I know, another transmission thread…

It seemed my torque converter was pulsing or surging. I know this is a known problem. I’ve tried to find someone around me to do a TCM reflash/update, but nobody wants to touch it due to age.
I bought a rebuild valve body with upgraded TCC circuit and new seals, pan, fluid etc.

I installed it last night. Reset adaptations. Aaaand…. it’s WORSE. Way worse. It won’t learn the 3-4 shift, so it just slips and slams 4th. Sometimes it just goes to limp mode. I’ve followed re-learn procedures, but it’s not working. It didn’t do this before.

And it now has the 1st gear lurch that everyone complains about.

I’m leaning towards a bad solenoid or maybe the bridge seal that I replaced being bad?. Or a combination of issues.

Any ideas?

 

You need to drive the car with light throttle for about 10 to 20 miles for to relearn how to shift don’t flour it. just drive easy for 10 to 20 miles and you’ll see the shifts will clear up

 

e clutch doesnt go through any of the seals

keep driving it around. if it never relearns the 3-4 shift your transmission is smoked

 

Could he sugar it?

Maybe baking powder it?

 

What’s bothering me is that it didn’t have a 3-4 shift issue before I put the new valve body in it. I wonder if one of the new solenoids is actually bad. It didn’t have any shifting issues or codes before I “fixed” it… perhaps I’ll put my old solenoids in the new valve body. Just sucks that I have to spend another $125 on fluid.

 

it needs to learn this is normal

never ever buy lifeguard6 for any reason, mercon sp is the same exact thing

 

The massive slippage from 3-4 is normal? If so, that’s makes me feel better. I drove it about 20 miles last night and it didn’t really improve much. 1-2, 2-3, 4-5, and 5-6 seemed to get better, but 3-4 was a mess.

 

You tried to find someone to reset adaptations but YOU reset adaptations??? (HOW?)
You cannot reset adaptations without a diagnostic devise to communicate with the modules.

You replaced a TCM (mechatronics) without regard to the VID block and now 'might' have corrupted your car's VID block?

You need to STOP 'throwing parts at your car' and deal with the network that is part of your car.

Please understand the interaction between modules and read the TSBs before installing replacement modules.

 

Thank you for the information.

I didn’t replace the mechatronic unit, just the valve body and solenoids. No electronics were swapped out.

As for how I reset the adaptations, I have a Launch scan tool at the body shop I work for. I’ve been trying to find someone to update the software in the TCM.

Thank you for the help and information.

 

Resetting the adaptations the correct way, via the factory diagnostics, is a two man job that required a driver and a tech running the SDD/IDS following a specific set of conditions which include vehicle speed and road topography.

 

you can make it learn without the ids guide

it will just take a while

 

The valve body IS THE MECHATRONICS!!!!!!!!!!!(Mechanical Electronics)
The upper part with the plug is the TCM with the lower part containing some valves also.

 

Understood. Per your last statement, you were concerned with coding issues. No electronics have been changed out. The TCM has not been changed, just the valve body.

 

tcm splits from the valve body on the bench

it wouldn’t have started with a mismatch

 

I suspect each is marginally different in situ and that is what the TCM needs to learn (thus, "adapt").

 

Thank you. I’m concerned that maybe one of the solenoids is bad because it’s just the 3-4 shift that’s doing it. But I’ll keep doing the drive cycles at night when traffic allows and see if it improves.

 

Sorry to hear your problems and I am sure you checked it but are you sure the fluid level is correct?
.
.
.

 

Thank you.
I did.

 

I found a relearn procedure on a Land Rover forum. I followed it exactly and it solved the 3-4 shift flare. There is also a procedure that helped with the 2-1 lurch when coming to a stop.

Thank you all for your help.

Brian

 

Groovy! Glad to hear the problem has been resolved. To help the next guy, can you please post a link to this procedure?