C4/ C6 transmission question
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Senior User
Joined: Jun 1999
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From: Campbell U S A
C4/ C6 transmission question
Hey All,
Sorry to cross post, but I've got some questions about more modern trannys than what was originally in my '56 F100.
How do I tell the difference between a C4 and C6 tranny?
And does anyone out there have experience in the speedo drive gears? I went to replace the speedo cable with a new one and found there is no drive gear on the old one. That's why the speedo doesn't work (as far as I know to date). My local ford dealer shows at least three dozen different drive gears with no ideas as to what goes with which tranny. I really would like to at least have some idea of how fast I'm going when the cops pull me over!
Sorry to cross post, but I've got some questions about more modern trannys than what was originally in my '56 F100.
How do I tell the difference between a C4 and C6 tranny?
And does anyone out there have experience in the speedo drive gears? I went to replace the speedo cable with a new one and found there is no drive gear on the old one. That's why the speedo doesn't work (as far as I know to date). My local ford dealer shows at least three dozen different drive gears with no ideas as to what goes with which tranny. I really would like to at least have some idea of how fast I'm going when the cops pull me over!
Posting Guru
Joined: Jul 1999
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From: Inthepast
C4/ C6 transmission question
[FONT COLOR="#0000ff" SIZE="-1" FACE="Tahoma"]Here is a quick way to ID Auto trannies from the pan. [/FONT]
http://member.aol.com/tbeeee/page/tranny.jpg
http://www.dealerconnection.com/DealerConnection/Themes/Standard/Ford/lgo-ford.gif
[FONT COLOR="#ff0000" SIZE="+3" FACE="Bassett"]Stock Man[/FONT]
[FONT COLOR="#0000ff" SIZE="-2" FACE="Tahoma"]
1967 F-250 FE 390 4wd LWB Styleside
1966 F-250 I6 240 2wd LWB Flareside
http://www.hometown.aol.com/tbeeee
http://member.aol.com/tbeeee/page/tranny.jpg
http://www.dealerconnection.com/DealerConnection/Themes/Standard/Ford/lgo-ford.gif
[FONT COLOR="#ff0000" SIZE="+3" FACE="Bassett"]Stock Man[/FONT]
[FONT COLOR="#0000ff" SIZE="-2" FACE="Tahoma"]
1967 F-250 FE 390 4wd LWB Styleside
1966 F-250 I6 240 2wd LWB Flareside
http://www.hometown.aol.com/tbeeee
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
C4/ C6 transmission question
Craig, check your yellow pages for auto shops that calabrate speedos. There is usually one in an average size town. If you can't find one ask the local cops. People go there when caught for speeding and the speedo says not.
HTH
John
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
HTH
John
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
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Senior User
Joined: Jun 1999
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From: Campbell U S A
C4/ C6 transmission question
Thanks for the help guys! I'll slide under the beast inna few minutes and have my answer. I hadn't even thought of the local speedo shop, duh! I should own the place by now with all the gauges I've had done over the years...
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Senior User
Joined: Jun 1999
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From: Campbell U S A
C4/ C6 transmission question
Looked at the tranny last night and it turns out to be something completely different than what I thought! I'm not sure what to do about that. There's three pieces to the case, bell housing, tranny case and tail/rear housing. Leaking like a sieve. When were these trannys made? Are they worth using or rebuilding? I seem to remember my Dad's '65 wagon having a 35XC (1 or 2???) and a cruise-a-matic, but that one is long gone so I can't go look at it.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
C4/ C6 transmission question
Craig, sounds like the FMX to me. I didn't look under my red truck to check out the makeup of the cruse-o-matic, that has the green dot on the shifter, and most likely was replaced after about 66.
I think most agree the C6 is the perfered auto, the C4 is a lighter tranny Ok for just a driver. The FMX was installed in trucks, should work all around, but is considered not as bullet proof as the C6.
My 2
John
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
I think most agree the C6 is the perfered auto, the C4 is a lighter tranny Ok for just a driver. The FMX was installed in trucks, should work all around, but is considered not as bullet proof as the C6.
My 2
John
66 F100s
In the still cool hours of the night, you can hear chevys rusting away.
