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Based on the symptoms you described, it is possible that the issue is related to the valve body of the transmission. The valve body is responsible for controlling the flow of hydraulic fluid through the transmission and is made up of various valves and solenoids that regulate pressure and flow.
When the winter drive is engaged, the transmission may be bypassing the valve body and locking into third gear directly, which would explain why it starts in third gear when winter drive is engaged. However, the hard shift from 2nd to 3rd and the inability to shift into 3rd without winter drive suggest a problem with the valve body.
It's also possible that there could be a problem with the transmission control module (TCM) or the wiring and electrical connections between the TCM and the transmission. A diagnostic scan tool can help identify any error codes or other issues related to the TCM.
Given that you have already replaced the 2nd to 3rd shift solenoid without any improvement, it may be best to have the transmission inspected by a professional mechanic or transmission specialist who can perform a more thorough diagnosis and determine the exact cause of the problem. They may also recommend a rebuild or replacement of the transmission if the issue is more serious.
May 8, 2004 - 19 posts - 9 authors
Auto Trans not shifting correctly from 2nd to 3rd Under the Hood. ... Become an EliteExplorer. Lithuania. 1999 5.0. Join Date: Jun 2003. Posts: 107 ... When this happens, the transmission will skip to the next gear like you said.
? 3:59
https://www.youtube.com/watch?v=aAoiL4vR8Qw
Jan 13, 2013 - Uploaded by James Burns
... Doctor, explores the causes of harsh shifting in automatic transmissions. ... Early diagnosis is important to ...
Sounds like your transmission is in limp mode. This is a fault mode in which the
transmission either loses electrical power or the PCM deactivates all of
the electronics. The transmission will default to max line pressure.
The driver will have Reverse and 3rd, with manual 2nd available by
putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC
lockup will not be available. It will not hurt the car to drive it like
this for short periods, but use manual 2nd to get the car moving, and be
aware that the trans will generate more heat than normal while
operating in limp-home mode due to increased torque converter slippage
during 2nd gear starts and no lockup in 3rd gear.
The other from what you described, trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
Thank you for using fixya and have your Safari scanned for the DTC codes that would indicate what issues your transmission is having to put you in to limp mode.
Auto transmission fluid needs changing; this is an area that gets neglected by a lot of people;check the fluid and if its brown or gives off a burning smell, it needs changing. Very old transmission fluid will cause slipping in the transmission; if this is the case, it should be changed along with the filter
Hope you find that this answers your question. Best of luck. Greg
p.s. If you have the fluid changed, make sure it's done from the tranmission pan, not through the filler tube; siphoning through the filler tube can be hazardous to the transmission, especially cars with a lot of miles
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
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