...I have gone over All of the Previous Posts!
Here's what I come Up with!
1. The 'Rod End' Trunnion Bearing! Should be Adjusted to the 'Maximum Height', And Allow the Shifter Rod to CLEAR the Halfshaft U-Joint, by Only 5/8"-3/4"! Has The ROD and Trunnion Ever Been Greased(NOT Oil!)?? It Must have Lubrication! The 'Rod' gets Hot, Expands MORE than the Bearing; and Binds in the Rod End! Here is where You get the 'Sticky' from! Remember, the Rod runs right under the Header!
2. Your Shifting Problem started when You Installed the 'Twin Disks'? Two disks, Obviously, are Thicker than a Single Disc...On the 'Slave' Cylinder there is an Threaded 'Adjustment' at the Small Linkage that connects the Slave to the Lever, I would Adjust that OUT More to 'Tighten' Up the 'Disengagement' of the Clutch...Right Up 'Near' the Point where 'ENgagement' Occurs!
The Disks Heat-Up, Gain in Thickness, and Drag Power to the Trans as Your Trying to Engage Gears!
3. GET RID OF THE GATES!!!! ALL of the Gates! Stop Playing with the Shifter Rod!!...If that were the Problem! The Problem would be there, when Cold!! You have it Near Centered! That's All You Can Do! This Machinist is telling You! By Their Design, the 'Gates' Will NEVER Match-Up to the Requirements of the Gearbox!! Even though, Some think they Do, They are Off as MisMatched! To Make It Simple! You Are Fighting In the Middle of a 'War' Between the Slots on a Plate and the Position the Transaxle 'Selectors' NEED to be In; to Achieve a Smooth, 'Completed' Mesh of Syncros To Gears! The Plate Hinders Full Movement of the Shift Lever, Not Completing Full Shifts.
4. Are You using 80W-90 Gear-Lube in the Gearbox?
5. Have You Confirmed..there IS Grease in the 'Shifter Box'? The little Box on the Side of the Transaxle, that the Shifter Rod Connects To.
Now...Are You aware of what the 2 little Rubber Plugs are Hiding, underneath that Same little Box? You need to get under the Transaxle to see them! They Hide 2 Set-Screws! These set screws Loosen-Up, All the Time!! They keep the 'Internal' Crank Lever; Tight on the 'Crosshaft'! Ofcorse, as stated earlier, If that were the Problem...It would Happen when Cold! Unless 'IT' Only Loosens-Up after it gets Hot!
One More thing about those 2 Setscrews; The Only way to check them is to pull the 4 Bolts on the Cover and LOOK in there while moving the Shift Rod, and See if the...It's a Lever/Crank Mounted on a Cross-Shaft, With a 'Ball and Socket' Joint on the End of the Lever!(and THAT had Better Be Well Greased!!) It gets NO Oil from the Main Box! You must Visually Verify IT Does Not Slip on the Shaft!
Now get this...You can Get to the Set Screws with a 'T' handle 'Allen' Wrench; Just by pulling those Plugs out! That's Why They're-There!! I'am NOT betting 'This' is the Problem! But it Can be a Hidden and UNdetectable 'Lose of Motion'! I recommend they be checked Often and when any Shifting Problems Arise.
Take My Advice for what it's worth! I've Driven My Pantera for 11 Years...Never had a Shifting Problem! I DO Run the Oilite Bronze Pilot Bearing! I threw the Original Gated Plate in the Trash, the Day I Purchased the Pantera, I Machined My Own 'Fingerless' Plate!!
If I come up with more thoughts, I'll get back to You!...
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