Rear Dif Fluid

[StankinLincoln]

i worked at valvoline for a while and they said that you dont mess with ford rear difs. i know that valvoline is a little screwy but i was wondering if this is true. i have 108k on my 96 town car and was wanting to replace the fluid i just didnt know if it was ok or not. i know never to do the coolant flush on such high mileage cause the last 2 cars i did it to made the engine spray coolant everywhere. that happened to a 91 caprice and my 94 ltc. also transmission fluid. should i just drain and fill my coolant and transmission fluids or leave them alone. sorry for the weak questions but ive never gotten a straight answer because every car is different and i dont want to mess this car up.

 

[StankinLincoln]

noticed this post didnt have much time to be on the main page so im just putting it back out there. any help would be appreciated

 

[dRock95MarkVIII]

At over 100k miles, it's time to replace that rear differential fluid. 80w90 will be good.



For the coolant, all I do is a drain (from radiator petcock) and refill, but I don't let my cooling systems go (I replace the coolant yearly)
You will also want a new MOTORCRAFT 192/195 thermostat and thermostat o-ring. Make sure to drain the system down before pulling the thermostat, and to close the petcock and refill from the thermostat opening before installing the new one - which will make bleeding go a lot easier.


For the transmission fluid, just drop the pan to empty it and drain the torque convertor - that will get most of it. If you go to crownvic.net and click on the tech link near the top there is a how-to. DON'T change your ATF if brown or smells burnt.

 

[StankinLincoln]

thank you very much for the info.

 

[Sixlitre]

Easy as pie

Sixlitre

 

[StankinLincoln]

does look easy. would you recommend synthetic or conventional gear lube?

 

[slowmkviii]

I would go with synthetic if you plan on keeping the car

 

[StankinLincoln]

thank you for the help.