[sneal4600]

Do not be afraid to change the diff fluid, it is very easy. However, you do need a lift or at least jack the car up to work safely under it.

There are two allen head plugs on the diff. One drain and one fill. Remove fill first to ensure it comes off before you drain the diff.

These plugs will be either 12mm or 14mm. Mine was 14mm. I used a socked style allen from a three pack sold at Autozone. It had 12 and 14 included. You will need to take a drift pin and hammer to pop the allen out of the socket to get the drain off (clearence from exhaust) and use a box wrench on the allen to turn it.

Once both plugs are out and fluid is drained, refill with about 1.5 bottles of fluid (brand of your choice).

This is literally a 10 min job and prob easier than an oil change.

 

[slideways]

Gearbox oil change is almost as easy as an oil change. I want to say there were 2 14mm bolts, and yes, open the fill plug before the drain plug. Do not be intimidated by this. Just make sure you have a small hand pump with associated tubing to get the box full of your favorite synthetic fluid ~2 quarts worth. I used Royal Purple Synchromax, as many on this board had suggested, and the car does seem to shift a bit smoother now, not to mention the "lifetime" fluid that came out looked to be pretty worn. Good luck, this board is a wealth of information!

 

[jgfabs]

Gearbox oil change is almost as easy as an oil change. I want to say there were 2 14mm bolts, and yes, open the fill plug before the drain plug. Do not be intimidated by this. Just make sure you have a small hand pump with associated tubing to get the box full of your favorite synthetic fluid ~2 quarts worth. I used Royal Purple Synchromax, as many on this board had suggested, and the car does seem to shift a bit smoother now, not to mention the "lifetime" fluid that came out looked to be pretty worn. Good luck, this board is a wealth of information!

I might look into that purple stuff......is it good?

 

[TimCarbonBlackM5]

I would say that it most definitely is. I have it in my Tremec TKO 600 in my 69 Camaro and have also put it in other manual transmissions in other cars that I have driven in the past and have nothing but great performance and reliability from all of them. It has definitely made noticeable improvements in the smoothness of the shifts IMHO. I would say this about all Royal Purple products including their engine oil. Just my $0.02 though.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>