needs to be in sync with the control module. So the TCU needs to be replaced too, another 700-800$ for part & labor.

Most of the times the 722.6 requires easy fixes if you know where to ask.
I'm fixing mine currently

oldsinner111

agreed I rather have the stock turbocharging unit sold at dealers for the s320.Those were capable of 450 hp and reliable.

MEPEHcali

Well, you can't just attach a turbo to your engine and get 450hp from the 200 stock. You need to lower the compression to allow for the boost. New engine management firmware and better gearing. Boost control needs to be added too.
At that point, selling the 320 and getting a 600 makes more sense.

oldsinner111

350 at the whheels is all I want the power of a v8,yet the 30 mpg of a 6.

eddie a

This is not correct, S320 and S420 transmissions are completly different, will not work..