Engine/Transmission (1998.5 - 2002) 6 speed fluid change

[CraigJohnson]

O. K. so I have the replacement fluid I'm going to use in my 6 speed. Now what is the drill on draining the old and filling with the new fluid?



Thanks,



Craig

 

[Texas Diesel]

Take out one of the bottom PTO cover bolts to drain, fill through the 17mm plug on the drivers side of the transmission. Use silicone to seal the bolt (9/16) when you put it back in. Now would be a good time to put on a Fastcooler (driver side) and a PTO filter (passenger side) and fill with Synchromax fluid from Royal Purple, I just put 4000 miles on her with the RP stuff and had perfect shifting even at 19F. Unfortunately, I had a 1 st gear problem that is not lubricant related. The 1st gear issue existed before I tried the RP stuff and the switch to RP was a vain attempt to make it work right. The transmission was replaced and shifts perfectly now. It seemed to run about 15-20*F cooler, and the RP stuff is fully synthetic and safe for syncros. I started looking for an alternative to the OEM stuff after I found that the Texaco lube was jelling after 30,000 miles, see my album for a picture of the OEM lube.

 

[Riflesmith]

It is beneficial to remove the driver's side PTO cover and clean the bottom of the transmission case. You can only do this from the driver's side. There is a magnet in the bottom of the case that collects quite a bit of iron. You can remove it for cleaning as well.

 

[LWINGATE]

Craig, why are you changing your oil at such low mileage and what are you putting in?

 

[Bob Cochran]

I have Amsoil in mine and shifts okay. The chance is as easy as described by Texas Diesel. Only problem I had was finding the big hex 17 mm to remove the plug. My rear trans seal a little damp. You think if I have it changed on warrantly the **** stealer will know?