Transmission Car has 200000 plus miles. Getting on highway, the transmission seems to slip, but once on highway the rpm's stay constant.It does use tran fluid, but no drips under car. Is the transmission going?

The idle air control solenoid is very common to quit working. The only other thing would be a large vacuum leak.

take the oil pan off and inspect for any metal particles then change filter and recommended trans oil as is said on your dipstick.you need 10.4 liters of trans fluid.Also contamination in the valve body could cause this and any sensors in it.If your car has over 200000 KM than get it rebuild.

Is the overdrive light flashing when this Happens. If so, it's slipping in fourth and internal repair is necessary, especially if the trans fluid smells burnt. Yes! and have the trans scanned for transmission codes (could be an electrical problem ie. bad shift solenoid). Best of luck, hope this helps.

Sounds like it's bypassing the overdrive seals. This is the solenoid package. I would put some transmission additive in first, this reconditions the seals. TranX, Lucus are both good.

HAS THE TRANSMISSION FLUID AND FILTER BEEN CHANGED? IT IS DUE EVERY 60,000 MILES, TRANS FLUID HAS WHAT ARE CALLED "FRICTION MODIFIERS" IN IT, THEY WEAR OUT AND CAN CAUSE THE CHATTER YOU FEEL.

have car scanned for codes in engine and transmission at a shop could have a bad sensor etc

Either it one heck of a coincidence or the trans is somehow associated with or to the water temp.. The only way I know of is the transmission oil cooling. Ck the trans fluid level and onsider having the trans service.Oil change and filter and confirm or ask about the relationship of cooland and trans, if there is any. Good Luc and please let me know what you find out. Thanks Ned

timing belt slipping?

it depends on the trans but ford had alot of problems with though years with the overdrive shift kit it is a band in the trans and it pop out and break you need to take to local trans shop and let them look at it and tell them the problem and they will take the trans out and crack it up and replace the part that need to be replace before you have to replace the whole trans the ford dealerships dont have the best trans people hate to say that but it true take to someone who specialize in trans only

what you might be seeing is the fluid that leaked before still coming off the transmission. is the level staying steady ?

it might be slipping or you are more focused on how the transmission shifts now then you were before.

there is a product i have tried on slipping transmissions and it's made by lucas (can't remember the exact name) it basically thickens the transmission fluid to prevent slipping. according to the label it would not void the warrenty (if you have any remaining on that car).

Robert

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