Hey guys, I have a lead on a transmission that came off a 401 Story is. I made a post on FB looking for a st400 This dude claimed its a t400 off a nailhead and std I know nothing of these transmission So I'm including pics to see if any of you gents can help me. Firstt pic in the trans 2nd is the trans bolted to the engine Please tell me. It's not a dynaflow
It's not a Dynaflow. Looks like an ST400. That looks like a Rivi GS color. Ask if the ID plate is still on the side and if it has the "BS" code. And what is the status of that motor? (drooling, just ever so slightly...) Year? (it looks like a Switch Pitch input shaft with the oil hole) So, I am thinking it is a 1965.
Apparently water got in It and seized it I asked him for the 2x4 intake, No dice he's gonna use it on a diff project I would of took the whole thing but I already have a seized 401 And a 425 that I'm. Building up
Looks fixed pitch to me. The stator splines on a SP are much shorter. http://www.v8buick.com/index.php?threads/vp-converter-trans-visual-id-guide.143723/
Looks to me like a '64 TH400. See if the selector shaft is welded onto input shaft & if the electrical connector on the side has a single or double wire connector.
Thanks, Larry and Tom. I stand corrected guys. On my laptop at home, the shaft "appeared to be fatter" but now I see it is narrow.
Mike, I was looking at the stator splines. The Switch Pitch splines (on the right) are 1/2 as long as their Fixed Pitch counterparts. (on the left)
I see that in those pics, but I was not sure due to the angle on the image at the top and looking with my old man eyes too late at night and the shaft looked thicker, but then looking at it on my ginormous screen at work, I see it was an optical delusion. At least it's not a Dynaslow.
Well Larry the wizard. You know your stuff. Here's a better pic Its the one on the left (in your pics)
If you look at the pictures, the second set of splines are for the torque converter stator. The switch pitch stator splines are 1/2 the length of the fixed pitch splines. That is one way to tell the difference between the 2 transmissions. Not sure if you know what a Switch Pitch is, not everybody does, but Buick guys are usually in the know Just in case, here is a description. http://www.buickperformanceclub.com/switchpitch.htm
The splined area on the shaft is different length between the switchpitch and the fixed pitch. (1) The shaft width is different is different length between the switchpitch and the fixed pitch. (2) Larry posted faster than me, I was still scribbling with my crayons...
Thanks guys. One last dumb question What would be the best torq converter /stall be for this trans /425ci? (I'm still learning on the fly with the Nailhead)
The torque converter selection is based on total combination. A stock converter works great with a stock engine. If you install a hotter cam, things can change. The best converter will be the purpose built one for your exact combination. The converter builder will need engine HP/TQ, gearing and car weight to build the best one for you. That doesn't come cheap like some off the shelf ones. Jim Weise sells some really nice converters and he knows Buicks. I recommend you contact him when you are ready. http://www.v8buick.com/index.php?threads/tsp-9-5-street-strip-converters-lifetime-warrantee.147066/
