rodent_infested_03

03 GLE auto. At 70-75 the tach is around 2500. If I let off the gas it wants to slow down fast. As if it were a standard. Or as if there was no overdrive. Is this normal for this transmission?

DennisMik

iTrader: (2)

An auto trans car at 2500 rpm should be doing about 72 mph. That's with overdrive engaged. When you say the car wants to slow down fast is a subjective statement. There is a lot of wind resistance at 70 mph, so that would slow the car down. I'm guessing that what you are experiencing is normal.

maxiiiboy

There is a significant difference in how much the engine breaks depending on whether the "Overdrive" is engaged or not. In Overdrive, there is almost no braking, and no slowdown when you let off the gas. Without Overdrive, engine braking is quite significant. The slowdown you are experiencing suggests your Overdrive is disengaged (or otherwise disabled). On the other hand, your RPMs (~ 2300 @ 70 mph) suggest that it is engaged. With this background, a few more rigorous experiments should answer your question.

rodent_infested_03

I checked again, and the tach is 2500 @70mph, close to 3k@ 80. The engine braking is very noticeable, more like a standard than an auto. Switching between 3 and D doesn't seem to make any difference. My other vehicles with 4 spd OD do not exhibit this. They are both around 2k at 70, with no significant engine braking letting off the gas.

I searched the forum to see if this has been posted before and there is a procedure to test that creates a flashing code via the AT light on the cluster. Not sure if i'm doing it right because whenever I try to do the procedure the car starts to roll away in D or 1, 2, etc.

rodent_infested_03

Also noticed is if I step on the brake, the shift area of the center console makes a clicking sound.

maxiiiboy

It looks like your OD is not engaging, or that your TC lock-up is not releasing. Is the red OD light on the instrument cluster ON or OFF?

rodent_infested_03

I have not seen a red OD light since I have owned the car

rodent_infested_03

The transmission fluid was really dark when I acquired the car. I don't think any maintenance was ever done on this vehicle. The shifting was really clunky so I tried exchanging a couple of gallons of Dex 3 through it. It helped the shifting a little bit but still engine braking at highway speed. Should I try exchanging another couple of gallons through the transmission cooler return line and see if that helps?

maxiiiboy

Yes. I would do 3 or 4 consecutive Drain&Fill's. Use Valvoline Maxlife ATF; it's fully synthetic and only $17.97/Gal at your local Walmart. Also, if you want to be really diligent, drop the AT pan and clean the magnets and the filter.
Re. the RPM metric: On my car (2000 SE/AT): 2000 RPM at 60 mph, 2200-2300 RPM at 70 mph.
Re. the OD light: The light (and the OD itself) are controlled by the OD toggle button on your AT handle. The light should be ON (orange) when the OD is disabled, OFF (not lit) when the OD is engaged.

J P D

At 2500 rpm my 2000 SE/AT does 74 mph w/the button OD.. Same rpm gets me 80 in 6th with the 2002 SE/6M.
VQ30DE vs VQ35DE

AaronL

iTrader: (1)

Do the same thing and put it in neutral. Does it slow down less?