Series 2 Auto gearbox hardshifting

Technical advice Q&A

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Bernie2015
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#1 Series 2 Auto gearbox hardshifting

Post by Bernie2015 » Thu Jan 05, 2017 1:32 pm

Does anyone have advice on what to do about a hard shifting auto gearbox, it's on a Series 2 2+2 1969. I have changed the oil and am looking for other possible reasons before taking it in for a full gearbox overhaul.
Bernie 1966 S1 OTS

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PeterCrespin
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#2 Re: Series 2 Auto gearbox hardshifting

Post by PeterCrespin » Thu Jan 05, 2017 4:10 pm

Bernie2015 wrote:Does anyone have advice on what to do about a hard shifting auto gearbox...
Yup. Fit a cheap Jag manual, preferably XJ6 overdrive.
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas

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christopher storey
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#3 Re: Series 2 Auto gearbox hardshifting

Post by christopher storey » Thu Jan 05, 2017 6:24 pm

The most frequent cause of this is maladjustment of the kickdown cable, usually in the shape of its being overshortened rather than too long . First thing I would do would be to lengthen the inner and see whether that improves things. In the workshop manual ( in the database here ) the auto trans section ( FF from memory ) provides a lot of good diagnostic information

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alfred
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#4 Re: Series 2 Auto gearbox hardshifting

Post by alfred » Fri Jan 06, 2017 2:10 pm

Before giving up, try find a good tranny shop, they can do a service on it...adjusting the bands, kick down adjustment, and other tests and let you know where you stand. Did you put the proper tranny oil in? Doing a rebuild on the auto requires removing it but I'm pretty sure it require the engine to come out as well.

I'm still running that same slush box since someone who said he had all the XJ6 parts to switch to a manual box never got back to me. :shrug:
1968 2+2

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Bernie2015
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#5 Re: Series 2 Auto gearbox hardshifting

Post by Bernie2015 » Sat Jan 07, 2017 10:35 am

Thanks for the advice much appreciated
Bernie 1966 S1 OTS

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PeterCrespin
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#6 Re: Series 2 Auto gearbox hardshifting

Post by PeterCrespin » Sun Jan 08, 2017 8:48 am

alfred wrote: I'm still running that same slush box since someone who said he had all the XJ6 parts to switch to a manual box never got back to me. :shrug:
Apologies assuming it's me. I've got four people after various transmissions, collect or ship but am not at home. Will be back in US next week. Have been with family nearly non-stop, either here in US since November. So please email me to my normal address of pc at thewritersbureau dot com

Pete
1E75339 UberLynx D-Type; 1R27190 70 FHC; 1E78478; 2001 Vanden Plas

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