need non tractor help with a Dodge pikcup

37 chief · Oct 16, 2023

I have a 80 Dodge pickup with a slant 6. The transmission is bad. I have a 78 Dodge pickup with a 318 v8 engine and a good transmission. Will the v8
transmission bolt up to the slant 6 motor? Thanks Stan

560Dennis · Oct 16, 2023

Automatic or standard shift

RandyC · Oct 16, 2023

Its been a long time since I worked on them I think it will work you may have to change the mount. I can't say 100% it will work but if my memory says it will work. I suggest to measure the spacing on the transmission before you start. Wish I could tell you for sure.

roy prins · Oct 16, 2023

Does it have an automatic tranny? If it does I think it will .To be sure check with Your salvage yard nearby. Roy

37 chief · Oct 16, 2023

I forgot the main thing. Both are automatic transmissions. stan

37 chief · Oct 16, 2023

Auto trans. Stan

geok · Oct 16, 2023

This post was edited by geok on 10/25/2023 at 07:28 am.

thehickdaddy · Oct 16, 2023

Are both the same model of auto trans?

Could be 727 or 904

Yes they should interchange.

Early 60s had some different crankshaft lengths.

But a 78 to an 80

And both small block, should be just fine

Long live the leaning tower of power

Dave in NY · Oct 16, 2023

I am certain that a slant 6 auto trans and a 318, or small block auto trans are not interchangeable. The mounting patterns are different where they bolt to thier respective engines. This I know from many years of wrenching on the older mopars of the 60s-70s-80s vintage. If you lived close to me I would rebuild it for you, providing it is isn't too burnt up to put a kit in it. You'll have to get it to a reputable trany shop or get a used one from a salvage yard. Or just swap the 318 and trany into the good truck. As long as you have all the pieces in a donor truck it wouldn't be a terribly hard job. Just my 3 cents worth..

jimg.allentown · Oct 16, 2023

No, they will not interchange. The slant 6 has the starter mounted high on the right side while the 318 has it mounted low.

560Dennis · Oct 16, 2023

Were they called slant hemis?
Good engine
Ran (remembered ) them in sportsman dirt oval.

Destroked 450 · Oct 16, 2023

V8 trans will not work on a slant 6
Bolt pattern is different and starter locations are different

Pete76NYPa · Oct 16, 2023

So the 318 truck probably has a 727 Torqueflite, the Truck with the slantie probably does not, but they make relatively inexpensive mounting kits for that purpose.

4play · Oct 17, 2023

No V8 box will bolt to a slant. All slant engines have the same exclusive pattern. Mopar V8 patterns are split between small blocks and big blocks, or A/LA's & B/RB's )

caterpillar guy · Oct 17, 2023

Starter location will prevent the transmission from bolting up. The block casting is where the problem will be. they made a hollowed out spot in the cast block and the v8is down lower like along the oilpan if you try to put the v8 trans to the 6 look at that first. And to put the v8 in the 6 frame takes some doing also. I put a 273new style engine in a Valiant once where a slant 6 had been. needed to raise the mounts to clear the frame with the oilpan and then had to make the mounts as regular mounts were to short. I used angle iron welded into a box then drilled the holes for the mounts to bolt up to the steel plate on the engine the mount would have bolted to. I put a piece of old tire tread between them for the vibration and cushion. Also had to make a new exhaust on it since it needed either dual exhaust or a cross over for it. I made the dual exhaust from straight pipe by cutting it then welded after the pipe was turned to fit the angle needed. This was on a 3spd stick. Seems to me I had to make a change to the clutch linkage too. This was all back 40 plus years ago now so might have forgot some of the details too.

ASEguy · Oct 17, 2023

It's the way the crankshafts are balanced. One is internally balanced, and the other is externally balanced making the parts different.

Geo-TH,In · Oct 17, 2023

Johnny Cash did it with the proper A-dapter.
Oh wait, that was a Cadillac.

Texasmark · Oct 17, 2023

You can have a machine shop build you an adapter if they have a blueprint of the mating surfaces. When I was a teen I had a friend's dad who owned a MS and that was his forte!

4wdtom · Oct 17, 2023

A friend had a maybe 65 van with a slant 6 and a heavy duty auto, think it was the 727. As I remember there was a factory adapter between the engine and the trans.

olgentdc · Oct 17, 2023

I live near Louisville 37 Chief , so unless You got someone this way I cant help much ,,. Not You will want to kik my tail All the Same ,,. I have run over with a bush hog accidently a 3 speed overdrive that was bolted to a slant 6 in a 85 D-100 pikup .ctacked the aluminum case and knocked a hole thru the side ,,. Perhaps the inner workings were good until that happened ,,..Surely A transmission Shop has a replacement ,,.. Try JASPER ENGINES , they have transmissions too

need non tractor help with a Dodge pikcup

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