Transmission Code 87

[Gunar]

Hello Friends,

I have now a long time searched in the i-net and read, but I still don't understand it.

I have the DTC 87 - transmission gear ratio error

Can anyone explain please just that i understand what exactly does this mean?

My transmission shift good, but I have this code.

What exactly is the problem and how can i eliminate this?

Thank you in advance...

Gunar

 

[THEFERMANATOR]

Code 87 means that it is sensing a slippage in the trans in 3rd or 4th according to my alldata. It could be an internal trans issue, bad VSSB, bad speed sensor, or wiring issue. You really need a scan tool to see what the PCM is seeing to narrow it down.

 

[Gunar]

Hello,

Thanks to Florida!

Scan tool...which one you could recommend me?

Thank you...!

Gunar

 

[THEFERMANATOR]

http://www.enghmotors.com/tech/

This is a PC based program you run on a laptop to scan the truck. For the OBD1(94-95 6.5's), you have to use a GM TECH 1, GM TECH 2, or this program to set injection pump timing. And if your going to buy something to scan your truck, you might as well buy a tool capable of doing everything.

 

[Gunar]

Thank you,

from this program, I have read several times and was also on the Web page...

And this program shows me exactly which part is the error ?


Gunar

 

[NVW]

Gunar, these are two screen shots of what GMCTD tells you of transmission controls.

 

[Gunar]

Hi Leo,

Thank you...

I'm going to buy me such a Scantool and then I will see what it is...

I must take a translation program for some special words and then with you or Google try to explore...:thumbsup:

Thanks again...

Gunar

 

[NVW]

Gunar, you may want to email Stefan Engh before you buy, the program may be available in your language.

 

[rlb]

What's the cheapest/best scan tool for my truck (5.7)?

 

[NVW]

Paper clip http://www.thetruckstop.us/forum/showthread.php?589-6-5-Diesel-Technical-Library&p=111592#post111592