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Follow up and new challenge: 745T V8 Tune up


Hi all,

THANKS for the advice a few weeks ago- the car's running great after a basic tune up.( 89 740 w/ 1990 5.0HO and AOD) Amazing how performance can degrade little by little over time.Drivability is excellent.I replaced the coil and distributor along with the other usual items..
My latest issue is the transmission ( or possibly the linkage). It's a 1990 vintage AOD- it gets the job done, but it's kinda lazy. As of yesterday,I seem to have all forward gears, but no reverse. However, the PRNDL seems to be off- I can be in park and still drive away. I wonder if I'm just not able to engage reverse because the cable is out of adjustment. It also refuses to kick down, but it will engage a lower gear it I shift it manually. I'm using the stock Volvo 740 shifter...

I'm going to take it to the rebuilder next week anyway as it's time for a fluid/filter change, and I was thinking of having them put a shift kit in like the one described below:
B&M 40263 Shift Improver Kit Automatic Transmission Kit
"Provides Crisp Shifts
On Any Stock Automatic Transmission
Eliminates Soft/Sluggish Shift
Eliminates Shift Overlap
Eliminate Clutch and Band Wear"
It's had a stock torque converter all along...Would getting a different converter make a big difference ? I'd like slightly firmer shifts,but nothing severe..Not sure what my stall speed is.

I'd like to get some more service life from this unit - if any of you have any advice or comments re other shift kits,suggestions ect., I'd appreciate it...Thanks ! Bill
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    Follow up and new challenge: 745T V8 Tune up

    I'm using a "trans-go" shift kit on our built AOD (I think it's their AOD-HP kit). We've had good performance from it for the past 15 years or so.

    Here's a link:

    http://transgoonline.com/products.php?cat=AOD&homeinclude=catalog&category_id=75&parent_id=75

    I think you may need to check the linkage under that car--sounds like something may be loose and is allowing the linkage alignment/length to change. You may also want to check and make sure that the grommet where the trans kick-down cable attaches to the throttle body lever is still there. The plastic ones can deteriorate over time, and when it goes, it can cause a variety of up- and down-shifting problems with the transmission.

    Let me know what you find out.

    Steve A-








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    Follow up and new challenge: 745T V8 Tune up

    How is your Volvo to Ford shift linkage handled? Your description of the issues could all be attributed to the linkage.

    I found that the Volvo shift arm is a couple inches longer than the Ford transmission shift arm. That means that the Volvo movement is levered up by about 25% making the position indicator way off. I addressed that by shortening the Volvo arm to the same throw as the Ford arm from 1st to Park. Using the original Volvo linkage, which is adjustable, gave me the ability to tune the PRND21 indicator correctly.

    This is described better with pictures here: http://forums.turbobricks.com/showthread.php?t=250597

    Being able to start the car in other than Park or Neutral is dangerous. That's why the start interlock.








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      Follow up and new challenge: 745T V8 Tune up

      THANKS for the education.This car's been a V8 since '05 and this is the first linkage issue I've had. I use the stock Volvo shifter/gear indicator,not sure exactly what was done underneath,but I can find out...It's going in for service next week (drop the pan/change filter-fluid/I'm told Mercon V is good for AOD's, maybe a shift improver kit),and I will use this information.
      My AOD is the"non-electric model, just FYI. And I was wrong about the Park position- the "Park" function works, in that the car will not move when the shifter is placed in Park, BUT when I give it throttle in Park it wants to move forward. The mechanism that keeps the car from rolling forward is working, it just also seems to still be in a forward gear. Update: I drove it briefly yesterday,long enough for fluids to reach operating temp.Most of the time I seemed to have all forward gears, but the the shift point for the OD/4th has risen by apx. 1000 rpm, and a couple of times it didn't shift into OD at all, just slipped. I would immediately let off and stop- when I accelerated back up to hwy speed, it would shift into OD just fine. Not sure what THIS means,but I guess we'll find out next week. Again, I appreciate the help. BK
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