1967 C10 with TH400 ???

[Lost in the 60's]

I picked this up last March as a weathered field truck and haven't really looked it over closely. I am starting to buy parts to get it on the road this summer and knew something with the column indicator was broken. I was told it was originally a 6 cylinder Power Glide truck.
Unfortunately, someone broke the left door glass to STEAL the friggen glove box door, the ONLY thing missing from the interior. So nothing to know how it was built.
All the engine mounts were missing too, so I procured them to install a high performance 292 I had built with a TH350 trans.
So today I was in the unheated back shed for another reason and thought to look at the indicator. When I wiped untold years of dust off of it, I was stopped in my tracks to see it had L1 L2 D on it ???
I know it could have been changed over the years, but would a TH400 have been used behind a 292 ??? I didn't get the driveshaft either, so nothing there to indicate a 400 input yoke. This truck is about as original as any I've seen/owned and I've had a bunch over the years, so I think this is the original indicator.
Oh, yeah, the part that I need is the head that is screwed onto the column cup that moves. In medium blue, please...

Now that I wrote all this, cobwebs are vibrating. I remember when I threw the 292/350 in to get them off the floor, the trans mount did not line up with the crossmember....hmmm. I THINK the member was too far back and I just "assumed" it was out of place from the removal process. Now I have to go back out and look at this closer...

[LockDoc]

-
You should be able to move the trans cross member to where you need it. It may line up with holes already there.

So you need the gear indicator housing and lense?

LockDoc
.

[Accelo]

If your question is "was the THM 400 an option in the C10", it was not.
Although the 400 was produced starting in 1964. Only tow optional automatic the PG (M35)and the THM 400 (M49) in 1967. The standard transmission was the Three on the tree. Below is a summary of the optional transmissions. (Corrected posting)

[Bigdav160]

It says M49 above. That wasn't the 3 speed auto?

[jocko]

yes, TH400 was available on a 67 C10 with standard or optional engines.

[Lost in the 60's]

Originally Posted by Bigdav160

It says M49 above. That wasn't the 3 speed auto?

Originally Posted by jocko

yes, TH400 was available on a 67 C10 with standard or optional engines.

Yes, appears that way to me too. From everything I know, Chevrolet was developing the TH350 in '67, but never released it for production until 1968.
Shift indicator.



It's the pointer that's broken....



This crossmember has never been removed. It would have been for the long tail housing 400 trans.





No witness marks to support the theory that it had been moved back.

[kwmech]

The only difference in length between the 350 and 400 is about 2''. Your pic indicates about 10.

[chevmn]

2 auto trans available in 67... both Powerglide, and TH400. TH350 started in 68, but 400 still available in big block and probably heavy duty trucks. I had a 67 that came factory with 327 and TH400. While I was on its 4th engine, the TH400 was still going strong with no real attention. So if someone ordered the 3 speed auto, it was a TH400. My guess is the 292 with TH400 would have been a pretty decent combination, as I know the 292 was arguably one if the best 6 cylinders built.

[Lost in the 60's]

Originally Posted by kwmech

The only difference in length between the 350 and 400 is about 2''. Your pic indicates about 10.

The tail housing on the full size cars was longer and I believe that is what was in the trucks too. I've had several '69-70's with 350/TH400 trans.

[kwmech]

As I have also, but I've never seen a truck with that housing, always the short 4'' tail piece. I have seen the tail piece we are talking about on the 70's station wagons. AND the tail piece is molded TH375 and has a 27 spline output shaft. Also the cushion was not on the very back of the tail housing. It is on the rear of the case where the tail housing bolts. So with that being said it still comes down to just about the only thing that could bolt in that far back from the factory would be a TH400. It's a mystery to me, unless it's just a '67 thing.


With all that being said. When I got my 69 GMC 1 ton, it had a t400 in it. NO PARKING pawl in the trans and no park indicator on the column--- R N D L L1. The parts were stripped out of the case. Your only option was to put the vehicle in reverse? and make sure the parking brake was set

[68350]

Th400 was the only 3 speed automatic in trucks until 1969, then the th350 was used for 6 cylinder and small block applications.

[Lost in the 60's]

Originally Posted by kwmech

As I have also, but I've never seen a truck with that housing, always the short 4'' tail piece. I have seen the tail piece we are talking about on the 70's station wagons. AND the tail piece is molded TH375 and has a 27 spline output shaft. Also the cushion was not on the very back of the tail housing. It is on the rear of the case where the tail housing bolts. So with that being said it still comes down to just about the only thing that could bolt in that far back from the factory would be a TH400. It's a mystery to me, unless it's just a '67 thing.


With all that being said. When I got my 69 GMC 1 ton, it had a t400 in it. NO PARKING pawl in the trans and no park indicator on the column--- R N D L L1. The parts were stripped out of the case. Your only option was to put the vehicle in reverse? and make sure the parking brake was set

I'd like to see a pic of an original TH400 in a '67 to know what it looked like.
This is my last '69 C10 350/400 By the holes in the frame, that c/member is further forward than my '67...

[chewychevy67]

All 65- 67 th400 pans look like this with the horseshoe imprint and dimple for the 65-67 only filter. I added the drain and temp sender. 68 up use a different filter style and the pan looks smoother like the 69 above

[Lost in the 60's]

Chewy, in this pic, it appears my c/member is in the 5th and 6th holes back from the left, front cab mount. Where is yours to compare ?

[chewychevy67]

Mine are in these holes in these pics. My truck is at the metal shop so I can't check. I added a gear vendors but the bracket does not move. Also my engine v8 mounts are in the front holes. Before and after pictures.

[Lost in the 60's]

Your c/member appears further forward than mine... I have another '67 here with a 250/Sm465 and looked under that to compare. C/member is forward of the transmission. Looks like the old style bellhousing with the mounts on it. Too dark in that shed to see clearly.
This is starting to bug me now, why the roller is so far back. Seems like a lot of work to move it back and put all the bolts back in and tight just to move it ???

[old51sedan]

Originally Posted by Lost in the 60's

I picked this up last March as a weathered field truck and haven't really looked it over closely. I am starting to buy parts to get it on the road this summer and knew something with the column indicator was broken. I was told it was originally a 6 cylinder Power Glide truck.
Unfortunately, someone broke the left door glass to STEAL the friggen glove box door, the ONLY thing missing from the interior. So nothing to know how it was built.
All the engine mounts were missing too, so I procured them to install a high performance 292 I had built with a TH350 trans.
So today I was in the unheated back shed for another reason and thought to look at the indicator. When I wiped untold years of dust off of it, I was stopped in my tracks to see it had L1 L2 D on it ???
I know it could have been changed over the years, but would a TH400 have been used behind a 292 ??? I didn't get the driveshaft either, so nothing there to indicate a 400 input yoke. This truck is about as original as any I've seen/owned and I've had a bunch over the years, so I think this is the original indicator.
Oh, yeah, the part that I need is the head that is screwed onto the column cup that moves. In medium blue, please...

Now that I wrote all this, cobwebs are vibrating. I remember when I threw the 292/350 in to get them off the floor, the trans mount did not line up with the crossmember....hmmm. I THINK the member was too far back and I just "assumed" it was out of place from the removal process. Now I have to go back out and look at this closer...

When I bought my 69 it came with the original 250/350 trans. The motor was tired so I rebuilt a 292 and installed it with a 200-4R. To do this I had to move the trans crossmember back about 5" to I believe the last set of holes. The drive shaft went back with no modifaction. The transmission indicator was the same as yours, I just changed it to a 4 speed indicator.

[Lost in the 60's]

Originally Posted by old51sedan

When I bought my 69 it came with the original 250/350 trans. The motor was tired so I rebuilt a 292 and installed it with a 200-4R. To do this I had to move the trans crossmember back about 5" to I believe the last set of holes. The drive shaft went back with no modifaction. The transmission indicator was the same as yours, I just changed it to a 4 speed indicator.

Yes, the 200r4 is a direct swap with a PG/TH350. I have 1 in my '38 street rod and had another in a '62 Impala I recently sold. Great transmissions when built right with aftermarket and Corvette parts. A buddy has 1 behind a 450hp LS6 crate motor and it is doing just fine.