I have a 93 4l60e, the pump and valve body are hooped. I have a 96 pwm pump and valve body, the pump will swap right in, but the valve body needs the tcc valve and some kind of 3-2 mod. The question is can I use the 93 sol. on the 96 vb. and avoid the 3-2 cut loose by chip tuning the pwm 3-2 solenoid to be controlled like on/off style? If so, does anybody have any tuning tables for shift solenoids?
4L60E interchange and tuning questions
- Thread starter 1Ton_s-blazer
- Start date
That's why I'm going to change the calibration, I'm just not sure how far down the table to raise the dc. or just put it 90 or 95% across the board.
The solenoids operate inversed from each other as do their respective valves. Once you do figure out how to tune that table.....How many tie-ups and/or flares did you to put the Band & 3-4 clutch through?
Repairing/Diagnosing transmissions is difficult enough without using mismatched parts, I gave you an easy out with a link to a NOS reman?
What's exactly wrong with the '93 valve body you have?
Repairing/Diagnosing transmissions is difficult enough without using mismatched parts, I gave you an easy out with a link to a NOS reman?
What's exactly wrong with the '93 valve body you have?
It's fubar, every bore needs to be reamed. I can get a local core, but I have a 96 vb. in great shape, trying to be budget friendly when possible. Customs and brokerage charges have gone up so much that I'm up to a grand just soft parts, 3 solenoids and atf+6 (local).
Do you have any fluid flow circuit diagrams? I've only found one so far.
What does the 3-2 blocking do to the shift and control circuits? Is this similar to 09+ ?
Do you have any fluid flow circuit diagrams? I've only found one so far.
What does the 3-2 blocking do to the shift and control circuits? Is this similar to 09+ ?
I have a extensive library of fluid diagrams, But have to be posted in cells for clarity/detail.......
Thank you for the diagrams. If you have more to share as an attached folder, that would be much appreciated. They're not easy to find anymore.
Correct me if I'm wrong, it seems like the 3-2 control gives a softer downshift but doesn't help the 3-4 clutch life and the engineers didn't figure it out until 09.
What would be wrong with putting the 96 vb/plate with 3-2 control blocked inward, pwm 3-2 sol., 74741Q valve, and a dummy tcc sol. on a 93 case and leave the tune alone?
Correct me if I'm wrong, it seems like the 3-2 control gives a softer downshift but doesn't help the 3-4 clutch life and the engineers didn't figure it out until 09.
What would be wrong with putting the 96 vb/plate with 3-2 control blocked inward, pwm 3-2 sol., 74741Q valve, and a dummy tcc sol. on a 93 case and leave the tune alone?
What are the solutions for applying L/R in D3 or maybe D4 ?
Transbrake??
I don't remember if it' s a 700 only thing, to have the L/R apply in first no matter what range you're in.
I think you mean Overrun not Low/Reverse......https://www.sonnax.com/parts/2464-heavy-duty-2-3-shift-valve
I hope all you guys realize what a treasure it is to have a guy like this on the forum who's doing this stuff for a living but offering his time with the info for free.
On Ls1tech.com (a lot of TLDR lol), Frank claims to have a way to apply L/R in First in any range, but won't say how it's done.
He also has an Overrun cheat that is supposed to do the same as the Sonnax hd 2-3 valve. Plug 2 holes and cut gasket. see pic
After looking at fluid diagrams, I'm skeptical about a simple L/R mod being possible, but maybe adding a sol. and ckbl. in the Lo circuit is easy Lol. Makes me wonder about his other mods.
Cline, it's time to shine. "Does the defense's case hold water?"
He also has an Overrun cheat that is supposed to do the same as the Sonnax hd 2-3 valve. Plug 2 holes and cut gasket. see pic
After looking at fluid diagrams, I'm skeptical about a simple L/R mod being possible, but maybe adding a sol. and ckbl. in the Lo circuit is easy Lol. Makes me wonder about his other mods.
Cline, it's time to shine. "Does the defense's case hold water?"
I respectfully disagree. Not here to impress anyone! I'm no longer on LS1tech for a reason...Everyone can build a better 4L60E using all these whiz-bang hydraulic modifications.
I'm not here to piss anybody off. A little lite razzing never hurt anyone. I just want to find information and if I'm curious about it, I'll ask for other opinions. If you don't know, just ask, it's way less expensive in the long run.
I'm curious about a L/R mod instead of pulling it down to low every time. Any insight is appreciated.
I'm curious about a L/R mod instead of pulling it down to low every time. Any insight is appreciated.
I'm not familiar with having the L/R come on in any other forward range than L1, I'll give 2 reasons why it's a bad idea.....
*When coming to stop....The L/R will come on @ 3-4 MPH which would be irritating.
*If you ever lost the VSS signal to the PCM (More prone to happen with early VSS Buffer module systems), The unit will downshift to 1st no matter the vehicle speed.....The LAST thing you want is the L/R Clutch to come on at highway speeds.
If you like to manually shift out of L1 to L2, There are mods required to the L/R Clutch Stack to obtain a faster release to prevent distressing of the 2-4 Band & L/R Clutch. As this requires removing the L/R Clutch wave/cushion plate.....The auto downshift at 3-4 MPH will be 10x more irritating.
*When coming to stop....The L/R will come on @ 3-4 MPH which would be irritating.
*If you ever lost the VSS signal to the PCM (More prone to happen with early VSS Buffer module systems), The unit will downshift to 1st no matter the vehicle speed.....The LAST thing you want is the L/R Clutch to come on at highway speeds.
If you like to manually shift out of L1 to L2, There are mods required to the L/R Clutch Stack to obtain a faster release to prevent distressing of the 2-4 Band & L/R Clutch. As this requires removing the L/R Clutch wave/cushion plate.....The auto downshift at 3-4 MPH will be 10x more irritating.
My 2c, saving what, just get the proper vb installed.
They don't make a vb that functions like this, and apparently they shouldn't.
I didn't think about the downshifting issues, that overrun mod has downshifting issues too. I'm crossing those off my list, I just have to remember to put it down to L1 if I want to do something stupid, rare these days anyway, lol.
Does the Sonnax 2-3 valve cause any downshifting or engine braking issues?
I didn't think about the downshifting issues, that overrun mod has downshifting issues too. I'm crossing those off my list, I just have to remember to put it down to L1 if I want to do something stupid, rare these days anyway, lol.
Does the Sonnax 2-3 valve cause any downshifting or engine braking issues?
It can cause a 3-2 clunk, Like I stated.....Notching the 2nd Servo Cushion Spring Cover eliminates it. Fluid builds up behind the cover & can't exhaust quick enough rendering the cushion spring/s ineffective.
The Forward Sprag is much weaker than the Lo Roller Clutch.....If you we're concerned will pulling it down in low to support the Lo Roller Clutch, I beat the snot out of my 4L65E in D3 with drag radials (Am running a Sonnax HD shift valve)
The Forward Sprag is much weaker than the Lo Roller Clutch.....If you we're concerned will pulling it down in low to support the Lo Roller Clutch, I beat the snot out of my 4L65E in D3 with drag radials (Am running a Sonnax HD shift valve)
