I ve been told by many auto savvy people that when a car gets old and has a lot of miles you shouldnt change the trans fluid or it may not shift anymore? why is this?
2007-08-18 19:19:17 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
This all started with old Ford transmissions from the 60's or 70's because the factory recommended fluid would leave a gummy coating on all the internals. Transmission fluid is a detergent, and would clean all the gum off the inside of the transmission, quickly leaving the freshly serviced transmission useless, because the gummy residue would cling to the valves in the transmission. When a customer pulls in an old ford, a common practice was to just change the filter, and replace the old fluid.
Old Chevy's and Plymouth's do not have this problem, unless some one had used ford transmission fluid in them.
Modern cars, regardless of mileage, should have their transmission fluids changed and refilled using a factory specific fluid, and should have no problems
2007-08-19 00:07:51 · answer #1 · answered by jim 5 · 1⤊ 0⤋
The rationale behind this reasoning, is that it may cause problems with the transmission leaking, or other problems. The new fluid will have fresh additives and cleaners that may remove a lot of the junk in the tranny and then plug filters and mess up the shifts.
I think you are better off, putting in fresh fluid and keeping it clean. I try to have my cars transmission fluid about every 25-30K miles. I could not tell you the last time I had a transmission problem with my cars.
good luck.
2007-08-18 20:05:43 · answer #2 · answered by Fordman 7 · 2⤊ 0⤋
makes no sense to me tranny fluid has additives in it call friction modifiers these normally start to break down somewhere around 60-70 k plus the filter gets dirty which causes a starvation of fluid in the pump and causes more wear on the bands and friction plates then to top it off it starts to gum up the valve body and guess what it doesnt shift any more that is why the mfg usually recommends a filter fluid change at 60k
2007-08-18 19:34:36 · answer #3 · answered by dead7 4 · 1⤊ 0⤋
The friction material from the clutch plates wears off and is in the fluid. When you change the fluid, the material is lost. Not having that material may make the tranny shift sloppy.
2007-08-19 00:29:19 · answer #4 · answered by john k 2 · 0⤊ 1⤋
thats a load. keep clean oil inn it. if the transmision sucks get a new one. but whoever told you that need to check their information again and go change their oil. did they tell you not to change your engine oil too?
2007-08-18 19:36:11 · answer #5 · answered by Anonymous · 1⤊ 0⤋
I agree with ford man.
2007-08-18 20:18:20 · answer #6 · answered by shawn s 4 · 0⤊ 0⤋
That is bogus information! Keep it clean and flowing!
2007-08-18 19:24:40 · answer #7 · answered by BP 4 · 1⤊ 0⤋