700r4 stacked shifts

[Gr8whiteninja]

I have an ‘89 v1500 suburban with a 700r4. I replaced the transmission a year and a half ago with one my buddy pulled out of a k5 he bought. Supposedly it was rebuilt. It was the only clean thing under that k5. So last night on my way home from work I took off from a stop sign and my transmission stack shifted into third. I haven’t had any issues with it since I installed last year. I double checked the tv cable everything seems to be fine there. Anybody have an idea of what it could be? The lockup solenoid? The valve body? This is my daily driver so I need to get it back on the road hopefully without taking it to a shop. Thanks for the help guys.

 

[1987 GMC Jimmy]

I think you can put any concerns with the TCC stuff aside for the moment. I’d revisit the TV cable first. It took a really close examination for me to see mine was frayed, and I had to replace it. Have you followed the spec procedure for adjustment? I think the first thing I’d look for is a sticking governor, especially since it should be easily accessible on a 4x4. I’ve had throttle valve issues, and they weren’t like that.

 

[Gr8whiteninja]

I’ll check the governor in morning. I might pull the tv cable out and check it for fraying. I just found it weird that it just happened. Thanks for the reply.

 

[1987 GMC Jimmy]

No problem! Mine did it near the bracket so there was no removal necessary, just a careful looking. Governor issues can make them do funny things sometimes. The shaft on mine was not true, and it was shifting like crap. The gear strips on some, the weights seize on some... I’d let others chime in and give more perspective. I’m far from an expert on these.

 

[Gr8whiteninja]

The last transmission I had in it the weights on the governor seized up, but by the time I figured that out the transmission went out.

 

[Gr8whiteninja]

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Well I think that might be my problem.

 

[1987 GMC Jimmy]

Well I think that might be my problem.

What’d you find?

 

[Gr8whiteninja]

Sorry took a second to upload the picture. Governor gear was broken.

 

[1987 GMC Jimmy]

Well, it’s a damn good thing you checked it. Looks like you’ve got your work cut out for you, but you’ll be back on the road in no time.

 

[Gr8whiteninja]

Yup on my way to a transmission place to pick up a new replacement gear.

 

[Gr8whiteninja]

So while is was at the transmission place I picked up a new tv cable. It doesnt have the adjustment tab instead it twists to adjust the length. Anybody ever use a cable like this? They said it is supposed to fit my ‘89 burb

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[1987 GMC Jimmy]

Hmm... Not me. I ordered the AC Delco cable from Amazon, and it was made exactly like the original.

 

[Obwonkonobe]

Ive got one with a clamp to get you close, then you press a button and move the body to adjust. I'd say as long as you know what you're doing you'll be ok. Just be sure it stays in place, I'm not sure if id trust it unless it has a way to keep it clamped in adjustment

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[Gr8whiteninja]

Well put the new governor gear in and now it shifts great! Thanks 1987 GMC Jimmy. I honestly didn’t even suspect the governor until you mentioned it.