4L60E, no 2nd or fourth
Thread Starter
Teching In
Joined: Feb 2006
Posts: 18
Likes: 0
From: Armada, Michigan
4L60E, no 2nd or fourth Hey everyone,
I'm having a problem with my 4L60E that I just got done rebuilding. Me and my buddy rebuilt a couple years ago, but the pump rotor let go. This last rebuild, we rebuilt the pump and tore the whole thing down for inspection.
Now, I do not have second or fourth gear now. It will go from first to third in (D). However, it appears now that it will hit second gear the first time I take off in the car, but that is the only time it ever hits second gear. After that, it will go from first to third.
I asked on another forum for some pointers and I was told my 2-4 servo/band could be the culprit?
Thanks!
Rob
I'm having a problem with my 4L60E that I just got done rebuilding. Me and my buddy rebuilt a couple years ago, but the pump rotor let go. This last rebuild, we rebuilt the pump and tore the whole thing down for inspection.
Now, I do not have second or fourth gear now. It will go from first to third in (D). However, it appears now that it will hit second gear the first time I take off in the car, but that is the only time it ever hits second gear. After that, it will go from first to third.
I asked on another forum for some pointers and I was told my 2-4 servo/band could be the culprit?
Thanks!
Rob
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Yes, the servo is a likely candidate and certainly the first thing I would check. There is the possibility of a problem with the band, but let's hope not.
First, remove the servo and carefully check the seals, especially on the 2nd apply (inner) piston. If that looks OK, you should check that that servo pin isn't too loose (too much free travel). The following directions for the Sonnax servo kit explain this:
http://www.sonnax.com/system/instruc...911-03K-IN.pdf
IMO, you don't need a dial indicator on it - anywhere between 1/16" and 1/8" should be fine. If it is indeed too loose, you will need to buy an extra-long servo pin and grind it down, as described in those directions. (You don't need the expensive Sonnax servo.)
Also, to help with a worn servo bore and leaking stock seals, Sonnax makes an o-ring kit (#77701-04SK) to better seal the 2nd apply piston:
http://www.sonnax.com/system/announcement/77701-04K.pdf
First, remove the servo and carefully check the seals, especially on the 2nd apply (inner) piston. If that looks OK, you should check that that servo pin isn't too loose (too much free travel). The following directions for the Sonnax servo kit explain this:
http://www.sonnax.com/system/instruc...911-03K-IN.pdf
IMO, you don't need a dial indicator on it - anywhere between 1/16" and 1/8" should be fine. If it is indeed too loose, you will need to buy an extra-long servo pin and grind it down, as described in those directions. (You don't need the expensive Sonnax servo.)
Also, to help with a worn servo bore and leaking stock seals, Sonnax makes an o-ring kit (#77701-04SK) to better seal the 2nd apply piston:
http://www.sonnax.com/system/announcement/77701-04K.pdf
Thread Starter
Teching In
Joined: Feb 2006
Posts: 18
Likes: 0
From: Armada, Michigan
Yes, the servo is a likely candidate and certainly the first thing I would check. There is the possibility of a problem with the band, but let's hope not.
First, remove the servo and carefully check the seals, especially on the 2nd apply (inner) piston. If that looks OK, you should check that that servo pin isn't too loose (too much free travel). The following directions for the Sonnax servo kit explain this:
http://www.sonnax.com/system/instruc...911-03K-IN.pdf
IMO, you don't need a dial indicator on it - anywhere between 1/16" and 1/8" should be fine. If it is indeed too loose, you will need to buy an extra-long servo pin and grind it down, as described in those directions. (You don't need the expensive Sonnax servo.)
Also, to help with a worn servo bore and leaking stock seals, Sonnax makes an o-ring kit (#77701-04SK) to better seal the 2nd apply piston:
http://www.sonnax.com/system/announcement/77701-04K.pdf
First, remove the servo and carefully check the seals, especially on the 2nd apply (inner) piston. If that looks OK, you should check that that servo pin isn't too loose (too much free travel). The following directions for the Sonnax servo kit explain this:
http://www.sonnax.com/system/instruc...911-03K-IN.pdf
IMO, you don't need a dial indicator on it - anywhere between 1/16" and 1/8" should be fine. If it is indeed too loose, you will need to buy an extra-long servo pin and grind it down, as described in those directions. (You don't need the expensive Sonnax servo.)
Also, to help with a worn servo bore and leaking stock seals, Sonnax makes an o-ring kit (#77701-04SK) to better seal the 2nd apply piston:
http://www.sonnax.com/system/announcement/77701-04K.pdf
Thanks for the advice! The servo will be the first thing I will check! I forgot to mention, my trans is not stock. The servo was upgraded with the first rebuild a few years back. Everything was working perfect until the 13 vane pump rotor broke in four pieces.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Perhaps a rotor fragment got into the servo and damaged something you didn't notice.
Have you ever checked line pressure with a gauge?
Thread Starter
Teching In
Joined: Feb 2006
Posts: 18
Likes: 0
From: Armada, Michigan
I have not checked line pressure with a gauge.
Thread Starter
Teching In
Joined: Feb 2006
Posts: 18
Likes: 0
From: Armada, Michigan
Well, I have some updated information. It appears I only have second and third, no first or fourth gear. The weird part is that when I first take off when the car is parked (not running, in park), I will hit 1st, 2nd and 3rd gear. After I stop at a stop sign, it will take off in second and hit third. I will never see first until I park the car.
I finally got my laptop to work right and I got a code 84, 3-2 downshift feedback fault. I was leaning towards Solenoid A, since I only have 2 and 3rd gear.
I finally got my laptop to work right and I got a code 84, 3-2 downshift feedback fault. I was leaning towards Solenoid A, since I only have 2 and 3rd gear.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
If your budget allows $40, I would replace the two shift solenoids (you are correct that it is probably just A) and the 3-2 downshift solenoid.
If might just be the 3-2 downshift solenoid, but unless you really don't mind dropping the pan over and over again, replacing all three gives you a good chance it will fix the problem and you won't have other solenoid problems for a long time.
If might just be the 3-2 downshift solenoid, but unless you really don't mind dropping the pan over and over again, replacing all three gives you a good chance it will fix the problem and you won't have other solenoid problems for a long time.
Trending Topics
Thread Starter
Teching In
Joined: Feb 2006
Posts: 18
Likes: 0
From: Armada, Michigan
If your budget allows $40, I would replace the two shift solenoids (you are correct that it is probably just A) and the 3-2 downshift solenoid.
If might just be the 3-2 downshift solenoid, but unless you really don't mind dropping the pan over and over again, replacing all three gives you a good chance it will fix the problem and you won't have other solenoid problems for a long time.
If might just be the 3-2 downshift solenoid, but unless you really don't mind dropping the pan over and over again, replacing all three gives you a good chance it will fix the problem and you won't have other solenoid problems for a long time.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
