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Old 01-09-2005, 06:26 AM
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c4 to 5 speed conversion

I was hoping to get some feedback from the experts! I have a 68 Mustang coupe, originally a 6 cylinder automatic car. I am getting ready to put a 289 in it and have been really wanting to go to a 5 speed as well. I know the installation of the 5 speeds in the oldies is a popular t hing but theres some issues that I am not clear on and it may just be a matter of opinion. I picked up a borg warner 5 speed tranny out of an 85 GT. A friend of mine is telling me that the pre 90 model 5 speeds arent as good as the post 90's model.....any truth to that? Will the crossmember out of the late model mustangs work or is the crossmember for the conversion a specially made item. Does the driveshaft in the 68 have to be shortened like the 66 models? Will the bellhousing from the 85' 5.0 bolt to the 289 that I am building? Any input appreciated!

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Old 01-09-2005, 06:46 AM
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Re: c4 to 5 speed conversion

Quote:
Originally posted by 6t8stang
.......... I picked up a borg warner 5 speed tranny out of an 85 GT. A friend of mine is telling me that the pre 90 model 5 speeds arent as good as the post 90's model.....any truth to that?

Will the crossmember out of the late model mustangs work or is the crossmember for the conversion a specially made item.

Does the driveshaft in the 68 have to be shortened like the 66 models?

Will the bellhousing from the 85' 5.0 bolt to the 289 that I am building? Any input appreciated!
1) not sure how much better the later ones are, but the 5 speed in an 85 was good enough for a 5.0L GT so they should be fine for your 289. Before 85 watch out, the factory had 4 speeds in the 79-83 models so they probably didn't have a strong 5 speed available. Not sure about 84 but by 85 the 5 speed was base.

2) I think it should but am not sure....

3) Not sure but probably

4) Yes.
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Old 01-09-2005, 07:02 AM
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well h'mmm

Far as I know the swap can be done with all stock parts..Ford has not changed the bellhousing pattern on small blocks since they started building them..

As far as the cross member is concerned just get that puppy bolted in and see where the tranny mount falls..it may be necessary to change the mount it self..usually does not require a whole new crossmember..The mount itself may be toast anyway and need replacing..

Driveshaft is the same deal..once the tranny is in see if the one you have fits..If you have a good driveline shop in your area those guys do this deal all day long..

The deal on the T-5 tranny is that they were made in the standard and the New world class ways..The NWC tranny has some better gears and bearings and as far as I know the NWC parts fit the old cases..Use the one ya got if it is in good condition..

Gotta think about clutch linkage..I find it best if I can find the underdash bracket and pedal assembly from a manual shift car..along with all the linkage and widgets that go with it..That turns out ot be about the easiest tho it does involve standing on your head under the dash to change that bracket and pedal assembly out..may require drilling some mounting holes for the clutch linkage widgetry..

This is about all I remember about doing one of these deals..

Good luck

OMT
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Old 01-09-2005, 07:59 PM
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engine swap

The thing to remember is to use a 66 or later bellhousing. The 65 and earlier are a 5 bolt and 66 and later are 6 bolt.
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Old 01-11-2005, 04:26 PM
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Hey Max , I'm gonna tell you one more time .... In 65 there were 5 bolt and 6 bolt bells. The early 65 's had the 5 bolt the later 65's had the 6 bolt bell's.

Have a good one Max , Just messing with ya.

Take Care
Earl
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Old 01-11-2005, 05:41 PM
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5 bolts or 6 bolts

Thats how CRS affects ya.
Well at least he knows theres a difference between a 65 and 66 for sure. Duh, then theres the 65 1/2?
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Old 01-11-2005, 05:49 PM
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Re: 5 bolts or 6 bolts

Quote:
Originally posted by Max Keith
Thats how CRS affects ya.
Well at least he knows theres a difference between a 65 and 66 for sure. Duh, then theres the 65 1/2?
Ahh was that the one with 5 1/2 bolts..???

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Old 01-11-2005, 05:56 PM
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5 boly or 6 bolt

Thats the throwaway they welded together, just for spite.
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Old 01-11-2005, 06:02 PM
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Grinns

must be the one I got..Ha!

just too good to pass up..

OMT
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Old 01-11-2005, 06:05 PM
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5 bolts or 6 bolts

Hermetically sealed?
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Old 01-11-2005, 06:14 PM
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???

Yup the one that came in the plastic baggy..

OMT
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