T5 to C4 Conversion....help...

S

smr

Member

Nov 14, 2005

167

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16

Nor*Cal (Vacaville)

Feb 14, 2006

#1

• Feb 14, 2006

• #1

I am currently converting my 90 GT T5 to a C4 automatic. Does anyone know what all is involved. I havent been able to find any automatic crossmembers around my area so I couldnt compare them to see if they were diff...also drifeshaft length? Any help would be appreciated. Oh yeah and I am moving my engine back 1" Will this have any impact as far as cross member?

 

Dagz

New Member

Dec 2, 2005

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Quesnel Canada

Feb 14, 2006

#2

• Feb 14, 2006

• #2

smr said:

I am currently converting my 90 GT T5 to a C4 automatic. Does anyone know what all is involved. I havent been able to find any automatic crossmembers around my area so I couldnt compare them to see if they were diff...also drifeshaft length? Any help would be appreciated. Oh yeah and I am moving my engine back 1" Will this have any impact as far as cross member?

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I just don't grab the concept, all these ppl wanna go from an auto to a t5, and your ass backwards. Stinky ATF and power robbing automatics, not to metion fuel economy. I love givving the ol 5.0 a little clutch and lettin her loose. Have you driven one be4 cause i would never concider this in a million years, remember it's a sports car not something your grandma drives. Even if i was only going in straight lines i still can't grasp the concept.

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Feb 14, 2006

#3

• Feb 14, 2006

• #3

driveshaft length is the same. you can modify your crossmember to make it work by grinding off the welds. i dont think moving the engine back one inch will have an effect on the crossmember at all. it will probably work out better that way.

 

MrKwik

Founding Member

Jan 29, 2000

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Kansas City, Kansas

Feb 14, 2006

#4

• Feb 14, 2006

• #4

I agree on the crossmember. I ground the welds (stock T5 crossmember) and slid it all the way forward on the tubes to install the C4, so that 1" setback will be fine. I used the stock driveshaft out of a V8/T5 car and I imagine you will have 1" to play with but if not, you might have to have the shaft shortened 1".

 

S

smr

Member

Nov 14, 2005

167

0

16

Nor*Cal (Vacaville)

Feb 16, 2006

#5

• Feb 16, 2006

• #5

thanks

thanks for the info...I was told by serveral auto "hating" t5 owners (nothing against T5 owners. I own another one as well) that it would be costly and I would need a new cross member and supershort drive shaft. Thanks again for the info.

 

J

JL_Tampa

New Member

Aug 16, 2003

110

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Tampa Bay, FL

Feb 17, 2006

#6

• Feb 17, 2006

• #6

C4s rule!
Big stall and nitrous the T5 boys will be like WTF at the track.
I just got my C4 back from being built and will be swapping the T5 out of the car tomorrow.
I'll be sure to take lots of pics and post them
plus I might need some help along the way
great thread guys keep the possitive info coming.

JL

 

90mustangGT

I felt sorry for girls because

Founding Member

Jan 15, 2002

2,773

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89

Dallas, GA

Feb 17, 2006

#7

• Feb 17, 2006

• #7

I have thought of swapping to a C4 also. It's going to be really hard to manage a manual with my new motor, but then again, it's fun as hell to bang gears. I wish I could "test drive" a C4 reverse manual valve body and a trans brake.

 

4

40th 2004Stang

New Member

Sep 30, 2004

49

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Kansas City

Feb 17, 2006

#8

• Feb 17, 2006

• #8

If you get lucky like I did, I didn't have to change or cut anything. I just turned the crossmember around and it worked fine. Good Luck!

 

J

JL_Tampa

New Member

Aug 16, 2003

110

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0

Tampa Bay, FL

Feb 18, 2006

#9

• Feb 18, 2006

• #9

swap is going well
I got the T5 out today
replaced the rear main seal (just in case since it was there)

I will flush the convertor tomorrow and mount the flex plate
The C4 was in the car before. I got it with the T5 in it. The C4 was wasted do to an improper build.

 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0

Nov 19, 2005

815

5

18

mooresville, nc

Feb 19, 2006

#10

• Feb 19, 2006

• #10

smr said:

thanks for the info...I was told by serveral auto "hating" t5 owners (nothing against T5 owners. I own another one as well) that it would be costly and I would need a new cross member and supershort drive shaft. Thanks again for the info.

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they dont know what they are talking about. the driveshaft wont need to be shortened at all. at any rate, the c4 that is in my car is lighter than the tko 500 that i took out. and thats including the bellhousing on both and the clutch and converter

 

J

JL_Tampa

New Member

Aug 16, 2003

110

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0

Tampa Bay, FL

Feb 19, 2006

#11

• Feb 19, 2006

• #11

my install in progress
http://www.revxtreme.com/forums/showthread.php?p=188620#post188620

 

J

JL_Tampa

New Member

Aug 16, 2003

110

0

0

Tampa Bay, FL

Feb 20, 2006

#12

• Feb 20, 2006

• #12

I need a bit more help with this (see attachment)
1. fluid out ?
2. fluid in ?
3. band adjustment nut
4. dip stick mount hole ?

 

J

JL_Tampa

New Member

Aug 16, 2003

110

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0

Tampa Bay, FL

Feb 20, 2006

#13

• Feb 20, 2006

• #13

here it is

 

Attachments

• C4 RH.webp

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Dagz

New Member

Dec 2, 2005

173

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0

Quesnel Canada

Feb 20, 2006

#14

• Feb 20, 2006

• #14

I still just don't grab the concept, but i guess everyone has different tates and preferences. I guess if we were all the same no one would be cool, and after all with out second and third how would we ever decide who was first. Good luck with the swap i'll be looking for you in my rear view later.

Dagz

 

Swarzkopf

Member

Sep 23, 2004

973

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16

Pittsburgh

Feb 20, 2006

#15

• Feb 20, 2006

• #15

Good luck with the swap i'll be looking for you in my rear view later.

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Most guys who swap to C4s are running 11s or better. The C4 is an outstanding choice for several reasons- it handles big power/torque and allows more precise shifts than any manual clutch transmission can. Plus, any automatic with a high stall, the right gears, and sticky tires will dominate out of the hole.

Most of the real fast guys that I've seen are running a C4 or C4 style transmission.

So, Dagz, what do you have to backup the big talk?

 

J

JL_Tampa

New Member

Aug 16, 2003

110

0

0

Tampa Bay, FL

Feb 20, 2006

#16

• Feb 20, 2006

• #16

My car has been 11.00 so bring it don't sing it Dagz

and on topic I still need some answers to my above post.

 

Blandnuts

I don't swallow; I only swoosh

Founding Member

Aug 21, 2000

1,172

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124

FloorDuh

Feb 20, 2006

#17

• Feb 20, 2006

• #17

That's just too funny.... Da da da.