1965 mustang driveline issues

yochase · 01-03-2009, 08:44 PM

I have a '65 mustang that was originally a V8 automatic car, but someone put a L6 and a 3 speed in it. So i am putting a 289 and a C4 back in it. But after I put the drive train in, the drive shaft is about two inches to long any ideas? a easy fix will be to shorten the drive line but i want to know what the problem is, Ya know?

jim2f · 01-12-2009, 07:53 AM

I believe the 3 speed is shorter than the C4 requiring a longer driveshaft. You may need to find an original V8 driveshaft.

Are the motor and tranny mounts in the original positions for the V8? make sure you have the correct tranny crossmember for the C4 as well

yochase · 01-12-2009, 12:02 PM

yes i have got at drive shaft for a v8 c4 and a 9inch rear end that is what confuses me so much every thing is back to stock and it will not fit. like i said before the only thing that is different is the motor mount perches are from a 66 but that only moves the engine up a .25''

jim2f · 01-12-2009, 03:19 PM

the nine inch rear is larger than the original 8. That could be your issue

yochase · 01-12-2009, 06:28 PM

it is a 9 inch not an 8 inch so that should work original was a 9 inch with 4.11s that is all stock so i dont know

i am just going to shorten the drive line

bmxmon · 01-13-2009, 07:10 PM

In 65' the only cars that got the 9" were the shelbys, so jim2f is probably right.

yochase · 01-14-2009, 09:13 AM

oh that is very weird it is a 9 i know it. some one had to swap it out then i will double check. thanks for the help

yochase · 03-05-2009, 11:14 AM

hey thank you for all you help. come to find out i am an idiot it is a 8'' rear end i got the correct drive line and she is running now thanks again

jovyarcher · 10-19-2009, 08:52 PM

I had the same problem and as I saw this post it somewhat helped me on my mustang that was also previously an automatic car... thanks for the post!

01-03-2009, 08:44 PM	#1
yochase 5.00000 my Join Date: Jan 2009 Location: Utah Posts: 12	1965 mustang driveline issues I have a '65 mustang that was originally a V8 automatic car, but someone put a L6 and a 3 speed in it. So i am putting a 289 and a C4 back in it. But after I put the drive train in, the drive shaft is about two inches to long any ideas? a easy fix will be to shorten the drive line but i want to know what the problem is, Ya know?

01-12-2009, 07:53 AM	#2
jim2f 65 coupe Join Date: Nov 2005 Location: missouri Posts: 11	Re: 1965 mustang driveline issues I believe the 3 speed is shorter than the C4 requiring a longer driveshaft. You may need to find an original V8 driveshaft. Are the motor and tranny mounts in the original positions for the V8? make sure you have the correct tranny crossmember for the C4 as well

01-12-2009, 12:02 PM	#3
yochase 5.00000 my Join Date: Jan 2009 Location: Utah Posts: 12	Re: 1965 mustang driveline issues yes i have got at drive shaft for a v8 c4 and a 9inch rear end that is what confuses me so much every thing is back to stock and it will not fit. like i said before the only thing that is different is the motor mount perches are from a 66 but that only moves the engine up a .25'' __________________ 1965 mustang 289 no name yet 1989 5.0 hatch new to the family 2005 V6 soon to be 300 horses in one

01-12-2009, 03:19 PM	#4
jim2f 65 coupe Join Date: Nov 2005 Location: missouri Posts: 11	Re: 1965 mustang driveline issues the nine inch rear is larger than the original 8. That could be your issue

01-12-2009, 06:28 PM	#5
yochase 5.00000 my Join Date: Jan 2009 Location: Utah Posts: 12	Re: 1965 mustang driveline issues it is a 9 inch not an 8 inch so that should work original was a 9 inch with 4.11s that is all stock so i dont know i am just going to shorten the drive line __________________ 1965 mustang 289 no name yet 1989 5.0 hatch new to the family 2005 V6 soon to be 300 horses in one

01-13-2009, 07:10 PM	#6
bmxmon Registered Member Join Date: Mar 2004 Location: Minnesota Posts: 950	Re: 1965 mustang driveline issues In 65' the only cars that got the 9" were the shelbys, so jim2f is probably right. __________________ Alex

01-14-2009, 09:13 AM	#7
yochase 5.00000 my Join Date: Jan 2009 Location: Utah Posts: 12	Re: 1965 mustang driveline issues oh that is very weird it is a 9 i know it. some one had to swap it out then i will double check. thanks for the help __________________ 1965 mustang 289 no name yet 1989 5.0 hatch new to the family 2005 V6 soon to be 300 horses in one

03-05-2009, 11:14 AM	#8
yochase 5.00000 my Join Date: Jan 2009 Location: Utah Posts: 12	Re: 1965 mustang driveline issues hey thank you for all you help. come to find out i am an idiot it is a 8'' rear end i got the correct drive line and she is running now thanks again __________________ 1965 mustang 289 no name yet 1989 5.0 hatch new to the family 2005 V6 soon to be 300 horses in one

10-19-2009, 08:52 PM	#9
jovyarcher Registered Member Join Date: Oct 2009 Posts: 6	Re: 1965 mustang driveline issues I had the same problem and as I saw this post it somewhat helped me on my mustang that was also previously an automatic car... thanks for the post! __________________ My Mustang GT Convertible

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