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can I put an 11" clutch and flywheel in an F150 #4464671
07/20/17 07:42 AM
07/20/17 07:42 AM
Joined: Jun 2009
Posts: 3,743
Chicago, IL
tomcat27 Offline OP
tomcat27  Offline OP
Joined: Jun 2009
Posts: 3,743
Chicago, IL
1984 F150 with the 4.9. We are increasing the engine power - the parts guide shows that Ford used a 10" clutch (which is what I have) and an 11" clutch. is it as simple as swapping the flywheel and clutch parts up to an 11"?


2019 Cherokee, 2018 Jetta, 2014 Sentra, 1995 Escort, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464683
07/20/17 07:53 AM
07/20/17 07:53 AM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
Yes, if the flywheel is drilled for it. Many 70's models were.... not so sure about '84?

If not, take it to a brake & clutch place, and they can drill&tap the holes for you.

I don't see the need.
A good 10" clutch can handle what a 300 throws at it, unless you are supercharged or something.

I'd vote for saving your money.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464694
07/20/17 08:01 AM
07/20/17 08:01 AM
Joined: Jul 2005
Posts: 30,964
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,964
NY
Yes, the OE flywheel is drilled and tapped for it. It can take a 10" or 11" clutch. IIRC you will need larger bolts for the 11" clutch, and nothing more.

I upgraded a few older 84-88 E and F-150's with the 4.9L with the stick to an 11" clutch over the years. At the time the cost was well worth it for me. It is considered HD with the 11" clutch.

I have an OE flywheel sitting in the basement for a 4.9L Ford from that ERA. I can take pics if you'd like.


God Bless Our Troops

Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464712
07/20/17 08:14 AM
07/20/17 08:14 AM
Joined: Jun 2009
Posts: 430
New England
555 Offline
555  Offline
Joined: Jun 2009
Posts: 430
New England
4.9 6 cylinder right? Some people refer to the 302 V8 correctly as a 4.9 while the rest of us call it a 5.0


84 XJ6 M1
92 Mustang 5.0 Redline
99 Tahoe 2 door Castrol Edge
99 MX5 Miata Anniversary Edition M1
04 Subaru STi Motul
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464720
07/20/17 08:22 AM
07/20/17 08:22 AM
Joined: Jun 2009
Posts: 3,743
Chicago, IL
tomcat27 Offline OP
tomcat27  Offline OP
Joined: Jun 2009
Posts: 3,743
Chicago, IL
Yes. The i300. At first we were gonna put a big v8 in the y truck but then figured out would be more fun to keep the six. Gonna stroke it a little, forged pistons, head work. Just pulled the engine over the weekend. Transmission needs bearings. Gonna freshen up the xfer case. My son wants to add a turbo. I'm not sure....

Last edited by tomcat27; 07/20/17 08:22 AM.

2019 Cherokee, 2018 Jetta, 2014 Sentra, 1995 Escort, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464731
07/20/17 08:33 AM
07/20/17 08:33 AM
Joined: Apr 2008
Posts: 12,976
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,976
Onondaga County
There's a good number of people who like building these engines to take FI over at fordsix.com. It's a good resource.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: can I put an 11" clutch and flywheel in an F150 [Re: 555] #4464744
07/20/17 08:50 AM
07/20/17 08:50 AM
Joined: Jul 2005
Posts: 30,964
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,964
NY
Originally Posted By: 555
4.9 6 cylinder right? Some people refer to the 302 V8 correctly as a 4.9 while the rest of us call it a 5.0


So there is no confusion the 4.9L I referred to is the I6. The V8 is the 5.0L, or 302 as you mentioned. The 4.9L I6 flywheel will take a 10" or 11" clutch.


God Bless Our Troops

Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464781
07/20/17 09:55 AM
07/20/17 09:55 AM
Joined: Dec 2002
Posts: 4,252
The Garden State
Whimsey Offline
Whimsey  Offline
Joined: Dec 2002
Posts: 4,252
The Garden State
I did this with my 1989 F-150 and it made a nice difference with the 11" clutch disc vs the 10". This was due to a leaking slave cylinder replacement. Second time they went back to a 10" clutch disc and I could tell the difference, the 11' one was nicer to engage and shift with.

Whimsey

Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464795
07/20/17 10:08 AM
07/20/17 10:08 AM
Joined: Jun 2009
Posts: 3,743
Chicago, IL
tomcat27 Offline OP
tomcat27  Offline OP
Joined: Jun 2009
Posts: 3,743
Chicago, IL
I do recall seeing some extra holes in the flywheel but I thought they were not tapped. will check again. I've spent a little time at fordsix; not enough to think about FI. good suggestion. thx. thanks for all replies!


2019 Cherokee, 2018 Jetta, 2014 Sentra, 1995 Escort, 1970 Cougar, 2013 XT250, 2010 Vstar, 2014 CTX1300
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464897
07/20/17 11:36 AM
07/20/17 11:36 AM
Joined: Mar 2010
Posts: 5,367
Iowa
The_Eric Offline
The_Eric  Offline
Joined: Mar 2010
Posts: 5,367
Iowa
Most likely the extra holes are tapped but they will have an extra deep unthreaded section that locates the special length shoulder on the flywheel bolt.


2005 Lincoln Aviator 4.6 DOHC
2000 Honda Accord 2.3
2001 Hyundai Elantra 2.0
1979 Ford F-150 351M
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4464904
07/20/17 11:40 AM
07/20/17 11:40 AM
Joined: Nov 2009
Posts: 1,067
Warner Robins, GA
nwjones18 Offline
nwjones18  Offline
Joined: Nov 2009
Posts: 1,067
Warner Robins, GA
My understanding on my 88 is that swapping to an 11in clutch just requires different bolts. I think if you look at the info section on RA it will actually tell you the bolts you need. I've been wanting to swap mine for a while but the current 10in clutch just won't die.


1988 F-150. 4.9 I6 247k. 10w-40 Castrol Syn-blend ACDelco UPF2.
2005 Cadillac STS N* 108k. 5w-30 Castrol Magnatec ACDelco Classic PF61
Re: can I put an 11" clutch and flywheel in an F150 [Re: tomcat27] #4465035
07/20/17 01:42 PM
07/20/17 01:42 PM
Joined: Oct 2014
Posts: 12,558
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,558
Idaho
I had a 79 F150 with the 6 cyl it was a great engine. 300,000 + miles with normal oil pressure.


2015 Ford F150 2.7
2018 Ford F350 6.2

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