7AFE Transmission a bit notchy... Options

[englishdas]

The more I drive the car, i.e over 10minutes, the notchier it gets slotting back down from 3rd to 2nd or 1st. It's not terrible, but it's not right.

I reckon the condition of the Trans oil is my first stop, and have tracked down a supplier of MT90 'EBAY REDLINE MT90'

Now, I know that the capacity of the Trans is 2.6L (thanks, Rusty for C52 Trans Thread) So do I need 3 Bottles of this stuff, and (obviously not over-)fill it purely with MT90, or do I measure out standard 75w90 gear oil at about £7 per litre, and add the full bottle of MT90 to make up the 2.6L?

Am I making sense and/or overcomplicating it?

[SwissFerdi]

Mine has third gear synchro wear, but this is apparently common. I filled entirely with Pennzoil Synchromesh, and the grind is mostly gone. The SM fluid shifts very smoothly. Now I've got further notchiness like you describe, sometimes it won't go into first. I think this is more temperature-related though, as with the recent cool spells it has been getting worse and improving as time goes on. I'm tempted to partially drain and add a bit of 75W-90.

And like Smaay said, just fill until it starts puking it back at you. Now I don't know if exact leveling makes a difference, I imagine it does...the first time I filled the car was on four jack stands, so reasonably level. The second time I only had the car on the scissor jack but I cranked it down so that the car was level (stupid way to work under a vehicle, by the way, I do not recommend).

This post has been edited by SwissFerdi: Feb 6, 2014 - 7:30 PM