[427]

I have a transmission abnormaly that just doesn't make sense to me ... I hope someone can shed some light on the issue. Herez the situation: While traveling to work, I usually start coasting (foot off the gas) as I approach the long downhill off ramp. Next, I often move the shifter to the manual mode so I can utilize the transmission for braking ... The head-up displays 5th gear. When I downshift to 4th, I expect to feel some compression braking as the RPM increases ... But many times the RPM's actually drop and I continue coasting with no noticeable braking. (NOTE: Shifting to 3rd will generate increased RPM and braking.)

This only seemz to happen under this "coasting" condition. If I were on the gas in 5th and downshifted to 4th, everything acts as expected. Is it possible the difference is in the torque converter being locked or unlocked when shifting to 4th? Is this typical on the XLR or is it something I should be concerned about?

TIA,
427

 

[Caly]

Cadillac has put a high value on smooth and comfort, and the transmission programming reflects that. It take so long for the downshift when trying to use the shift to control your speed that it is for the most part, pretty useless.

 

[Guest]

When I downshift my V, I usually drop it down to 3rd gear, otherwise it's like you said...........unoticable
Now my 04 would react like a standard shift when downshifting through every gear and their was no lag like there is in the V..............I just adjust to it.

 

[mswaim]

The Corvettes with six speed autos (paddle shifters) get a "throttle blip" as they are down-shifted. Each time to select a lower gear, there is a split-second hesitation as the computer sneds a signal to kick the rpm's up a bit to better match the new gear choice. That way you drop into the lower gear with an rpm advantage, much like heel-to-toe braking/cornering. Too bad they didn't carry that over into the V.

 

[427]

Thanx for the info ... I appreciate it.