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454 Swap

that could be it but before i went replacing pumps I would pull the torque converter and fill it with fluid. Not putting fluid in it would cause it to act like it was in N even though it was in D. Same thing when you dont fill the tranny enough.
 
I agree. It should take over two gallons of fluid (at least) to fill up a trans/torque converter that's totally empty. I accidently ran mine about one or two quarts low before and it would not back up hardly at all. It would go into reverse, but it seemed to be slipping or something. I thought I had some serious problems, but I put some more fluid in and now it does just like it's supposed to. Automatics can be tricky.
 
If the transmission was working fine before then its possible that either you didnt bolt up the converter to the flywheel:rolleyes:, or because the converter could be defective, or its completely empty and you need to put fluid in it first.

Hey , did you take any pics of your swap ?
 
Did not take many pictures during the actuall swap but have some pretty good before and after pics with the front clip off and I'm more than willing to help anybody with questions they may have.

THe torque converter is bolted up, the fluid that was in the converter was the only tranny fluid lost and I've added 6 quarts and it shows full. The fact that I could add 6 quarts without draining the tranny makes me think that the converter has filled. However when installing the engine I put the convertor on but didnt have it slid on all the way. THen I put the engine in and when I went to bolt it up to the tranny it didn't like up. I had to take the engine back out and push the convertor ALL the way onto the pump. After that incident it bolted right up. But having put it on incorrectly do you think I could have damaged the pump?

Tonight I'm going to take the cooling line off the radiator and turn it over and see if I can see/feel/hear any pumpage going on.
 
The six quarts sounds to me like how much the trans would hold without the fluid that the torque converter will hold. The TC should have another three or four, I think. It should be going into gear though, even if the converter isn't full. Is your linkage all hooked up right?
 
The1980BEAST said:
Did not take many pictures during the actuall swap but have some pretty good before and after pics with the front clip off and I'm more than willing to help anybody with questions they may have.

THe torque converter is bolted up, the fluid that was in the converter was the only tranny fluid lost and I've added 6 quarts and it shows full. The fact that I could add 6 quarts without draining the tranny makes me think that the converter has filled. However when installing the engine I put the convertor on but didnt have it slid on all the way. THen I put the engine in and when I went to bolt it up to the tranny it didn't like up. I had to take the engine back out and push the convertor ALL the way onto the pump. After that incident it bolted right up. But having put it on incorrectly do you think I could have damaged the pump?

Tonight I'm going to take the cooling line off the radiator and turn it over and see if I can see/feel/hear any pumpage going on.
Click to expand...

Also make sure your transfer case did not get bumped out of gear, it might be in the nuetral position.
 
Yeah I had previously thought of the t-case being in Neutral, it wasn't.

I pulled the line off the radiator fired her up and it shot out a pint in 5-8 seconds....maybee not a whole pint but you get the point. The front pump is not broken. I think I just have the wrong torque converter. Went to O'Reilly's today they sold me PRO GM3 which shows for a TH400. I've got the specs for it if anyone knows what the specs are on a TH350.

Also how do I know if its a lock up or not. Someone said something about there being an electrical plug on the drivers side. There is a wire but I thought it was for reverse lights?

Specs for torque convertor-
1.704" Pilot
11.5" Bolt circle
13" Diamater
3 Lug pattern
3 rows of ribs on primary
30 spline
non-lock up
slotted hub
TH400
I believe it also said TH350 on the website but the part he had pulled up didn't have it listed.


Could this be the mysterious problem?
If so....DAMN IT! I get to pull the engine again!
 
Except for diesel, and specific TH400 towing applications, the T350/T400 convertors interchange.

I don't think the diameter of the internal splines are the same for the T350/T350C...the lockup type trans has an electrical connector above the shifter shaft on the drivers side of the trans case.
Were you able to free spin the convertor before bolting it up to the flexplate?
 
I don't think so, cause we had to turn the engine to get the flywheel to line up with the bolt holes. But I'm not sure its a lock up. It has one wire more towards the center and little further back from the shift linkage.
 
Ok figured out I have a damn lock up transmission. Heres the deal, I have a lock up torque convertor but the bolt pattern is 10.5" while the flexplate I have for the 454 and all 454 flexplates I can find come in a 10.75"-11.5" bolt pattern. Any ideas?
 
I"m pretty sure You can use the flexplate from your 350 with an external balance plate. I really depends on what year the 350 was though. May be a good option if you truly can't find a replacment flexplate that would fit.

I just bought one to use with mine but I had to get a flywheel because the cranks were different. (one piece/two piece rear main.) Want to buy one? ::rolleyes:
 
The1980BEAST said:
Ok figured out I have a damn lock up transmission. Heres the deal, I have a lock up torque convertor but the bolt pattern is 10.5" while the flexplate I have for the 454 and all 454 flexplates I can find come in a 10.75"-11.5" bolt pattern. Any ideas?
Click to expand...

GM flexplate part number 10185034 fits 1991-up and has a 10.4" convertor bolt pattern and is a 14" diameter with 168 tooth count.
 
4X4HIGH said:
GM flexplate part number 10185034 fits 1991-up and has a 10.4" convertor bolt pattern and is a 14" diameter with 168 tooth count.
Click to expand...
:bow::bow::bow:

This might be a stupid question but would this work even if its a 10.4" convertor bolt pattern? I'm assuming thats why you posted it
 
Also noticed its a 1 piece rear seal, I believe mine is a 2 piece...does that matter?

Putting it on a 85 454
 
What trans are you dealing with? The reason i ask is because there is no such convertor bolt pattern of 10.5". Your choices for a SBC would be 9.75", 10.75", 11.5" and for a BBC your choices are 10.4", 11.5", or 11.75"

Maybe you're measuring incorrectly? You need to measure from the center hub of the convertor to the center of one of the bolt pads.
 
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