Transmission Problems - 4L60E

[RexNfx400]

Originally Posted by danielcwebb

I've got some additional info, I don't know if it helps or makes a difference, but here it is. The scanner captured freeze frame data as follows: 1870; 61 mph; 2100 (this is estimate as I don't have the tool in front of me and I can't remember exact number); throttle 31%. Does help diagnose the problem?

The freeze frame is usually lacking a lot of info Depending on model of car.

The thing to do is... Verify TCC RPM slip data in 4th gear and then in 3rd gear. While monitoring live data on scanner while driving. This way, the 2/4 band is at least taken out of the picture. If you have same TCC slip while in 3rd gear, then band ok. Its very rare the band slips, but it can happen. Your most likely just need to do the Transgo kit and be all good

[danielcwebb]

Originally Posted by RexNfx400

The freeze frame is usually lacking a lot of info Depending on model of car.

The thing to do is... Verify TCC RPM slip data in 4th gear and then in 3rd gear. While monitoring live data on scanner while driving. This way, the 2/4 band is at least taken out of the picture. If you have same TCC slip while in 3rd gear, then band ok. Its very rare the band slips, but it can happen. Your most likely just need to do the Transgo kit and be all good

How do I check the TCC slip? I am not familiar with this procedure. If this is from the scanner, I don't think mine has this option. I looked at the TransGo kit you recommended. It states very clearly that the tools are not included. Do I need a reamer for this? I had looked around and they were around $140 just for the tool.

I looked around on ebay and found this...

http://cgi.ebay.com/ebaymotors/ws/eB...135565243&rd=1

I know it's more expensive than the TransGo kit, but it says it includes the Sonnax upgrade. I don't mind spending a little more money if there's less chance of me completely ruining my transmission.

I've rebuilt a couple of manual trannies with no problem. I'm pretty handy, and know my way around a car pretty well, but automatics just scare the crap out of me.

[RexNfx400]

You need no special tools for the Transgo kit, part # SK® 4L60E, everything is included. Just depends how confident you are with following instructions,

The easiest thing-->The valvebody on auction. Though, myself don't really know the stadards of this company. You would be amazed at what some of the "mass marketing crappy tranny places" can put out for products. I personaly, can't say on this one.

Valvebody express. Now, that is a good valvbody rebuilder



Oh, and yes, your scanner needs to be able to monitor live data. If theres no option on the menu for it, then probably can't do it.

[danielcwebb]

OK, now I'm just trying to decide what to buy. From what I've read on this forum and others, the P1870 is usually triggered by problems with the TCC valve or the PWM solenoid. Correct me if I'm wrong, but the Superior kit (K4L60E-L) takes care of the problem with the PWM. The TransGo kit seems to only fix the worn valve body for the TCC.

Is there any way to figure out which is the problem, or should I just replace both. This seemed very simple at first, but depending on who I talk to, I am either told to use the Superior kit or the TransGo kit. Should I do both? They seem to address two different problems that could be causing the P1870 code.

Rex- I'm sure I can fix it as long as I order the right thing. I'm not worried about doing the job right, I'm worried about getting the right parts.

[RexNfx400]

First thing- Do not try to mix and blend different shift kits/valvebody kits. Unless you have an R-N-D budget and understand hydraulics completly

Just use the SK4L60E kit from Transgo. Its simple and gets the job done. I've used this for many years. Though, I'm fairly partial to Transgo. But use many Superior parts also, sometimes, Superior can lack good instructions.

They both make the PWM system to on/off TCC. And both address some minor "engineering oversights"

[spine]

1999 GMC Safari Van 164k No reverse/No overdrive. will go into the other gears, I have to accelerate then let off the gas then it will shift OK. Could it be anything other then a bad sun gear ?

[MT-2500]

Originally Posted by spine

1999 GMC Safari Van 164k No reverse/No overdrive. will go into the other gears, I have to accelerate then let off the gas then it will shift OK. Could it be anything other then a bad sun gear ?

Welcome to AF on your first post
To get you started out on the right track.

The post you have posted to is old and should be dead.
Always check the date on post before posting to a old one.
Also with a new problem like on yours always look for the NEW THREAD BUTTON AND START A New thread on your problem and some one will help you.

In your new thread give all info engine transmission and mileage and service history and codes.