need some year related info

[TylerZ281500]

okay so per my research 93-94 4l60es are different than 95-98+ years. im told its because of a different connector, if thats true im unsure. question is i have a lead on a few astro s10 transmissions, but what years would work? im gonna be rebuilding it and upgrading it anyhow but id still like to know. my trans is dying slowly, looking to get and engine and trans together so when that time comes im not out of luck.

 

[98_k1500]

I have seen so much controversy over this topic, I don't think anyone really knows for sure. If we had some solid facts about this, maybe we could put together a list of what works and what don't.

 

[polar]

From what I have seen 93-94 are the same, 95 is by itself, and 96+ are the same


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[sewlow]

'95 is the red-headed step-child of GMT400's when it come to transmissions & computer related stuff. It's the OBD 1.5 thing.

 

[TylerZ281500]

thats all i really know about them so far and thats just our generation truck transmissions for both 2wd and 4wd i havent the slightest clue if the astros/s10s and all those follow suit with the whole tbi/vortec year transmissions and i cant find any supporting info on it.

 

[97 Centurion]

My understanding is the 1997 4l60e is year specific. Atleast that is what I was told when ordering a replacement transmission last year.

 

[polar]

Nope 97 is not a year specific trans


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[cjman250]

I thought 95 and 98 were year specific

 

[polar]

I didn't run into anything year specific on mine and it's a 98. Possibly the only thing is the connector


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[98_k1500]

Its the PWM torque converter that is the biggest difference between them. I think (don't hate me if im wrong) a 95 trans can be used in 96+ trucks if you have the right transmission mounted neutral safety switch. I know the internals are the same, but if you have a PWM trans, you have to go back with a PWM trans, or have that tuned out of the computer. I am pretty sure they all can be converted to fit any year, but im not sure what all is involved. The guts are the same, I think any of them can be made to work if you know what you are doing, but i just don't know enough about it to tell you any specifics.