RandomBytes
New Member
Hi folks
Ok, this may sound odd for you US guys but Australian 4 speeds with the heavy diff option run much the same yoke as your 727 - 29 spline, 7290 uni-joints. Now, the problem.
At one stage, some 20 years ago, I could not get any 7290 - Moog 316 - uni joints at all so I took the tailshaft & yoke with me to a bearing store and they sold me some Precision/Moog 534G ones which fitted well. Now these are totally unavailable in this country but I did get some 316 units - they just don't fit the same. The 534g are .065" less wide between the outer snap ring lands (2.563") . Measuring the tailshaft ends, they measure 2.625" between the "ears" which leaves 0 clearance for the 316's (2.6248") so the uni's are tight.
On the bench, if you tilt the yoke up, it will fall back under it's own weight and you can rock the uni at the other end back and forth with a push but is this ok? Strangely, the uni in the actual slip yoke moves fine and it measures slight less - 2.615...
The 316's are 2.6248 according to Moog - perhaps just not enough clearance? I have done the cap centering routine and tapping all around the yoke with a brass hammer. This did free them up enough to move as when the circlip was first driven home, nothing moved at all.. Circlips look to be far enough down in the grooves.
Other big problem is the slip yoke. Current ones intended for the later tranmissions will not fit the old 727's - the spline "pitch" is different it seems and it was hard enough to get a replacement yoke in Australia 30 years ago let alone now! Scared to hit it too hard...
So, is it okay to hope that the uni joints will loosen up a bit with wear or will I just grind the crap out of the end of the rollers?
Is the 534g ok with the extra clearance? I did try the 316's with less thick snap rings - those that were used on the 534G - but you could see space in the circlip lands and there was a really bad vibration in the drive line felt through the seat frame and the pedals...
Any help much appreciated!
Glen - Chrysler Valiant Charger 1972 Six-Pack.
Ok, this may sound odd for you US guys but Australian 4 speeds with the heavy diff option run much the same yoke as your 727 - 29 spline, 7290 uni-joints. Now, the problem.
At one stage, some 20 years ago, I could not get any 7290 - Moog 316 - uni joints at all so I took the tailshaft & yoke with me to a bearing store and they sold me some Precision/Moog 534G ones which fitted well. Now these are totally unavailable in this country but I did get some 316 units - they just don't fit the same. The 534g are .065" less wide between the outer snap ring lands (2.563") . Measuring the tailshaft ends, they measure 2.625" between the "ears" which leaves 0 clearance for the 316's (2.6248") so the uni's are tight.
On the bench, if you tilt the yoke up, it will fall back under it's own weight and you can rock the uni at the other end back and forth with a push but is this ok? Strangely, the uni in the actual slip yoke moves fine and it measures slight less - 2.615...
The 316's are 2.6248 according to Moog - perhaps just not enough clearance? I have done the cap centering routine and tapping all around the yoke with a brass hammer. This did free them up enough to move as when the circlip was first driven home, nothing moved at all.. Circlips look to be far enough down in the grooves.
Other big problem is the slip yoke. Current ones intended for the later tranmissions will not fit the old 727's - the spline "pitch" is different it seems and it was hard enough to get a replacement yoke in Australia 30 years ago let alone now! Scared to hit it too hard...
So, is it okay to hope that the uni joints will loosen up a bit with wear or will I just grind the crap out of the end of the rollers?
Is the 534g ok with the extra clearance? I did try the 316's with less thick snap rings - those that were used on the 534G - but you could see space in the circlip lands and there was a really bad vibration in the drive line felt through the seat frame and the pedals...
Any help much appreciated!
Glen - Chrysler Valiant Charger 1972 Six-Pack.