Oops i accidentally hit send. I know its critical. Never done it myself but i know there are write ups. How do you know if the clutch packs burn up?
Ill probably be doing this next weekend. Got some school work to do this week.
When the truck don't go anymore is always a good indication. The truck I am aware of this happening to, is the K1500 I bought for $500 cuz it had a bad trans. Had a new very low mileage crate motor. The kid added an Eddy EPS intake, and Eddy 600cfm carb. In the interchange of OEM parts, he didn't have the adapters and brackets to hook up the TV cable, and figured he'd only lose passing gear and drove the truck. He said he only put about 200 miles on the truck after the swap and after it would want to go into 3rd gear, it just went into N and spun the motor up. So he downshifted to 3rd, still nothing, downshifted to 2nd and now he has 2nd gear. I also drove the truck and got the RPM's up very high in 2nd and know I was going fast enough for 4th gear and still nothing. This pretty much told me the 3-4 clutch pack burnt up in that 200 miles he didn't have the cable hooked up.
So if your curious and want to be educated why this happens,
Unlike a Th350, the detent cable does provide throttle pressure signals to the valve body. These signals from the cable are what help determine shift points and passing gear, but that's it.
On the 700r4, the TV (throttle valve) cable does the same as the detent cable on a Th350, but with throttle pressure it also regulates fluid pressure. So if you're light throttle, fluid pressure does not have to be as high and the clutch packs are compressed with lighter pressure. If you get on the throttle pretty hard, the throttle valve knows this by the amount of pull on the cable and raises fluid pressure accordingly to hold the clutch packs tighter since more strain is being put on the clutches.
So what happens if the cable is NOT hooked up, and you take off with light throttle? Probably no harm since light fluid pressure is all that's needed. If you take off full throttle, and that cable is not being pulled, the trans does not increase the fluid pressure, therefore the whole time you're on the throttle hard, those clutches are just spinning, slipping and overheating. You're only going to be by with that a few times then the clutches are wore out and cooked then the trans don't work.
In a pinch, if your cable should break, or you want to drive it to a trans shop to get the cable hooked up or adjusted, chances are if you do light throttle takes offs, shift it manually so it's not shifting to early putting strain on the clutches, not using OD, not towing anything or carrying heavy weight, you can drive it with very little to no harm at all.
