whats wrong with my tranny?

Question

i have a 93 mazda b 2500 and it acts like to torque converter is kicking in and out occasionally.?
4 speed overdrive automatic

Additional Details

1 week ago
well im almost sure its unlocking ,it only does it on the free way and not all the time. Seems like it just does it occasionally when i dont want it to. Rarly does it happen in town at low speeds. The fluid is full and the tranny was rebuilt about a year ago. It also shifts hard into first under throttle the other gears shift smooth. Also it seems to lack power,almost like something is holding it back. Not slipping but as if it were in second when i take off.A friend of mine has a dodge truck that does the same thing at about 65 mph, and he said it does it most of the time but once in a while it dosent. I am tottally lost. I been working on cars for a few years and have encountered most problems and done alot of above average/shade tree work but have never seen a vehicle do this...

1 week ago
what it does to a tee,ill get on the gas and it will like kick into a passing gear like and go back and forth till i let off the gas,kinda like a slip but not a slip,like it cant make up its mind

Answer 1

shift down cable may need to be adjusted bring it back to the tranny shop they may cover it

Answer 2

You had better check the fluid level in that transission pretty darn quick! It sound's to me like everything is working as it should except it is not developing enough hydraulic pressure to keep the trans working properly. An automatic transmission is one big hydraulic system and hydraulic fluid is like your body's blood. Without enough blood, you don't work very well either.

It's either that or the hydraulic pump is failing to produce enough pressure to work right. A transmission shop can test the pressure of the system and perform a variety of other tests to pinpoint what the problem is. Depending on how many miles are on the transmission, the shop will probably recommend a complete overhaul which is the right thing to do for high mileage auto transmissions.

Check your owner's manual for specific instructions on how to check your trans fluid level correctly. Generally, you put the car on level ground, leave it running, cycle the shifter through the various selections to allow the fluid to be circulated fully throughout the transmission, and then put the selector in neutral and check the level on the dip stick. Add trans oil as needed, right into the dip stick hole. I'll bet yours is low.

The longer you go with low fluid level or a failing pump, the more wear will occur to your trans clutch packs and bands... all leading to a major overhaul.

Answer 3

I have a friend that has a 05 Dodge Cummins. It had a similar problem, the trans. would always leap into 2nd gear. The dealer said it was a characteristic of the truck. When other owners of the same model truck with the same problem were asked, they got the same answer.
We put a product called Ethos Fuel Reformulator in the trans. and this characteristic went away! It seems the trans. was not getting enough lubrication to the bearing. This product worked! It hasn't missed yet! It even gets better fuel mileage.
Its worth checking out.

Answer 4

Well, based on your information and having had a rebuild (not a used unit) 1year ago. I'd have a diagnostics check done. Remember,....these newer trannys don't shift on vacume anymore like in the old days. They now recieve a shift signal from the computor which sends an impulse to shift sensors in the tranny. You have a wet harness in that tranny and several electronic shift sensors which now control the shifting. It is not uncommon for one or more of these to blow out or screw up. Depending on the type of mazda tranny, most (but not all) of the sensors are accessable upon removing the pan. I would not recomend doing this yourself. Take it to a reputable tranny shop or back to the shop which did the rebuild and have them put a scanner on it and check the sensors.
GOOD LUCK!

Answer 5

what it,s doing is trying to lock up the converter,,this is a feature that was designed to save gas and make engine,s last longer,,but very often they start doing like your,s is,,what it need,s is the fluid changed,,and a new filter put in the tran,s,,and you may also need a new lock up switch,,don't worry these are not that expensive,,your best bet is to take it to a transmission shop,,and let them do it,,they have all the necessary tool,s there,,and also they can check it good after they repair it,,i hope this help,s.you may also want to have the valve body checked out,,it shouldn,t shift that hard,,if it,s only been built for a year.

Answer 6

wow, thats a bunch of problems. you gotta watch these trans shops, they can be sneaky. some scam by washing and painting the trans and just changing the changing the fluid, then adding an additive to thicken the oil. did u get the converter changed when they "rebuilt" the trans? to me, it sounds like the converter is gone, your accumulators are sticking, and your valvebody is gummed up, along with your shift solenoids. you might have to have the clutch packs and/or bands changed on it too.

Answer 7

I would take it back to the person who rebuilt it and have him check it out. It doesn't sound good and if you continue to drive it as is, you will only make it worse. Which means more expensive to fix.