Thread: No 1st, 3rd, or 4th...0742, 0756 Codes

I just wanted to give an update to those of you who have been following the thread or anyone that may run into this problem.

I have officially fixed my transmission. My initial problem was I did not have 1st, 3rd, or 4th gears. I threw 2 codes listed above, and checked the wiring regarding these codes. I also unplugged the main transmission connector.

My grounds were good and power was good. NO resistance in the wires and the shift solenoids tested okay.

Disconnecting the main tranny connector should have given me 3rd gear only, but I still only had 2nd. So I had to remove the side cover and take out the valve body. Here is what I found.

The 1-2 shift solenoid valve spring was missing. I found it in the 2-3 shift valve bore. It must have rolled to that location when I had the valve body apart cleaning it and doing the sonnax upgrades. So I put it all back together and got all my gears back. Went with the JXFM converter and works great.

However I did manage to crack the side cover somehow and had a terrible tranny leak. Got that fixed this weekend too.

Thanks DAVE for all your help!

Good to hear you got it fixed James! Those side covers are VERY touch and there is one location where the molded gasket doesnt have metal all the way round the hole the is very common to crack and I torque all of the surrounding bolts before hand to lessen the risk!

Originally Posted by Trannyman95

Good to hear you got it fixed James! Those side covers are VERY touch and there is one location where the molded gasket doesnt have metal all the way round the hole the is very common to crack and I torque all of the surrounding bolts before hand to lessen the risk!

Yep...that is exactly what happened. So I did just as you stated above.
Hand tightened all the bolts by hand first, made sure the gasket was lined up and then torqued them down.