Recent content by KickDown

Thank you all guys for taking the time to look. Yeah these things are rare. I managed to locate the cones & Axle Shaft gears but it is the 2 Spiders that I need. The 2 that originally came with the Sure Grip are more than FUBAR. Thanks Rusty for taking time out to look around. I appreciate greatly.

Hi Gents, I'm desperately looking for the 2 Spider Gears for a 489 Cone Type Sure Grip. Cass at Dr. Diff says these parts were never reproduced, as the cone Sure Grip was never intended to be rebuilt. The Gears have 10 teeth, where as the non Sure Grip have 11. I thought I would ask here at the...

The snap ring in front of the front planet carrier on the output shaft is a selective. It is used to correct gear train end play. 904 snap rings - A&A Transmissions

It is normal for the trans output shaft to turn easily in the forward direction. When you turn in reverse you are turning against the Sprag in the rear of the case which makes it harder to turn. If you need to give it a bunch more gas to move in reverse, then I think you may have issues with...

Sure sounds like the TC wasn't seated when the transmission was bolted to the engine. Here are 2 photos of a correctly seated TC in a 904. The second photo shows the measurement (in millimeters) from the starter ring gear to the bell housing flange. Hope it helps for future installation.

Wow! Those clutches have seen some excessive heat. A typical result of a maladjusted throttle pressure (Kickdown) linkage/cable. As CFHJ stated, put in 5 thin frictions in the rev/high clutch drum along with Kolene steels. If you are going to run at high RPM, a reverse wound front clutch return...

Quite easy to determine if your 904 has a single or double wrap band. Look at the rear of the case on the passenger side. If there are 2 strengthening ribs above the low/reverse piston bore, you have a double wrap band. If these ribs are not there you have a single wrap band.

Here's one that caused a bit of a headache. The crack only showed up after a Dye-Pen Test.

5333 is a build date of Thursday March 4th 1976. I have the number 398866 for a 318/360 727 Long Extension.

8720 = build date Wednesday June 12th 1985 7883rd Transmission built that day

While you're in there it might be worth checking the condition of the engine mounts especially the drivers side one & also the transmission mount on the tail shaft housing.

Put a squirt of ATF in from a syringe before applying the air pressure. This normally helps seal things up.

Thrust Washers for the 904 are dependant on wether you have alumimium or steel planetaries. The washers look very similar but the tangs are oriented differently.

I aim for .012 - .015 clearance per Clutch Plate in the Rev/High Drum. So if you have 5 frictions in there total clearance between the snap ring & pressure plate would be .060 -.075 if using a flat snap ring as opposed to a wavy one. In the forward clutch I aim for .010 - .012 per friction as...

I would stay with the 904. Its lighter & draws less parasitic power than the 727. If built with quality parts with attention to tolerances, it will handle anything a 340 can throw at it. Plus you wont have to change the drive shaft.