The Ford Barn

Jack 34pu · 09-13-2013, 12:14 PM

Which Ford mid 80's RTS 4sp transmission is used in the Model A conversion? 2wd - long tail shaft or 4wd - short tail shaft?

CarlG · 09-13-2013, 12:38 PM

PM sent

AL in NY · 09-13-2013, 04:13 PM

Do a search on F150 4-spd and you'll find all the information you need.

partridgekelley · 09-14-2013, 11:46 AM

I have an 85 f-150 trans in my 29 tudor, it looks like they made a new part where the tail shaft bolts on the trans. It is a piece of aluminum about 1" thick and the u-joint cover (back half) bolts to the aluminum part. The driveshaft and torque tube have been shortened about 1.5" .
It is a great set-up. I did the change so my wife could drive the car. I have a Mitchell O/D in my 28 ccpu , but I drive the truck. I would say go for it to anyone wanting to make the change.

Ron W · 09-14-2013, 07:51 PM

'84 - '87 will work from 2wd or 4wd. I have done one of each. I think the codes to look for are; AD, AE, AJ, BJ, BP, BU, BV, BZ, or CS but check ratio before purchaseing. Turn input shaft 10 revolutions and look for 12.6 rev.s on the output shaft. Ron W

kenparker · 09-14-2013, 08:24 PM

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The 4wd has the "boss" for the speedometer drive gear is a different place. 2wd is easier conversion when cutting the new splines on the shortened tailshaft.

Ron W · 09-15-2013, 10:33 AM

Jack 34pu, Ken Parker is a good guy to talk to if you would like to buy a kit or if you have questions. He helped me a lot! AL in NY also knows a lot about them. Ken, good to hear from you. When I cut the splines on the short output shaft, I put the hole between the splines and it almost disappears. Doesn't hurt anything. I just sent you an e-mail with a picture. Ron W

QGolden · 09-15-2013, 11:07 AM

One of the better threads on this subject here, it also has some good links embedded in it.

http://fordbarn.com/forum/showthread...highlight=f150

09-13-2013, 12:14 PM	#1
Jack 34pu Senior Member Join Date: May 2010 Location: State College, PA Posts: 362	RTS 4 sp trans info needed Which Ford mid 80's RTS 4sp transmission is used in the Model A conversion? 2wd - long tail shaft or 4wd - short tail shaft?

09-13-2013, 12:38 PM	#2
CarlG Senior Member Join Date: Nov 2010 Location: Anchorage, Alaska Posts: 9,115	Re: RTS 4 sp trans info needed PM sent __________________ Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club

09-13-2013, 04:13 PM	#3
AL in NY Senior Member Join Date: May 2010 Location: Southern Upstate New York Posts: 1,160	Re: RTS 4 sp trans info needed Do a search on F150 4-spd and you'll find all the information you need. __________________ AL in NY

09-14-2013, 11:46 AM	#4
partridgekelley Senior Member Join Date: May 2010 Location: Fort Bragg,Ca. Posts: 362	Re: RTS 4 sp trans info needed I have an 85 f-150 trans in my 29 tudor, it looks like they made a new part where the tail shaft bolts on the trans. It is a piece of aluminum about 1" thick and the u-joint cover (back half) bolts to the aluminum part. The driveshaft and torque tube have been shortened about 1.5" . It is a great set-up. I did the change so my wife could drive the car. I have a Mitchell O/D in my 28 ccpu , but I drive the truck. I would say go for it to anyone wanting to make the change.

09-14-2013, 07:51 PM	#5
Ron W Senior Member Join Date: Jan 2011 Location: Central Me. Posts: 260	Re: RTS 4 sp trans info needed '84 - '87 will work from 2wd or 4wd. I have done one of each. I think the codes to look for are; AD, AE, AJ, BJ, BP, BU, BV, BZ, or CS but check ratio before purchaseing. Turn input shaft 10 revolutions and look for 12.6 rev.s on the output shaft. Ron W Last edited by Ron W; 09-14-2013 at 07:59 PM. Reason: additional info.

09-14-2013, 08:24 PM	#6
kenparker Senior Member Join Date: May 2010 Location: Van, Texas Posts: 1,122	Re: RTS 4 sp trans info needed Sponsored Links (Register now to hide all advertisements) The 4wd has the "boss" for the speedometer drive gear is a different place. 2wd is easier conversion when cutting the new splines on the shortened tailshaft.

09-15-2013, 10:33 AM	#7
Ron W Senior Member Join Date: Jan 2011 Location: Central Me. Posts: 260	Re: RTS 4 sp trans info needed Jack 34pu, Ken Parker is a good guy to talk to if you would like to buy a kit or if you have questions. He helped me a lot! AL in NY also knows a lot about them. Ken, good to hear from you. When I cut the splines on the short output shaft, I put the hole between the splines and it almost disappears. Doesn't hurt anything. I just sent you an e-mail with a picture. Ron W

09-15-2013, 11:07 AM	#8
QGolden Senior Member Join Date: Sep 2011 Location: Alton, NH Posts: 1,231	Re: RTS 4 sp trans info needed One of the better threads on this subject here, it also has some good links embedded in it. http://fordbarn.com/forum/showthread...highlight=f150 __________________ It's not what people think they know that will hurt them, it is what they think they know that aint so! -Mark Twain. It is the very things that we think we know, that keep us from learning what we should know.- Unknown