1993 Nissan Maxima 3.0 sohc Re4F02a transmission. Intermittently goes into limp mode at startup. Shut it off and start it back up and it is usually fine. Transmission diagnostics are 4,5,and 6. Shift solenoid valve a circuit. Shift solenoid valve b circuit. And timing solenoid valve circuit. I have talked to a shop and he seemed to think it was a ground. Checked all the grounds I can find and ran diagnostics from fsm for the three fault codes and all checks out. Have run a few other other diagnostics from fsm that check out as well. Definitely seems like and electronics issue, but I’m no tranny mechanic. Where do I go from here?

SOURCE: transmission

check for power at the tcm if no power check trans relay

SOURCE: Holden rodeo 99 3.2v6 4l30e code 82 and going into limp mode

the tcm may be faulty or has a loose ground, try swaping in another if you can get one borrowed or a cheap used one from a salvage unit

SOURCE: 97 caravan check engine light, transmission will not up shift from 1st.

The only reasonable part is the labor charge. I couldn't second-guess the shop's recommendation, maybe both parts are needed, but you could have them replace the shift solenoid, and try driving it for awhile, see what happens. Then if you need the TCM, try a used one from a salvager for less than half the cost of new. That is something you could install yourself.
Whatever you decide, good luck.

J.D. Browning

• 2760 Answers
• Posted on Jun 29, 2012

SOURCE: Shift problems with 4l80E.

try changing the fluid and filter in trans
work F to R with foot on brake several times with a little gas after new juice in trans to loosten things up again

they gum up from sitting too much over winters and stuff

SOURCE: Just had a rebuilt transmission installed in 2000 chevy 1500, 4 wheel drive, 5.3 eng., 4L60 ******.

I think the people that rebuilt it, will have to pull it back out