4L60E New Reverse Problem
Thread Starter
Teching In
Joined: Jan 2019
Posts: 11
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From: San Marcos, TX
4L60E New Reverse Problem So I’m going to start out by saying that BEFORE I did any work to the trans, EVERYTHING was working perfectly and the trans was super strong.
Freshly Built 4L60e
So yesterday I pulled off the stock pan and VB to install a rossler trans brake and a deep pan. I swapped over all of the necessary parts to the new VB and did my best to ensure everything was placed correctly.
Since then, the car is slow to get into reverse. I can put it in reverse and it’ll take 5-10 seconds to respond if it even does. If I rev the engine just slightly, it’ll slam into reverse with the very positive engagement I’m used to feeling (car really jumps when going into R). On top of that, I feel like the trans *might* be slipping a little bit. That could just be my mind messing with me, but it’s possible. The 2-3 shift just doesn’t feel quite as positive as I remember.
To me it it sounds like a line pressure issue. I do not have a gauge, nor do I have a scanner to look at it. I called AAMCO (my friends works there) and asked if I could briefly borrow a line pressure gauge. They said “Why would we have a gauge for that?? Line pressure is line pressure!” So I guess I know why I’ll never take my trans to them, lol.
Anyway, does anyone have some thoughts on this? I’m confident the trans is fine and something about my install is amiss. On top of all of this, the trans brake is not responding at all. I’m going to pull the pan today to ensure it’s even responding, and if the solenoids work I’ll know it’s something else to do with this reverse issue.
Thoughts? And any ideas where I could find a scanner that will show me line pressure and allow me to command full pressure?
Freshly Built 4L60e
So yesterday I pulled off the stock pan and VB to install a rossler trans brake and a deep pan. I swapped over all of the necessary parts to the new VB and did my best to ensure everything was placed correctly.
Since then, the car is slow to get into reverse. I can put it in reverse and it’ll take 5-10 seconds to respond if it even does. If I rev the engine just slightly, it’ll slam into reverse with the very positive engagement I’m used to feeling (car really jumps when going into R). On top of that, I feel like the trans *might* be slipping a little bit. That could just be my mind messing with me, but it’s possible. The 2-3 shift just doesn’t feel quite as positive as I remember.
To me it it sounds like a line pressure issue. I do not have a gauge, nor do I have a scanner to look at it. I called AAMCO (my friends works there) and asked if I could briefly borrow a line pressure gauge. They said “Why would we have a gauge for that?? Line pressure is line pressure!” So I guess I know why I’ll never take my trans to them, lol.
Anyway, does anyone have some thoughts on this? I’m confident the trans is fine and something about my install is amiss. On top of all of this, the trans brake is not responding at all. I’m going to pull the pan today to ensure it’s even responding, and if the solenoids work I’ll know it’s something else to do with this reverse issue.
Thoughts? And any ideas where I could find a scanner that will show me line pressure and allow me to command full pressure?
Last edited by 02F-Body; Jan 18, 2019 at 09:56 AM.
Thread Starter
Teching In
Joined: Jan 2019
Posts: 11
Likes: 0
From: San Marcos, TX
The other thought I’m having is that it’s something to do with the pressure manifold switch. The trans brake sits between the VB and the PMS so I feel like that could directly affect it and create pressure issues for me.
Thread Starter
Teching In
Joined: Jan 2019
Posts: 11
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From: San Marcos, TX
Regardless the brake rake is not engaging anyway.
TECH Junkie
Joined: Jul 2015
Posts: 3,012
Likes: 48
With the car off, hit the tbrake button and see if you can hear the the solenoid engage. If it is, then you have other issues.
Thread Starter
Teching In
Joined: Jan 2019
Posts: 11
Likes: 0
From: San Marcos, TX
Fortunately the fluid looks good, so I don’t think I did any damage to the clutches.
