Fox Body 5 speed to C4 convert.

Slickfoot · 05-30-2014, 07:54 PM

I'm changing over my 89 Mustang from a 5 speed to C4 . I have a problem with the rear trany mount, It's a little to short to meet the cross member. Do I need a auto trans rear mount ? Help
thanks
Slickfoot

partsbob67 · 05-30-2014, 09:26 PM

same cross member I think. to make it fit cut the welds on the mount sleeves so it slides and elongate the bolt holes. once you bolt it up just tack weld the sleeves.

glen myers · 05-31-2014, 11:53 AM

Or Ford Racing part# M-5059-A is an adjustable one. Will solve your problem. Check driveshaft length you might be short- Steeda makes a very nice billet spacer that works great.

Slickfoot · 05-31-2014, 01:39 PM

Thank you Bob, that worked like a charm. And Glen I thank you for your input allso , I was tipped off about the spacer and was ready.
Now I just need to get the shifter instulled and cluch cable and speed-o cable out, some wireing and we can get it to the track.
You can allways count on Class Racer people
Thanks
Slickfoot 3955

Slickfoot · 06-03-2014, 09:33 PM

I need some help with wiring the park safety switch, were to tap in?
Slichfoot 3955

Capri · 06-10-2014, 10:53 AM

We can sell you what you need. We stock the correct switch.

Slickfoot · 06-10-2014, 05:44 PM

Thanks for the reply Capri, but I used the clutch interlock wires. Just hard to get the wires out from under the dash with the rollbar there.
It's done and running, now having a problem with a flare going into 3rd. the trans builder says it's a qt. low on fluid. We will see.
Thanks for you for the help
Slickfoot

dragracer9911 · 06-10-2014, 06:33 PM

Flair or Flash going into third is common, depending on who built the C-4. We switched from a C-4 to T-5 because of the flash because we felt the stick was quicker and more consistant. We got over 2800 runs with a stock T-5. We now have a used TKO in the car with 800 + runs.

Slickfoot · 06-10-2014, 10:30 PM

The flair seems to go away after the trans is warmed, or at higher RPMs
I also found the pan bolts loose. I don't think that has any thing to do with it. I'm going to put the qt. of fluid in it and try it. I have to put the exhaust back on to try it on the street.
Slickfoot 3955

Capri · 06-13-2014, 03:01 PM

Cool. That works too. We stock the correct NSS to convert to a C-4.

The flare on the 2-3 is an issue in the clutch pack as I recall. If its not more than 200 rpm, it will work fine forever at 6500RPM. An extra qt may not help. I believe I have 7qts in mine with a deep pan.

05-30-2014, 07:54 PM	#1
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Fox Body 5 speed to C4 convert. I'm changing over my 89 Mustang from a 5 speed to C4 . I have a problem with the rear trany mount, It's a little to short to meet the cross member. Do I need a auto trans rear mount ? Help thanks Slickfoot

05-30-2014, 09:26 PM	#2
partsbob67 Member Join Date: Apr 2005 Location: rohnert park,ca Posts: 414 Likes: 11 Liked 79 Times in 11 Posts	Re: Fox Body 5 speed to C4 convert. same cross member I think. to make it fit cut the welds on the mount sleeves so it slides and elongate the bolt holes. once you bolt it up just tack weld the sleeves. __________________ bob beals 7244

05-31-2014, 11:53 AM	#3
glen myers Junior Member Join Date: Aug 2005 Location: GAINESVILLE,VA Posts: 81 Likes: 0 Liked 2 Times in 2 Posts	Re: Fox Body 5 speed to C4 convert. Or Ford Racing part# M-5059-A is an adjustable one. Will solve your problem. Check driveshaft length you might be short- Steeda makes a very nice billet spacer that works great.

05-31-2014, 01:39 PM	#4
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Re: Fox Body 5 speed to C4 convert. Thank you Bob, that worked like a charm. And Glen I thank you for your input allso , I was tipped off about the spacer and was ready. Now I just need to get the shifter instulled and cluch cable and speed-o cable out, some wireing and we can get it to the track. You can allways count on Class Racer people Thanks Slickfoot 3955

06-03-2014, 09:33 PM	#5
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Re: Fox Body 5 speed to C4 convert. I need some help with wiring the park safety switch, were to tap in? Slichfoot 3955

06-10-2014, 10:53 AM	#6
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Fox Body 5 speed to C4 convert. We can sell you what you need. We stock the correct switch.

06-10-2014, 05:44 PM	#7
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Re: Fox Body 5 speed to C4 convert. Thanks for the reply Capri, but I used the clutch interlock wires. Just hard to get the wires out from under the dash with the rollbar there. It's done and running, now having a problem with a flare going into 3rd. the trans builder says it's a qt. low on fluid. We will see. Thanks for you for the help Slickfoot

06-10-2014, 06:33 PM	#8
dragracer9911 Junior Member Join Date: Feb 2010 Location: Southern Maryland Posts: 75 Likes: 0 Liked 3 Times in 1 Post	Re: Fox Body 5 speed to C4 convert. Flair or Flash going into third is common, depending on who built the C-4. We switched from a C-4 to T-5 because of the flash because we felt the stick was quicker and more consistant. We got over 2800 runs with a stock T-5. We now have a used TKO in the car with 800 + runs.

06-10-2014, 10:30 PM	#9
Slickfoot Junior Member Join Date: Aug 2013 Location: Lewiston NY Posts: 77 Likes: 2 Liked 2 Times in 2 Posts	Re: Fox Body 5 speed to C4 convert. The flair seems to go away after the trans is warmed, or at higher RPMs I also found the pan bolts loose. I don't think that has any thing to do with it. I'm going to put the qt. of fluid in it and try it. I have to put the exhaust back on to try it on the street. Slickfoot 3955

06-13-2014, 03:01 PM	#10
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Fox Body 5 speed to C4 convert. Cool. That works too. We stock the correct NSS to convert to a C-4. The flare on the 2-3 is an issue in the clutch pack as I recall. If its not more than 200 rpm, it will work fine forever at 6500RPM. An extra qt may not help. I believe I have 7qts in mine with a deep pan.