Converting a TH350 to non lock up

[J Knight]

Calling HR

Can a TH350 lock up tranny be converted to a non-lockup? Whats involved?

 

[crazy4offroad]

Torque converter, input shaft, valve body.

 

[J Knight]

Torque converter, input shaft, valve body.

The first two make sence but Im surprised the valve body is different.

 

[crazy4offroad]

We really need HR on this, I know the -C VB has a couple switches on it the non-C doesn't, so I'm not 100% sure a non-C VB will be a direct swap onto a -C trans. Also, I'm not sure if just unplugging the lockup wire will render the trans to a state that's practically non-C by all intents and purposes. But I do know those 3 things are hardware-specific differences between the 2 transmissions.

 

[Driver4r]

I was told that the valve bodies are different, and possibly the cases. I know a non-lock shift kit wont fit a trans with lock.

 

[MrMarty51]

 

[T-ROD]

The cases are different, the valve body would have to be considering the fluids gotta be controled to the torque converter somehow, and of coarse the torque converter itself is different, the cas just has the plug like the 700R4 does, the same actually, and id say its probably got a few different fluid passages in it also, id just get a th350 case, im actually trying to find a th350-c right now, andd I have a th350 case, it needs a few parts though,

 

[bigcountryguy19]

Why do you want to disable the lockup? IMO it would be nice to have it.

 

[crazy4offroad]

Why do you want to disable the lockup? IMO it would be nice to have it.

Racing.

Now that I think about it, I used a -C case and non-C VB, input shaft and TC to convert one to non-C. Damn man I'm slippin. The non-C case I had was pretty ****** up. Main thing you have to watch is your clutch count/thickness of your 1st/reverse pack and your forwards and directs.

 

[bigcountryguy19]

Racing.

Now that I think about it, I used a -C case and non-C VB, input shaft and TC to convert one to non-C. Damn man I'm slippin. The non-C case I had was pretty ****** up. Main thing you have to watch is your clutch count/thickness of your 1st/reverse pack and your forwards and directs.

ok gotcha. sorry seen this smiley and just had to use it lol

 

[J Knight]

Its seems to be easier to just find a non-lockup case.