Th400 build thread.
#41
You mean it does not have a sprag on the direct drum.
Has a roller clutch on the on the reaction carrier, most do, except 1964 and 1965 th400's. I used to run a 36 element sprag there, found a low mileage reaction carrier. Usually 1965 and low mileage don't exist these days. I don't know that the roller clutch there is a high failure item.
You're right about keeping the 32 spline output. You're going to need a counter bored yoke (not yolk). Makes no sense to track down a 28 spline output shaft and extension housing.
Has a roller clutch on the on the reaction carrier, most do, except 1964 and 1965 th400's. I used to run a 36 element sprag there, found a low mileage reaction carrier. Usually 1965 and low mileage don't exist these days. I don't know that the roller clutch there is a high failure item.
You're right about keeping the 32 spline output. You're going to need a counter bored yoke (not yolk). Makes no sense to track down a 28 spline output shaft and extension housing.
#42
Think it's necessary to bolt the yoke to the output shaft? I ask because the yoke was seized to the output shaft and I had to impact it off and in the process jacked up the threads beyond repair. It seems you know transmissions fairly well, so what do you set your forward and direct clutch clearances to? Sorry bout all these questions, but I'm definitely a noob with transmission internals.
As the rear suspension moves up and down the yoke moves in and out of the transmission. On a truck the slip yoke is in the middle of the driveshaft, thats why the yoke can be bolted on.
With a th400 I'd set all the clutches to .040 or close, it's not like a 4L60E where clutches come on and release during some shifts. On this trans you don't have to worry about shift overlap. Forward is always on when it's in drive so it can vary quite a bit and be ok.
I'd also leave all the waved plates in.
#43
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Last edited by FTICONVERTERS; 12-13-2016 at 08:18 AM.
#44
Ok, so I got the case, pan and pump cleaned up today. Pulled the pump apart and the gears looked fine. I'm not sure if it's good practice to replace as needed, or just do it anyway since I'm already here. Thoughts?
#45
Ok, haven't done anything with the car for the past couple of weeks. Reason is, it was playing time AKA vacation. Below had been my scenery. So I came back home with renewed interest in the car, planned to bang out this Th400 tonight.....and hit a snag. Transmission store sold me the wrong torrington bearing, and stopped me in my tracks. Should be able to finish up by tomorrow. This has been dragged out far too long, and now I'm itching to get the car back in action.
#46
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I've been in the business for 40 years. This requires a phone call. There are myths and mistakes from so many. This should only be about doing the trans the right way.... Not about the money.... I am offering you some valuable info... Because i love the job....
Pm me for my number.... Brian
Pm me for my number.... Brian
#47
I've been in the business for 40 years. This requires a phone call. There are myths and mistakes from so many. This should only be about doing the trans the right way.... Not about the money.... I am offering you some valuable info... Because i love the job....
Pm me for my number.... Brian
Pm me for my number.... Brian
#49
Another 'n T400.
#57
Expensive flywheel and yet.....
So, I had planned on finally starting the car today to see if this transmission works. Went to bolt up the converter, but found the holes to be too small. Now Just on principle alone I feel that an expensive sfi flywheel should not require any customization whatsoever....no, its not the end of the world but still. Opinions?
#59