Tony, double clutch up without revving up engine, and double clutch down
while revving the engine and it shifts without grinding,(most of the time).
Ed Morgan
-----Original Message-----
From: tonygull <tonygull@ozemail.com.au>
To: Military Vehicles Mailing List <mil-veh@mil-veh.org>
Date: Thursday, January 31, 2002 2:24 PM
Subject: [MV] GMC clutch, dif centres
>I adjusted the clutch so that it actuates only about 1 inch from the floor.
>Now there is about 4 inch 'freeplay'
>
>Prior to that it was by the book, ie about 2.5 inches freeplay
>and 2.5 inch above floor.
>
>I did this as it was explained, as i understood it, that the diagphram
>return spring in the GMC is a sheetmetal part, and does not like to flex
>too far...if it does, it may not return, leaving one stranded i presume.
>
>I imagine this arrangement serves the same function to the multi-finger
>sheetmetal, throwout bearing arrangement in modern clutches.
>
>Am i right so far?
>
>What is the fix if u r stranded..i would hate to be on parade and
>have that happen!...can one pry thru the cutouts in the clutch housings
>or does the engine or tranny have to be moved.
>
>(I know for a fact they will start in LoLo..not a pleasant thing)
>
>I have got my NOS dif centre out..and I also have another dif centre,
>which i assumed was a rear dif, cause it is bigger...but GMC difs are
>the same front and back...arent they?
>
>This one ( banjo) is about 25% bigger than the GMC..it has a ring gear
>14-15 inches, the cover has much heavier ribbing and some bolt holes
>are braced..it does not have the pinion adjuster.
>
>Is it a Blitz dif maybe...are they a bit bigger?
>
>they had Whites and Federals also. ( Transfield)
>
>I dont need it...are they saleable?
>
>My truck is at the blast yard..the tray will be off and all blasted soon.
>The blasters were all most impressed..one came forward and said he wanted
>to do the job..he showed me his WWII Willys Jeep, and offered me his under
>cover spot in the yard, I said jump in and he drove it about for a while
>...it was my first chance also to really master the double-clutch thing!!
>
>I am still hopeless, but i got 3 - 2 right mainly..i could also find
>the correct gear mostly (strange shift pattern) but still ground gears.
>
>Should one double clutch on upshifts?..I dont and it seems ok..at
>exactly the right revs..if i miss, then i double clutch.
>
>I tried double clutching on all upshifts, but that was worse.
>
>Should i expect to just grind gears...will this hurt them?
>
> regards tony
>
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