Troubles with a 400 behind a 472

[Ronnie4wd]

My friend Mackan is having troubles with his 2wd 400 who is behind his 472 in this thing

Now we are thinking about a stick for that one too.
Is it easy or does it take alot of effort to put a 465 in there behind the caddy 472
The troubles with the 400 is that the PO messed with it and now there is nothing to do about it.
Caddy transmissions are hard to find here.

 

[Randy92782]

i think the most effort is going to be gettin your pedals and shifting rods/linkages fabbed in there

 

[bowtiepower00]

Why not go through the TH400? Properly built and with a good cooler, you're not going to blow one up.

 

[Randy92782]

Why not go through the TH400? Properly built and with a good cooler, you're not going to blow one up.

that's a much better option

 

[rcamacho]

Or a TH475. I hear the straight cut gears are stronger.
http://www.txchange.com/TH400TM.htm

 

[AJMBLAZER]

I know there's the import taxes you guys have to pay but over here you can get an adaptor to go between the BOP engine and a regular Chevy pattern transmission for less than $100 last I looked. JEG's had them last I knew.
That way you could run a Chevy pattern 2wd TH400 which has got to be more common than the BOP style.


Oy...I think it's on here...I think...but somebody put a SM465 behind a 500 and it involved an amount of custom work because the 500/472/425 family never came with a manual tranny.

 

[dremu]

As long as the bellhousing/case is intact, you could swap the guts from a Chevy TH400 into it, I believe, as the bellhousing is the only part that's different for the Caddy. Or rebuild the one you have, unless the case is broken or something?

-- A

 

[Ronnie4wd]

First of all I am not a transmission mecanic but Mackan has learned alot by reading and going thru this one and some other slushboxes.
He thinks that some of the parts do nt get in there as easy as they should .
there is some tension on some of the parts.
The bellhousing/case is intact as far as we know.

 

[tRustyK5]

The biggest hurdle to overcome putting a manual tranny behind a Caddy engine is that a hole for a pilot bushing or bearing would need to be drilled into the back of the crank.

BOP to Chev bell adaptor plates are available, and I'm sure even a flywheel could be found.

Rene

 

[smalltruckbigcid]

Well Rene's got part of it right on the crank. You will need to drill the crank for the end of the input shaft to fit into. When I drilled my 500 I did it with the engine assembled. Strangely enough its easier that way. Used a 5/16 bit for a pilot and followed it up with a 5/8 for the big size. By the way you only have to go into the end of the crank about half an inch.

You'll have to make the bronze bushing for the pilot bearing. The hardest part there will be finding the material to do it with. Then anyone with a lathe can cut it for you in 30 minutes.

Hope this helps
for a caddy flywheel try these guys
http://www.cadillachighperformance.com/HomePage.html John
http://www.mtscadparts.com/ Marty or Paul
http://www.cadillacperformanceparts.com/ Richard
Please note that the caddy flywheel will cost about $375 or so. Some enterprising people have used neutral balanced chevy flywheels and re-drilled the bolt pattern in it to fit the caddy. IF you do this and parts break don't complain to me, this is NOT a recomendation just a casual note what other people have done.
Good luck
George

 

[Ronnie4wd]

Thanks for all the info we will see wich way he goes.

 

[boz42]

for a caddy flywheel try these guys
http://www.cadillachighperformance.com/HomePage.html John

Be leary of this cat, he gave me a good screwing.

Also one not listed there that will throw you a pole is the cad company.

I had good experiences w/ Potter & Marty though, They are jam up guys.



I don't think anyone confirmed but the only difference between the chevy & BOP 400 is the bell. All parts will swap. They are not that bad to build either. I self taught myself to build mine. An ATSG service manuel (available on e-bay) is a handy guide to have if yall consider building it.

http://cgi.ebay.com/ebaymotors/aw-cgi/eBayISAPI.dll?MfcISAPICommand=ViewItem&item=180155339559 That is a link to a 400 service manuel & the guy will ship world wide. By the way t-400 is also called 3L80.