View Full Version : 92 SC 4R70W conversion videos

12-14-2008, 04:09 PM
Some of you may recall my rather unique transmission swap: http://www.sccoa.com/forums/showthread.php?t=96232&highlight=4r70w+swap

Here are a couple short videos of it working. I finally got a chance to convert them to *.wmv and upload them.

The first video is showing the basics, the second video is going for a drive.

Notice in the second video, in the first part throttle acceleration, I called it "calibration B", but was really referring to "calibration A"..



Calibration A shifts sooner at part throttle, with a full throttle shift at 5,300 rpm. Calibration B shifts a little later at part throttle, with a full throttle shift at 5,700 rpm.

The transmssion now has about 3,000 miles on it. It has broken in nicely, and continues to work absolutely perfect.

Working on "manual shift" mode this winter, upshift and downshift on the fly using the cruise control switches. Should be pretty cool.


12-14-2008, 07:59 PM
Thats cool, get rid of those TV cable issues for AOD users. Did you consider the AODE or just straight to the 4R?

91 XR7
12-14-2008, 09:46 PM
ever since i seen your original swap post i was debating doing a 4r70W swap into my '89 XR7 instead of a M5R2.. Also Feel that it would make good used of the 3.27s, and the wide ratio gear set is nice (well was in the AOD i had in my '91 XR7) Down side is, I don't know if i'm keeping the '89 (nor a '66 Comet)

Also in 2nd video, at the Calibration B WOT when it went into 2nd gear, did you let off or did it grab going into 2nd, then Downshift into 1st again then back into 2nd?

12-14-2008, 10:13 PM
The tires were spinning, so they spun all the way into 2nd, then hooked in second. When they hooked the car was physically only doing maybe 15mph, so it downshifted back into 1st as was appropriate for that speed and throttle position.

Those videos were made with 5% OD on the blower, to ease the trans break in.

Now, with the 15% OD on the blower, it just keeps spinning them in 2nd and will go between 2nd and 3rd pretty much until you take your foot out of it (if you can keep the car going strait for that long)