Change Fluid and Filter or not? 4R70W
I have a 1996 Ford Thunderbird LX Sport that has 122,500 miles on it with the 4.6L V8 and I believe 4R70W from what I have researched.
After reading about the potential problems with these transmissions I decided to call back the guy I bought the car from recently and asked him about the maintenance on the transmission.
He stated he had the Transmission Flushed at 30,000 miles but did not replace the filter.
I went down to the ford dealership and asked what they would charge to flush the fluid and change the filter and he said he would not do it. He took a sniff of the transmission fluid dipstick and said my fluid looked and smelled burnt to him. He said that since it had not been done in 95,000 miles that it would probably do more harm then good to change the filter and fluid in it.
As far as the infamous "shudder" between 2nd and 3rd gear I do not believe I am experiencing this. What concerns me is sometimes when I am mildly accelerating from a dead stop it feels soft then feels like it tightens up a little (all in same gear, overdrive off) It is ever so slight and I am not sure if I am just being paranoid as well as the fact I am not used to these "soft shift" tranmissions. The fluid level is fine so adding fluid will not help.
The other thing I have noticed is when I am driving around 30 the car doesn't really seem to know what gear to be in and it feels like it is "lugging" when in 3rd gear. (I don't think its the shudder as it is barely noticeable. People have said the shudder feels like driving over railroad tracks?)
Lastly, when romping on the pedal it seems to shift ok, but when letting off the gas it seems like it takes longer then it should to for the engine to back down and the transmission to decide to what gear it should decide on.
My question to you experts on this transmission, should I change the fluid and filter or not? I want to get as much life out of this tranny as possible.
Any input on this is appreciated as I have not had a car with an automatic transmission in 10 years.
P.S. The Previous Owner was a handicapped lady who drove this car round trip of about 90 highway miles a day. I am pretty sure it was not hot-rodded, and she drives pretty slow. When asked she didn't even know there was a button to turn overdrive off. So she drove it in overdrive ALL of time.
Last edited by Rhyno; 08-16-2004 at 04:42 PM.