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Transmission options #735899
May 04th 2018 7:51 am
May 04th 2018 7:51 am
Joined: May 2018
Posts: 11
Wichita, Ks
Erkblack Offline OP
stranger
Erkblack  Offline OP
stranger
Joined: May 2018
Posts: 11
Wichita, Ks
Was planing on doin a whole drive train swap. But now the more I drive Min Bull around the more I'm ok with the power it has. But I really don't like the three speed trans. The one know of a four speed/ over drive trans that can be swapped in to a 83 b-150 with a slant six?


Oi
Re: Transmission options [Re: Erkblack] #735900
May 04th 2018 8:08 am
May 04th 2018 8:08 am
Joined: May 2018
Posts: 237
TN
Astrocreep66 Offline
enthusiast
Astrocreep66  Offline
enthusiast
Joined: May 2018
Posts: 237
TN
If you lived in Nashville I got the hot ticket, Built leaning tower of power with 904 auto,Clifford research intake and headers with Weber,shaved head 268 comp cam,sitting in my shop...lol

Attached Files 20180128_093625_1517156903690.jpg

When in doubt..get the sawzall out..
Re: Transmission options [Re: Erkblack] #735904
May 04th 2018 8:56 am
May 04th 2018 8:56 am
Joined: Mar 2016
Posts: 326
Tucson,Az.
H
Hasan Ben Sobar Offline
enthusiast
Hasan Ben Sobar  Offline
enthusiast
H
Joined: Mar 2016
Posts: 326
Tucson,Az.
Rear gear must be considered. Just a 4 speed swap will actually hurt mileage.


Tucson-it's a dry heat...like an oven
Re: Transmission options [Re: Erkblack] #735995
May 05th 2018 9:11 am
May 05th 2018 9:11 am
Joined: May 2018
Posts: 11
Wichita, Ks
Erkblack Offline OP
stranger
Erkblack  Offline OP
stranger
Joined: May 2018
Posts: 11
Wichita, Ks
@astrocreep66 is is 4 speed? Electric or hydraulic controlled over drive?
@hasan Ben sober the 3 speed a727( 36rh later 37rh) the the later a518 ( 46rh) have the same gear ratios 1-3 but fourth in the a518 has a gear ratio of .69 to improve gas mileage and increase cruising speed on high way.

What I really need to know is if these trans have the same bell housing bolt pattern? Since the a727 was used on slant six, 60s-70s hemis and power wedge motors. Then the a518 replace that trans completely when dodge dropped the slant six then went to v8 and v6 engine only in the 80s



Oi
Re: Transmission options [Re: Erkblack] #736001
May 05th 2018 11:31 am
May 05th 2018 11:31 am
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
Reed Offline
Maniac
Reed  Offline
Maniac
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
There were several factory four speed manual transmissions (overdrive and non-overdrive) available behind the slant six over the yesrs. However, there was never a factory four speed automatic available for the slant. The A500/518 transmissions have a smallblock engine bolt pattern which is different than the slant six bolt pattern.

Prior to 68, when the slant six was mated to a 727 it was a smallblock trans connected via a factory adapter plate. In 68 the slant got its own 727 with the slant six bolt pattern and the adapter plate was dropped. If you can find an old adapter plate, you can use it to mate an a500 or 518 to the slant.

If you need more info about a manual four speed swap, check out www.slantsix.org


Windows- they're what make a van worth owning!
Re: Transmission options [Re: Erkblack] #736057
May 07th 2018 9:08 am
May 07th 2018 9:08 am
Joined: May 2018
Posts: 11
Wichita, Ks
Erkblack Offline OP
stranger
Erkblack  Offline OP
stranger
Joined: May 2018
Posts: 11
Wichita, Ks
thanks reed. thats what i needed to know


Oi
Re: Transmission options [Re: Erkblack] #736061
May 07th 2018 9:34 am
May 07th 2018 9:34 am
Joined: Mar 2016
Posts: 326
Tucson,Az.
H
Hasan Ben Sobar Offline
enthusiast
Hasan Ben Sobar  Offline
enthusiast
H
Joined: Mar 2016
Posts: 326
Tucson,Az.
You can't just toss a OD tranny in a vehicle and expect good results. If cruising speed is below where the rpm where the timing curve is in , you'll actually get worse MPG's than with just a 3 speed. OD needs gears that are 3.55 or higher (numerically)


Tucson-it's a dry heat...like an oven
Re: Transmission options [Re: Erkblack] #736063
May 07th 2018 10:58 am
May 07th 2018 10:58 am
Joined: May 2018
Posts: 11
Wichita, Ks
Erkblack Offline OP
stranger
Erkblack  Offline OP
stranger
Joined: May 2018
Posts: 11
Wichita, Ks
reed. i just reread your post. i want to stick with an automatic, but want to upgrade to a four speed


Oi
Re: Transmission options [Re: Erkblack] #736073
May 07th 2018 3:44 pm
May 07th 2018 3:44 pm
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
Reed Offline
Maniac
Reed  Offline
Maniac
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
In that case, you will need to either track down the 60s era adapter package to mate a smallblock trans to a slant six, or use an adapter plate to mount a brand X transmission to the slant. People have done GM transmissions (I think a 700R4), and I think GM would probably be the best way to go. The factory adapter plate is kind of hard to find because you need the plate and the spacer and the special bolts for it.


Windows- they're what make a van worth owning!
Re: Transmission options [Re: Hasan Ben Sobar] #736539
May 21st 2018 8:06 pm
May 21st 2018 8:06 pm
Joined: May 2007
Posts: 9,790
On Route 66 in Bethany Oklahom...
Uncle_Fester Offline
Festerus Vannimus
Uncle_Fester  Offline
Festerus Vannimus
Joined: May 2007
Posts: 9,790
On Route 66 in Bethany Oklahom...
Originally Posted by Hasan Ben Sobar
Rear gear must be considered. Just a 4 speed swap will actually hurt mileage.


Like Hasan Ben Sobar said, rear end gears MUST be considered. If you have a slant 6 with three speed auto and 3.55:1 rear gears and then throw at A500 OD trans at it, your final drive ratio will be too low and will most likely hurt your MPG rather than help it. . .


My van :
1991 Dodge B-250 (Junk Yard Dawg)
5.2 tbi V8, auto trans, and junk yard parts....


Founder & President of Sooner or Later United Truckers and PROUD TO BE A S.L.U.T. ! !
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