2002 Ranger 4X4 - 4.0 - 1-2 shifts very hard, seems to be late and slam - changed fluid, old was OK, forward reverse OK - What do you think Doug

When is the last time you had the fluid changed? If by jump you mean it seems to shift late or hard you could have a problem with the solenoid packs. Does the computer throw any codes?

Sounds like something broke in the clutch area. The clutch has springs in it. In there for harsh shifts And dumping the clutch. But the pressure plate could possibly do this as it is also spring loaded. Changing the fluid would do this. The fluid only lubricates the internal parts. IE.. gears, bearings, ad synchronizers. being low isn't good, but still wouldn't cause this problem.

I say just change the part out..as ,long as its external it should b fine...Im pretty sure it is but I don't know everything bout trannys

Check vehicle speed sensor operation.

For Automatic transmission problem,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.

CODE 37 TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT. I WOULD DO ANOTHER TRANSMISSION FLUID CHANGE.BECAUSE THE LUCAS OIL COULD BE TOO THICK FOR TRANSMISSION. CAUSING HARD SHIFTING.CHANGE FLUID AGAIN SEE WHAT HAPPENS.

check fluid and if ok you have a pressure problem.
Check for trans codes, too

1. Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed. Easy fix in pan. Fix as soon as possible or hard parts will eventually break.
2. Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth electrical response. If the response is jumpy or erratic at all, replace TPS.
There are two thing that may be happening that you have described, but you can tell which one it will be since your driving the Blazer. Both are simple to repaire, but to change the EPC. Your going to have to drop the transmission pan so that's going to be a transmission shop and call around, the EPC can be replace the same time there draining the transmission fluid when servicing the transmission which is about $110.00 for fluid and filter replacement and additional $65.00-$80.00 for the EPC valve.
EPC (electronic pressure control) valve TPS (Throttle position sensor)
Thank you for using Fixya and good luck. If it's the EPC failure, replace as soon as possible. may casue the sunshell to fractured or splines to sheared off.

i had a 1994 saturn sl2 that did the same thing what you need to do is change the transmission filter and fluid and you should not have this problem any more if you can afford it go get the transmission flushed.

Check for trans codes then I would suggest a fluid change if there are no trouble codes, many times these kinds of problems are caused by a little piece of dirt causing a shift solenoid to stick.