Tracker Trans

kingfish · 03-12-2007, 02:02 PM

I have a 95 Geo Tacker 4x4 with a 3-speed auto trans, I don't know the number for it. Is there a auto trans with an overdrive that can be installed for better gas mileage? I heard trackers didn't have over drive until 96, and it won't work with the coumputer in older models.

Shconer · 03-12-2007, 06:17 PM

I think they got the 4 speed in 1993. Im pretty sure you must use a automatic transmission PCM with an automatic nad it would be best to use the same year.

tracka96 · 03-12-2007, 08:37 PM

Is your torque converter lock-up kicking in at 47MPH? That's kinda sorta like an overdrive and does hurt gas mileage if it's not working. Tracka

kingfish · 03-13-2007, 12:37 PM

I don't if its locking up, there's no jurking or anything, how could I tell?

ON the shifter only has Park-Reverse-Nuetral-Drive-Second-First

tracka96 · 03-13-2007, 12:48 PM

After you drive a bit till your engine warms up, in 3rd gear, slowly speed up to about 50mph, at 47 mph the tach needle should drop quite a bit. On my 3 speed I can actually feel it to, kind of like another shift. Tracka

tracka96 · 03-13-2007, 02:38 PM

Just had my car out, on a level road at 54MPH, my tach is at 3000 RPM. If yours runs much above that, your converter isn't locking up. Tracka

kingfish · 03-13-2007, 08:20 PM

At 55 miles an hour my tach is around 4000 rpm. So the converter isn't locking up. How would I fix this then?, and is it suppose to do it in all 3-speeds?

tracka96 · 03-13-2007, 08:59 PM

It only locks up in 3rd after you hit 47 mph. on mine I had to replace the solenoid in the transmission, not to hard, when you drop the pan you can see the solenoid. It's called the torque converter clutch solenoid. There's a relay that controls it tho, and the control also goes thru the ecm. do some research on it here and see what you can learn. Tracka AutoZone.com | Repair Info | Vehicle Repair Guide | Select Year

tracka96 · 03-13-2007, 09:11 PM

Here's some general info I googled, if you do your repair, I think you'll have to get maybe a Chiltons manual or something. Tracka
The TCC:

The purpose of the Transmission Converter Clutch (TCC) feature is to eliminate the power loss of the torque converter stage when the vehicle is in a cruise mode. The TCC System uses a solenoid-operated valve to couple the engine flywheel to the output shaft of the transmission through the torque converter. Lockup reduces slippage in the converter increasing fuel economy. For the converter clutch to apply, two conditions must be met:

* Internal transmission fluid pressure must be correct.
* The ECM must complete a ground circuit to energize the TCC solenoid that moves a check ball in the fluid line. This allows the converter clutch to apply, when hydraulic pressure is correct.

The TCC is very similar to the clutch in a manual transmission. When engaged, it makes a direct physical connection between the engine and transmission. Generally the TCC will engage at about 50 mph and disengage at about 45 mph.
The TCC Solenoid:

The TCC solenoid is what actually causes the TCC to engage and disengage. When the TCC solenoid receives a signal from the ECM, it opens a passage in the valve body and hydraulic fluid applies the TCC. When the ECM signal stops, the solenoid closes the valve and pressure is vented causing the TCC to disengage. If the TCC fails to disengage when the vehicle comes to a stop, the engine will stall.
Testing The TCC:

Before attempting to diagnose converter clutch electrical problems, mechanical checks such as linkage adjustments and oil level should be performed and corrected as needed.