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Registered User
Join Date: Jul 2001
Location: Rochester, NY
Posts: 502
Question 3rd is playing hard to get

replaced all shift bushings, broken spring and upper spring seat in shifter, new tapered pins in shift rod, no significant play anywhere, even used the zip-tie trick mentioned in a post here to take out the last bit of slop between the shifter rod and the new bushing back at the tranny housing. the thing shifts much better than when I got it two years ago (that's only a few hundred miles, I've been working on it a lot), but there's still one problem: when going into 3rd, about half the time it hangs up with a rubbery feel between Neutral and 3rd, and then if you pull back a bit harder it sort of goes 'klunk' and pops into gear... like the shifter is stuck on something and then hops over it. The other half of the time it's a bit notchy but not too bad. No grinding of the gears at all. 1, 2 4 and 5 all feel pretty good, although 1st will feel similar in maybe 1 of 10 or 20 shifts. the other gears always feel fine. just plain old new 80W90 gear oil in it, right up to the fill hole and no higher; felt similar before with the mystery blue-green gear oil in there. Any ideas? BTW: is $125 a decent price for a sideshifter core (was 'OK when removed' but little history is known)?
Old 08-12-2002, 01:03 PM
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John Rogers's Avatar
Join Date: Dec 1969
Location: chula vista ca usa
Posts: 5,295
Do you have troubles when going in a straight line or around corners? If you are hanging up on corners then it is the engine/tranny mounts that are failing and need replacement. The engine is shifting causing misalignment of the shift linkage. You could also try unhooking the linkage at the tranny and shift through each gear while someone turns a wheel for a little resistance. If a gear/synchro/slider/etc is failing then you can feel it. This will eliminate all linkage possibilities. Good luck.
Old 08-12-2002, 07:51 PM
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red-beard's Avatar
Join Date: Jul 2000
Location: Houston, Tejas
Posts: 38,230
Last things first. $125 is an excellent price for a sideshifter core. You'll have exactly what you need to fix 3rd gear.

I suspect that your synchro is OK, but the slider and the dog teeth are getting done. And on 1st gear too. Even with a synchrochange, you get wear on the slider everytime you shift into gear. Eventually, they wear out. The points become blunted and what you describes happens.

Next investment: The two special tools for the tranny (shift fork alignment tool and the dog teeth remover).

The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
Old 08-12-2002, 08:10 PM
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Join Date: Jul 2000
Posts: 74
The "mystery blue-green gear oil" was Swepco 201 - the recommended gear oil for 901 & 915 trannys.

Old 08-13-2002, 08:14 AM
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