700r4 w/ shift kit

Two years ago, I had a shift kit installed to extend the life on my 89 k5 when the shift to second was delayed way too long. With 350,000 miles, it was no surprise, but lack of money for a new tranny and it being my only
vehicle, led me to this $200 fix. When I had the tranny rebuilt last year, the rebuilder asked if I wanted to keep the shift kit. I was led to believe the valve bores were worn and the springs would prevent sticking. The shift kit allows a few more RPMs before shift and the transition shift is very smooth. But, when it is cold, just starting out the trans seems to hunt for the proper gear quite smoothly, but shifting up and down more frequently than when it warms up to normal temps. Can anyone explain what is happening, and whether the shift kit is harmful ? Again the shifts are very smooth. Would starting out in (D) rather than (od) help or do I even need to be concerned ? $1800 is hard to come by, and I depend on this vehicle. Thanks to all who have helped in the past. I have learned alot, but transmissions are still beyond my thorough understanding. Black Dog
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On Thu, 01 Feb 2007 16:33:33 GMT, "Black Dog"

I think you may be chasing the wrong monkey here. The tranny is responding to engine load and RPM and that is why it is hunting until warm. It is likely that your effective gear ratio is kinda tall and with vehicle and engine being stiffer until it warms up it takes more power to move vehicle and hence more throttle relative to ground speed. The 700R4 has a throttle control cable as I recall which tell tranny when to shift (it is not electronically controlled). You might tweak its adjustment some too. ----------------- TheSnoMan.com
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The throtle cable is factory. When it was rebuilt, the mechanic put on a universal cable which stretched, and was adjusted, several times. As soon as the factory cable was installed, it was perfect....I wondered if temp affected it some. Most people might not notice the subtle changes. I'm real easy on it. 3:73 rear and plenty strong. Everything is factory spec. There is no adjustment on the new cable unless I use some kind of shims....
wrote:

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On Thu, 01 Feb 2007 23:08:15 GMT, "Black Dog"

I do not consider a 3.73 a strong gear in a 4x4 and especaily if it does not have stock tires. (marginal at best) The 700R4 (like the 4L60) has a 3.06 to one first gear so it can feel stronger than a truck with a 4L80 (which has a 2.48 first gear) with a 4.10 on takeoff but it fades as it upshifts and in OD that 3.73 looks like a about a 2.6 drive axle (.7 OD vs .75 on a 4L80). On the cable, the only way to tweak it is to bean the bracket a bit that it is attached to near the throttle bores. (you will not have to bend it much) ----------------- TheSnoMan.com
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