08-07-2005, 07:45 PM
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#1
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AF Newbie
Join Date: Aug 2005
Location: Ruston, Louisiana
Posts: 2
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99 Tahoe Shifting Problem
Our 99 Tahoe has been working flawlessly, but today on the interstate, it started shifting hard, stopped going into OD, then when we got it home, it will not go into reverse!!
Checked all the fuses, nothing, read about a Sunshell problem, but it seems to be electrical, any ideas?
Thanks
Lt. Tim 
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08-08-2005, 03:08 AM
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#2
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AF Regular
Join Date: Feb 2005
Location: Houston, Texas
Posts: 54
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Re: 99 Tahoe Shifting Problem
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Originally Posted by Lt. Tim
Our 99 Tahoe has been working flawlessly, but today on the interstate, it started shifting hard, stopped going into OD, then when we got it home, it will not go into reverse!!
Checked all the fuses, nothing, read about a Sunshell problem, but it seems to be electrical, any ideas?
Thanks
Lt. Tim |
Not too sure about reverse problem, but check this thread,,,
http://www.automotiveforums.com/vbul...d.php?t=441197
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08-17-2005, 10:39 AM
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#3
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AF Newbie
Join Date: Sep 2004
Location: Mansfield, Ohio
Posts: 7
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Re: 99 Tahoe Shifting Problem
Your transmission valve body needs replaced. Just had my done to solve a hard shifting from 1 to 2 after the tranny would warm up. Total cost was $315
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08-17-2005, 10:42 AM
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#4
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AF Regular
Join Date: Feb 2005
Location: Houston, Texas
Posts: 54
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Re: Re: 99 Tahoe Shifting Problem
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Originally Posted by hiramabbif
Your transmission valve body needs replaced. Just had my done to solve a hard shifting from 1 to 2 after the tranny would warm up. Total cost was $315
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Say... did your check engine light turn off? Or was it even on in the first place?
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08-17-2005, 10:50 AM
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#5
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AF Newbie
Join Date: Sep 2004
Location: Mansfield, Ohio
Posts: 7
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Re: 99 Tahoe Shifting Problem
Had 2 occasions that the check engine light came on. Both times code was P1870. Transmission control slippage. Had repair done 3 weeks ago. No more lights and no hard shifting.
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08-17-2005, 10:52 AM
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#6
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AF Regular
Join Date: Feb 2005
Location: Houston, Texas
Posts: 54
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Re: 99 Tahoe Shifting Problem
very cool, thanks for the info.
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08-18-2005, 07:02 AM
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#7
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AF Newbie
Join Date: Nov 2004
Location: albuquerque, New Mexico
Posts: 44
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Re: Re: 99 Tahoe Shifting Problem
I had the same problem except for not being able to put into reverse. It had a few hard shifts 6 months ago but it was getting worse. Of course it got really bad on vacation. When it got hot, second gear would hit extremely hard, and a little hard in third. Took it to the tranny shop and $2,700 later I was back on the reoad. They supposodly found a bad tourqe converter along with a bad sun gear.
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08-18-2005, 08:17 AM
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#8
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AF Newbie
Join Date: Aug 2005
Location: Ruston, Louisiana
Posts: 2
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Well it was the Sunshell housing, and total cost was $1800+ to fix it. However, the dealership that we bought it from, took care of all of it!! 
They took care of some other small worn parts and seals, and bottom line, it shifts smooth as silk now. We really love the way it drives. Thanks for all the input.
Lt. Tim
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