C6 in a Highboy
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Senior User
Joined: Jun 2002
Posts: 263
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From: Blackville, SC, USA
C6 in a Highboy
I'm putting a 429 in my '76 highboy I'm going to change to an automatic trans. as well. Will a regular old 2wd C6 work or do I need one out of a highboy. I know I will have to fabricate some linkage for the t-case, but will the crossmember work? Will I have to shorten the driveshaft between the trans. and t-case? I'm not in a rush to do this so I don't mind some extra work to save trouble down the road. I plan to have the truck read to run by March.
Junior User
Joined: Jan 2000
Posts: 55
Likes: 0
C6 in a Highboy
killer truck, yes a 2wd trans will work. highboys only came with
standards i think. i have a picture of the bracket that you will need to make for the linkage. and yes you will need to shorten the
driveshaft a little and put a new slip yoke on it for the automatic
transmission. i can send you the picture this evening.
you can e-mail me later to remind if you'd like. GLENB@EV1.NET
1977 F250 4X4 HIGHBOY
auto trans 460ci
>I'm putting a 429 in my '76 highboy I'm going to change to
>an automatic trans. as well. Will a regular old 2wd C6 work
>or do I need one out of a highboy. I know I will have to
>fabricate some linkage for the t-case, but will the
>crossmember work? Will I have to shorten the driveshaft
>between the trans. and t-case? I'm not in a rush to do this
>so I don't mind some extra work to save trouble down the
>road. I plan to have the truck read to run by March.
standards i think. i have a picture of the bracket that you will need to make for the linkage. and yes you will need to shorten the
driveshaft a little and put a new slip yoke on it for the automatic
transmission. i can send you the picture this evening.
you can e-mail me later to remind if you'd like. GLENB@EV1.NET
1977 F250 4X4 HIGHBOY
auto trans 460ci
>I'm putting a 429 in my '76 highboy I'm going to change to
>an automatic trans. as well. Will a regular old 2wd C6 work
>or do I need one out of a highboy. I know I will have to
>fabricate some linkage for the t-case, but will the
>crossmember work? Will I have to shorten the driveshaft
>between the trans. and t-case? I'm not in a rush to do this
>so I don't mind some extra work to save trouble down the
>road. I plan to have the truck read to run by March.
Freshman User
Joined: Nov 2000
Posts: 29
Likes: 0
C6 in a Highboy
on my 76 "hiboy" the tailshaft of the tranny is where the shifter for the 4x4 is bolted to so I think all you would have to do is change your tail shafts?if the splines are the same,I think its not that big of a job?if they didnt change bolt pattern on the tail shafts?
