piperca

I know this has been addressed by others, but I can't, for the life of me, find it with the search feature.

Driving on the freeway this afternoon, cruising at 70 mph, and I notice the rpm's change. I glanced down at the tach and noticed it was surging between 2200 and 2300, obviously the tranny was loosing lockup. It did this about half a dozen times, over the period of about five minutes, now it's running fine. What's the fix? APPS reset?

phox_mulder

APPS reset might work, probably not though.

Try cleaning the battery terminals and reseating them really good.

Also, if your batteries are towards the end of their useful life, it can cause this problem.

Doesn't make sense, but it works for many.


phox

piperca

Battery terminals are tight and clean with dielectric grease.

This happened to me once before, about a month ago, but it only did it a couple of times while pulling a long steep grade, so I didn't give it much thought. This is the only other time it's happened. Makes me think that something's about to give. Any other suggestions?

2500CTD

I would like to know also. Mine did it bad enough to make the truck jerk slightly, enough to where I could feel it. I replaced the batteries and it fixed that, but most recent time towing I just noticed it on the tach also. Couldn't feel it this time. my tranny, every now and then gets an attitude about downshifting, but has so far been running ok.

Geico266

I left my lights on for a long time and when I restarted the truck it did the same thing. After the truck had time to charge up it quit. I did reset the throttle position switch.

piperca

What voltage should a battery hold when it's in decent shape?

I'm showing about 12.5 volts on each. I thought it should be around 12.63 volts, but I could be wrong. Wouldn't be the first time ... ask my wife!

Geico266

I believe 12.5v is on the way out, but its the load test that is real test. How old are your batteries?

piperca

Geico266, I think you're right. I have no idea how old they are, as they were in the truck when I bought it eight months ago. A couple of Sears Die Hard's. Probably time to step up to Interstate batteries ... those are what I normally put in all my cars, when the time comes.

Geico266

No, my son! (kidding) Optima's are the only way to go. Lead-acid batteries leak and can detroy all kinds of electrical stuff (cruise control module) under the driver side battery, and eat up the fender well walls. A set of Optimas are 40 pounds lighter so you are carrying around less weight on your front end parts, and "gell cells" WON"T leak. 5 year warranty also. (I think) It is a wise person who buys a proven quality product over old technology.

IMHO

bama

id spend the 40 bucks and try a noise filter..it got rid of that on my 02.........bama

piperca

40lbs, WOW, I'll have to check into those! See what happens when you start getting old!

EDIT: I went to the Optima site, did a search, and they were unable to return any results for my truck.

RickCJ

You just get the biggest red tops and put them in! They are smaller but have 800 cca, perfect for your Cummins! Longest warranty!

piperca

What's the model number of those puppies?

RickCJ

http://www.1st-optima-batteries.com/red_top_battery.asp


34

piperca

Thanks!