I have a 86 305 TPI 700R IROC

I have a SCAN Tool that I have hooked up to try to figure out the problem and this is what happens when appling a slow thottle


Shifter in:
1st Gear TCC will kick on at about 2400 RPM and 14MPH

2nd Gear once the trans shifts to second and the engine rpm hit about 1600 and about 22 MPH the TCC locks and there is a very big chug like letting of the throttle just after shifting a manual
trans at low rpm

3rd gear I feel the chug after the 1-2 shift and the 2-3 shift


This of cousre felt worse before I replace a bad trans mount

a l so the SCAN tool all the time with the key on say the 3RD gear switch is on. The trans is a type six from looking at the service manual Green selinod and two wires.

Other observasions are the speedo jumps a little at low speeds like between 0-40 jumping 1-2 mph

I am not sure what to hunt down VSS or should I be worried about the 3rd gear indicator give it locks up in first gear?

 

Type 6? Just a solenoid, no switches? You should have a Type 4. You're missing the fourth gear switch on pin B, which grounds when the transmission is in 4th gear and is open otherwise. Since your pin B is always open, the ECM is probably assuming you're always in O/D and is keeping the TCC locked up.

 

Correct there is only a wire to a green selenoid. I know very little about about the trans but with the pan off it matched type 6 and the scantool said that it the 3rd gear indicator was on . I assume I need a different valve body to add a switch and wire back to the B pin? If I run a wire to the B pin through a switch to just frame ground and flip the switch to ground when the car reaches 4th that shoudl veify I have nothing else wrong? I just bought the car and have little to no history on it other than it had yellow tire marker on the bottem of the pan like a junk yard would mark part with. Thanks

 

You could try that, sure.

To bring your wiring closer to what it should be, you can insert an 8634475 or 8642569 switch into the position shown on the diagram and wire the single terminal to the B pin. You'll still be missing the 4-3 pulse switch, which unlocks the TCC during a downshift from 4th to 3rd. This might make your downshifts a little harsh. If you like you can put a 8642346 switch between pin A and the solenoid lead as shown in the diagram to take care of this.

<img src="http://www3.telus.net/~crussel/tcc_wiring.gif" width=100%>

 

I just read that again, you have a single green wire? That's a type 12, used on non-CCC carbureted cars with Canadian emissions. If that's the case, the ECM has no control over the TCC at all, it will be locked up all the time except when the brakes are applied. You'll need to change your solenoid to get ECM control. The P/N for the 2 wire solenoid is 8654129.

 

I double checked I do have a type 6 (two wire) so I plan to try to add the switchs.

Question do I need to change my selinoid? (From DK green to Red)

 

The one you have should be fine.