1990 Chevrolet Sub Trans Problems

[sasquatch]

Alright, so I'm not down here in CS for more than a day and the transmission on my sub is acting weird. When you put it in drive it clunks hard, not the normal clunk it makes because its got 220k miles, but it shakes the truck. Also it revs up real high for the shift from 1 to 2, and it is violent too. I checked the fluid, its fine. Its a 2wd half ton with a 350 and I guess a th350. I don't really know. I know its got alot of miles, don't tell me I need to rebuilt the trans. Tell me what the problem could be.

[uglyota]

700r4. You don't need to rebuild it you need to throw it in a lake.
Is it leaking anywhere? Fluid didn't look burnt?

[sasquatch]

Fluid looked clean and was the right color. No leaks that I know of, I don't remember having to top anything off except the oil. It doesn't leave any puddles after its been parked. Its a good truck, my dad drove it for 219 of those 220 thousand miles and he some how makes vehicles last forever. The whole thing is pretty much original and it drives great, other than the transmission lately.

[Doug Krebs]

If you got 220,000 miles out of a 700R4 without a rebuild I'd say you have gotten more than your money's worth. Personally if I knew what the problem was I wouldn't fix just that problem anyways, I'd rebuild the whole thing. However, it does sound like a torque converter problem to me.

[aggieblazer07]

I agree that it would be worth spending the time to rebuild it now. That way it won't leave you stranded in the near future

[stx4wheeler]

what happened to the zj?

[sasquatch]

rolled on its side

[sasquatch]

I drove it alot today and it seemed to get better the more I drove it. I baby it so nothing breaks since its got so many miles. Reverse seems normal as well. I don't know.

[stx4wheeler]

damn man that blows, i told you that doing the no swaybar test for passengers would get you :flipoff2: . so do you still have it or did it go bye bye.

[sasquatch]

Parents though it would be best if they got rid of it

[sasquatch]

Also, in order to keep my head from being introduced to the concrete I had to use my arm to keep myself in the jeep. It got a little messed up. Broke both bones and got a little road rash, and had to have two plates and 12 screws put in. But I'm thankful I still have a arm and supposedly I'll make a full recovery.

[JeepPhisherman]

Damn, atleast my lower arms held up!

[Shaggy]

when did that happen and was it on the street

[sasquatch]

about 6 weeks ago in my neighborhood

[AggieTJ2007]

to bad it wasn't off road. So where did the jeep go?

[sasquatch]

Scrap as far as I know. On the subject of the transmission, some valve in the trans that deals with throttle control was sticking and causing it to act like that, so no rebuild. I'm going to see how long I can make it last. I am getting the original u-joints replaced though.

[agjohn02]

if the throttle valve is sticking it'll burn up the planetary in no time and itll burn clutches if you get on it. one reason i havent seen the true potential of the scout yet is because im too lazy to actually set the throttle valve cable up correctly.

if you wanna make it last, disconnect the tv cable from the throttle cam and let it shift hard all the time. it'll suck at slow speeds but it'll keep from burning the thing up. you'll learn how to pedal it to keep the tire barking to a minimum.

[sasquatch]

well, I'm getting the valve replaced since its cheaper than rebuilding the whole thing. The guy that looked at it said the transmission was in great shape and has plenty of life left in it. So it'll be back to normal on monday. Wouldn't letting it shift rough all the time be hard on the drivetrain? It is only a 10 bolt in the rear.

[agjohn02]

it's tough on u-joints but they're cheaper than transmissions