Engine/Transmission (1998.5 - 2002) erratic lock up shift

[tmarti96]

I know this has probably been hashed over a million times, but it is new to me. I have 98 24 valve, and all seems normal til it gets to the lock up shift, in 4th. it goes back and forth at around 45-50 mph(in and out of lock up) then I speed up and it goes in the non lockup mode and stays there. Where do I start looking?TPS? seems like throttle position controls it. when I nail it, it goes into non lock up. thanks a million. (signature not current. 95 gone. enter 98 24 Valve. )

 

[Tom W]

Your close, probably only half a million times. Do a search on erratic torque converter lock up and clean your battery terminals.



Tom

 

[tmarti96]

Tom W. in Austin



God bless you. cleaned cable ends at batt connection and all shifts smooth now!! Now one more question. Don't know if I have 354 or 4. 10 gear. At 65 mph, tach reads 2200 . I have standard size tires, 245X75X 16 and it gets 20. 5 mpg empty. what does that tell you. I did have a 95 Ram Diesel with 3. 54 gear at 70 mph I was making 1900 rpm. . Also, the 95 had a code, or it just told you, on tag under hood. Where does 98 model tell yu gear ration. thanks.

 

[kboettcher]

I have a 98. 5 24valve and mine has a Spicer 70 rearend with 3. 55 gears in it. It is a automatic, and if I'm not mistaken, I am at about 1500rpm at 50 mph, give or take..... not quite as much freeway up here

 

[bbsher]

Tmarti96

I have a 98. 5, 24V that I put 273 gears in and I run just 1750 at 60 MPH. It had 355's in it and with them I ran 1600 at 60 MPH. My ratio is on a sticker under the hood. Sounds like your ratio is 410 to 1.

 

[cstone]

Crawl under the truck and look at the little metal tag bolted to the differential cover. It will tell you what gears that you have in there.