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Won't shift out of 1st till around 2500rpm...

6332 Views 9 Replies 6 Participants Last post by  06TowRig
I've been reading as much as I can find and I've gathered that it probably the solenoid there at the filter but here's my story.

At first it was just 1-2-1-2-1-2-1-2 and I really didn't think anything about it because it wouldn't do it all the time. I get in it the other day and the engine light is on. I take off down the rode and after about 1500 rpm its like its in neutral. I hit the gas and the tack goes up but thats it. I'm also going down hill. So I stop, shut the truck off, start it back up and it still won't shift to 2nd. I get mad and hammer it and it shifts at 2500ish. The rest of the gears seem to shift fine but from 1st to 2nd theres a problem. When I first take off, going down the same hill, if I let off the gas just right, it will shift into 2nd at 1500 but only that 1 time.

The truck is a 2005 2500 4x4 diesel with 98000 miles. I changed the pan fluid and filter at 60000 miles. I planned on waiting till 100000 to change it again. I guess it beat me to it.

I'm going to autozone in the morning and letting then tell me what the code is. Any help from you guys would be great. I belive Ican change the solenoid and the sensor myself but if its anything else, someone else will have to do it.

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Is it very hard to put in?
No, drop the pan, locate the solenoid, unplug wiring, remove 4 bolts pull out of trans. Re-install upgraded solenoid in reverse order. You will want to do a band adjustment while you are in there also. It is very easy too. I know that you need to tightne it to 72in pounds then back it off ?? turns and tighten jamb nut so it can't change. I don't remember how many turns to back it off, but I don't have an inch pound torque wrench so Bill Kondolay walked me through mine using a 1/4" allen wrench. You will locate the band adjustment, pull down the lever, insert the 1/4" allen wrench and tighten adjustment bolt down to snug but not tight, then retighten jamb nut. Done. Replace trans filter, reinstall pan and refill with ATF+4.
By the way, Autozone's scanner will not read our trucks, so don't waste you time and fuel going down there. If you know someone that has a Bully Dog Triple Dog or a Smarty call them up and have them read it for you.

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