89 sidekick automatic trans slow to engage in reverse on first start of the day.

You do have a problem then. Slow reverse engagement can be the sign of a failing transmission. Use reverse as little as possible under as light a load as possible. If you have never changed the fluid and filter in the transmission do that as well, it may help. Also verify the fluid level is correct hot fluid check.

popsible imternal problem on the transmision posible have bad seal on the reverse piston and drom

THE SOLENOID PACK IN THE TRANS IS BAD

Change fluid and filter.add a bottle of lucas transmission oil also.

For Automatic transmission problem,Check the list of help links below.click the link below:----Automatic transmission troubleshooting:----

http://howtobyme.blogspot.com/2011/11/automatic-transmission-will-not-go-into.html

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Automatic transmission shift lever issues?-------

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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AUTOMATIC TRANSMISSION FLUID LEVEL? --

http://schematicsdiagram.blogspot.com/2011/07/how-to-check-automatic-transmission.html

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AUTOMATIC TRANSMISSION FLUID AND FILTER?

http://schematicsdiagram.blogspot.com/2011/07/how-to-change-automatic-transmission.html

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Transmission fault light on car dash?

http://schematicsdiagram.blogspot.com/2011/12/transmission-fault-light-on-car-dash.html

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Transmission shifting problem?

http://schematicsdiagram.blogspot.com/2012/01/transmission-shifting-problem-on-toyota.html

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Transmission Slips out of 2nd gear?

http://repairhelpcenter.blogspot.in/2012/02/transmission-slips-out-of-2nd-gear.html

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OD light flashing and transmission fluid leaking?

http://repairhelpcenter.blogspot.in/2012/02/od-light-flashing-and-transmission.html

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Why Transmission fluid leaks near radiator?

http://repairhelpcenter.blogspot.in/2012/02/transmission-fluid-leaks-near-radiator.html

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transmission fluid leaking?

http://technoanswers.blogspot.in/2012/02/ford-windstar-transmission-fluid.html

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****** wont go in reverse?

http://technoanswers.blogspot.in/2012/02/dodge-neon-wont-go-in-reverse.html

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Automatic transmission will not go into reverse?

http://technoanswers.blogspot.in/2012/02/dodge-automatic-transmission-will-not.html

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Transmission is making buzzing noise?

http://technoanswers.blogspot.in/2012/02/transmission-is-making-buzzing-noise.html

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This will help.

Thanks.

Definitely not good. The transmission is slipping internally due to worn gears and clutch packs. It will have to come out for rebuilding, IMO. Have a transmission shop check it out.
Good luck.

Ok , so you got home , parked it and when you started it up the next day and shifted it into reverse... backed out... and went to shift into drive , it stayed in reverse ?
Have you checked to see that the cable has not disjoined itself from the shifter to the trans.?
Are you able to engage Park?

sounds like filter could be clogged, if it hasn't been changed in a while. you can try to replace throttle position sencer, it is like your old trans kinkenge system, only now, it is elect. it tells trans when to shift, like your speed sencer on trans doe's. both can make it act like it is.

ther isn't anything anyone can do without driving this with a scanner hooked up to see if you have any codes and to see the data to see if anything is wrong.
This problem can be anything from a computer issue to a trans or engine issue. The problem will be internal to all the above mentioned. You could do a trans service and hope for the best but a diagnostic approach would be better

you need to replace clutch pack for that gear can be ordered seperately from parts store or dealer if you want to save money call peach street auto recycling at 1800-365-2341 for a warrantied used one! also might be time for change trans filter and fluid filter could be slightly clogged but I lean towards clutch pack I replace these alot on Hondas