2003 XKR shifts too soon between 1st & 2nd gear

2003 XKR shifts too soon between 1st & 2nd gear

Author
Discussion

JagHead

Original Poster:

11 posts

230 months

Thursday 29th September 2005
quotequote all
I recently purchased a 2003 XKR. It has the ZF6HP26 6-speed automatic transmission. I love everything about the car except for one thing. When I take off from a stop the transmission will immediately shift to 2nd gear unless I really get into the gas pedal. This is aggravating because there is virtually no way to take off normally and then kick the throttle for that rush that you know the car can provide in 1st gear. Even if I floorboard it from a dead stop it shifts into 2nd at about 4500 rpm. If I take off from a stop to make a turn the transmission will always be in 2nd just when I want to punch it. The dealer tells me there is no throttle/transmission interface cable to adjust and that these functions are all controlled electronically. How can I remedy this situation? I cannot believe they all shift this way.

laurieb

72 posts

238 months

Thursday 29th September 2005
quotequote all
I am afraid it is a feature of that particular ZF box. The electronics are programmed to dump 1st gear asap after launch in order to prolong gearbox life. I dont think there is much you can do about it. Personally on my own modified S-type R I dont find it that much of a hindrance as on a "full bananas" launch (track days of course) I am struggling for traction in 1st on any surface so a short shift to 2nd is no bad thing.

Cheers,

Laurie

jas xjr

11,309 posts

246 months

Thursday 29th September 2005
quotequote all
it may be possible to "reprogram " the transmission by disconecting the battery for a short while. i know the transmission on my xjr " learns" how a particular driver drives.
got to be worth a try? make sure you give it some after reconnecting the battery!

john millar

93 posts

243 months

Friday 30th September 2005
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You could have a paddle shift fitted, and this should enable selection of first gear.

JagHead

Original Poster:

11 posts

230 months

Friday 30th September 2005
quotequote all
John: Is this a dealer upgrade or do I need to seek other sources?

jas xjr

11,309 posts

246 months

Friday 30th September 2005
quotequote all
i think racing green or racelogic may be able to help you