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Discussion Starter · #1 ·
Can anyone help me out. my 1990 K2500 4X4 is stuck in first and I am looking for tricks ideas and maybe some help. I can give a complete run down of what everything is doing it is needed to know.
Thank you
 

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Discussion Starter · #7 ·
700R4 wont shift

Check the gear (plastic) on the governor and the valve inside the governor asembly.
I bought a new govener and have yet to put it in. I hope it fixes the problem. Cause spending $50 to get a new govenor is pricey but did it anyways just got to drop the front drive shaft and put the new one in.
 

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It could also be a stuck 1-2 valvetrain in the valve body. I had one apart(cast iron VB) and cleaned up the 1-2 shift valve train then added lubeguard red to new fluid and it was fixed. I seem to remember another one with an aluminum valve body that needed to be reamed and an oversized valve installed.
 

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Discussion Starter · #9 ·
I took it apart and bad news for me.....

I dumped $50 into a new govenor and pulled the pan to find my tranny fluid was black and there was tons of clutch pieces in the bottom of the pan. Now on to finding a good cheap used 700R4
 

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Discussion Starter · #10 ·
How hard is it to rebuild a 700R4 from top to bottom. I have the OEM factory Books made for my 1990 chevy. But I have never rebuilt a tranny before and the book shows everything just looks complicated.
 

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The 700R4 isn't the easiest Trans to start out with if you've never built one. I suggest investing in a Rebuild/Overhaul video and an ATSG Manual to help you along.
One tool that is needed is the rear clutch spring compressor tool and a good set of Lock-Ring pliers. Other things/tools can be used for most parts. Should replace all the Bushings, Trans Shop will do it fairly cheap.

https://www.700r4l60e.com/store/home.php?cat=63
Dana @Pro-Built can put together a good Build kit for you or other Co.'s
www.CKPerformance.com
700R4 Transmission Parts GM Rear Wheel Drive
https://www.wittrans.com/Schematic.aspx?Transmission=700R4
700R4 transmission parts 700R4 transmission kits
 
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