Transmission swap

[Cherryred98]

I have a 98 k1500, and the transmission just started slipping and not wanting to shift in its own so I pulled a transmission and transfer case from my uncles truck he is parting out. That truck is a 1994 k1500 z71, here is my delema, my 4l60e is the later model with the removable bell housing, the donor 4l60e is not, it’s almost like a th350 or something. I believe the bell housing and torque converter bolt up if not I probably can change the flex plate, but what about wiring? Will it all just plug in? Or is it different? On another note he started removing it before I got to it and he kinda messed up the plug, I don’t know if it is missing pins, a couple are bent I think I can straighten them out

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[Deancr11]

I'd change the in case harness out so the pin out was right fluid and filter since I'm there and go from that

 

[Deancr11]

Oh and by the way if that plug goes to leaking fluid it will fry that tranny another reason to change it

 

[Cherryred98]

I’m no transmission tech, what all does that consist of? Drop the pan, unplug the harness and swap it? Or do I have to remove the valve body and stuff

 

[Cherryred98]

I just watched a YouTube video on it

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I’m just hoping that they are the same internally

 

[l1lartur0]

The '98 valve body is different to a '94. Would that be an issue? Can the '98 valve body fit into a '94?

 

[NickTransmissions]

The '98 valve body is different to a '94. Would that be an issue? Can the '98 valve body fit into a '94?

No. Find a 93-94 valve body.

I just watched a YouTube video on it

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I’m just hoping that they are the same internally

If you're referring to the harness, Rostra's, part number 350-0061, will service all years 1993-2002. Have some petroleum jelly on hand to lube the o-rings and plug bore for ease of installation.

Continuity test all your solenoids while the pan's off - replace them if they fail or as a preventative measure.

 

[NickTransmissions]

I have a 98 k1500, and the transmission just started slipping and not wanting to shift in its own so I pulled a transmission and transfer case from my uncles truck he is parting out. That truck is a 1994 k1500 z71, here is my delema, my 4l60e is the later model with the removable bell housing, the donor 4l60e is not, it’s almost like a th350 or something. I believe the bell housing and torque converter bolt up if not I probably can change the flex plate, but what about wiring? Will it all just plug in? Or is it different? On another note he started removing it before I got to it and he kinda messed up the plug, I don’t know if it is missing pins, a couple are bent I think I can straighten them out

You need to find another 1998-2000 unit. GM went to a PWM TCC apply strategy in 1995 then made fairly significant changes to it in 1996-2000. So there's differences in the computer's TCU logic and corresponding differences in the valve body, pump and separator plate, 3-2 control solenoid and wiring harness. Unless you feel like adaptating that 94 unit to work in your 98 vehicle (meaning swapping all those parts I just listed in for 96-00 parts) You need to find a 98-00 unit that works.

 

[Schurkey]

Perhaps a moderator will move this thread from "Transfer Cases" to "Transmissions".